/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/product-lines/elevator_spec1_product30.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 00:41:08,516 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 00:41:08,518 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 00:41:08,531 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 00:41:08,531 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 00:41:08,532 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 00:41:08,534 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 00:41:08,535 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 00:41:08,537 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 00:41:08,538 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 00:41:08,539 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 00:41:08,540 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 00:41:08,540 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 00:41:08,541 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 00:41:08,542 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 00:41:08,543 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 00:41:08,544 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 00:41:08,545 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 00:41:08,546 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 00:41:08,551 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 00:41:08,552 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 00:41:08,555 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 00:41:08,556 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 00:41:08,557 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 00:41:08,563 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-07 00:41:08,563 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-07 00:41:08,564 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-07 00:41:08,564 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-07 00:41:08,565 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-07 00:41:08,569 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-07 00:41:08,569 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-07 00:41:08,570 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-07 00:41:08,570 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-07 00:41:08,572 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-07 00:41:08,573 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-07 00:41:08,574 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-07 00:41:08,574 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-07 00:41:08,574 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-07 00:41:08,575 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 00:41:08,575 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 00:41:08,579 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 00:41:08,579 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-07 00:41:08,602 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 00:41:08,602 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 00:41:08,604 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 00:41:08,604 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 00:41:08,605 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 00:41:08,605 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 00:41:08,605 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 00:41:08,605 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 00:41:08,605 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 00:41:08,605 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 00:41:08,606 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 00:41:08,606 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 00:41:08,606 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 00:41:08,606 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 00:41:08,606 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 00:41:08,607 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 00:41:08,607 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 00:41:08,607 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 00:41:08,607 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 00:41:08,607 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 00:41:08,608 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 00:41:08,608 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 00:41:08,608 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 00:41:08,608 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 00:41:08,609 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 00:41:08,609 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 00:41:08,609 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 00:41:08,609 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 00:41:08,609 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-11-07 00:41:08,880 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 00:41:08,895 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 00:41:08,899 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 00:41:08,901 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 00:41:08,901 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 00:41:08,904 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec1_product30.cil.c [2019-11-07 00:41:08,977 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/598b96404/a452618b68e64f019208f260dafc95e0/FLAG4ce71891c [2019-11-07 00:41:09,665 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 00:41:09,667 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec1_product30.cil.c [2019-11-07 00:41:09,707 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/598b96404/a452618b68e64f019208f260dafc95e0/FLAG4ce71891c [2019-11-07 00:41:09,803 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/598b96404/a452618b68e64f019208f260dafc95e0 [2019-11-07 00:41:09,811 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 00:41:09,812 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 00:41:09,813 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 00:41:09,813 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 00:41:09,817 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 00:41:09,818 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:41:09" (1/1) ... [2019-11-07 00:41:09,821 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ad26e67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:41:09, skipping insertion in model container [2019-11-07 00:41:09,821 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:41:09" (1/1) ... [2019-11-07 00:41:09,828 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 00:41:09,912 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 00:41:10,570 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 00:41:10,591 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 00:41:10,729 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 00:41:10,799 INFO L192 MainTranslator]: Completed translation [2019-11-07 00:41:10,799 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:41:10 WrapperNode [2019-11-07 00:41:10,799 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 00:41:10,800 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 00:41:10,800 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 00:41:10,801 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 00:41:10,812 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:41:10" (1/1) ... [2019-11-07 00:41:10,813 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:41:10" (1/1) ... [2019-11-07 00:41:10,845 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:41:10" (1/1) ... [2019-11-07 00:41:10,845 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:41:10" (1/1) ... [2019-11-07 00:41:10,911 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:41:10" (1/1) ... [2019-11-07 00:41:10,946 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:41:10" (1/1) ... [2019-11-07 00:41:10,965 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:41:10" (1/1) ... [2019-11-07 00:41:11,011 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 00:41:11,012 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 00:41:11,012 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 00:41:11,012 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 00:41:11,013 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:41:10" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 00:41:11,095 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 00:41:11,096 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 00:41:11,096 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-11-07 00:41:11,096 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-11-07 00:41:11,096 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-11-07 00:41:11,097 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-11-07 00:41:11,097 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-11-07 00:41:11,097 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-11-07 00:41:11,097 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-11-07 00:41:11,098 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-11-07 00:41:11,098 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-11-07 00:41:11,098 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-11-07 00:41:11,099 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-11-07 00:41:11,099 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-11-07 00:41:11,099 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-11-07 00:41:11,099 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-11-07 00:41:11,099 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-11-07 00:41:11,100 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-11-07 00:41:11,100 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-11-07 00:41:11,100 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-11-07 00:41:11,100 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-11-07 00:41:11,101 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-11-07 00:41:11,101 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-11-07 00:41:11,101 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-11-07 00:41:11,101 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-11-07 00:41:11,102 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-11-07 00:41:11,102 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-11-07 00:41:11,102 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-11-07 00:41:11,102 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-11-07 00:41:11,102 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-11-07 00:41:11,103 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-11-07 00:41:11,103 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-11-07 00:41:11,103 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-11-07 00:41:11,103 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 00:41:11,104 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-11-07 00:41:11,104 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-11-07 00:41:11,104 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-11-07 00:41:11,104 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-11-07 00:41:11,104 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-11-07 00:41:11,104 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-11-07 00:41:11,105 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-11-07 00:41:11,105 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-11-07 00:41:11,105 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-11-07 00:41:11,105 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-11-07 00:41:11,106 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-11-07 00:41:11,106 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-11-07 00:41:11,106 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-11-07 00:41:11,106 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-11-07 00:41:11,106 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-11-07 00:41:11,107 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-11-07 00:41:11,107 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-11-07 00:41:11,107 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__weight [2019-11-07 00:41:11,107 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-11-07 00:41:11,107 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-11-07 00:41:11,108 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-11-07 00:41:11,108 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-11-07 00:41:11,108 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-11-07 00:41:11,108 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-11-07 00:41:11,108 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-11-07 00:41:11,109 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-11-07 00:41:11,109 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-11-07 00:41:11,109 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-11-07 00:41:11,109 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2019-11-07 00:41:11,109 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-11-07 00:41:11,110 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-11-07 00:41:11,110 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-11-07 00:41:11,110 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-11-07 00:41:11,110 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-11-07 00:41:11,110 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-11-07 00:41:11,111 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-11-07 00:41:11,111 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__twothirdsfull [2019-11-07 00:41:11,111 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-11-07 00:41:11,111 INFO L138 BoogieDeclarations]: Found implementation of procedure printState__wrappee__twothirdsfull [2019-11-07 00:41:11,111 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-11-07 00:41:11,112 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-11-07 00:41:11,112 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2019-11-07 00:41:11,112 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__2 [2019-11-07 00:41:11,112 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__3 [2019-11-07 00:41:11,112 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__4 [2019-11-07 00:41:11,113 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 00:41:11,113 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 00:41:11,113 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-11-07 00:41:11,113 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-11-07 00:41:11,113 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-11-07 00:41:11,114 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-11-07 00:41:11,114 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-11-07 00:41:11,114 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-11-07 00:41:11,114 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-11-07 00:41:11,114 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-11-07 00:41:11,115 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-11-07 00:41:11,115 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-11-07 00:41:11,115 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-11-07 00:41:11,115 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-07 00:41:11,115 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-07 00:41:11,116 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-11-07 00:41:11,116 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-07 00:41:11,116 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-07 00:41:11,116 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 00:41:11,116 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-07 00:41:11,116 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-11-07 00:41:11,117 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 00:41:11,117 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-11-07 00:41:11,117 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-11-07 00:41:11,117 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 00:41:11,117 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-11-07 00:41:11,118 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-11-07 00:41:11,118 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 00:41:11,118 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-11-07 00:41:11,118 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-11-07 00:41:11,118 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-11-07 00:41:11,118 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-11-07 00:41:11,119 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-11-07 00:41:11,119 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-11-07 00:41:11,119 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-11-07 00:41:11,119 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-11-07 00:41:11,119 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-11-07 00:41:11,119 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-07 00:41:11,119 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-11-07 00:41:11,120 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-11-07 00:41:11,120 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-11-07 00:41:11,120 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-11-07 00:41:11,120 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-11-07 00:41:11,120 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-11-07 00:41:11,120 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-11-07 00:41:11,120 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-11-07 00:41:11,121 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-11-07 00:41:11,121 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-11-07 00:41:11,121 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-11-07 00:41:11,121 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-11-07 00:41:11,121 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-11-07 00:41:11,121 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2019-11-07 00:41:11,121 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__4 [2019-11-07 00:41:11,122 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-11-07 00:41:11,122 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 00:41:11,122 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-11-07 00:41:11,122 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-11-07 00:41:11,122 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-11-07 00:41:11,122 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-11-07 00:41:11,123 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-11-07 00:41:11,123 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-11-07 00:41:11,123 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-11-07 00:41:11,123 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__2 [2019-11-07 00:41:11,123 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-11-07 00:41:11,123 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-11-07 00:41:11,123 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-11-07 00:41:11,124 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-11-07 00:41:11,124 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-11-07 00:41:11,124 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-11-07 00:41:11,124 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-11-07 00:41:11,124 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-11-07 00:41:11,124 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-11-07 00:41:11,125 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-11-07 00:41:11,125 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-11-07 00:41:11,125 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__weight [2019-11-07 00:41:11,125 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-11-07 00:41:11,125 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-11-07 00:41:11,125 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-11-07 00:41:11,125 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-11-07 00:41:11,125 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-11-07 00:41:11,126 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2019-11-07 00:41:11,126 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-11-07 00:41:11,126 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-11-07 00:41:11,126 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-11-07 00:41:11,126 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-11-07 00:41:11,126 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-11-07 00:41:11,126 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-11-07 00:41:11,127 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__twothirdsfull [2019-11-07 00:41:11,127 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__3 [2019-11-07 00:41:11,127 INFO L130 BoogieDeclarations]: Found specification of procedure printState__wrappee__twothirdsfull [2019-11-07 00:41:11,127 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-11-07 00:41:11,127 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 00:41:11,127 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-07 00:41:11,127 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 00:41:13,716 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 00:41:13,716 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-11-07 00:41:13,718 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:41:13 BoogieIcfgContainer [2019-11-07 00:41:13,718 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 00:41:13,719 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 00:41:13,719 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 00:41:13,723 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 00:41:13,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:41:09" (1/3) ... [2019-11-07 00:41:13,724 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31b073ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:41:13, skipping insertion in model container [2019-11-07 00:41:13,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:41:10" (2/3) ... [2019-11-07 00:41:13,725 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31b073ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:41:13, skipping insertion in model container [2019-11-07 00:41:13,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:41:13" (3/3) ... [2019-11-07 00:41:13,728 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product30.cil.c [2019-11-07 00:41:13,738 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 00:41:13,750 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 00:41:13,761 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 00:41:13,812 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 00:41:13,812 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 00:41:13,812 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 00:41:13,812 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 00:41:13,813 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 00:41:13,813 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 00:41:13,813 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 00:41:13,813 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 00:41:13,861 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states. [2019-11-07 00:41:13,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-11-07 00:41:13,892 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:41:13,894 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:41:13,899 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:41:13,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:41:13,906 INFO L82 PathProgramCache]: Analyzing trace with hash -2022384104, now seen corresponding path program 1 times [2019-11-07 00:41:13,916 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:41:13,917 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523484679] [2019-11-07 00:41:13,917 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:41:14,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:14,632 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:41:14,633 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523484679] [2019-11-07 00:41:14,634 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823569990] [2019-11-07 00:41:14,635 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:41:15,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:15,339 INFO L256 TraceCheckSpWp]: Trace formula consists of 3170 conjuncts, 1 conjunts are in the unsatisfiable core [2019-11-07 00:41:15,356 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:41:15,388 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-07 00:41:15,389 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:41:15,593 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-07 00:41:15,593 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:41:15,594 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [4] total 4 [2019-11-07 00:41:15,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499688903] [2019-11-07 00:41:15,603 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-07 00:41:15,606 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:41:15,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-07 00:41:15,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 00:41:15,624 INFO L87 Difference]: Start difference. First operand 806 states. Second operand 2 states. [2019-11-07 00:41:15,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:41:15,759 INFO L93 Difference]: Finished difference Result 682 states and 1081 transitions. [2019-11-07 00:41:15,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-07 00:41:15,761 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 116 [2019-11-07 00:41:15,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:41:15,791 INFO L225 Difference]: With dead ends: 682 [2019-11-07 00:41:15,791 INFO L226 Difference]: Without dead ends: 645 [2019-11-07 00:41:15,796 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 00:41:15,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2019-11-07 00:41:15,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 645. [2019-11-07 00:41:15,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 645 states. [2019-11-07 00:41:15,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 1026 transitions. [2019-11-07 00:41:15,924 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 1026 transitions. Word has length 116 [2019-11-07 00:41:15,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:41:15,936 INFO L462 AbstractCegarLoop]: Abstraction has 645 states and 1026 transitions. [2019-11-07 00:41:15,937 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-07 00:41:15,937 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 1026 transitions. [2019-11-07 00:41:15,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-11-07 00:41:15,946 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:41:15,946 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:41:16,147 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:41:16,147 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:41:16,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:41:16,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1798333227, now seen corresponding path program 1 times [2019-11-07 00:41:16,149 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:41:16,149 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162342712] [2019-11-07 00:41:16,149 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:41:16,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:16,468 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:41:16,469 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162342712] [2019-11-07 00:41:16,469 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551229427] [2019-11-07 00:41:16,469 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:41:17,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:17,060 INFO L256 TraceCheckSpWp]: Trace formula consists of 3173 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:41:17,073 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:41:17,189 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-07 00:41:17,189 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:41:17,430 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:41:17,430 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:41:17,430 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-11-07 00:41:17,431 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930156864] [2019-11-07 00:41:17,433 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:41:17,433 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:41:17,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:41:17,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:41:17,434 INFO L87 Difference]: Start difference. First operand 645 states and 1026 transitions. Second operand 4 states. [2019-11-07 00:41:17,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:41:17,553 INFO L93 Difference]: Finished difference Result 1262 states and 2025 transitions. [2019-11-07 00:41:17,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 00:41:17,554 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 118 [2019-11-07 00:41:17,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:41:17,565 INFO L225 Difference]: With dead ends: 1262 [2019-11-07 00:41:17,565 INFO L226 Difference]: Without dead ends: 645 [2019-11-07 00:41:17,575 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 232 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-11-07 00:41:17,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2019-11-07 00:41:17,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 645. [2019-11-07 00:41:17,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 645 states. [2019-11-07 00:41:17,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 1025 transitions. [2019-11-07 00:41:17,631 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 1025 transitions. Word has length 118 [2019-11-07 00:41:17,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:41:17,632 INFO L462 AbstractCegarLoop]: Abstraction has 645 states and 1025 transitions. [2019-11-07 00:41:17,632 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:41:17,632 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 1025 transitions. [2019-11-07 00:41:17,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-11-07 00:41:17,634 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:41:17,635 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:41:17,843 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:41:17,843 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:41:17,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:41:17,844 INFO L82 PathProgramCache]: Analyzing trace with hash 2025770863, now seen corresponding path program 1 times [2019-11-07 00:41:17,844 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:41:17,844 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187184038] [2019-11-07 00:41:17,844 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:41:17,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:18,023 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:41:18,024 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187184038] [2019-11-07 00:41:18,024 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135413555] [2019-11-07 00:41:18,025 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:41:18,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:18,738 INFO L256 TraceCheckSpWp]: Trace formula consists of 3175 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:41:18,745 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:41:18,782 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-07 00:41:18,782 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:41:18,989 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:41:18,989 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:41:18,990 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-11-07 00:41:18,990 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944800570] [2019-11-07 00:41:18,991 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:41:18,991 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:41:18,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:41:18,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:41:18,992 INFO L87 Difference]: Start difference. First operand 645 states and 1025 transitions. Second operand 4 states. [2019-11-07 00:41:19,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:41:19,068 INFO L93 Difference]: Finished difference Result 1262 states and 2023 transitions. [2019-11-07 00:41:19,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 00:41:19,070 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 120 [2019-11-07 00:41:19,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:41:19,075 INFO L225 Difference]: With dead ends: 1262 [2019-11-07 00:41:19,076 INFO L226 Difference]: Without dead ends: 645 [2019-11-07 00:41:19,079 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 236 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-11-07 00:41:19,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2019-11-07 00:41:19,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 645. [2019-11-07 00:41:19,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 645 states. [2019-11-07 00:41:19,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 1024 transitions. [2019-11-07 00:41:19,110 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 1024 transitions. Word has length 120 [2019-11-07 00:41:19,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:41:19,111 INFO L462 AbstractCegarLoop]: Abstraction has 645 states and 1024 transitions. [2019-11-07 00:41:19,111 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:41:19,111 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 1024 transitions. [2019-11-07 00:41:19,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-11-07 00:41:19,113 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:41:19,114 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:41:19,321 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:41:19,321 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:41:19,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:41:19,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1223604915, now seen corresponding path program 1 times [2019-11-07 00:41:19,322 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:41:19,322 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433284103] [2019-11-07 00:41:19,323 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:41:19,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:19,517 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:41:19,518 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433284103] [2019-11-07 00:41:19,518 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400886166] [2019-11-07 00:41:19,518 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:41:20,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:20,124 INFO L256 TraceCheckSpWp]: Trace formula consists of 3177 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:41:20,131 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:41:20,173 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-07 00:41:20,173 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:41:20,389 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:41:20,389 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:41:20,389 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-11-07 00:41:20,390 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105415665] [2019-11-07 00:41:20,390 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:41:20,391 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:41:20,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:41:20,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:41:20,392 INFO L87 Difference]: Start difference. First operand 645 states and 1024 transitions. Second operand 4 states. [2019-11-07 00:41:20,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:41:20,478 INFO L93 Difference]: Finished difference Result 1269 states and 2030 transitions. [2019-11-07 00:41:20,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:41:20,478 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 122 [2019-11-07 00:41:20,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:41:20,485 INFO L225 Difference]: With dead ends: 1269 [2019-11-07 00:41:20,485 INFO L226 Difference]: Without dead ends: 654 [2019-11-07 00:41:20,491 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 240 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-11-07 00:41:20,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2019-11-07 00:41:20,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 654. [2019-11-07 00:41:20,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 654 states. [2019-11-07 00:41:20,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 1036 transitions. [2019-11-07 00:41:20,524 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 1036 transitions. Word has length 122 [2019-11-07 00:41:20,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:41:20,524 INFO L462 AbstractCegarLoop]: Abstraction has 654 states and 1036 transitions. [2019-11-07 00:41:20,525 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:41:20,525 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 1036 transitions. [2019-11-07 00:41:20,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-11-07 00:41:20,532 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:41:20,532 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:41:20,739 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:41:20,739 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:41:20,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:41:20,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1957225257, now seen corresponding path program 1 times [2019-11-07 00:41:20,741 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:41:20,741 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128649183] [2019-11-07 00:41:20,741 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:41:20,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:20,949 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:41:20,949 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128649183] [2019-11-07 00:41:20,949 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158285477] [2019-11-07 00:41:20,950 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:41:21,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:21,514 INFO L256 TraceCheckSpWp]: Trace formula consists of 3178 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:41:21,519 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:41:21,549 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-07 00:41:21,550 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:41:21,736 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:41:21,736 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:41:21,737 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-11-07 00:41:21,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069692379] [2019-11-07 00:41:21,737 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:41:21,737 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:41:21,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:41:21,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:41:21,738 INFO L87 Difference]: Start difference. First operand 654 states and 1036 transitions. Second operand 4 states. [2019-11-07 00:41:21,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:41:21,829 INFO L93 Difference]: Finished difference Result 1271 states and 2031 transitions. [2019-11-07 00:41:21,830 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:41:21,831 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 123 [2019-11-07 00:41:21,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:41:21,839 INFO L225 Difference]: With dead ends: 1271 [2019-11-07 00:41:21,840 INFO L226 Difference]: Without dead ends: 654 [2019-11-07 00:41:21,844 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 242 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-11-07 00:41:21,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2019-11-07 00:41:21,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 654. [2019-11-07 00:41:21,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 654 states. [2019-11-07 00:41:21,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 1035 transitions. [2019-11-07 00:41:21,952 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 1035 transitions. Word has length 123 [2019-11-07 00:41:21,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:41:21,952 INFO L462 AbstractCegarLoop]: Abstraction has 654 states and 1035 transitions. [2019-11-07 00:41:21,952 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:41:21,953 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 1035 transitions. [2019-11-07 00:41:21,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-11-07 00:41:21,959 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:41:21,959 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:41:22,170 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:41:22,170 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:41:22,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:41:22,171 INFO L82 PathProgramCache]: Analyzing trace with hash 974787383, now seen corresponding path program 1 times [2019-11-07 00:41:22,171 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:41:22,171 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468776042] [2019-11-07 00:41:22,172 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:41:22,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:22,347 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:41:22,348 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468776042] [2019-11-07 00:41:22,348 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868249950] [2019-11-07 00:41:22,348 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:41:22,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:22,969 INFO L256 TraceCheckSpWp]: Trace formula consists of 3179 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:41:22,975 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:41:23,011 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-07 00:41:23,011 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:41:23,199 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:41:23,200 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:41:23,200 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-11-07 00:41:23,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264265370] [2019-11-07 00:41:23,201 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:41:23,201 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:41:23,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:41:23,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:41:23,202 INFO L87 Difference]: Start difference. First operand 654 states and 1035 transitions. Second operand 4 states. [2019-11-07 00:41:23,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:41:23,275 INFO L93 Difference]: Finished difference Result 1271 states and 2030 transitions. [2019-11-07 00:41:23,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:41:23,276 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 124 [2019-11-07 00:41:23,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:41:23,281 INFO L225 Difference]: With dead ends: 1271 [2019-11-07 00:41:23,281 INFO L226 Difference]: Without dead ends: 654 [2019-11-07 00:41:23,285 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 244 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:41:23,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2019-11-07 00:41:23,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 654. [2019-11-07 00:41:23,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 654 states. [2019-11-07 00:41:23,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 1034 transitions. [2019-11-07 00:41:23,313 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 1034 transitions. Word has length 124 [2019-11-07 00:41:23,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:41:23,314 INFO L462 AbstractCegarLoop]: Abstraction has 654 states and 1034 transitions. [2019-11-07 00:41:23,314 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:41:23,314 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 1034 transitions. [2019-11-07 00:41:23,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-11-07 00:41:23,317 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:41:23,317 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:41:23,533 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:41:23,534 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:41:23,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:41:23,535 INFO L82 PathProgramCache]: Analyzing trace with hash 131398875, now seen corresponding path program 1 times [2019-11-07 00:41:23,535 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:41:23,535 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348705574] [2019-11-07 00:41:23,536 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:41:23,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:23,720 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-07 00:41:23,721 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348705574] [2019-11-07 00:41:23,721 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359454276] [2019-11-07 00:41:23,721 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:41:24,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:24,337 INFO L256 TraceCheckSpWp]: Trace formula consists of 3180 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:41:24,342 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:41:24,384 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 00:41:24,384 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:41:24,610 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:41:24,611 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:41:24,611 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-11-07 00:41:24,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434821250] [2019-11-07 00:41:24,612 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:41:24,613 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:41:24,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:41:24,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-11-07 00:41:24,619 INFO L87 Difference]: Start difference. First operand 654 states and 1034 transitions. Second operand 4 states. [2019-11-07 00:41:24,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:41:24,836 INFO L93 Difference]: Finished difference Result 1270 states and 2030 transitions. [2019-11-07 00:41:24,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 00:41:24,837 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 125 [2019-11-07 00:41:24,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:41:24,843 INFO L225 Difference]: With dead ends: 1270 [2019-11-07 00:41:24,843 INFO L226 Difference]: Without dead ends: 654 [2019-11-07 00:41:24,848 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 248 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-11-07 00:41:24,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2019-11-07 00:41:24,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 654. [2019-11-07 00:41:24,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 654 states. [2019-11-07 00:41:24,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 1029 transitions. [2019-11-07 00:41:24,881 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 1029 transitions. Word has length 125 [2019-11-07 00:41:24,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:41:24,881 INFO L462 AbstractCegarLoop]: Abstraction has 654 states and 1029 transitions. [2019-11-07 00:41:24,881 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:41:24,882 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 1029 transitions. [2019-11-07 00:41:24,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-11-07 00:41:24,885 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:41:24,885 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:41:25,095 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:41:25,095 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:41:25,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:41:25,097 INFO L82 PathProgramCache]: Analyzing trace with hash 2025700873, now seen corresponding path program 1 times [2019-11-07 00:41:25,097 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:41:25,097 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544206484] [2019-11-07 00:41:25,097 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:41:25,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:25,292 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-07 00:41:25,293 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544206484] [2019-11-07 00:41:25,297 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733558926] [2019-11-07 00:41:25,297 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:41:25,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:26,001 INFO L256 TraceCheckSpWp]: Trace formula consists of 3182 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:41:26,005 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:41:26,035 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 00:41:26,035 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:41:26,223 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:41:26,223 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:41:26,223 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-11-07 00:41:26,224 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538451211] [2019-11-07 00:41:26,224 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:41:26,224 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:41:26,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:41:26,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-11-07 00:41:26,225 INFO L87 Difference]: Start difference. First operand 654 states and 1029 transitions. Second operand 4 states. [2019-11-07 00:41:26,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:41:26,393 INFO L93 Difference]: Finished difference Result 1270 states and 2020 transitions. [2019-11-07 00:41:26,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 00:41:26,394 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 127 [2019-11-07 00:41:26,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:41:26,399 INFO L225 Difference]: With dead ends: 1270 [2019-11-07 00:41:26,399 INFO L226 Difference]: Without dead ends: 654 [2019-11-07 00:41:26,403 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 252 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-11-07 00:41:26,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2019-11-07 00:41:26,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 654. [2019-11-07 00:41:26,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 654 states. [2019-11-07 00:41:26,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 1024 transitions. [2019-11-07 00:41:26,424 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 1024 transitions. Word has length 127 [2019-11-07 00:41:26,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:41:26,424 INFO L462 AbstractCegarLoop]: Abstraction has 654 states and 1024 transitions. [2019-11-07 00:41:26,424 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:41:26,424 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 1024 transitions. [2019-11-07 00:41:26,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-11-07 00:41:26,426 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:41:26,426 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:41:26,642 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:41:26,642 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:41:26,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:41:26,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1647818991, now seen corresponding path program 1 times [2019-11-07 00:41:26,643 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:41:26,643 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914331253] [2019-11-07 00:41:26,643 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:41:26,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:26,835 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-07 00:41:26,836 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914331253] [2019-11-07 00:41:26,836 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163639594] [2019-11-07 00:41:26,836 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:41:27,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:27,535 INFO L256 TraceCheckSpWp]: Trace formula consists of 3184 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:41:27,540 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:41:27,595 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 00:41:27,595 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:41:27,863 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:41:27,864 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:41:27,864 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-11-07 00:41:27,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509209949] [2019-11-07 00:41:27,865 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:41:27,865 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:41:27,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:41:27,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-11-07 00:41:27,865 INFO L87 Difference]: Start difference. First operand 654 states and 1024 transitions. Second operand 4 states. [2019-11-07 00:41:28,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:41:28,071 INFO L93 Difference]: Finished difference Result 1306 states and 2069 transitions. [2019-11-07 00:41:28,072 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:41:28,072 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 129 [2019-11-07 00:41:28,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:41:28,078 INFO L225 Difference]: With dead ends: 1306 [2019-11-07 00:41:28,078 INFO L226 Difference]: Without dead ends: 693 [2019-11-07 00:41:28,082 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 256 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-11-07 00:41:28,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2019-11-07 00:41:28,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 693. [2019-11-07 00:41:28,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 693 states. [2019-11-07 00:41:28,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 1088 transitions. [2019-11-07 00:41:28,103 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 1088 transitions. Word has length 129 [2019-11-07 00:41:28,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:41:28,104 INFO L462 AbstractCegarLoop]: Abstraction has 693 states and 1088 transitions. [2019-11-07 00:41:28,104 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:41:28,104 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 1088 transitions. [2019-11-07 00:41:28,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-11-07 00:41:28,106 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:41:28,106 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:41:28,314 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:41:28,314 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:41:28,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:41:28,315 INFO L82 PathProgramCache]: Analyzing trace with hash 999739231, now seen corresponding path program 1 times [2019-11-07 00:41:28,315 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:41:28,315 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347099734] [2019-11-07 00:41:28,315 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:41:28,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:28,469 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-07 00:41:28,469 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347099734] [2019-11-07 00:41:28,469 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625155460] [2019-11-07 00:41:28,470 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:41:29,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:29,120 INFO L256 TraceCheckSpWp]: Trace formula consists of 3185 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:41:29,124 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:41:29,162 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 00:41:29,162 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:41:29,373 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:41:29,374 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:41:29,374 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-11-07 00:41:29,374 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230016271] [2019-11-07 00:41:29,375 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:41:29,375 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:41:29,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:41:29,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-11-07 00:41:29,376 INFO L87 Difference]: Start difference. First operand 693 states and 1088 transitions. Second operand 4 states. [2019-11-07 00:41:29,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:41:29,564 INFO L93 Difference]: Finished difference Result 1309 states and 2072 transitions. [2019-11-07 00:41:29,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:41:29,564 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 130 [2019-11-07 00:41:29,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:41:29,569 INFO L225 Difference]: With dead ends: 1309 [2019-11-07 00:41:29,570 INFO L226 Difference]: Without dead ends: 693 [2019-11-07 00:41:29,573 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 258 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-11-07 00:41:29,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2019-11-07 00:41:29,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 693. [2019-11-07 00:41:29,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 693 states. [2019-11-07 00:41:29,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 1083 transitions. [2019-11-07 00:41:29,594 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 1083 transitions. Word has length 130 [2019-11-07 00:41:29,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:41:29,594 INFO L462 AbstractCegarLoop]: Abstraction has 693 states and 1083 transitions. [2019-11-07 00:41:29,594 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:41:29,594 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 1083 transitions. [2019-11-07 00:41:29,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-11-07 00:41:29,597 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:41:29,597 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:41:29,812 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:41:29,812 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:41:29,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:41:29,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1612034594, now seen corresponding path program 1 times [2019-11-07 00:41:29,814 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:41:29,814 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007519404] [2019-11-07 00:41:29,814 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:41:29,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:30,341 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-07 00:41:30,341 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007519404] [2019-11-07 00:41:30,342 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771083489] [2019-11-07 00:41:30,342 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:41:30,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:30,972 INFO L256 TraceCheckSpWp]: Trace formula consists of 3181 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-07 00:41:30,976 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:41:31,076 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 00:41:31,076 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:41:31,467 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 00:41:31,586 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-07 00:41:31,586 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:41:31,586 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 9] total 16 [2019-11-07 00:41:31,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352234485] [2019-11-07 00:41:31,587 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-07 00:41:31,587 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:41:31,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-07 00:41:31,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2019-11-07 00:41:31,588 INFO L87 Difference]: Start difference. First operand 693 states and 1083 transitions. Second operand 9 states. [2019-11-07 00:41:31,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:41:31,837 INFO L93 Difference]: Finished difference Result 1322 states and 2086 transitions. [2019-11-07 00:41:31,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-07 00:41:31,837 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 130 [2019-11-07 00:41:31,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:41:31,843 INFO L225 Difference]: With dead ends: 1322 [2019-11-07 00:41:31,844 INFO L226 Difference]: Without dead ends: 709 [2019-11-07 00:41:31,848 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 245 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2019-11-07 00:41:31,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2019-11-07 00:41:31,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 702. [2019-11-07 00:41:31,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 702 states. [2019-11-07 00:41:31,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 702 states to 702 states and 1096 transitions. [2019-11-07 00:41:31,878 INFO L78 Accepts]: Start accepts. Automaton has 702 states and 1096 transitions. Word has length 130 [2019-11-07 00:41:31,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:41:31,879 INFO L462 AbstractCegarLoop]: Abstraction has 702 states and 1096 transitions. [2019-11-07 00:41:31,879 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-07 00:41:31,879 INFO L276 IsEmpty]: Start isEmpty. Operand 702 states and 1096 transitions. [2019-11-07 00:41:31,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-11-07 00:41:31,881 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:41:31,881 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:41:32,089 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:41:32,089 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:41:32,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:41:32,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1873445245, now seen corresponding path program 1 times [2019-11-07 00:41:32,090 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:41:32,091 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69893766] [2019-11-07 00:41:32,091 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:41:32,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:32,199 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-07 00:41:32,199 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69893766] [2019-11-07 00:41:32,200 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141367611] [2019-11-07 00:41:32,200 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:41:32,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:32,946 INFO L256 TraceCheckSpWp]: Trace formula consists of 3180 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-07 00:41:32,950 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:41:33,007 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-07 00:41:33,007 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:41:33,287 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-07 00:41:33,288 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:41:33,288 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 13 [2019-11-07 00:41:33,288 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209645217] [2019-11-07 00:41:33,288 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-07 00:41:33,289 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:41:33,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-07 00:41:33,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2019-11-07 00:41:33,289 INFO L87 Difference]: Start difference. First operand 702 states and 1096 transitions. Second operand 11 states. [2019-11-07 00:41:33,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:41:33,436 INFO L93 Difference]: Finished difference Result 1260 states and 1988 transitions. [2019-11-07 00:41:33,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-07 00:41:33,436 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 130 [2019-11-07 00:41:33,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:41:33,441 INFO L225 Difference]: With dead ends: 1260 [2019-11-07 00:41:33,441 INFO L226 Difference]: Without dead ends: 719 [2019-11-07 00:41:33,444 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 251 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2019-11-07 00:41:33,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2019-11-07 00:41:33,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 709. [2019-11-07 00:41:33,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 709 states. [2019-11-07 00:41:33,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 709 states to 709 states and 1106 transitions. [2019-11-07 00:41:33,468 INFO L78 Accepts]: Start accepts. Automaton has 709 states and 1106 transitions. Word has length 130 [2019-11-07 00:41:33,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:41:33,468 INFO L462 AbstractCegarLoop]: Abstraction has 709 states and 1106 transitions. [2019-11-07 00:41:33,468 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-07 00:41:33,469 INFO L276 IsEmpty]: Start isEmpty. Operand 709 states and 1106 transitions. [2019-11-07 00:41:33,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-11-07 00:41:33,471 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:41:33,471 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:41:33,684 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:41:33,684 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:41:33,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:41:33,685 INFO L82 PathProgramCache]: Analyzing trace with hash -892585654, now seen corresponding path program 1 times [2019-11-07 00:41:33,685 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:41:33,685 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615352630] [2019-11-07 00:41:33,685 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:41:33,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:33,774 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:41:33,775 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615352630] [2019-11-07 00:41:33,775 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811755320] [2019-11-07 00:41:33,775 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:41:34,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:34,452 INFO L256 TraceCheckSpWp]: Trace formula consists of 3181 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-07 00:41:34,456 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:41:34,520 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-07 00:41:34,520 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:41:34,794 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-07 00:41:34,795 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:41:34,795 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 10 [2019-11-07 00:41:34,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379096023] [2019-11-07 00:41:34,796 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-07 00:41:34,796 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:41:34,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-07 00:41:34,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-11-07 00:41:34,797 INFO L87 Difference]: Start difference. First operand 709 states and 1106 transitions. Second operand 8 states. [2019-11-07 00:41:34,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:41:34,915 INFO L93 Difference]: Finished difference Result 1264 states and 1997 transitions. [2019-11-07 00:41:34,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:41:34,916 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 131 [2019-11-07 00:41:34,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:41:34,920 INFO L225 Difference]: With dead ends: 1264 [2019-11-07 00:41:34,920 INFO L226 Difference]: Without dead ends: 723 [2019-11-07 00:41:34,923 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 253 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2019-11-07 00:41:34,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2019-11-07 00:41:34,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 716. [2019-11-07 00:41:34,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 716 states. [2019-11-07 00:41:34,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1117 transitions. [2019-11-07 00:41:34,956 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1117 transitions. Word has length 131 [2019-11-07 00:41:34,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:41:34,957 INFO L462 AbstractCegarLoop]: Abstraction has 716 states and 1117 transitions. [2019-11-07 00:41:34,957 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-07 00:41:34,957 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1117 transitions. [2019-11-07 00:41:34,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-11-07 00:41:34,959 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:41:34,959 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:41:35,166 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:41:35,167 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:41:35,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:41:35,168 INFO L82 PathProgramCache]: Analyzing trace with hash 1417743562, now seen corresponding path program 1 times [2019-11-07 00:41:35,168 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:41:35,168 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089905305] [2019-11-07 00:41:35,169 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:41:35,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:35,253 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-07 00:41:35,253 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089905305] [2019-11-07 00:41:35,253 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236852671] [2019-11-07 00:41:35,253 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:41:36,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:36,111 INFO L256 TraceCheckSpWp]: Trace formula consists of 3177 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-07 00:41:36,114 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:41:36,186 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-07 00:41:36,186 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:41:36,503 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 00:41:36,621 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-07 00:41:36,621 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:41:36,621 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [4] total 16 [2019-11-07 00:41:36,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415763180] [2019-11-07 00:41:36,622 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-07 00:41:36,622 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:41:36,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-07 00:41:36,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2019-11-07 00:41:36,623 INFO L87 Difference]: Start difference. First operand 716 states and 1117 transitions. Second operand 14 states. [2019-11-07 00:41:36,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:41:36,910 INFO L93 Difference]: Finished difference Result 1265 states and 1997 transitions. [2019-11-07 00:41:36,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-07 00:41:36,910 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 131 [2019-11-07 00:41:36,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:41:36,915 INFO L225 Difference]: With dead ends: 1265 [2019-11-07 00:41:36,915 INFO L226 Difference]: Without dead ends: 724 [2019-11-07 00:41:36,921 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 248 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2019-11-07 00:41:36,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2019-11-07 00:41:36,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 716. [2019-11-07 00:41:36,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 716 states. [2019-11-07 00:41:36,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1117 transitions. [2019-11-07 00:41:36,953 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1117 transitions. Word has length 131 [2019-11-07 00:41:36,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:41:36,953 INFO L462 AbstractCegarLoop]: Abstraction has 716 states and 1117 transitions. [2019-11-07 00:41:36,953 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-07 00:41:36,953 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1117 transitions. [2019-11-07 00:41:36,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-11-07 00:41:36,957 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:41:36,957 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:41:37,166 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:41:37,166 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:41:37,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:41:37,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1260335984, now seen corresponding path program 1 times [2019-11-07 00:41:37,167 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:41:37,167 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609425593] [2019-11-07 00:41:37,167 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:41:37,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:37,272 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-07 00:41:37,272 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609425593] [2019-11-07 00:41:37,273 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536578451] [2019-11-07 00:41:37,273 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:41:38,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:38,272 INFO L256 TraceCheckSpWp]: Trace formula consists of 3183 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:41:38,281 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:41:38,317 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 00:41:38,317 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:41:38,587 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:41:38,587 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:41:38,588 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-11-07 00:41:38,588 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123414179] [2019-11-07 00:41:38,588 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:41:38,588 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:41:38,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:41:38,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:41:38,589 INFO L87 Difference]: Start difference. First operand 716 states and 1117 transitions. Second operand 4 states. [2019-11-07 00:41:38,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:41:38,773 INFO L93 Difference]: Finished difference Result 1351 states and 2131 transitions. [2019-11-07 00:41:38,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:41:38,773 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 133 [2019-11-07 00:41:38,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:41:38,778 INFO L225 Difference]: With dead ends: 1351 [2019-11-07 00:41:38,779 INFO L226 Difference]: Without dead ends: 716 [2019-11-07 00:41:38,786 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 262 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:41:38,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2019-11-07 00:41:38,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 716. [2019-11-07 00:41:38,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 716 states. [2019-11-07 00:41:38,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1112 transitions. [2019-11-07 00:41:38,821 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1112 transitions. Word has length 133 [2019-11-07 00:41:38,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:41:38,821 INFO L462 AbstractCegarLoop]: Abstraction has 716 states and 1112 transitions. [2019-11-07 00:41:38,821 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:41:38,821 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1112 transitions. [2019-11-07 00:41:38,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-11-07 00:41:38,824 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:41:38,824 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:41:39,031 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:41:39,032 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:41:39,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:41:39,032 INFO L82 PathProgramCache]: Analyzing trace with hash 399075328, now seen corresponding path program 1 times [2019-11-07 00:41:39,032 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:41:39,032 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608468122] [2019-11-07 00:41:39,032 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:41:39,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:39,118 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-07 00:41:39,118 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608468122] [2019-11-07 00:41:39,118 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139022929] [2019-11-07 00:41:39,118 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:41:39,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:39,821 INFO L256 TraceCheckSpWp]: Trace formula consists of 3178 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-07 00:41:39,826 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:41:39,892 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-07 00:41:39,892 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:41:40,204 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 00:41:40,297 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-07 00:41:40,297 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:41:40,297 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [4] total 13 [2019-11-07 00:41:40,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771869948] [2019-11-07 00:41:40,298 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-07 00:41:40,298 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:41:40,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-07 00:41:40,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2019-11-07 00:41:40,299 INFO L87 Difference]: Start difference. First operand 716 states and 1112 transitions. Second operand 11 states. [2019-11-07 00:41:40,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:41:40,498 INFO L93 Difference]: Finished difference Result 1266 states and 2000 transitions. [2019-11-07 00:41:40,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-07 00:41:40,499 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 132 [2019-11-07 00:41:40,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:41:40,503 INFO L225 Difference]: With dead ends: 1266 [2019-11-07 00:41:40,504 INFO L226 Difference]: Without dead ends: 725 [2019-11-07 00:41:40,507 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 251 SyntacticMatches, 7 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2019-11-07 00:41:40,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2019-11-07 00:41:40,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 718. [2019-11-07 00:41:40,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 718 states. [2019-11-07 00:41:40,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 1118 transitions. [2019-11-07 00:41:40,530 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 1118 transitions. Word has length 132 [2019-11-07 00:41:40,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:41:40,530 INFO L462 AbstractCegarLoop]: Abstraction has 718 states and 1118 transitions. [2019-11-07 00:41:40,530 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-07 00:41:40,530 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 1118 transitions. [2019-11-07 00:41:40,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-11-07 00:41:40,533 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:41:40,533 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:41:40,741 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:41:40,741 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:41:40,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:41:40,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1558329253, now seen corresponding path program 1 times [2019-11-07 00:41:40,742 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:41:40,742 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132109382] [2019-11-07 00:41:40,742 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:41:40,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:40,825 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-07 00:41:40,825 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132109382] [2019-11-07 00:41:40,826 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147294396] [2019-11-07 00:41:40,826 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:41:41,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:41,632 INFO L256 TraceCheckSpWp]: Trace formula consists of 3179 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-07 00:41:41,636 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:41:41,683 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-07 00:41:41,683 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:41:41,885 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 00:41:41,978 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-07 00:41:41,978 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:41:41,979 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [4] total 11 [2019-11-07 00:41:41,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589620767] [2019-11-07 00:41:41,981 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-07 00:41:41,982 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:41:41,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-07 00:41:41,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2019-11-07 00:41:41,982 INFO L87 Difference]: Start difference. First operand 718 states and 1118 transitions. Second operand 9 states. [2019-11-07 00:41:42,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:41:42,110 INFO L93 Difference]: Finished difference Result 1362 states and 2165 transitions. [2019-11-07 00:41:42,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:41:42,117 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 133 [2019-11-07 00:41:42,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:41:42,121 INFO L225 Difference]: With dead ends: 1362 [2019-11-07 00:41:42,122 INFO L226 Difference]: Without dead ends: 727 [2019-11-07 00:41:42,125 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 260 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2019-11-07 00:41:42,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 727 states. [2019-11-07 00:41:42,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 727 to 725. [2019-11-07 00:41:42,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 725 states. [2019-11-07 00:41:42,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 725 states to 725 states and 1126 transitions. [2019-11-07 00:41:42,148 INFO L78 Accepts]: Start accepts. Automaton has 725 states and 1126 transitions. Word has length 133 [2019-11-07 00:41:42,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:41:42,148 INFO L462 AbstractCegarLoop]: Abstraction has 725 states and 1126 transitions. [2019-11-07 00:41:42,148 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-07 00:41:42,148 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states and 1126 transitions. [2019-11-07 00:41:42,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-11-07 00:41:42,151 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:41:42,151 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:41:42,367 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:41:42,367 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:41:42,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:41:42,368 INFO L82 PathProgramCache]: Analyzing trace with hash 266659145, now seen corresponding path program 1 times [2019-11-07 00:41:42,368 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:41:42,369 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454810476] [2019-11-07 00:41:42,369 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:41:42,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:42,451 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-07 00:41:42,451 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454810476] [2019-11-07 00:41:42,451 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760587458] [2019-11-07 00:41:42,452 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:41:43,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:43,161 INFO L256 TraceCheckSpWp]: Trace formula consists of 3186 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-07 00:41:43,164 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:41:43,194 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-07 00:41:43,195 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:41:43,400 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 00:41:43,463 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-07 00:41:43,464 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:41:43,464 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [4] total 10 [2019-11-07 00:41:43,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201431663] [2019-11-07 00:41:43,465 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-07 00:41:43,465 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:41:43,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-07 00:41:43,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-11-07 00:41:43,465 INFO L87 Difference]: Start difference. First operand 725 states and 1126 transitions. Second operand 8 states. [2019-11-07 00:41:43,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:41:43,582 INFO L93 Difference]: Finished difference Result 1376 states and 2176 transitions. [2019-11-07 00:41:43,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 00:41:43,583 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 136 [2019-11-07 00:41:43,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:41:43,587 INFO L225 Difference]: With dead ends: 1376 [2019-11-07 00:41:43,588 INFO L226 Difference]: Without dead ends: 734 [2019-11-07 00:41:43,591 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 266 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2019-11-07 00:41:43,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2019-11-07 00:41:43,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 729. [2019-11-07 00:41:43,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 729 states. [2019-11-07 00:41:43,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 729 states to 729 states and 1132 transitions. [2019-11-07 00:41:43,611 INFO L78 Accepts]: Start accepts. Automaton has 729 states and 1132 transitions. Word has length 136 [2019-11-07 00:41:43,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:41:43,612 INFO L462 AbstractCegarLoop]: Abstraction has 729 states and 1132 transitions. [2019-11-07 00:41:43,612 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-07 00:41:43,612 INFO L276 IsEmpty]: Start isEmpty. Operand 729 states and 1132 transitions. [2019-11-07 00:41:43,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-11-07 00:41:43,615 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:41:43,615 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:41:43,823 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:41:43,823 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:41:43,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:41:43,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1900496898, now seen corresponding path program 1 times [2019-11-07 00:41:43,823 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:41:43,824 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374906592] [2019-11-07 00:41:43,824 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:41:43,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:43,912 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-07 00:41:43,913 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374906592] [2019-11-07 00:41:43,913 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415255399] [2019-11-07 00:41:43,913 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true