java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/product-lines/elevator_spec1_product31.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:09:20,455 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:09:20,458 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:09:20,477 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:09:20,477 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:09:20,478 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:09:20,480 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:09:20,481 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:09:20,485 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:09:20,486 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:09:20,490 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:09:20,491 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:09:20,493 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:09:20,494 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:09:20,495 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:09:20,496 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:09:20,497 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:09:20,498 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:09:20,500 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:09:20,501 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:09:20,503 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:09:20,504 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:09:20,505 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:09:20,505 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:09:20,508 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 01:09:20,508 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 01:09:20,508 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 01:09:20,509 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 01:09:20,509 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 01:09:20,510 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 01:09:20,510 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 01:09:20,511 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 01:09:20,512 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 01:09:20,512 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 01:09:20,513 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 01:09:20,514 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 01:09:20,514 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 01:09:20,514 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 01:09:20,515 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:09:20,515 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:09:20,516 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:09:20,517 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 01:09:20,531 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:09:20,531 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:09:20,532 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:09:20,533 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:09:20,533 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:09:20,533 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:09:20,533 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:09:20,533 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:09:20,534 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:09:20,534 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:09:20,534 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:09:20,534 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:09:20,534 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:09:20,535 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:09:20,535 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:09:20,535 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:09:20,535 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:09:20,535 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:09:20,536 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:09:20,536 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:09:20,536 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:09:20,536 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:09:20,536 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:09:20,537 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:09:20,537 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:09:20,537 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:09:20,537 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:09:20,537 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:09:20,538 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-15 01:09:20,803 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:09:20,817 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:09:20,823 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:09:20,824 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:09:20,824 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:09:20,825 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec1_product31.cil.c [2019-10-15 01:09:20,900 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5104ca00/c8fa170e80d24197bd1fd2767555f48c/FLAG995e832c7 [2019-10-15 01:09:21,603 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:09:21,607 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec1_product31.cil.c [2019-10-15 01:09:21,638 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5104ca00/c8fa170e80d24197bd1fd2767555f48c/FLAG995e832c7 [2019-10-15 01:09:21,759 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5104ca00/c8fa170e80d24197bd1fd2767555f48c [2019-10-15 01:09:21,767 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:09:21,769 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:09:21,770 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:09:21,770 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:09:21,773 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:09:21,774 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:09:21" (1/1) ... [2019-10-15 01:09:21,777 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ee9cbb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:09:21, skipping insertion in model container [2019-10-15 01:09:21,778 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:09:21" (1/1) ... [2019-10-15 01:09:21,783 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:09:21,854 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:09:22,573 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:09:22,599 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:09:22,789 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:09:22,864 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:09:22,865 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:09:22 WrapperNode [2019-10-15 01:09:22,865 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:09:22,866 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:09:22,866 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:09:22,866 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:09:22,880 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:09:22" (1/1) ... [2019-10-15 01:09:22,880 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:09:22" (1/1) ... [2019-10-15 01:09:22,914 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:09:22" (1/1) ... [2019-10-15 01:09:22,915 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:09:22" (1/1) ... [2019-10-15 01:09:22,981 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:09:22" (1/1) ... [2019-10-15 01:09:23,019 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:09:22" (1/1) ... [2019-10-15 01:09:23,040 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:09:22" (1/1) ... [2019-10-15 01:09:23,057 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:09:23,058 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:09:23,058 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:09:23,058 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:09:23,059 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:09:22" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:09:23,123 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:09:23,123 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:09:23,123 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-15 01:09:23,124 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-15 01:09:23,124 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-15 01:09:23,124 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-15 01:09:23,124 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-15 01:09:23,124 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-15 01:09:23,125 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-15 01:09:23,125 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-15 01:09:23,125 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-10-15 01:09:23,125 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-10-15 01:09:23,126 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-10-15 01:09:23,126 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-10-15 01:09:23,126 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-10-15 01:09:23,126 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-10-15 01:09:23,127 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__weight [2019-10-15 01:09:23,127 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-10-15 01:09:23,127 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-10-15 01:09:23,127 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-10-15 01:09:23,127 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-10-15 01:09:23,128 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-10-15 01:09:23,129 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-10-15 01:09:23,129 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-10-15 01:09:23,129 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-10-15 01:09:23,129 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-10-15 01:09:23,129 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-10-15 01:09:23,130 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2019-10-15 01:09:23,130 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__twothirdsfull [2019-10-15 01:09:23,130 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-10-15 01:09:23,130 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-10-15 01:09:23,130 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-10-15 01:09:23,131 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-10-15 01:09:23,131 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2019-10-15 01:09:23,131 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-10-15 01:09:23,132 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-10-15 01:09:23,132 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-10-15 01:09:23,132 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-15 01:09:23,132 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-10-15 01:09:23,132 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-10-15 01:09:23,132 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2019-10-15 01:09:23,133 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloor [2019-10-15 01:09:23,133 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-10-15 01:09:23,134 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-10-15 01:09:23,134 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-15 01:09:23,134 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-10-15 01:09:23,134 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-10-15 01:09:23,134 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-10-15 01:09:23,134 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2019-10-15 01:09:23,135 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__2 [2019-10-15 01:09:23,135 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__3 [2019-10-15 01:09:23,135 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__4 [2019-10-15 01:09:23,135 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-10-15 01:09:23,135 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-10-15 01:09:23,135 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-10-15 01:09:23,136 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-10-15 01:09:23,136 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-10-15 01:09:23,136 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-10-15 01:09:23,136 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-10-15 01:09:23,136 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-10-15 01:09:23,137 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-15 01:09:23,137 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-10-15 01:09:23,137 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-10-15 01:09:23,138 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-10-15 01:09:23,138 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-15 01:09:23,138 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-10-15 01:09:23,138 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-15 01:09:23,139 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-15 01:09:23,139 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:09:23,139 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-10-15 01:09:23,139 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-10-15 01:09:23,139 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-10-15 01:09:23,140 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-10-15 01:09:23,140 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-10-15 01:09:23,141 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-10-15 01:09:23,141 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-10-15 01:09:23,141 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-10-15 01:09:23,141 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-15 01:09:23,141 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-15 01:09:23,142 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-15 01:09:23,143 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-15 01:09:23,143 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:09:23,143 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:09:23,143 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-15 01:09:23,144 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-15 01:09:23,144 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-15 01:09:23,145 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-15 01:09:23,146 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-15 01:09:23,146 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-15 01:09:23,146 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:09:23,147 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-15 01:09:23,147 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-15 01:09:23,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:09:23,147 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-15 01:09:23,147 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-15 01:09:23,147 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:09:23,148 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-15 01:09:23,148 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-15 01:09:23,148 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:09:23,148 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-15 01:09:23,148 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-15 01:09:23,149 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-15 01:09:23,149 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-10-15 01:09:23,149 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-10-15 01:09:23,149 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-10-15 01:09:23,149 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-10-15 01:09:23,150 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-10-15 01:09:23,150 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-10-15 01:09:23,150 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-10-15 01:09:23,150 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-10-15 01:09:23,150 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-10-15 01:09:23,150 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-15 01:09:23,151 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-10-15 01:09:23,151 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-10-15 01:09:23,151 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-10-15 01:09:23,151 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-10-15 01:09:23,151 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-10-15 01:09:23,152 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-10-15 01:09:23,152 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-10-15 01:09:23,152 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-10-15 01:09:23,153 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-10-15 01:09:23,153 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-10-15 01:09:23,153 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2019-10-15 01:09:23,153 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloor [2019-10-15 01:09:23,155 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-10-15 01:09:23,155 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-10-15 01:09:23,155 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__weight [2019-10-15 01:09:23,155 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-10-15 01:09:23,156 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-10-15 01:09:23,156 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-10-15 01:09:23,156 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-10-15 01:09:23,156 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-10-15 01:09:23,157 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2019-10-15 01:09:23,157 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__twothirdsfull [2019-10-15 01:09:23,157 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-10-15 01:09:23,157 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-10-15 01:09:23,158 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-10-15 01:09:23,161 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2019-10-15 01:09:23,162 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-10-15 01:09:23,162 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-10-15 01:09:23,162 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-10-15 01:09:23,163 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__3 [2019-10-15 01:09:23,163 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-10-15 01:09:23,163 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-10-15 01:09:23,171 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-10-15 01:09:23,171 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-10-15 01:09:23,171 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-10-15 01:09:23,171 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-10-15 01:09:23,171 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-10-15 01:09:23,171 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-15 01:09:23,171 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-15 01:09:23,172 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2019-10-15 01:09:23,172 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__2 [2019-10-15 01:09:23,172 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__4 [2019-10-15 01:09:23,172 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:09:23,172 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-10-15 01:09:23,172 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-10-15 01:09:23,172 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-10-15 01:09:23,172 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-10-15 01:09:23,173 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-10-15 01:09:23,173 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-10-15 01:09:23,173 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-10-15 01:09:23,173 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-10-15 01:09:23,174 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-10-15 01:09:23,174 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-15 01:09:23,174 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-10-15 01:09:23,174 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-15 01:09:23,175 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-15 01:09:23,175 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-15 01:09:23,175 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-15 01:09:23,175 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-15 01:09:23,175 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:09:23,175 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-10-15 01:09:23,175 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-15 01:09:23,175 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:09:23,176 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-15 01:09:23,176 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:09:25,560 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:09:25,560 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-15 01:09:25,562 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:09:25 BoogieIcfgContainer [2019-10-15 01:09:25,563 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:09:25,564 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:09:25,564 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:09:25,567 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:09:25,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:09:21" (1/3) ... [2019-10-15 01:09:25,568 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3daa09cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:09:25, skipping insertion in model container [2019-10-15 01:09:25,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:09:22" (2/3) ... [2019-10-15 01:09:25,569 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3daa09cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:09:25, skipping insertion in model container [2019-10-15 01:09:25,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:09:25" (3/3) ... [2019-10-15 01:09:25,571 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product31.cil.c [2019-10-15 01:09:25,581 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:09:25,591 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:09:25,603 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:09:25,650 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:09:25,650 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:09:25,650 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:09:25,651 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:09:25,651 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:09:25,651 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:09:25,651 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:09:25,651 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:09:25,689 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states. [2019-10-15 01:09:25,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2019-10-15 01:09:25,739 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:25,741 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:25,744 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:25,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:25,752 INFO L82 PathProgramCache]: Analyzing trace with hash 2056996634, now seen corresponding path program 1 times [2019-10-15 01:09:25,764 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:25,765 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887923510] [2019-10-15 01:09:25,765 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:25,765 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:25,766 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:26,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:26,479 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-15 01:09:26,480 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887923510] [2019-10-15 01:09:26,481 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806515803] [2019-10-15 01:09:26,481 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:27,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:27,255 INFO L256 TraceCheckSpWp]: Trace formula consists of 3286 conjuncts, 1 conjunts are in the unsatisfiable core [2019-10-15 01:09:27,287 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:27,350 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-15 01:09:27,350 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:27,742 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-15 01:09:27,743 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:09:27,743 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [4] total 4 [2019-10-15 01:09:27,743 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870191739] [2019-10-15 01:09:27,750 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-15 01:09:27,752 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:27,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-15 01:09:27,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:09:27,769 INFO L87 Difference]: Start difference. First operand 818 states. Second operand 2 states. [2019-10-15 01:09:27,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:27,847 INFO L93 Difference]: Finished difference Result 701 states and 1104 transitions. [2019-10-15 01:09:27,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-15 01:09:27,848 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 164 [2019-10-15 01:09:27,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:27,891 INFO L225 Difference]: With dead ends: 701 [2019-10-15 01:09:27,891 INFO L226 Difference]: Without dead ends: 664 [2019-10-15 01:09:27,897 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:09:27,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2019-10-15 01:09:28,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 664. [2019-10-15 01:09:28,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 664 states. [2019-10-15 01:09:28,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 1049 transitions. [2019-10-15 01:09:28,023 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 1049 transitions. Word has length 164 [2019-10-15 01:09:28,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:28,026 INFO L462 AbstractCegarLoop]: Abstraction has 664 states and 1049 transitions. [2019-10-15 01:09:28,026 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-15 01:09:28,026 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 1049 transitions. [2019-10-15 01:09:28,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-10-15 01:09:28,036 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:28,036 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:28,245 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:28,246 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:28,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:28,247 INFO L82 PathProgramCache]: Analyzing trace with hash 483003241, now seen corresponding path program 1 times [2019-10-15 01:09:28,247 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:28,248 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925201992] [2019-10-15 01:09:28,248 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:28,248 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:28,249 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:28,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:28,463 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-15 01:09:28,464 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925201992] [2019-10-15 01:09:28,464 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978825787] [2019-10-15 01:09:28,464 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:29,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:29,087 INFO L256 TraceCheckSpWp]: Trace formula consists of 3289 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:29,096 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:29,131 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-10-15 01:09:29,131 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:29,406 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-15 01:09:29,406 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:09:29,407 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 5 [2019-10-15 01:09:29,407 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912307829] [2019-10-15 01:09:29,409 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:09:29,409 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:29,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:09:29,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:09:29,410 INFO L87 Difference]: Start difference. First operand 664 states and 1049 transitions. Second operand 3 states. [2019-10-15 01:09:29,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:29,582 INFO L93 Difference]: Finished difference Result 1769 states and 2830 transitions. [2019-10-15 01:09:29,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:09:29,582 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 166 [2019-10-15 01:09:29,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:29,596 INFO L225 Difference]: With dead ends: 1769 [2019-10-15 01:09:29,596 INFO L226 Difference]: Without dead ends: 1214 [2019-10-15 01:09:29,608 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:09:29,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1214 states. [2019-10-15 01:09:29,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1214 to 1192. [2019-10-15 01:09:29,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1192 states. [2019-10-15 01:09:29,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1192 states to 1192 states and 1903 transitions. [2019-10-15 01:09:29,779 INFO L78 Accepts]: Start accepts. Automaton has 1192 states and 1903 transitions. Word has length 166 [2019-10-15 01:09:29,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:29,782 INFO L462 AbstractCegarLoop]: Abstraction has 1192 states and 1903 transitions. [2019-10-15 01:09:29,782 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:09:29,782 INFO L276 IsEmpty]: Start isEmpty. Operand 1192 states and 1903 transitions. [2019-10-15 01:09:29,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-10-15 01:09:29,793 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:29,793 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:30,001 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:30,002 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:30,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:30,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1184603115, now seen corresponding path program 1 times [2019-10-15 01:09:30,003 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:30,003 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897679972] [2019-10-15 01:09:30,004 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:30,004 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:30,004 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:30,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:30,139 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-15 01:09:30,140 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897679972] [2019-10-15 01:09:30,140 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761057202] [2019-10-15 01:09:30,141 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:30,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:30,737 INFO L256 TraceCheckSpWp]: Trace formula consists of 3288 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:30,744 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:30,804 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-15 01:09:30,805 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:31,063 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-15 01:09:31,064 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:31,064 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-15 01:09:31,064 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25710954] [2019-10-15 01:09:31,065 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:31,065 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:31,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:31,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:09:31,066 INFO L87 Difference]: Start difference. First operand 1192 states and 1903 transitions. Second operand 4 states. [2019-10-15 01:09:31,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:31,173 INFO L93 Difference]: Finished difference Result 2356 states and 3779 transitions. [2019-10-15 01:09:31,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:09:31,173 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 166 [2019-10-15 01:09:31,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:31,183 INFO L225 Difference]: With dead ends: 2356 [2019-10-15 01:09:31,183 INFO L226 Difference]: Without dead ends: 1192 [2019-10-15 01:09:31,189 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 328 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:09:31,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1192 states. [2019-10-15 01:09:31,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1192 to 1192. [2019-10-15 01:09:31,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1192 states. [2019-10-15 01:09:31,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1192 states to 1192 states and 1902 transitions. [2019-10-15 01:09:31,265 INFO L78 Accepts]: Start accepts. Automaton has 1192 states and 1902 transitions. Word has length 166 [2019-10-15 01:09:31,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:31,266 INFO L462 AbstractCegarLoop]: Abstraction has 1192 states and 1902 transitions. [2019-10-15 01:09:31,266 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:31,266 INFO L276 IsEmpty]: Start isEmpty. Operand 1192 states and 1902 transitions. [2019-10-15 01:09:31,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2019-10-15 01:09:31,272 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:31,273 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:31,481 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:31,481 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:31,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:31,482 INFO L82 PathProgramCache]: Analyzing trace with hash 186796567, now seen corresponding path program 1 times [2019-10-15 01:09:31,482 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:31,482 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236278803] [2019-10-15 01:09:31,482 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:31,483 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:31,483 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:31,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:31,622 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-15 01:09:31,623 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236278803] [2019-10-15 01:09:31,623 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446501789] [2019-10-15 01:09:31,624 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:32,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:32,262 INFO L256 TraceCheckSpWp]: Trace formula consists of 3290 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:32,268 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:32,295 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-15 01:09:32,295 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:32,540 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-15 01:09:32,540 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:32,540 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-15 01:09:32,540 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544639387] [2019-10-15 01:09:32,541 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:32,541 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:32,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:32,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:09:32,542 INFO L87 Difference]: Start difference. First operand 1192 states and 1902 transitions. Second operand 4 states. [2019-10-15 01:09:32,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:32,646 INFO L93 Difference]: Finished difference Result 2356 states and 3777 transitions. [2019-10-15 01:09:32,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:09:32,647 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 168 [2019-10-15 01:09:32,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:32,657 INFO L225 Difference]: With dead ends: 2356 [2019-10-15 01:09:32,657 INFO L226 Difference]: Without dead ends: 1192 [2019-10-15 01:09:32,664 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 332 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:09:32,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1192 states. [2019-10-15 01:09:32,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1192 to 1192. [2019-10-15 01:09:32,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1192 states. [2019-10-15 01:09:32,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1192 states to 1192 states and 1901 transitions. [2019-10-15 01:09:32,722 INFO L78 Accepts]: Start accepts. Automaton has 1192 states and 1901 transitions. Word has length 168 [2019-10-15 01:09:32,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:32,723 INFO L462 AbstractCegarLoop]: Abstraction has 1192 states and 1901 transitions. [2019-10-15 01:09:32,723 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:32,723 INFO L276 IsEmpty]: Start isEmpty. Operand 1192 states and 1901 transitions. [2019-10-15 01:09:32,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2019-10-15 01:09:32,730 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:32,731 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:32,942 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:32,942 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:32,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:32,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1415839309, now seen corresponding path program 1 times [2019-10-15 01:09:32,943 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:32,943 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32481658] [2019-10-15 01:09:32,943 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:32,943 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:32,944 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:33,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:33,122 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-15 01:09:33,123 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32481658] [2019-10-15 01:09:33,123 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345059274] [2019-10-15 01:09:33,123 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:33,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:33,695 INFO L256 TraceCheckSpWp]: Trace formula consists of 3292 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:33,702 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:33,735 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-15 01:09:33,735 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:34,048 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-15 01:09:34,048 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:34,049 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-15 01:09:34,049 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950175616] [2019-10-15 01:09:34,050 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:34,050 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:34,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:34,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:09:34,051 INFO L87 Difference]: Start difference. First operand 1192 states and 1901 transitions. Second operand 4 states. [2019-10-15 01:09:34,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:34,157 INFO L93 Difference]: Finished difference Result 2363 states and 3784 transitions. [2019-10-15 01:09:34,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:09:34,158 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 170 [2019-10-15 01:09:34,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:34,168 INFO L225 Difference]: With dead ends: 2363 [2019-10-15 01:09:34,169 INFO L226 Difference]: Without dead ends: 1201 [2019-10-15 01:09:34,176 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 336 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:09:34,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2019-10-15 01:09:34,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 1201. [2019-10-15 01:09:34,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1201 states. [2019-10-15 01:09:34,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1201 states to 1201 states and 1913 transitions. [2019-10-15 01:09:34,274 INFO L78 Accepts]: Start accepts. Automaton has 1201 states and 1913 transitions. Word has length 170 [2019-10-15 01:09:34,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:34,275 INFO L462 AbstractCegarLoop]: Abstraction has 1201 states and 1913 transitions. [2019-10-15 01:09:34,275 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:34,275 INFO L276 IsEmpty]: Start isEmpty. Operand 1201 states and 1913 transitions. [2019-10-15 01:09:34,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-10-15 01:09:34,281 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:34,282 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:34,498 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:34,498 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:34,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:34,499 INFO L82 PathProgramCache]: Analyzing trace with hash 941734220, now seen corresponding path program 1 times [2019-10-15 01:09:34,499 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:34,499 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449966203] [2019-10-15 01:09:34,500 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:34,500 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:34,500 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:34,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:34,699 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-15 01:09:34,699 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449966203] [2019-10-15 01:09:34,699 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835648494] [2019-10-15 01:09:34,700 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:35,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:35,353 INFO L256 TraceCheckSpWp]: Trace formula consists of 3293 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:35,357 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:35,389 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-15 01:09:35,390 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:35,800 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-15 01:09:35,800 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:35,800 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-15 01:09:35,800 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077869115] [2019-10-15 01:09:35,801 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:35,801 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:35,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:35,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:09:35,802 INFO L87 Difference]: Start difference. First operand 1201 states and 1913 transitions. Second operand 4 states. [2019-10-15 01:09:35,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:35,958 INFO L93 Difference]: Finished difference Result 2365 states and 3785 transitions. [2019-10-15 01:09:35,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:09:35,958 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 171 [2019-10-15 01:09:35,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:35,968 INFO L225 Difference]: With dead ends: 2365 [2019-10-15 01:09:35,968 INFO L226 Difference]: Without dead ends: 1201 [2019-10-15 01:09:35,975 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 338 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:09:35,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2019-10-15 01:09:36,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 1201. [2019-10-15 01:09:36,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1201 states. [2019-10-15 01:09:36,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1201 states to 1201 states and 1912 transitions. [2019-10-15 01:09:36,024 INFO L78 Accepts]: Start accepts. Automaton has 1201 states and 1912 transitions. Word has length 171 [2019-10-15 01:09:36,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:36,025 INFO L462 AbstractCegarLoop]: Abstraction has 1201 states and 1912 transitions. [2019-10-15 01:09:36,025 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:36,025 INFO L276 IsEmpty]: Start isEmpty. Operand 1201 states and 1912 transitions. [2019-10-15 01:09:36,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2019-10-15 01:09:36,031 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:36,032 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:36,240 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:36,240 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:36,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:36,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1151365335, now seen corresponding path program 1 times [2019-10-15 01:09:36,241 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:36,242 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273112642] [2019-10-15 01:09:36,242 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:36,242 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:36,243 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:36,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:36,371 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-15 01:09:36,371 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273112642] [2019-10-15 01:09:36,372 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223051411] [2019-10-15 01:09:36,372 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:37,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:37,140 INFO L256 TraceCheckSpWp]: Trace formula consists of 3294 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:37,146 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:37,180 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-15 01:09:37,180 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:37,466 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-15 01:09:37,467 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:37,467 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-15 01:09:37,467 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873533626] [2019-10-15 01:09:37,468 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:37,468 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:37,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:37,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:09:37,469 INFO L87 Difference]: Start difference. First operand 1201 states and 1912 transitions. Second operand 4 states. [2019-10-15 01:09:37,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:37,578 INFO L93 Difference]: Finished difference Result 2365 states and 3784 transitions. [2019-10-15 01:09:37,579 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:09:37,579 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 172 [2019-10-15 01:09:37,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:37,589 INFO L225 Difference]: With dead ends: 2365 [2019-10-15 01:09:37,590 INFO L226 Difference]: Without dead ends: 1201 [2019-10-15 01:09:37,597 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 340 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:09:37,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2019-10-15 01:09:37,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 1201. [2019-10-15 01:09:37,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1201 states. [2019-10-15 01:09:37,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1201 states to 1201 states and 1911 transitions. [2019-10-15 01:09:37,653 INFO L78 Accepts]: Start accepts. Automaton has 1201 states and 1911 transitions. Word has length 172 [2019-10-15 01:09:37,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:37,653 INFO L462 AbstractCegarLoop]: Abstraction has 1201 states and 1911 transitions. [2019-10-15 01:09:37,653 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:37,654 INFO L276 IsEmpty]: Start isEmpty. Operand 1201 states and 1911 transitions. [2019-10-15 01:09:37,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2019-10-15 01:09:37,660 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:37,661 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:37,869 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:37,870 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:37,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:37,870 INFO L82 PathProgramCache]: Analyzing trace with hash -800708944, now seen corresponding path program 1 times [2019-10-15 01:09:37,870 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:37,871 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510427890] [2019-10-15 01:09:37,871 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:37,871 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:37,871 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:37,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:38,121 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-15 01:09:38,122 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510427890] [2019-10-15 01:09:38,126 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211349898] [2019-10-15 01:09:38,126 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:38,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:38,833 INFO L256 TraceCheckSpWp]: Trace formula consists of 3295 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:09:38,844 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:38,926 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-15 01:09:38,926 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:39,329 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-15 01:09:39,330 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:39,330 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10, 7] total 16 [2019-10-15 01:09:39,330 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688461853] [2019-10-15 01:09:39,331 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-15 01:09:39,331 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:39,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-15 01:09:39,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2019-10-15 01:09:39,332 INFO L87 Difference]: Start difference. First operand 1201 states and 1911 transitions. Second operand 7 states. [2019-10-15 01:09:39,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:39,497 INFO L93 Difference]: Finished difference Result 2372 states and 3793 transitions. [2019-10-15 01:09:39,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:09:39,497 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 173 [2019-10-15 01:09:39,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:39,509 INFO L225 Difference]: With dead ends: 2372 [2019-10-15 01:09:39,509 INFO L226 Difference]: Without dead ends: 1212 [2019-10-15 01:09:39,514 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 338 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2019-10-15 01:09:39,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1212 states. [2019-10-15 01:09:39,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1212 to 1208. [2019-10-15 01:09:39,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1208 states. [2019-10-15 01:09:39,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1208 states to 1208 states and 1921 transitions. [2019-10-15 01:09:39,569 INFO L78 Accepts]: Start accepts. Automaton has 1208 states and 1921 transitions. Word has length 173 [2019-10-15 01:09:39,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:39,569 INFO L462 AbstractCegarLoop]: Abstraction has 1208 states and 1921 transitions. [2019-10-15 01:09:39,569 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-15 01:09:39,570 INFO L276 IsEmpty]: Start isEmpty. Operand 1208 states and 1921 transitions. [2019-10-15 01:09:39,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2019-10-15 01:09:39,576 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:39,576 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:39,789 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:39,790 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:39,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:39,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1952487394, now seen corresponding path program 1 times [2019-10-15 01:09:39,791 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:39,791 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226650206] [2019-10-15 01:09:39,791 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:39,791 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:39,791 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:39,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:40,050 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2019-10-15 01:09:40,050 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226650206] [2019-10-15 01:09:40,051 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420236671] [2019-10-15 01:09:40,051 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:40,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:40,710 INFO L256 TraceCheckSpWp]: Trace formula consists of 3296 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:40,715 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:40,749 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-15 01:09:40,749 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:41,004 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-15 01:09:41,004 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:41,004 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 10 [2019-10-15 01:09:41,005 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188783850] [2019-10-15 01:09:41,006 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:41,006 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:41,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:41,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-10-15 01:09:41,007 INFO L87 Difference]: Start difference. First operand 1208 states and 1921 transitions. Second operand 4 states. [2019-10-15 01:09:41,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:41,196 INFO L93 Difference]: Finished difference Result 2377 states and 3804 transitions. [2019-10-15 01:09:41,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:09:41,198 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 174 [2019-10-15 01:09:41,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:41,210 INFO L225 Difference]: With dead ends: 2377 [2019-10-15 01:09:41,211 INFO L226 Difference]: Without dead ends: 1208 [2019-10-15 01:09:41,217 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 345 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2019-10-15 01:09:41,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1208 states. [2019-10-15 01:09:41,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1208 to 1208. [2019-10-15 01:09:41,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1208 states. [2019-10-15 01:09:41,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1208 states to 1208 states and 1916 transitions. [2019-10-15 01:09:41,296 INFO L78 Accepts]: Start accepts. Automaton has 1208 states and 1916 transitions. Word has length 174 [2019-10-15 01:09:41,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:41,297 INFO L462 AbstractCegarLoop]: Abstraction has 1208 states and 1916 transitions. [2019-10-15 01:09:41,297 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:41,297 INFO L276 IsEmpty]: Start isEmpty. Operand 1208 states and 1916 transitions. [2019-10-15 01:09:41,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2019-10-15 01:09:41,303 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:41,304 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:41,514 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:41,514 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:41,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:41,515 INFO L82 PathProgramCache]: Analyzing trace with hash 919914375, now seen corresponding path program 1 times [2019-10-15 01:09:41,515 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:41,515 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972651385] [2019-10-15 01:09:41,515 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:41,515 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:41,515 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:41,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:41,655 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-10-15 01:09:41,656 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972651385] [2019-10-15 01:09:41,656 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843138619] [2019-10-15 01:09:41,656 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:42,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:42,467 INFO L256 TraceCheckSpWp]: Trace formula consists of 3296 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:42,479 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:42,512 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-15 01:09:42,512 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:42,772 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-15 01:09:42,772 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:42,773 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-15 01:09:42,773 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572168887] [2019-10-15 01:09:42,773 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:42,774 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:42,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:42,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:09:42,774 INFO L87 Difference]: Start difference. First operand 1208 states and 1916 transitions. Second operand 4 states. [2019-10-15 01:09:42,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:42,943 INFO L93 Difference]: Finished difference Result 2377 states and 3794 transitions. [2019-10-15 01:09:42,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:09:42,944 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 175 [2019-10-15 01:09:42,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:42,953 INFO L225 Difference]: With dead ends: 2377 [2019-10-15 01:09:42,953 INFO L226 Difference]: Without dead ends: 1208 [2019-10-15 01:09:42,960 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 346 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:09:42,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1208 states. [2019-10-15 01:09:42,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1208 to 1208. [2019-10-15 01:09:43,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1208 states. [2019-10-15 01:09:43,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1208 states to 1208 states and 1911 transitions. [2019-10-15 01:09:43,008 INFO L78 Accepts]: Start accepts. Automaton has 1208 states and 1911 transitions. Word has length 175 [2019-10-15 01:09:43,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:43,011 INFO L462 AbstractCegarLoop]: Abstraction has 1208 states and 1911 transitions. [2019-10-15 01:09:43,011 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:43,011 INFO L276 IsEmpty]: Start isEmpty. Operand 1208 states and 1911 transitions. [2019-10-15 01:09:43,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2019-10-15 01:09:43,018 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:43,019 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:43,227 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:43,227 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:43,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:43,228 INFO L82 PathProgramCache]: Analyzing trace with hash -7456040, now seen corresponding path program 1 times [2019-10-15 01:09:43,228 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:43,229 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080304763] [2019-10-15 01:09:43,229 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:43,229 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:43,229 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:43,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:43,372 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2019-10-15 01:09:43,372 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080304763] [2019-10-15 01:09:43,372 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819592044] [2019-10-15 01:09:43,372 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:44,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:44,170 INFO L256 TraceCheckSpWp]: Trace formula consists of 3300 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:44,188 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:44,223 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-15 01:09:44,223 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:44,554 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-15 01:09:44,555 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:44,555 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 10 [2019-10-15 01:09:44,555 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422701352] [2019-10-15 01:09:44,556 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:44,557 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:44,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:44,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-10-15 01:09:44,558 INFO L87 Difference]: Start difference. First operand 1208 states and 1911 transitions. Second operand 4 states. [2019-10-15 01:09:44,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:44,738 INFO L93 Difference]: Finished difference Result 2413 states and 3842 transitions. [2019-10-15 01:09:44,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:09:44,739 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 178 [2019-10-15 01:09:44,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:44,747 INFO L225 Difference]: With dead ends: 2413 [2019-10-15 01:09:44,747 INFO L226 Difference]: Without dead ends: 1250 [2019-10-15 01:09:44,753 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 353 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2019-10-15 01:09:44,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1250 states. [2019-10-15 01:09:44,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1250 to 1247. [2019-10-15 01:09:44,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1247 states. [2019-10-15 01:09:44,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1247 states to 1247 states and 1974 transitions. [2019-10-15 01:09:44,795 INFO L78 Accepts]: Start accepts. Automaton has 1247 states and 1974 transitions. Word has length 178 [2019-10-15 01:09:44,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:44,796 INFO L462 AbstractCegarLoop]: Abstraction has 1247 states and 1974 transitions. [2019-10-15 01:09:44,796 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:44,796 INFO L276 IsEmpty]: Start isEmpty. Operand 1247 states and 1974 transitions. [2019-10-15 01:09:44,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2019-10-15 01:09:44,801 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:44,802 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:45,018 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:45,019 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:45,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:45,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1011817608, now seen corresponding path program 1 times [2019-10-15 01:09:45,019 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:45,030 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647822626] [2019-10-15 01:09:45,031 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:45,031 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:45,034 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:45,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:45,198 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-15 01:09:45,198 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647822626] [2019-10-15 01:09:45,199 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810022268] [2019-10-15 01:09:45,199 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:45,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:45,900 INFO L256 TraceCheckSpWp]: Trace formula consists of 3299 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:45,905 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:45,932 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-15 01:09:45,933 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:46,237 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-15 01:09:46,238 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:46,238 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-15 01:09:46,239 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32062565] [2019-10-15 01:09:46,240 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:46,240 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:46,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:46,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:09:46,241 INFO L87 Difference]: Start difference. First operand 1247 states and 1974 transitions. Second operand 4 states. [2019-10-15 01:09:46,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:46,595 INFO L93 Difference]: Finished difference Result 2413 states and 3840 transitions. [2019-10-15 01:09:46,595 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:09:46,596 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 178 [2019-10-15 01:09:46,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:46,607 INFO L225 Difference]: With dead ends: 2413 [2019-10-15 01:09:46,607 INFO L226 Difference]: Without dead ends: 1247 [2019-10-15 01:09:46,616 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 352 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:09:46,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1247 states. [2019-10-15 01:09:46,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1247 to 1247. [2019-10-15 01:09:46,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1247 states. [2019-10-15 01:09:46,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1247 states to 1247 states and 1969 transitions. [2019-10-15 01:09:46,683 INFO L78 Accepts]: Start accepts. Automaton has 1247 states and 1969 transitions. Word has length 178 [2019-10-15 01:09:46,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:46,683 INFO L462 AbstractCegarLoop]: Abstraction has 1247 states and 1969 transitions. [2019-10-15 01:09:46,684 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:46,684 INFO L276 IsEmpty]: Start isEmpty. Operand 1247 states and 1969 transitions. [2019-10-15 01:09:46,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2019-10-15 01:09:46,692 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:46,693 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:46,901 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:46,901 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:46,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:46,902 INFO L82 PathProgramCache]: Analyzing trace with hash 46157218, now seen corresponding path program 1 times [2019-10-15 01:09:46,902 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:46,902 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983517397] [2019-10-15 01:09:46,903 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:46,903 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:46,903 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:46,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:47,090 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-15 01:09:47,090 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983517397] [2019-10-15 01:09:47,090 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855286391] [2019-10-15 01:09:47,091 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:47,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:47,811 INFO L256 TraceCheckSpWp]: Trace formula consists of 3300 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:47,814 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:47,850 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-15 01:09:47,850 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:48,145 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-15 01:09:48,146 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:48,146 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-15 01:09:48,146 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495043796] [2019-10-15 01:09:48,147 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:48,147 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:48,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:48,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:09:48,148 INFO L87 Difference]: Start difference. First operand 1247 states and 1969 transitions. Second operand 4 states. [2019-10-15 01:09:48,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:48,325 INFO L93 Difference]: Finished difference Result 2413 states and 3835 transitions. [2019-10-15 01:09:48,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:09:48,325 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 179 [2019-10-15 01:09:48,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:48,334 INFO L225 Difference]: With dead ends: 2413 [2019-10-15 01:09:48,334 INFO L226 Difference]: Without dead ends: 1247 [2019-10-15 01:09:48,340 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 354 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:09:48,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1247 states. [2019-10-15 01:09:48,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1247 to 1247. [2019-10-15 01:09:48,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1247 states. [2019-10-15 01:09:48,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1247 states to 1247 states and 1964 transitions. [2019-10-15 01:09:48,382 INFO L78 Accepts]: Start accepts. Automaton has 1247 states and 1964 transitions. Word has length 179 [2019-10-15 01:09:48,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:48,382 INFO L462 AbstractCegarLoop]: Abstraction has 1247 states and 1964 transitions. [2019-10-15 01:09:48,382 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:48,382 INFO L276 IsEmpty]: Start isEmpty. Operand 1247 states and 1964 transitions. [2019-10-15 01:09:48,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2019-10-15 01:09:48,387 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:48,388 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:48,596 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:48,597 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:48,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:48,597 INFO L82 PathProgramCache]: Analyzing trace with hash -794313069, now seen corresponding path program 1 times [2019-10-15 01:09:48,597 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:48,597 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855338067] [2019-10-15 01:09:48,598 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:48,598 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:48,598 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:48,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:48,733 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-15 01:09:48,733 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855338067] [2019-10-15 01:09:48,734 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825333426] [2019-10-15 01:09:48,734 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:49,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:49,696 INFO L256 TraceCheckSpWp]: Trace formula consists of 3301 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:09:49,702 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:49,782 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-15 01:09:49,782 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:50,155 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-15 01:09:50,156 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:09:50,156 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 13 [2019-10-15 01:09:50,156 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842001408] [2019-10-15 01:09:50,156 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-15 01:09:50,157 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:50,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-15 01:09:50,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2019-10-15 01:09:50,157 INFO L87 Difference]: Start difference. First operand 1247 states and 1964 transitions. Second operand 11 states. [2019-10-15 01:09:50,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:50,310 INFO L93 Difference]: Finished difference Result 2350 states and 3730 transitions. [2019-10-15 01:09:50,310 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-15 01:09:50,310 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 180 [2019-10-15 01:09:50,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:50,319 INFO L225 Difference]: With dead ends: 2350 [2019-10-15 01:09:50,319 INFO L226 Difference]: Without dead ends: 1262 [2019-10-15 01:09:50,325 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 351 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2019-10-15 01:09:50,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1262 states. [2019-10-15 01:09:50,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1262 to 1254. [2019-10-15 01:09:50,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1254 states. [2019-10-15 01:09:50,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1254 states to 1254 states and 1973 transitions. [2019-10-15 01:09:50,365 INFO L78 Accepts]: Start accepts. Automaton has 1254 states and 1973 transitions. Word has length 180 [2019-10-15 01:09:50,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:50,365 INFO L462 AbstractCegarLoop]: Abstraction has 1254 states and 1973 transitions. [2019-10-15 01:09:50,365 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-15 01:09:50,365 INFO L276 IsEmpty]: Start isEmpty. Operand 1254 states and 1973 transitions. [2019-10-15 01:09:50,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2019-10-15 01:09:50,371 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:50,371 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:50,584 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:50,585 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:50,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:50,585 INFO L82 PathProgramCache]: Analyzing trace with hash -569020629, now seen corresponding path program 1 times [2019-10-15 01:09:50,585 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:50,585 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855293307] [2019-10-15 01:09:50,585 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:50,585 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:50,586 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:50,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:50,689 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-15 01:09:50,689 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855293307] [2019-10-15 01:09:50,689 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279569164] [2019-10-15 01:09:50,689 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:51,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:51,509 INFO L256 TraceCheckSpWp]: Trace formula consists of 3302 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:09:51,513 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:51,575 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-15 01:09:51,575 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:52,033 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-15 01:09:52,034 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:09:52,034 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 10 [2019-10-15 01:09:52,034 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069412231] [2019-10-15 01:09:52,035 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-15 01:09:52,035 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:52,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-15 01:09:52,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-10-15 01:09:52,036 INFO L87 Difference]: Start difference. First operand 1254 states and 1973 transitions. Second operand 8 states. [2019-10-15 01:09:52,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:52,144 INFO L93 Difference]: Finished difference Result 2354 states and 3737 transitions. [2019-10-15 01:09:52,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:09:52,145 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 181 [2019-10-15 01:09:52,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:52,153 INFO L225 Difference]: With dead ends: 2354 [2019-10-15 01:09:52,153 INFO L226 Difference]: Without dead ends: 1266 [2019-10-15 01:09:52,161 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 353 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2019-10-15 01:09:52,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1266 states. [2019-10-15 01:09:52,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1266 to 1261. [2019-10-15 01:09:52,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1261 states. [2019-10-15 01:09:52,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1261 states to 1261 states and 1983 transitions. [2019-10-15 01:09:52,202 INFO L78 Accepts]: Start accepts. Automaton has 1261 states and 1983 transitions. Word has length 181 [2019-10-15 01:09:52,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:52,203 INFO L462 AbstractCegarLoop]: Abstraction has 1261 states and 1983 transitions. [2019-10-15 01:09:52,203 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-15 01:09:52,203 INFO L276 IsEmpty]: Start isEmpty. Operand 1261 states and 1983 transitions. [2019-10-15 01:09:52,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2019-10-15 01:09:52,209 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:52,209 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:52,419 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:52,419 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:52,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:52,420 INFO L82 PathProgramCache]: Analyzing trace with hash 451152774, now seen corresponding path program 1 times [2019-10-15 01:09:52,420 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:52,420 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190257302] [2019-10-15 01:09:52,420 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:52,421 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:52,421 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:52,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:52,557 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-15 01:09:52,558 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190257302] [2019-10-15 01:09:52,558 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715222392] [2019-10-15 01:09:52,558 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:53,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:53,394 INFO L256 TraceCheckSpWp]: Trace formula consists of 3293 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-15 01:09:53,399 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:53,504 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-15 01:09:53,504 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:53,934 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:09:54,021 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-10-15 01:09:54,022 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:54,024 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 9] total 16 [2019-10-15 01:09:54,024 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471261234] [2019-10-15 01:09:54,025 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-15 01:09:54,025 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:54,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-15 01:09:54,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2019-10-15 01:09:54,026 INFO L87 Difference]: Start difference. First operand 1261 states and 1983 transitions. Second operand 9 states. [2019-10-15 01:09:54,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:54,271 INFO L93 Difference]: Finished difference Result 2445 states and 3877 transitions. [2019-10-15 01:09:54,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-15 01:09:54,272 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 179 [2019-10-15 01:09:54,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:54,279 INFO L225 Difference]: With dead ends: 2445 [2019-10-15 01:09:54,279 INFO L226 Difference]: Without dead ends: 1271 [2019-10-15 01:09:54,285 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 343 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2019-10-15 01:09:54,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1271 states. [2019-10-15 01:09:54,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1271 to 1263. [2019-10-15 01:09:54,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1263 states. [2019-10-15 01:09:54,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1263 states to 1263 states and 1989 transitions. [2019-10-15 01:09:54,328 INFO L78 Accepts]: Start accepts. Automaton has 1263 states and 1989 transitions. Word has length 179 [2019-10-15 01:09:54,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:54,328 INFO L462 AbstractCegarLoop]: Abstraction has 1263 states and 1989 transitions. [2019-10-15 01:09:54,329 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-15 01:09:54,329 INFO L276 IsEmpty]: Start isEmpty. Operand 1263 states and 1989 transitions. [2019-10-15 01:09:54,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2019-10-15 01:09:54,335 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:54,336 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:54,544 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:54,544 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:54,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:54,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1483053625, now seen corresponding path program 1 times [2019-10-15 01:09:54,544 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:54,545 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392350628] [2019-10-15 01:09:54,545 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:54,545 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:54,545 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:54,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:54,653 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-15 01:09:54,653 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392350628] [2019-10-15 01:09:54,653 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950105706] [2019-10-15 01:09:54,653 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