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_product27.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 21:09:54,732 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 21:09:54,735 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 21:09:54,754 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 21:09:54,754 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 21:09:54,756 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 21:09:54,758 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 21:09:54,767 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 21:09:54,771 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 21:09:54,774 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 21:09:54,775 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 21:09:54,777 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 21:09:54,777 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 21:09:54,779 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 21:09:54,781 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 21:09:54,782 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 21:09:54,784 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 21:09:54,784 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 21:09:54,786 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 21:09:54,790 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 21:09:54,795 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 21:09:54,797 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 21:09:54,800 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 21:09:54,800 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 21:09:54,803 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 21:09:54,803 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 21:09:54,803 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 21:09:54,805 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 21:09:54,806 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 21:09:54,807 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 21:09:54,807 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 21:09:54,808 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 21:09:54,808 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 21:09:54,809 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 21:09:54,811 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 21:09:54,811 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 21:09:54,812 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 21:09:54,812 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 21:09:54,812 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 21:09:54,813 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 21:09:54,814 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 21:09:54,815 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 21:09:54,842 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 21:09:54,843 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 21:09:54,846 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 21:09:54,847 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 21:09:54,847 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 21:09:54,847 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 21:09:54,847 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 21:09:54,847 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 21:09:54,848 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 21:09:54,848 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 21:09:54,848 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 21:09:54,848 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 21:09:54,848 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 21:09:54,849 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 21:09:54,849 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 21:09:54,849 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 21:09:54,849 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 21:09:54,849 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 21:09:54,850 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 21:09:54,850 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 21:09:54,850 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 21:09:54,850 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:09:54,850 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 21:09:54,851 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 21:09:54,851 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 21:09:54,851 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 21:09:54,851 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 21:09:54,851 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 21:09:54,852 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-13 21:09:55,131 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 21:09:55,145 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 21:09:55,150 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 21:09:55,152 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 21:09:55,152 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 21:09:55,153 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec1_product27.cil.c [2019-10-13 21:09:55,234 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a8af5579/379f618d45bf44fda1680a12487a4681/FLAG32548fbbc [2019-10-13 21:09:55,828 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 21:09:55,829 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec1_product27.cil.c [2019-10-13 21:09:55,853 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a8af5579/379f618d45bf44fda1680a12487a4681/FLAG32548fbbc [2019-10-13 21:09:56,075 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a8af5579/379f618d45bf44fda1680a12487a4681 [2019-10-13 21:09:56,084 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 21:09:56,086 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 21:09:56,087 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 21:09:56,087 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 21:09:56,091 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 21:09:56,092 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:09:56" (1/1) ... [2019-10-13 21:09:56,095 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60aa197e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:56, skipping insertion in model container [2019-10-13 21:09:56,095 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:09:56" (1/1) ... [2019-10-13 21:09:56,103 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 21:09:56,174 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 21:09:56,921 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:09:56,942 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 21:09:57,062 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:09:57,122 INFO L192 MainTranslator]: Completed translation [2019-10-13 21:09:57,122 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:57 WrapperNode [2019-10-13 21:09:57,123 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 21:09:57,123 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 21:09:57,124 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 21:09:57,124 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 21:09:57,139 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:57" (1/1) ... [2019-10-13 21:09:57,139 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:57" (1/1) ... [2019-10-13 21:09:57,173 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:57" (1/1) ... [2019-10-13 21:09:57,173 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:57" (1/1) ... [2019-10-13 21:09:57,235 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:57" (1/1) ... [2019-10-13 21:09:57,275 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:57" (1/1) ... [2019-10-13 21:09:57,289 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:57" (1/1) ... [2019-10-13 21:09:57,306 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 21:09:57,307 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 21:09:57,307 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 21:09:57,307 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 21:09:57,309 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:57" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:09:57,396 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 21:09:57,397 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 21:09:57,397 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-13 21:09:57,398 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-10-13 21:09:57,398 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-10-13 21:09:57,398 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-10-13 21:09:57,398 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-10-13 21:09:57,398 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-10-13 21:09:57,399 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-10-13 21:09:57,399 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-10-13 21:09:57,399 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-10-13 21:09:57,399 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-13 21:09:57,400 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-10-13 21:09:57,400 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-10-13 21:09:57,400 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-10-13 21:09:57,400 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-13 21:09:57,401 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-10-13 21:09:57,401 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-13 21:09:57,401 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-13 21:09:57,401 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 21:09:57,401 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-13 21:09:57,402 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-13 21:09:57,402 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-13 21:09:57,402 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-13 21:09:57,403 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-10-13 21:09:57,403 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-10-13 21:09:57,403 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-10-13 21:09:57,403 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-10-13 21:09:57,404 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-10-13 21:09:57,404 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-10-13 21:09:57,404 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-10-13 21:09:57,404 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-10-13 21:09:57,405 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-10-13 21:09:57,405 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-10-13 21:09:57,405 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-10-13 21:09:57,405 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-13 21:09:57,405 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-13 21:09:57,406 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-13 21:09:57,406 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-13 21:09:57,406 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-13 21:09:57,406 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-13 21:09:57,407 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-13 21:09:57,407 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-13 21:09:57,407 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2019-10-13 21:09:57,407 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__2 [2019-10-13 21:09:57,407 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__3 [2019-10-13 21:09:57,408 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__4 [2019-10-13 21:09:57,408 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-10-13 21:09:57,408 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-10-13 21:09:57,408 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-10-13 21:09:57,409 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-10-13 21:09:57,409 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-10-13 21:09:57,409 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-10-13 21:09:57,409 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-10-13 21:09:57,409 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-10-13 21:09:57,410 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__weight [2019-10-13 21:09:57,410 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-10-13 21:09:57,410 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-10-13 21:09:57,410 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-10-13 21:09:57,411 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-10-13 21:09:57,411 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-10-13 21:09:57,411 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-10-13 21:09:57,411 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-10-13 21:09:57,411 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-10-13 21:09:57,412 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-10-13 21:09:57,412 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-10-13 21:09:57,412 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2019-10-13 21:09:57,412 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-10-13 21:09:57,412 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-10-13 21:09:57,413 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-10-13 21:09:57,413 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-10-13 21:09:57,413 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-10-13 21:09:57,413 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-10-13 21:09:57,413 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-10-13 21:09:57,413 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-13 21:09:57,414 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-10-13 21:09:57,414 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-10-13 21:09:57,414 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2019-10-13 21:09:57,414 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloor [2019-10-13 21:09:57,415 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 21:09:57,415 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 21:09:57,415 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 21:09:57,415 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-10-13 21:09:57,415 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-10-13 21:09:57,415 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-10-13 21:09:57,416 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-10-13 21:09:57,416 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-10-13 21:09:57,416 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-10-13 21:09:57,416 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-10-13 21:09:57,416 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-10-13 21:09:57,417 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-10-13 21:09:57,417 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-13 21:09:57,417 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-10-13 21:09:57,417 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-10-13 21:09:57,417 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-10-13 21:09:57,418 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-13 21:09:57,418 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-10-13 21:09:57,418 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-10-13 21:09:57,418 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-10-13 21:09:57,418 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-10-13 21:09:57,419 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-10-13 21:09:57,419 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-13 21:09:57,419 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-10-13 21:09:57,419 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-13 21:09:57,419 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2019-10-13 21:09:57,419 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__4 [2019-10-13 21:09:57,420 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-13 21:09:57,420 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-13 21:09:57,420 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-13 21:09:57,420 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-13 21:09:57,420 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-13 21:09:57,421 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 21:09:57,421 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-13 21:09:57,421 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-10-13 21:09:57,421 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-10-13 21:09:57,421 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-10-13 21:09:57,421 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-10-13 21:09:57,422 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-10-13 21:09:57,422 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-10-13 21:09:57,422 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-10-13 21:09:57,422 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-10-13 21:09:57,422 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-10-13 21:09:57,423 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__2 [2019-10-13 21:09:57,423 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-13 21:09:57,423 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-13 21:09:57,423 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-13 21:09:57,423 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-13 21:09:57,423 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-13 21:09:57,424 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-13 21:09:57,424 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 21:09:57,424 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-13 21:09:57,424 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-13 21:09:57,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 21:09:57,425 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-13 21:09:57,425 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-13 21:09:57,425 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 21:09:57,425 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-13 21:09:57,425 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-13 21:09:57,425 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 21:09:57,426 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-13 21:09:57,426 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-13 21:09:57,426 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-10-13 21:09:57,426 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-10-13 21:09:57,426 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__3 [2019-10-13 21:09:57,426 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-10-13 21:09:57,427 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-10-13 21:09:57,427 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-10-13 21:09:57,427 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-13 21:09:57,427 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-10-13 21:09:57,427 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-10-13 21:09:57,428 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-10-13 21:09:57,428 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-10-13 21:09:57,428 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2019-10-13 21:09:57,428 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloor [2019-10-13 21:09:57,429 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-10-13 21:09:57,429 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-10-13 21:09:57,429 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__weight [2019-10-13 21:09:57,429 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-10-13 21:09:57,430 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-10-13 21:09:57,430 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-10-13 21:09:57,430 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-10-13 21:09:57,430 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-10-13 21:09:57,430 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2019-10-13 21:09:57,431 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-10-13 21:09:57,431 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-10-13 21:09:57,431 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-10-13 21:09:57,431 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-10-13 21:09:57,431 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-10-13 21:09:57,432 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-10-13 21:09:57,432 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-10-13 21:09:57,432 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 21:09:57,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-13 21:09:57,433 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 21:09:59,890 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 21:09:59,890 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-13 21:09:59,892 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:09:59 BoogieIcfgContainer [2019-10-13 21:09:59,892 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 21:09:59,893 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 21:09:59,894 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 21:09:59,897 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 21:09:59,898 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:09:56" (1/3) ... [2019-10-13 21:09:59,899 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@701b4637 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:09:59, skipping insertion in model container [2019-10-13 21:09:59,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:57" (2/3) ... [2019-10-13 21:09:59,899 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@701b4637 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:09:59, skipping insertion in model container [2019-10-13 21:09:59,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:09:59" (3/3) ... [2019-10-13 21:09:59,901 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product27.cil.c [2019-10-13 21:09:59,912 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 21:09:59,927 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 21:09:59,937 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 21:09:59,976 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 21:09:59,976 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 21:09:59,976 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 21:09:59,976 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 21:09:59,976 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 21:09:59,976 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 21:09:59,977 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 21:09:59,977 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 21:10:00,021 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states. [2019-10-13 21:10:00,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2019-10-13 21:10:00,062 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:00,063 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:00,066 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:00,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:00,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1141636338, now seen corresponding path program 1 times [2019-10-13 21:10:00,081 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:00,081 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764243486] [2019-10-13 21:10:00,082 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:00,082 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:00,082 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:00,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:00,847 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 21:10:00,848 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764243486] [2019-10-13 21:10:00,849 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756478217] [2019-10-13 21:10:00,849 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:01,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:01,650 INFO L256 TraceCheckSpWp]: Trace formula consists of 3286 conjuncts, 1 conjunts are in the unsatisfiable core [2019-10-13 21:10:01,670 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:01,717 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-13 21:10:01,718 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:02,257 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-13 21:10:02,258 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:10:02,258 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [4] total 4 [2019-10-13 21:10:02,258 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748375885] [2019-10-13 21:10:02,264 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-13 21:10:02,266 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:02,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-13 21:10:02,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:10:02,282 INFO L87 Difference]: Start difference. First operand 787 states. Second operand 2 states. [2019-10-13 21:10:02,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:02,360 INFO L93 Difference]: Finished difference Result 670 states and 1061 transitions. [2019-10-13 21:10:02,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-13 21:10:02,362 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 164 [2019-10-13 21:10:02,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:02,392 INFO L225 Difference]: With dead ends: 670 [2019-10-13 21:10:02,393 INFO L226 Difference]: Without dead ends: 633 [2019-10-13 21:10:02,399 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:10:02,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2019-10-13 21:10:02,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 633. [2019-10-13 21:10:02,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 633 states. [2019-10-13 21:10:02,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 1006 transitions. [2019-10-13 21:10:02,539 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 1006 transitions. Word has length 164 [2019-10-13 21:10:02,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:02,542 INFO L462 AbstractCegarLoop]: Abstraction has 633 states and 1006 transitions. [2019-10-13 21:10:02,542 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-13 21:10:02,542 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 1006 transitions. [2019-10-13 21:10:02,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-10-13 21:10:02,551 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:02,551 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:02,759 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:02,760 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:02,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:02,761 INFO L82 PathProgramCache]: Analyzing trace with hash -54443263, now seen corresponding path program 1 times [2019-10-13 21:10:02,761 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:02,762 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573559795] [2019-10-13 21:10:02,762 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:02,762 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:02,763 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:02,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:03,045 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 21:10:03,045 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573559795] [2019-10-13 21:10:03,046 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008810698] [2019-10-13 21:10:03,046 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:03,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:03,707 INFO L256 TraceCheckSpWp]: Trace formula consists of 3289 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:03,719 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:03,775 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-13 21:10:03,775 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:04,075 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 21:10:04,075 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:04,076 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:10:04,076 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388516144] [2019-10-13 21:10:04,081 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:04,088 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:04,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:04,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:10:04,089 INFO L87 Difference]: Start difference. First operand 633 states and 1006 transitions. Second operand 4 states. [2019-10-13 21:10:04,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:04,212 INFO L93 Difference]: Finished difference Result 1238 states and 1985 transitions. [2019-10-13 21:10:04,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:10:04,212 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 166 [2019-10-13 21:10:04,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:04,220 INFO L225 Difference]: With dead ends: 1238 [2019-10-13 21:10:04,220 INFO L226 Difference]: Without dead ends: 633 [2019-10-13 21:10:04,229 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 328 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:10:04,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2019-10-13 21:10:04,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 633. [2019-10-13 21:10:04,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 633 states. [2019-10-13 21:10:04,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 1005 transitions. [2019-10-13 21:10:04,266 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 1005 transitions. Word has length 166 [2019-10-13 21:10:04,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:04,267 INFO L462 AbstractCegarLoop]: Abstraction has 633 states and 1005 transitions. [2019-10-13 21:10:04,267 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:04,267 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 1005 transitions. [2019-10-13 21:10:04,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2019-10-13 21:10:04,274 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:04,274 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:04,481 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:04,482 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:04,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:04,483 INFO L82 PathProgramCache]: Analyzing trace with hash 41360599, now seen corresponding path program 1 times [2019-10-13 21:10:04,483 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:04,483 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801917883] [2019-10-13 21:10:04,484 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:04,484 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:04,484 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:04,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:04,647 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 21:10:04,648 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801917883] [2019-10-13 21:10:04,648 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565419944] [2019-10-13 21:10:04,648 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:05,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:05,227 INFO L256 TraceCheckSpWp]: Trace formula consists of 3291 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:05,245 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:05,349 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-13 21:10:05,349 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:05,643 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 21:10:05,644 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:05,644 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:10:05,644 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693117573] [2019-10-13 21:10:05,646 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:05,646 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:05,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:05,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:10:05,649 INFO L87 Difference]: Start difference. First operand 633 states and 1005 transitions. Second operand 4 states. [2019-10-13 21:10:05,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:05,761 INFO L93 Difference]: Finished difference Result 1238 states and 1983 transitions. [2019-10-13 21:10:05,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:10:05,762 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 168 [2019-10-13 21:10:05,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:05,771 INFO L225 Difference]: With dead ends: 1238 [2019-10-13 21:10:05,772 INFO L226 Difference]: Without dead ends: 633 [2019-10-13 21:10:05,776 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 332 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:10:05,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2019-10-13 21:10:05,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 633. [2019-10-13 21:10:05,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 633 states. [2019-10-13 21:10:05,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 1004 transitions. [2019-10-13 21:10:05,825 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 1004 transitions. Word has length 168 [2019-10-13 21:10:05,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:05,827 INFO L462 AbstractCegarLoop]: Abstraction has 633 states and 1004 transitions. [2019-10-13 21:10:05,827 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:05,828 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 1004 transitions. [2019-10-13 21:10:05,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2019-10-13 21:10:05,834 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:05,835 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:06,050 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:06,051 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:06,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:06,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1984965257, now seen corresponding path program 1 times [2019-10-13 21:10:06,052 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:06,053 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499757750] [2019-10-13 21:10:06,053 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:06,054 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:06,054 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:06,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:06,212 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 21:10:06,213 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499757750] [2019-10-13 21:10:06,213 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903464812] [2019-10-13 21:10:06,213 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:06,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:06,869 INFO L256 TraceCheckSpWp]: Trace formula consists of 3293 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:06,876 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:06,909 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-13 21:10:06,909 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:07,190 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 21:10:07,191 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:07,191 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:10:07,191 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414102181] [2019-10-13 21:10:07,192 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:07,192 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:07,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:07,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:10:07,193 INFO L87 Difference]: Start difference. First operand 633 states and 1004 transitions. Second operand 4 states. [2019-10-13 21:10:07,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:07,286 INFO L93 Difference]: Finished difference Result 1245 states and 1990 transitions. [2019-10-13 21:10:07,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:10:07,286 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 170 [2019-10-13 21:10:07,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:07,296 INFO L225 Difference]: With dead ends: 1245 [2019-10-13 21:10:07,296 INFO L226 Difference]: Without dead ends: 642 [2019-10-13 21:10:07,299 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 336 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:10:07,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2019-10-13 21:10:07,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 642. [2019-10-13 21:10:07,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 642 states. [2019-10-13 21:10:07,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 1016 transitions. [2019-10-13 21:10:07,335 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 1016 transitions. Word has length 170 [2019-10-13 21:10:07,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:07,336 INFO L462 AbstractCegarLoop]: Abstraction has 642 states and 1016 transitions. [2019-10-13 21:10:07,336 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:07,336 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 1016 transitions. [2019-10-13 21:10:07,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-10-13 21:10:07,341 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:07,341 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:07,550 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:07,550 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:07,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:07,551 INFO L82 PathProgramCache]: Analyzing trace with hash 1663399092, now seen corresponding path program 1 times [2019-10-13 21:10:07,552 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:07,552 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366774309] [2019-10-13 21:10:07,552 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:07,552 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:07,553 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:07,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:07,747 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 21:10:07,748 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366774309] [2019-10-13 21:10:07,749 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103491255] [2019-10-13 21:10:07,749 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:08,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:08,385 INFO L256 TraceCheckSpWp]: Trace formula consists of 3294 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:08,398 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:08,434 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-13 21:10:08,434 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:08,722 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 21:10:08,723 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:08,723 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:10:08,724 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445753312] [2019-10-13 21:10:08,725 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:08,726 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:08,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:08,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:10:08,727 INFO L87 Difference]: Start difference. First operand 642 states and 1016 transitions. Second operand 4 states. [2019-10-13 21:10:08,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:08,842 INFO L93 Difference]: Finished difference Result 1247 states and 1991 transitions. [2019-10-13 21:10:08,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:10:08,845 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 171 [2019-10-13 21:10:08,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:08,854 INFO L225 Difference]: With dead ends: 1247 [2019-10-13 21:10:08,855 INFO L226 Difference]: Without dead ends: 642 [2019-10-13 21:10:08,859 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 338 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:10:08,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2019-10-13 21:10:08,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 642. [2019-10-13 21:10:08,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 642 states. [2019-10-13 21:10:08,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 1015 transitions. [2019-10-13 21:10:08,902 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 1015 transitions. Word has length 171 [2019-10-13 21:10:08,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:08,902 INFO L462 AbstractCegarLoop]: Abstraction has 642 states and 1015 transitions. [2019-10-13 21:10:08,903 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:08,903 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 1015 transitions. [2019-10-13 21:10:08,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2019-10-13 21:10:08,913 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:08,914 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:09,124 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:09,125 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:09,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:09,126 INFO L82 PathProgramCache]: Analyzing trace with hash 424078317, now seen corresponding path program 1 times [2019-10-13 21:10:09,126 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:09,126 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527473272] [2019-10-13 21:10:09,127 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:09,127 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:09,127 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:09,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:09,320 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 21:10:09,320 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527473272] [2019-10-13 21:10:09,321 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648746887] [2019-10-13 21:10:09,321 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:09,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:09,935 INFO L256 TraceCheckSpWp]: Trace formula consists of 3295 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:09,954 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:09,985 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-13 21:10:09,986 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:10,303 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 21:10:10,304 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:10,305 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-13 21:10:10,305 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171623918] [2019-10-13 21:10:10,307 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:10,309 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:10,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:10,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:10:10,310 INFO L87 Difference]: Start difference. First operand 642 states and 1015 transitions. Second operand 4 states. [2019-10-13 21:10:10,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:10,469 INFO L93 Difference]: Finished difference Result 1247 states and 1990 transitions. [2019-10-13 21:10:10,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:10:10,470 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 172 [2019-10-13 21:10:10,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:10,478 INFO L225 Difference]: With dead ends: 1247 [2019-10-13 21:10:10,478 INFO L226 Difference]: Without dead ends: 642 [2019-10-13 21:10:10,483 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 340 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:10:10,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2019-10-13 21:10:10,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 642. [2019-10-13 21:10:10,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 642 states. [2019-10-13 21:10:10,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 1014 transitions. [2019-10-13 21:10:10,510 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 1014 transitions. Word has length 172 [2019-10-13 21:10:10,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:10,510 INFO L462 AbstractCegarLoop]: Abstraction has 642 states and 1014 transitions. [2019-10-13 21:10:10,510 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:10,511 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 1014 transitions. [2019-10-13 21:10:10,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2019-10-13 21:10:10,519 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:10,519 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:10,731 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:10,731 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:10,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:10,732 INFO L82 PathProgramCache]: Analyzing trace with hash 799135704, now seen corresponding path program 1 times [2019-10-13 21:10:10,732 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:10,732 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363484313] [2019-10-13 21:10:10,732 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:10,733 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:10,733 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:10,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:10,958 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-13 21:10:10,958 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363484313] [2019-10-13 21:10:10,962 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420422064] [2019-10-13 21:10:10,962 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:11,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:11,642 INFO L256 TraceCheckSpWp]: Trace formula consists of 3296 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:11,647 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:11,691 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:10:11,692 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:11,971 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 21:10:11,971 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:11,971 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-10-13 21:10:11,972 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335464730] [2019-10-13 21:10:11,972 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:11,973 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:11,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:11,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:10:11,974 INFO L87 Difference]: Start difference. First operand 642 states and 1014 transitions. Second operand 4 states. [2019-10-13 21:10:12,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:12,176 INFO L93 Difference]: Finished difference Result 1246 states and 1990 transitions. [2019-10-13 21:10:12,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:10:12,177 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 173 [2019-10-13 21:10:12,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:12,186 INFO L225 Difference]: With dead ends: 1246 [2019-10-13 21:10:12,186 INFO L226 Difference]: Without dead ends: 642 [2019-10-13 21:10:12,192 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 344 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-10-13 21:10:12,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2019-10-13 21:10:12,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 642. [2019-10-13 21:10:12,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 642 states. [2019-10-13 21:10:12,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 1009 transitions. [2019-10-13 21:10:12,234 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 1009 transitions. Word has length 173 [2019-10-13 21:10:12,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:12,235 INFO L462 AbstractCegarLoop]: Abstraction has 642 states and 1009 transitions. [2019-10-13 21:10:12,235 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:12,235 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 1009 transitions. [2019-10-13 21:10:12,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2019-10-13 21:10:12,244 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:12,245 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:12,464 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:12,465 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:12,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:12,465 INFO L82 PathProgramCache]: Analyzing trace with hash 524690856, now seen corresponding path program 1 times [2019-10-13 21:10:12,466 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:12,466 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835520422] [2019-10-13 21:10:12,466 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:12,467 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:12,467 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:12,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:12,821 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-13 21:10:12,824 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835520422] [2019-10-13 21:10:12,832 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101418301] [2019-10-13 21:10:12,832 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:13,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:13,496 INFO L256 TraceCheckSpWp]: Trace formula consists of 3298 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:13,501 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:13,544 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:10:13,544 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:13,814 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 21:10:13,814 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:13,815 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-10-13 21:10:13,815 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371192861] [2019-10-13 21:10:13,816 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:13,816 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:13,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:13,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:10:13,817 INFO L87 Difference]: Start difference. First operand 642 states and 1009 transitions. Second operand 4 states. [2019-10-13 21:10:13,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:13,986 INFO L93 Difference]: Finished difference Result 1246 states and 1980 transitions. [2019-10-13 21:10:13,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:10:13,987 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 175 [2019-10-13 21:10:13,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:13,992 INFO L225 Difference]: With dead ends: 1246 [2019-10-13 21:10:13,992 INFO L226 Difference]: Without dead ends: 642 [2019-10-13 21:10:13,996 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 348 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-10-13 21:10:13,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2019-10-13 21:10:14,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 642. [2019-10-13 21:10:14,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 642 states. [2019-10-13 21:10:14,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 1004 transitions. [2019-10-13 21:10:14,018 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 1004 transitions. Word has length 175 [2019-10-13 21:10:14,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:14,019 INFO L462 AbstractCegarLoop]: Abstraction has 642 states and 1004 transitions. [2019-10-13 21:10:14,019 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:14,019 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 1004 transitions. [2019-10-13 21:10:14,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2019-10-13 21:10:14,024 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:14,024 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:14,232 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:14,232 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:14,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:14,233 INFO L82 PathProgramCache]: Analyzing trace with hash 493279630, now seen corresponding path program 1 times [2019-10-13 21:10:14,233 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:14,233 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625968986] [2019-10-13 21:10:14,233 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:14,233 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:14,234 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:14,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:14,510 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-13 21:10:14,510 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625968986] [2019-10-13 21:10:14,511 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774640516] [2019-10-13 21:10:14,511 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:15,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:15,219 INFO L256 TraceCheckSpWp]: Trace formula consists of 3300 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:15,225 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:15,274 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:10:15,274 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:15,542 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 21:10:15,542 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:15,543 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-10-13 21:10:15,543 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394574637] [2019-10-13 21:10:15,544 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:15,544 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:15,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:15,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:10:15,544 INFO L87 Difference]: Start difference. First operand 642 states and 1004 transitions. Second operand 4 states. [2019-10-13 21:10:15,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:15,778 INFO L93 Difference]: Finished difference Result 1282 states and 2029 transitions. [2019-10-13 21:10:15,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:10:15,780 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 177 [2019-10-13 21:10:15,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:15,786 INFO L225 Difference]: With dead ends: 1282 [2019-10-13 21:10:15,786 INFO L226 Difference]: Without dead ends: 681 [2019-10-13 21:10:15,790 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 352 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-10-13 21:10:15,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2019-10-13 21:10:15,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 681. [2019-10-13 21:10:15,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 681 states. [2019-10-13 21:10:15,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 1068 transitions. [2019-10-13 21:10:15,816 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 1068 transitions. Word has length 177 [2019-10-13 21:10:15,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:15,819 INFO L462 AbstractCegarLoop]: Abstraction has 681 states and 1068 transitions. [2019-10-13 21:10:15,819 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:15,819 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 1068 transitions. [2019-10-13 21:10:15,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2019-10-13 21:10:15,824 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:15,824 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] [2019-10-13 21:10:16,040 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:16,041 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:16,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:16,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1246954601, now seen corresponding path program 1 times [2019-10-13 21:10:16,042 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:16,042 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971702010] [2019-10-13 21:10:16,042 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:16,043 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:16,043 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:16,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:16,249 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-13 21:10:16,249 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971702010] [2019-10-13 21:10:16,250 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973126859] [2019-10-13 21:10:16,250 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:17,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:17,047 INFO L256 TraceCheckSpWp]: Trace formula consists of 3301 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:17,051 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:17,094 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:10:17,094 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:17,352 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 21:10:17,352 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:17,353 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-10-13 21:10:17,353 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798138219] [2019-10-13 21:10:17,353 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:17,354 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:17,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:17,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:10:17,354 INFO L87 Difference]: Start difference. First operand 681 states and 1068 transitions. Second operand 4 states. [2019-10-13 21:10:17,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:17,560 INFO L93 Difference]: Finished difference Result 1285 states and 2032 transitions. [2019-10-13 21:10:17,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:10:17,561 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 178 [2019-10-13 21:10:17,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:17,568 INFO L225 Difference]: With dead ends: 1285 [2019-10-13 21:10:17,568 INFO L226 Difference]: Without dead ends: 681 [2019-10-13 21:10:17,573 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 354 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-10-13 21:10:17,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2019-10-13 21:10:17,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 681. [2019-10-13 21:10:17,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 681 states. [2019-10-13 21:10:17,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 1063 transitions. [2019-10-13 21:10:17,602 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 1063 transitions. Word has length 178 [2019-10-13 21:10:17,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:17,602 INFO L462 AbstractCegarLoop]: Abstraction has 681 states and 1063 transitions. [2019-10-13 21:10:17,603 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:17,603 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 1063 transitions. [2019-10-13 21:10:17,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2019-10-13 21:10:17,609 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:17,609 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:17,820 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:17,820 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:17,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:17,821 INFO L82 PathProgramCache]: Analyzing trace with hash 464906472, now seen corresponding path program 1 times [2019-10-13 21:10:17,821 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:17,822 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913079909] [2019-10-13 21:10:17,822 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:17,822 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:17,822 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:17,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:17,975 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-13 21:10:17,976 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913079909] [2019-10-13 21:10:17,976 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364860578] [2019-10-13 21:10:17,976 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:18,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:18,705 INFO L256 TraceCheckSpWp]: Trace formula consists of 3297 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 21:10:18,710 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:18,880 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:10:18,880 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:19,329 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:10:19,434 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-10-13 21:10:19,435 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:19,435 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 9] total 16 [2019-10-13 21:10:19,435 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118485252] [2019-10-13 21:10:19,436 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 21:10:19,436 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:19,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 21:10:19,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2019-10-13 21:10:19,437 INFO L87 Difference]: Start difference. First operand 681 states and 1063 transitions. Second operand 9 states. [2019-10-13 21:10:19,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:19,663 INFO L93 Difference]: Finished difference Result 1298 states and 2046 transitions. [2019-10-13 21:10:19,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 21:10:19,664 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 178 [2019-10-13 21:10:19,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:19,670 INFO L225 Difference]: With dead ends: 1298 [2019-10-13 21:10:19,670 INFO L226 Difference]: Without dead ends: 697 [2019-10-13 21:10:19,673 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 341 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2019-10-13 21:10:19,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2019-10-13 21:10:19,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 690. [2019-10-13 21:10:19,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 690 states. [2019-10-13 21:10:19,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 1076 transitions. [2019-10-13 21:10:19,700 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 1076 transitions. Word has length 178 [2019-10-13 21:10:19,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:19,701 INFO L462 AbstractCegarLoop]: Abstraction has 690 states and 1076 transitions. [2019-10-13 21:10:19,701 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 21:10:19,701 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 1076 transitions. [2019-10-13 21:10:19,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2019-10-13 21:10:19,706 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:19,706 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] [2019-10-13 21:10:19,916 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:19,916 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:19,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:19,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1923884298, now seen corresponding path program 1 times [2019-10-13 21:10:19,918 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:19,918 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461949922] [2019-10-13 21:10:19,918 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:19,918 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:19,918 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:19,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:20,082 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-13 21:10:20,082 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461949922] [2019-10-13 21:10:20,082 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557554363] [2019-10-13 21:10:20,083 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:20,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:20,943 INFO L256 TraceCheckSpWp]: Trace formula consists of 3301 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:20,951 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:20,992 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:10:20,992 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:21,340 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 21:10:21,340 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:21,341 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-13 21:10:21,341 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157895370] [2019-10-13 21:10:21,342 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:21,342 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:21,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:21,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:10:21,342 INFO L87 Difference]: Start difference. First operand 690 states and 1076 transitions. Second operand 4 states. [2019-10-13 21:10:21,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:21,507 INFO L93 Difference]: Finished difference Result 1299 states and 2049 transitions. [2019-10-13 21:10:21,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:10:21,508 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 179 [2019-10-13 21:10:21,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:21,514 INFO L225 Difference]: With dead ends: 1299 [2019-10-13 21:10:21,515 INFO L226 Difference]: Without dead ends: 690 [2019-10-13 21:10:21,518 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 [2019-10-13 21:10:21,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2019-10-13 21:10:21,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 690. [2019-10-13 21:10:21,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 690 states. [2019-10-13 21:10:21,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 1071 transitions. [2019-10-13 21:10:21,551 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 1071 transitions. Word has length 179 [2019-10-13 21:10:21,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:21,551 INFO L462 AbstractCegarLoop]: Abstraction has 690 states and 1071 transitions. [2019-10-13 21:10:21,551 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:21,552 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 1071 transitions. [2019-10-13 21:10:21,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2019-10-13 21:10:21,557 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:21,558 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] [2019-10-13 21:10:21,770 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:21,770 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:21,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:21,771 INFO L82 PathProgramCache]: Analyzing trace with hash -204843997, now seen corresponding path program 1 times [2019-10-13 21:10:21,771 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:21,771 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462688508] [2019-10-13 21:10:21,771 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:21,772 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:21,772 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:21,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:21,963 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-13 21:10:21,964 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462688508] [2019-10-13 21:10:21,964 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834924885] [2019-10-13 21:10:21,964 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:22,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:22,719 INFO L256 TraceCheckSpWp]: Trace formula consists of 3302 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 21:10:22,726 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:22,785 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-13 21:10:22,785 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:23,196 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-13 21:10:23,197 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:10:23,197 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 13 [2019-10-13 21:10:23,197 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483010497] [2019-10-13 21:10:23,198 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 21:10:23,199 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:23,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 21:10:23,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2019-10-13 21:10:23,199 INFO L87 Difference]: Start difference. First operand 690 states and 1071 transitions. Second operand 11 states. [2019-10-13 21:10:23,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:23,330 INFO L93 Difference]: Finished difference Result 1236 states and 1943 transitions. [2019-10-13 21:10:23,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 21:10:23,330 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 180 [2019-10-13 21:10:23,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:23,336 INFO L225 Difference]: With dead ends: 1236 [2019-10-13 21:10:23,337 INFO L226 Difference]: Without dead ends: 707 [2019-10-13 21:10:23,340 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 [2019-10-13 21:10:23,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2019-10-13 21:10:23,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 697. [2019-10-13 21:10:23,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 697 states. [2019-10-13 21:10:23,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1081 transitions. [2019-10-13 21:10:23,376 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1081 transitions. Word has length 180 [2019-10-13 21:10:23,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:23,376 INFO L462 AbstractCegarLoop]: Abstraction has 697 states and 1081 transitions. [2019-10-13 21:10:23,376 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 21:10:23,377 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1081 transitions. [2019-10-13 21:10:23,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2019-10-13 21:10:23,382 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:23,382 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] [2019-10-13 21:10:23,593 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:23,594 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:23,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:23,594 INFO L82 PathProgramCache]: Analyzing trace with hash 521080781, now seen corresponding path program 1 times [2019-10-13 21:10:23,595 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:23,595 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472591583] [2019-10-13 21:10:23,595 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:23,595 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:23,595 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:23,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:23,767 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-13 21:10:23,767 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472591583] [2019-10-13 21:10:23,768 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030264767] [2019-10-13 21:10:23,768 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:24,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:24,706 INFO L256 TraceCheckSpWp]: Trace formula consists of 3303 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 21:10:24,710 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:24,760 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-13 21:10:24,760 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:25,178 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-13 21:10:25,179 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:10:25,179 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 10 [2019-10-13 21:10:25,179 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843902020] [2019-10-13 21:10:25,180 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 21:10:25,180 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:25,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 21:10:25,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-10-13 21:10:25,181 INFO L87 Difference]: Start difference. First operand 697 states and 1081 transitions. Second operand 8 states. [2019-10-13 21:10:25,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:25,340 INFO L93 Difference]: Finished difference Result 1240 states and 1952 transitions. [2019-10-13 21:10:25,340 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:10:25,341 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 181 [2019-10-13 21:10:25,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:25,348 INFO L225 Difference]: With dead ends: 1240 [2019-10-13 21:10:25,348 INFO L226 Difference]: Without dead ends: 711 [2019-10-13 21:10:25,353 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 [2019-10-13 21:10:25,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2019-10-13 21:10:25,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 704. [2019-10-13 21:10:25,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 704 states. [2019-10-13 21:10:25,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704 states to 704 states and 1092 transitions. [2019-10-13 21:10:25,390 INFO L78 Accepts]: Start accepts. Automaton has 704 states and 1092 transitions. Word has length 181 [2019-10-13 21:10:25,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:25,391 INFO L462 AbstractCegarLoop]: Abstraction has 704 states and 1092 transitions. [2019-10-13 21:10:25,391 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 21:10:25,391 INFO L276 IsEmpty]: Start isEmpty. Operand 704 states and 1092 transitions. [2019-10-13 21:10:25,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2019-10-13 21:10:25,397 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:25,397 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] [2019-10-13 21:10:25,608 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:25,609 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:25,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:25,609 INFO L82 PathProgramCache]: Analyzing trace with hash 528409421, now seen corresponding path program 1 times [2019-10-13 21:10:25,610 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:25,610 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485526372] [2019-10-13 21:10:25,610 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:25,610 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:25,610 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:25,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:25,732 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-13 21:10:25,732 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485526372] [2019-10-13 21:10:25,732 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904298828] [2019-10-13 21:10:25,733 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:26,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:26,530 INFO L256 TraceCheckSpWp]: Trace formula consists of 3299 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 21:10:26,534 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:26,614 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-10-13 21:10:26,614 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:27,054 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:10:27,222 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-10-13 21:10:27,223 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:10:27,223 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [4] total 16 [2019-10-13 21:10:27,224 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855048405] [2019-10-13 21:10:27,224 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-13 21:10:27,225 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:27,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-13 21:10:27,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2019-10-13 21:10:27,225 INFO L87 Difference]: Start difference. First operand 704 states and 1092 transitions. Second operand 14 states. [2019-10-13 21:10:27,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:27,554 INFO L93 Difference]: Finished difference Result 1241 states and 1952 transitions. [2019-10-13 21:10:27,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 21:10:27,555 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 181 [2019-10-13 21:10:27,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:27,559 INFO L225 Difference]: With dead ends: 1241 [2019-10-13 21:10:27,559 INFO L226 Difference]: Without dead ends: 712 [2019-10-13 21:10:27,562 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 348 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2019-10-13 21:10:27,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states. [2019-10-13 21:10:27,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 704. [2019-10-13 21:10:27,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 704 states. [2019-10-13 21:10:27,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704 states to 704 states and 1092 transitions. [2019-10-13 21:10:27,590 INFO L78 Accepts]: Start accepts. Automaton has 704 states and 1092 transitions. Word has length 181 [2019-10-13 21:10:27,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:27,590 INFO L462 AbstractCegarLoop]: Abstraction has 704 states and 1092 transitions. [2019-10-13 21:10:27,590 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-13 21:10:27,590 INFO L276 IsEmpty]: Start isEmpty. Operand 704 states and 1092 transitions. [2019-10-13 21:10:27,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2019-10-13 21:10:27,596 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:27,596 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:27,805 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:27,806 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:27,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:27,807 INFO L82 PathProgramCache]: Analyzing trace with hash -53206286, now seen corresponding path program 1 times [2019-10-13 21:10:27,807 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:27,808 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842606449] [2019-10-13 21:10:27,808 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:27,808 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:27,809 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:27,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:27,926 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-13 21:10:27,927 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842606449] [2019-10-13 21:10:27,927 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605424511] [2019-10-13 21:10:27,927 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