/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/product-lines/elevator_spec1_product22.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 00:40:29,870 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 00:40:29,873 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 00:40:29,893 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 00:40:29,893 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 00:40:29,895 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 00:40:29,897 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 00:40:29,909 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 00:40:29,911 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 00:40:29,912 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 00:40:29,914 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 00:40:29,915 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 00:40:29,916 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 00:40:29,919 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 00:40:29,921 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 00:40:29,924 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 00:40:29,926 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 00:40:29,928 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 00:40:29,930 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 00:40:29,936 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 00:40:29,940 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 00:40:29,941 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 00:40:29,942 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 00:40:29,942 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 00:40:29,944 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-07 00:40:29,944 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-07 00:40:29,945 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-07 00:40:29,945 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-07 00:40:29,946 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-07 00:40:29,947 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-07 00:40:29,947 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-07 00:40:29,948 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-07 00:40:29,948 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-07 00:40:29,949 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-07 00:40:29,950 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-07 00:40:29,950 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-07 00:40:29,951 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-07 00:40:29,951 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-07 00:40:29,951 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 00:40:29,952 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 00:40:29,953 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 00:40:29,953 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-07 00:40:29,967 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 00:40:29,967 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 00:40:29,969 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 00:40:29,970 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 00:40:29,970 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 00:40:29,970 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 00:40:29,970 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 00:40:29,970 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 00:40:29,970 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 00:40:29,971 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 00:40:29,971 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 00:40:29,971 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 00:40:29,971 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 00:40:29,971 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 00:40:29,971 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 00:40:29,971 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 00:40:29,971 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 00:40:29,972 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 00:40:29,972 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 00:40:29,972 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 00:40:29,972 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 00:40:29,972 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 00:40:29,973 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 00:40:29,973 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 00:40:29,973 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 00:40:29,973 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 00:40:29,973 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 00:40:29,974 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 00:40:29,974 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-11-07 00:40:30,254 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 00:40:30,267 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 00:40:30,271 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 00:40:30,273 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 00:40:30,273 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 00:40:30,274 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec1_product22.cil.c [2019-11-07 00:40:30,353 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5bf92220/31df8ac0d9894418b8734981a897a92a/FLAGf2787b72a [2019-11-07 00:40:31,042 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 00:40:31,045 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec1_product22.cil.c [2019-11-07 00:40:31,083 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5bf92220/31df8ac0d9894418b8734981a897a92a/FLAGf2787b72a [2019-11-07 00:40:31,207 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5bf92220/31df8ac0d9894418b8734981a897a92a [2019-11-07 00:40:31,218 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 00:40:31,219 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 00:40:31,221 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 00:40:31,221 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 00:40:31,225 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 00:40:31,225 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:40:31" (1/1) ... [2019-11-07 00:40:31,228 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@bf4ef99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:40:31, skipping insertion in model container [2019-11-07 00:40:31,229 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:40:31" (1/1) ... [2019-11-07 00:40:31,238 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 00:40:31,326 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 00:40:32,074 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 00:40:32,090 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 00:40:32,222 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 00:40:32,317 INFO L192 MainTranslator]: Completed translation [2019-11-07 00:40:32,318 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:40:32 WrapperNode [2019-11-07 00:40:32,318 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 00:40:32,319 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 00:40:32,319 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 00:40:32,319 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 00:40:32,340 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:40:32" (1/1) ... [2019-11-07 00:40:32,341 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:40:32" (1/1) ... [2019-11-07 00:40:32,416 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:40:32" (1/1) ... [2019-11-07 00:40:32,419 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:40:32" (1/1) ... [2019-11-07 00:40:32,503 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:40:32" (1/1) ... [2019-11-07 00:40:32,543 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:40:32" (1/1) ... [2019-11-07 00:40:32,561 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:40:32" (1/1) ... [2019-11-07 00:40:32,586 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 00:40:32,586 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 00:40:32,586 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 00:40:32,587 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 00:40:32,590 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:40:32" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 00:40:32,648 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 00:40:32,648 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 00:40:32,649 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-11-07 00:40:32,650 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-11-07 00:40:32,650 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-11-07 00:40:32,651 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-11-07 00:40:32,651 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-11-07 00:40:32,651 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-11-07 00:40:32,651 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-11-07 00:40:32,652 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-11-07 00:40:32,652 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-11-07 00:40:32,652 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-11-07 00:40:32,653 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-11-07 00:40:32,654 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-11-07 00:40:32,654 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-11-07 00:40:32,654 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-11-07 00:40:32,656 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-11-07 00:40:32,656 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-11-07 00:40:32,656 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-11-07 00:40:32,656 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-11-07 00:40:32,657 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-11-07 00:40:32,657 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-11-07 00:40:32,657 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-11-07 00:40:32,657 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-11-07 00:40:32,657 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-11-07 00:40:32,658 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-11-07 00:40:32,658 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-11-07 00:40:32,658 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-11-07 00:40:32,658 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-11-07 00:40:32,658 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-11-07 00:40:32,659 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-11-07 00:40:32,659 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-11-07 00:40:32,659 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-11-07 00:40:32,659 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-11-07 00:40:32,659 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-11-07 00:40:32,660 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-11-07 00:40:32,660 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 00:40:32,660 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-11-07 00:40:32,660 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-11-07 00:40:32,660 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-11-07 00:40:32,660 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-11-07 00:40:32,661 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-11-07 00:40:32,661 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-11-07 00:40:32,661 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-11-07 00:40:32,661 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-11-07 00:40:32,661 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-11-07 00:40:32,662 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-11-07 00:40:32,662 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-11-07 00:40:32,662 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-11-07 00:40:32,662 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-11-07 00:40:32,662 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-11-07 00:40:32,662 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-11-07 00:40:32,663 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-11-07 00:40:32,663 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-11-07 00:40:32,663 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-11-07 00:40:32,663 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-11-07 00:40:32,663 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-11-07 00:40:32,663 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-11-07 00:40:32,664 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-11-07 00:40:32,664 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-11-07 00:40:32,664 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-11-07 00:40:32,664 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2019-11-07 00:40:32,664 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-11-07 00:40:32,665 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-11-07 00:40:32,665 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-11-07 00:40:32,665 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__weight [2019-11-07 00:40:32,665 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-11-07 00:40:32,665 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-11-07 00:40:32,666 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-11-07 00:40:32,666 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__twothirdsfull [2019-11-07 00:40:32,666 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-11-07 00:40:32,666 INFO L138 BoogieDeclarations]: Found implementation of procedure printState__wrappee__twothirdsfull [2019-11-07 00:40:32,666 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-11-07 00:40:32,666 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-11-07 00:40:32,667 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2019-11-07 00:40:32,667 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__2 [2019-11-07 00:40:32,667 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__3 [2019-11-07 00:40:32,667 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__4 [2019-11-07 00:40:32,667 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 00:40:32,668 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 00:40:32,668 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-11-07 00:40:32,668 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-07 00:40:32,668 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-07 00:40:32,668 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-11-07 00:40:32,668 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-07 00:40:32,669 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-07 00:40:32,669 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 00:40:32,669 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-07 00:40:32,669 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-11-07 00:40:32,669 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 00:40:32,670 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-11-07 00:40:32,670 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-11-07 00:40:32,670 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 00:40:32,670 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-11-07 00:40:32,670 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-11-07 00:40:32,671 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 00:40:32,671 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-11-07 00:40:32,671 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-11-07 00:40:32,671 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-11-07 00:40:32,671 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-11-07 00:40:32,671 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-11-07 00:40:32,672 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-11-07 00:40:32,672 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-11-07 00:40:32,672 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-11-07 00:40:32,672 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-11-07 00:40:32,672 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__2 [2019-11-07 00:40:32,673 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-11-07 00:40:32,673 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-11-07 00:40:32,673 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-11-07 00:40:32,673 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-11-07 00:40:32,673 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-11-07 00:40:32,673 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-11-07 00:40:32,674 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-11-07 00:40:32,674 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-11-07 00:40:32,674 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-11-07 00:40:32,674 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-07 00:40:32,674 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-11-07 00:40:32,674 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-11-07 00:40:32,675 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-11-07 00:40:32,675 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-11-07 00:40:32,675 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-11-07 00:40:32,675 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-11-07 00:40:32,675 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-11-07 00:40:32,676 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-11-07 00:40:32,676 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-11-07 00:40:32,676 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-11-07 00:40:32,676 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-11-07 00:40:32,676 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-11-07 00:40:32,676 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-11-07 00:40:32,677 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-11-07 00:40:32,677 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-11-07 00:40:32,677 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-11-07 00:40:32,677 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2019-11-07 00:40:32,677 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__4 [2019-11-07 00:40:32,678 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-11-07 00:40:32,678 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-11-07 00:40:32,678 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-11-07 00:40:32,678 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-11-07 00:40:32,678 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-11-07 00:40:32,678 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 00:40:32,679 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-11-07 00:40:32,679 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-11-07 00:40:32,679 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-11-07 00:40:32,679 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-11-07 00:40:32,679 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-11-07 00:40:32,679 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-11-07 00:40:32,679 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-11-07 00:40:32,680 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-11-07 00:40:32,680 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-11-07 00:40:32,680 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-11-07 00:40:32,680 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-11-07 00:40:32,680 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-11-07 00:40:32,680 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-11-07 00:40:32,681 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-11-07 00:40:32,681 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-11-07 00:40:32,681 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-11-07 00:40:32,681 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-11-07 00:40:32,681 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2019-11-07 00:40:32,681 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-11-07 00:40:32,681 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-11-07 00:40:32,681 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__weight [2019-11-07 00:40:32,682 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-11-07 00:40:32,682 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-11-07 00:40:32,682 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-11-07 00:40:32,682 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__twothirdsfull [2019-11-07 00:40:32,682 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__3 [2019-11-07 00:40:32,682 INFO L130 BoogieDeclarations]: Found specification of procedure printState__wrappee__twothirdsfull [2019-11-07 00:40:32,682 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-11-07 00:40:32,683 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 00:40:32,683 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-07 00:40:32,683 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 00:40:35,018 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 00:40:35,018 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-11-07 00:40:35,022 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:40:35 BoogieIcfgContainer [2019-11-07 00:40:35,022 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 00:40:35,023 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 00:40:35,023 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 00:40:35,026 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 00:40:35,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:40:31" (1/3) ... [2019-11-07 00:40:35,028 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30288895 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:40:35, skipping insertion in model container [2019-11-07 00:40:35,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:40:32" (2/3) ... [2019-11-07 00:40:35,028 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30288895 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:40:35, skipping insertion in model container [2019-11-07 00:40:35,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:40:35" (3/3) ... [2019-11-07 00:40:35,030 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product22.cil.c [2019-11-07 00:40:35,040 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 00:40:35,049 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 00:40:35,061 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 00:40:35,105 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 00:40:35,105 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 00:40:35,105 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 00:40:35,106 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 00:40:35,106 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 00:40:35,106 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 00:40:35,106 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 00:40:35,106 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 00:40:35,152 INFO L276 IsEmpty]: Start isEmpty. Operand 790 states. [2019-11-07 00:40:35,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-11-07 00:40:35,185 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:35,186 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:40:35,189 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:35,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:35,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1159872126, now seen corresponding path program 1 times [2019-11-07 00:40:35,207 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:35,207 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462303845] [2019-11-07 00:40:35,208 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:35,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:35,810 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:40:35,811 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462303845] [2019-11-07 00:40:35,812 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933305976] [2019-11-07 00:40:35,812 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:36,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:36,526 INFO L256 TraceCheckSpWp]: Trace formula consists of 3170 conjuncts, 1 conjunts are in the unsatisfiable core [2019-11-07 00:40:36,543 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:36,579 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-07 00:40:36,579 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:36,788 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-07 00:40:36,789 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:40:36,789 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [4] total 4 [2019-11-07 00:40:36,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334902621] [2019-11-07 00:40:36,796 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-07 00:40:36,798 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:36,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-07 00:40:36,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 00:40:36,818 INFO L87 Difference]: Start difference. First operand 790 states. Second operand 2 states. [2019-11-07 00:40:36,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:36,902 INFO L93 Difference]: Finished difference Result 666 states and 1058 transitions. [2019-11-07 00:40:36,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-07 00:40:36,904 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 116 [2019-11-07 00:40:36,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:36,944 INFO L225 Difference]: With dead ends: 666 [2019-11-07 00:40:36,944 INFO L226 Difference]: Without dead ends: 629 [2019-11-07 00:40:36,950 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 00:40:36,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2019-11-07 00:40:37,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 629. [2019-11-07 00:40:37,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 629 states. [2019-11-07 00:40:37,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 1003 transitions. [2019-11-07 00:40:37,068 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 1003 transitions. Word has length 116 [2019-11-07 00:40:37,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:37,071 INFO L462 AbstractCegarLoop]: Abstraction has 629 states and 1003 transitions. [2019-11-07 00:40:37,071 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-07 00:40:37,071 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 1003 transitions. [2019-11-07 00:40:37,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-11-07 00:40:37,075 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:37,075 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:40:37,283 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:37,283 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:37,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:37,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1060701681, now seen corresponding path program 1 times [2019-11-07 00:40:37,285 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:37,285 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040527491] [2019-11-07 00:40:37,285 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:37,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:37,566 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:40:37,568 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040527491] [2019-11-07 00:40:37,568 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168737645] [2019-11-07 00:40:37,568 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:38,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:38,188 INFO L256 TraceCheckSpWp]: Trace formula consists of 3173 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:40:38,198 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:38,256 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-07 00:40:38,256 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:38,519 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:40:38,519 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:40:38,519 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-11-07 00:40:38,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413919617] [2019-11-07 00:40:38,521 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:40:38,521 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:38,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:40:38,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:40:38,522 INFO L87 Difference]: Start difference. First operand 629 states and 1003 transitions. Second operand 4 states. [2019-11-07 00:40:38,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:38,676 INFO L93 Difference]: Finished difference Result 1230 states and 1979 transitions. [2019-11-07 00:40:38,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 00:40:38,684 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 118 [2019-11-07 00:40:38,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:38,694 INFO L225 Difference]: With dead ends: 1230 [2019-11-07 00:40:38,694 INFO L226 Difference]: Without dead ends: 629 [2019-11-07 00:40:38,710 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 232 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-11-07 00:40:38,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2019-11-07 00:40:38,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 629. [2019-11-07 00:40:38,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 629 states. [2019-11-07 00:40:38,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 1002 transitions. [2019-11-07 00:40:38,776 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 1002 transitions. Word has length 118 [2019-11-07 00:40:38,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:38,776 INFO L462 AbstractCegarLoop]: Abstraction has 629 states and 1002 transitions. [2019-11-07 00:40:38,776 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:40:38,777 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 1002 transitions. [2019-11-07 00:40:38,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-11-07 00:40:38,779 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:38,779 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:40:38,995 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:38,995 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:38,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:38,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1607555785, now seen corresponding path program 1 times [2019-11-07 00:40:38,996 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:38,996 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940009004] [2019-11-07 00:40:38,996 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:39,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:39,171 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:40:39,172 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940009004] [2019-11-07 00:40:39,172 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919490014] [2019-11-07 00:40:39,172 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:39,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:39,801 INFO L256 TraceCheckSpWp]: Trace formula consists of 3175 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:40:39,809 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:39,853 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-07 00:40:39,854 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:40,046 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:40:40,047 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:40:40,047 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-11-07 00:40:40,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461133920] [2019-11-07 00:40:40,051 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:40:40,051 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:40,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:40:40,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:40:40,052 INFO L87 Difference]: Start difference. First operand 629 states and 1002 transitions. Second operand 4 states. [2019-11-07 00:40:40,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:40,132 INFO L93 Difference]: Finished difference Result 1230 states and 1977 transitions. [2019-11-07 00:40:40,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 00:40:40,133 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 120 [2019-11-07 00:40:40,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:40,138 INFO L225 Difference]: With dead ends: 1230 [2019-11-07 00:40:40,138 INFO L226 Difference]: Without dead ends: 629 [2019-11-07 00:40:40,142 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 236 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-11-07 00:40:40,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2019-11-07 00:40:40,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 629. [2019-11-07 00:40:40,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 629 states. [2019-11-07 00:40:40,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 1001 transitions. [2019-11-07 00:40:40,169 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 1001 transitions. Word has length 120 [2019-11-07 00:40:40,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:40,170 INFO L462 AbstractCegarLoop]: Abstraction has 629 states and 1001 transitions. [2019-11-07 00:40:40,170 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:40:40,170 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 1001 transitions. [2019-11-07 00:40:40,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-11-07 00:40:40,172 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:40,173 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:40:40,380 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:40,380 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:40,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:40,381 INFO L82 PathProgramCache]: Analyzing trace with hash -104433287, now seen corresponding path program 1 times [2019-11-07 00:40:40,382 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:40,382 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247756560] [2019-11-07 00:40:40,383 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:40,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:40,572 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:40:40,572 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247756560] [2019-11-07 00:40:40,573 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882404395] [2019-11-07 00:40:40,573 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:41,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:41,169 INFO L256 TraceCheckSpWp]: Trace formula consists of 3177 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:40:41,175 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:41,210 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-07 00:40:41,210 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:41,430 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:40:41,431 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:40:41,431 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-11-07 00:40:41,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144733117] [2019-11-07 00:40:41,433 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:40:41,433 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:41,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:40:41,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:40:41,435 INFO L87 Difference]: Start difference. First operand 629 states and 1001 transitions. Second operand 4 states. [2019-11-07 00:40:41,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:41,521 INFO L93 Difference]: Finished difference Result 1237 states and 1984 transitions. [2019-11-07 00:40:41,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:40:41,521 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 122 [2019-11-07 00:40:41,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:41,527 INFO L225 Difference]: With dead ends: 1237 [2019-11-07 00:40:41,527 INFO L226 Difference]: Without dead ends: 638 [2019-11-07 00:40:41,531 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 240 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-11-07 00:40:41,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2019-11-07 00:40:41,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 638. [2019-11-07 00:40:41,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 638 states. [2019-11-07 00:40:41,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 1013 transitions. [2019-11-07 00:40:41,563 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 1013 transitions. Word has length 122 [2019-11-07 00:40:41,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:41,564 INFO L462 AbstractCegarLoop]: Abstraction has 638 states and 1013 transitions. [2019-11-07 00:40:41,564 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:40:41,564 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 1013 transitions. [2019-11-07 00:40:41,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-11-07 00:40:41,567 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:41,567 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:40:41,775 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:41,776 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:41,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:41,777 INFO L82 PathProgramCache]: Analyzing trace with hash -730714916, now seen corresponding path program 1 times [2019-11-07 00:40:41,778 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:41,778 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374863351] [2019-11-07 00:40:41,778 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:41,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:41,933 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:40:41,934 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374863351] [2019-11-07 00:40:41,934 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945726445] [2019-11-07 00:40:41,934 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:42,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:42,644 INFO L256 TraceCheckSpWp]: Trace formula consists of 3178 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:40:42,657 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:42,694 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-07 00:40:42,695 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:42,916 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:40:42,919 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:40:42,919 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-11-07 00:40:42,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908569378] [2019-11-07 00:40:42,921 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:40:42,922 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:42,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:40:42,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:40:42,922 INFO L87 Difference]: Start difference. First operand 638 states and 1013 transitions. Second operand 4 states. [2019-11-07 00:40:43,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:43,058 INFO L93 Difference]: Finished difference Result 1239 states and 1985 transitions. [2019-11-07 00:40:43,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:40:43,058 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 123 [2019-11-07 00:40:43,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:43,072 INFO L225 Difference]: With dead ends: 1239 [2019-11-07 00:40:43,072 INFO L226 Difference]: Without dead ends: 638 [2019-11-07 00:40:43,075 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 242 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-11-07 00:40:43,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2019-11-07 00:40:43,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 638. [2019-11-07 00:40:43,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 638 states. [2019-11-07 00:40:43,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 1012 transitions. [2019-11-07 00:40:43,099 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 1012 transitions. Word has length 123 [2019-11-07 00:40:43,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:43,099 INFO L462 AbstractCegarLoop]: Abstraction has 638 states and 1012 transitions. [2019-11-07 00:40:43,099 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:40:43,100 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 1012 transitions. [2019-11-07 00:40:43,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-11-07 00:40:43,102 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:43,102 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:40:43,318 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:43,318 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:43,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:43,319 INFO L82 PathProgramCache]: Analyzing trace with hash -212076067, now seen corresponding path program 1 times [2019-11-07 00:40:43,319 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:43,320 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325473399] [2019-11-07 00:40:43,320 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:43,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:43,427 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:40:43,427 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325473399] [2019-11-07 00:40:43,427 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058502795] [2019-11-07 00:40:43,428 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:44,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:44,046 INFO L256 TraceCheckSpWp]: Trace formula consists of 3179 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:40:44,051 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:44,090 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-07 00:40:44,091 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:44,302 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:40:44,303 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:40:44,303 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-11-07 00:40:44,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456765461] [2019-11-07 00:40:44,304 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:40:44,305 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:44,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:40:44,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:40:44,307 INFO L87 Difference]: Start difference. First operand 638 states and 1012 transitions. Second operand 4 states. [2019-11-07 00:40:44,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:44,382 INFO L93 Difference]: Finished difference Result 1239 states and 1984 transitions. [2019-11-07 00:40:44,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:40:44,382 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 124 [2019-11-07 00:40:44,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:44,388 INFO L225 Difference]: With dead ends: 1239 [2019-11-07 00:40:44,388 INFO L226 Difference]: Without dead ends: 638 [2019-11-07 00:40:44,394 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 244 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:40:44,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2019-11-07 00:40:44,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 638. [2019-11-07 00:40:44,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 638 states. [2019-11-07 00:40:44,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 1011 transitions. [2019-11-07 00:40:44,420 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 1011 transitions. Word has length 124 [2019-11-07 00:40:44,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:44,422 INFO L462 AbstractCegarLoop]: Abstraction has 638 states and 1011 transitions. [2019-11-07 00:40:44,422 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:40:44,422 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 1011 transitions. [2019-11-07 00:40:44,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-11-07 00:40:44,426 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:44,426 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:40:44,634 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:44,634 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:44,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:44,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1439359232, now seen corresponding path program 1 times [2019-11-07 00:40:44,635 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:44,636 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120835715] [2019-11-07 00:40:44,636 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:44,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:44,906 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-07 00:40:44,906 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120835715] [2019-11-07 00:40:44,907 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447800669] [2019-11-07 00:40:44,907 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:45,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:45,511 INFO L256 TraceCheckSpWp]: Trace formula consists of 3180 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-07 00:40:45,516 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:45,605 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 00:40:45,606 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:46,046 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-07 00:40:46,047 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:40:46,047 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10, 7] total 16 [2019-11-07 00:40:46,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818062156] [2019-11-07 00:40:46,049 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 00:40:46,050 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:46,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 00:40:46,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2019-11-07 00:40:46,051 INFO L87 Difference]: Start difference. First operand 638 states and 1011 transitions. Second operand 7 states. [2019-11-07 00:40:46,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:46,242 INFO L93 Difference]: Finished difference Result 1246 states and 1993 transitions. [2019-11-07 00:40:46,243 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:40:46,243 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 125 [2019-11-07 00:40:46,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:46,251 INFO L225 Difference]: With dead ends: 1246 [2019-11-07 00:40:46,251 INFO L226 Difference]: Without dead ends: 649 [2019-11-07 00:40:46,255 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 242 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2019-11-07 00:40:46,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2019-11-07 00:40:46,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 645. [2019-11-07 00:40:46,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 645 states. [2019-11-07 00:40:46,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 1021 transitions. [2019-11-07 00:40:46,285 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 1021 transitions. Word has length 125 [2019-11-07 00:40:46,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:46,286 INFO L462 AbstractCegarLoop]: Abstraction has 645 states and 1021 transitions. [2019-11-07 00:40:46,286 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 00:40:46,286 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 1021 transitions. [2019-11-07 00:40:46,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-11-07 00:40:46,288 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:46,289 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:40:46,496 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:46,496 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:46,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:46,497 INFO L82 PathProgramCache]: Analyzing trace with hash 438750369, now seen corresponding path program 1 times [2019-11-07 00:40:46,497 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:46,497 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267818394] [2019-11-07 00:40:46,497 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:46,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:46,654 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-07 00:40:46,654 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267818394] [2019-11-07 00:40:46,655 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657111468] [2019-11-07 00:40:46,655 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:47,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:47,267 INFO L256 TraceCheckSpWp]: Trace formula consists of 3180 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-07 00:40:47,271 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:47,320 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 00:40:47,320 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:47,618 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-07 00:40:47,618 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:40:47,618 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4, 7] total 10 [2019-11-07 00:40:47,619 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161465366] [2019-11-07 00:40:47,619 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 00:40:47,620 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:47,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 00:40:47,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-11-07 00:40:47,620 INFO L87 Difference]: Start difference. First operand 645 states and 1021 transitions. Second operand 7 states. [2019-11-07 00:40:47,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:47,756 INFO L93 Difference]: Finished difference Result 1252 states and 2002 transitions. [2019-11-07 00:40:47,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:40:47,757 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 126 [2019-11-07 00:40:47,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:47,762 INFO L225 Difference]: With dead ends: 1252 [2019-11-07 00:40:47,762 INFO L226 Difference]: Without dead ends: 652 [2019-11-07 00:40:47,765 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 242 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2019-11-07 00:40:47,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2019-11-07 00:40:47,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 648. [2019-11-07 00:40:47,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 648 states. [2019-11-07 00:40:47,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 1026 transitions. [2019-11-07 00:40:47,792 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 1026 transitions. Word has length 126 [2019-11-07 00:40:47,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:47,793 INFO L462 AbstractCegarLoop]: Abstraction has 648 states and 1026 transitions. [2019-11-07 00:40:47,793 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 00:40:47,793 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 1026 transitions. [2019-11-07 00:40:47,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-11-07 00:40:47,795 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:47,796 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:40:48,002 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:48,003 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:48,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:48,003 INFO L82 PathProgramCache]: Analyzing trace with hash -499781246, now seen corresponding path program 1 times [2019-11-07 00:40:48,003 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:48,004 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156413702] [2019-11-07 00:40:48,004 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:48,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:48,137 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-07 00:40:48,137 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156413702] [2019-11-07 00:40:48,138 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898585340] [2019-11-07 00:40:48,138 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:48,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:48,874 INFO L256 TraceCheckSpWp]: Trace formula consists of 3181 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:40:48,879 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:48,911 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 00:40:48,911 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:49,095 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:40:49,095 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:40:49,095 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 10 [2019-11-07 00:40:49,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334314596] [2019-11-07 00:40:49,096 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:40:49,096 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:49,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:40:49,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-11-07 00:40:49,097 INFO L87 Difference]: Start difference. First operand 648 states and 1026 transitions. Second operand 4 states. [2019-11-07 00:40:49,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:49,254 INFO L93 Difference]: Finished difference Result 1257 states and 2012 transitions. [2019-11-07 00:40:49,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 00:40:49,255 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 126 [2019-11-07 00:40:49,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:49,260 INFO L225 Difference]: With dead ends: 1257 [2019-11-07 00:40:49,260 INFO L226 Difference]: Without dead ends: 648 [2019-11-07 00:40:49,263 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 249 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2019-11-07 00:40:49,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2019-11-07 00:40:49,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 648. [2019-11-07 00:40:49,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 648 states. [2019-11-07 00:40:49,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 1021 transitions. [2019-11-07 00:40:49,289 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 1021 transitions. Word has length 126 [2019-11-07 00:40:49,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:49,289 INFO L462 AbstractCegarLoop]: Abstraction has 648 states and 1021 transitions. [2019-11-07 00:40:49,289 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:40:49,290 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 1021 transitions. [2019-11-07 00:40:49,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-11-07 00:40:49,292 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:49,292 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:40:49,500 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:49,501 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:49,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:49,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1419215856, now seen corresponding path program 1 times [2019-11-07 00:40:49,502 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:49,502 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314554825] [2019-11-07 00:40:49,503 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:49,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:49,640 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-07 00:40:49,641 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314554825] [2019-11-07 00:40:49,641 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920341201] [2019-11-07 00:40:49,641 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:50,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:50,354 INFO L256 TraceCheckSpWp]: Trace formula consists of 3180 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-07 00:40:50,366 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:50,605 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 00:40:50,606 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:51,038 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 00:40:51,137 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-07 00:40:51,138 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:40:51,138 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 9] total 16 [2019-11-07 00:40:51,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551069819] [2019-11-07 00:40:51,139 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-07 00:40:51,139 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:51,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-07 00:40:51,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2019-11-07 00:40:51,140 INFO L87 Difference]: Start difference. First operand 648 states and 1021 transitions. Second operand 9 states. [2019-11-07 00:40:51,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:51,359 INFO L93 Difference]: Finished difference Result 1261 states and 2006 transitions. [2019-11-07 00:40:51,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-07 00:40:51,359 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 129 [2019-11-07 00:40:51,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:51,366 INFO L225 Difference]: With dead ends: 1261 [2019-11-07 00:40:51,366 INFO L226 Difference]: Without dead ends: 658 [2019-11-07 00:40:51,370 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 243 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2019-11-07 00:40:51,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2019-11-07 00:40:51,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 652. [2019-11-07 00:40:51,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 652 states. [2019-11-07 00:40:51,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 1027 transitions. [2019-11-07 00:40:51,412 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 1027 transitions. Word has length 129 [2019-11-07 00:40:51,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:51,412 INFO L462 AbstractCegarLoop]: Abstraction has 652 states and 1027 transitions. [2019-11-07 00:40:51,412 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-07 00:40:51,412 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 1027 transitions. [2019-11-07 00:40:51,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-11-07 00:40:51,415 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:51,416 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:40:51,624 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:51,630 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:51,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:51,631 INFO L82 PathProgramCache]: Analyzing trace with hash -140160693, now seen corresponding path program 1 times [2019-11-07 00:40:51,631 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:51,631 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439613101] [2019-11-07 00:40:51,631 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:51,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:51,742 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-07 00:40:51,742 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439613101] [2019-11-07 00:40:51,743 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83116916] [2019-11-07 00:40:51,743 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:52,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:52,362 INFO L256 TraceCheckSpWp]: Trace formula consists of 3181 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:40:52,366 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:52,394 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 00:40:52,394 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:52,573 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:40:52,573 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:40:52,573 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-11-07 00:40:52,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702165366] [2019-11-07 00:40:52,574 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:40:52,574 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:52,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:40:52,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:40:52,575 INFO L87 Difference]: Start difference. First operand 652 states and 1027 transitions. Second operand 4 states. [2019-11-07 00:40:52,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:52,730 INFO L93 Difference]: Finished difference Result 1267 states and 2018 transitions. [2019-11-07 00:40:52,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 00:40:52,731 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 127 [2019-11-07 00:40:52,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:52,736 INFO L225 Difference]: With dead ends: 1267 [2019-11-07 00:40:52,736 INFO L226 Difference]: Without dead ends: 652 [2019-11-07 00:40:52,739 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 250 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2019-11-07 00:40:52,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2019-11-07 00:40:52,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 652. [2019-11-07 00:40:52,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 652 states. [2019-11-07 00:40:52,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 1022 transitions. [2019-11-07 00:40:52,772 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 1022 transitions. Word has length 127 [2019-11-07 00:40:52,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:52,772 INFO L462 AbstractCegarLoop]: Abstraction has 652 states and 1022 transitions. [2019-11-07 00:40:52,772 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:40:52,772 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 1022 transitions. [2019-11-07 00:40:52,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-11-07 00:40:52,776 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:52,776 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:40:52,992 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:52,993 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:52,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:52,994 INFO L82 PathProgramCache]: Analyzing trace with hash 318446103, now seen corresponding path program 1 times [2019-11-07 00:40:52,994 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:52,995 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963906254] [2019-11-07 00:40:52,995 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:53,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:53,163 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-07 00:40:53,163 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963906254] [2019-11-07 00:40:53,163 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196390885] [2019-11-07 00:40:53,164 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:53,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:53,906 INFO L256 TraceCheckSpWp]: Trace formula consists of 3180 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-07 00:40:53,911 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:53,969 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-07 00:40:53,970 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:54,256 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-07 00:40:54,257 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:40:54,257 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 13 [2019-11-07 00:40:54,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481402253] [2019-11-07 00:40:54,258 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-07 00:40:54,258 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:54,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-07 00:40:54,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2019-11-07 00:40:54,258 INFO L87 Difference]: Start difference. First operand 652 states and 1022 transitions. Second operand 11 states. [2019-11-07 00:40:54,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:54,403 INFO L93 Difference]: Finished difference Result 1191 states and 1893 transitions. [2019-11-07 00:40:54,404 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-07 00:40:54,404 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 130 [2019-11-07 00:40:54,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:54,409 INFO L225 Difference]: With dead ends: 1191 [2019-11-07 00:40:54,410 INFO L226 Difference]: Without dead ends: 666 [2019-11-07 00:40:54,413 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 251 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2019-11-07 00:40:54,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2019-11-07 00:40:54,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 658. [2019-11-07 00:40:54,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 658 states. [2019-11-07 00:40:54,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 1033 transitions. [2019-11-07 00:40:54,436 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 1033 transitions. Word has length 130 [2019-11-07 00:40:54,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:54,436 INFO L462 AbstractCegarLoop]: Abstraction has 658 states and 1033 transitions. [2019-11-07 00:40:54,436 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-07 00:40:54,436 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 1033 transitions. [2019-11-07 00:40:54,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-11-07 00:40:54,439 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:54,439 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:40:54,654 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:54,655 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:54,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:54,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1696867595, now seen corresponding path program 1 times [2019-11-07 00:40:54,656 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:54,656 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274624299] [2019-11-07 00:40:54,657 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:54,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:54,754 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-07 00:40:54,754 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274624299] [2019-11-07 00:40:54,754 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487249046] [2019-11-07 00:40:54,755 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:55,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:55,519 INFO L256 TraceCheckSpWp]: Trace formula consists of 3177 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-07 00:40:55,522 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:55,592 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-07 00:40:55,593 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:55,942 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 00:40:56,124 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-07 00:40:56,124 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:40:56,125 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [4] total 16 [2019-11-07 00:40:56,125 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356577703] [2019-11-07 00:40:56,127 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-07 00:40:56,127 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:56,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-07 00:40:56,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2019-11-07 00:40:56,129 INFO L87 Difference]: Start difference. First operand 658 states and 1033 transitions. Second operand 14 states. [2019-11-07 00:40:56,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:56,497 INFO L93 Difference]: Finished difference Result 1191 states and 1891 transitions. [2019-11-07 00:40:56,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-07 00:40:56,498 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 131 [2019-11-07 00:40:56,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:56,505 INFO L225 Difference]: With dead ends: 1191 [2019-11-07 00:40:56,505 INFO L226 Difference]: Without dead ends: 666 [2019-11-07 00:40:56,510 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 248 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2019-11-07 00:40:56,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2019-11-07 00:40:56,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 656. [2019-11-07 00:40:56,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 656 states. [2019-11-07 00:40:56,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 656 states to 656 states and 1028 transitions. [2019-11-07 00:40:56,555 INFO L78 Accepts]: Start accepts. Automaton has 656 states and 1028 transitions. Word has length 131 [2019-11-07 00:40:56,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:56,556 INFO L462 AbstractCegarLoop]: Abstraction has 656 states and 1028 transitions. [2019-11-07 00:40:56,556 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-07 00:40:56,557 INFO L276 IsEmpty]: Start isEmpty. Operand 656 states and 1028 transitions. [2019-11-07 00:40:56,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-11-07 00:40:56,561 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:56,561 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:40:56,772 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:56,773 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:56,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:56,774 INFO L82 PathProgramCache]: Analyzing trace with hash 49953892, now seen corresponding path program 1 times [2019-11-07 00:40:56,774 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:56,774 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638875926] [2019-11-07 00:40:56,774 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:56,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:56,929 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-07 00:40:56,929 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638875926] [2019-11-07 00:40:56,929 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382671388] [2019-11-07 00:40:56,930 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:57,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:57,580 INFO L256 TraceCheckSpWp]: Trace formula consists of 3178 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-07 00:40:57,584 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:57,652 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-07 00:40:57,652 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:57,994 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 00:40:58,168 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-07 00:40:58,169 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:40:58,169 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [4] total 13 [2019-11-07 00:40:58,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176717231] [2019-11-07 00:40:58,171 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-07 00:40:58,172 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:58,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-07 00:40:58,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2019-11-07 00:40:58,173 INFO L87 Difference]: Start difference. First operand 656 states and 1028 transitions. Second operand 11 states. [2019-11-07 00:40:58,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:58,536 INFO L93 Difference]: Finished difference Result 1194 states and 1901 transitions. [2019-11-07 00:40:58,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-07 00:40:58,537 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 132 [2019-11-07 00:40:58,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:58,544 INFO L225 Difference]: With dead ends: 1194 [2019-11-07 00:40:58,544 INFO L226 Difference]: Without dead ends: 669 [2019-11-07 00:40:58,549 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 251 SyntacticMatches, 7 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2019-11-07 00:40:58,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2019-11-07 00:40:58,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 667. [2019-11-07 00:40:58,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 667 states. [2019-11-07 00:40:58,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 1051 transitions. [2019-11-07 00:40:58,603 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 1051 transitions. Word has length 132 [2019-11-07 00:40:58,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:58,604 INFO L462 AbstractCegarLoop]: Abstraction has 667 states and 1051 transitions. [2019-11-07 00:40:58,604 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-07 00:40:58,604 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 1051 transitions. [2019-11-07 00:40:58,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-11-07 00:40:58,608 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:58,609 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:40:58,819 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:58,819 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:58,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:58,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1086532538, now seen corresponding path program 1 times [2019-11-07 00:40:58,820 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:58,825 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097184720] [2019-11-07 00:40:58,825 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:58,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:58,966 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-07 00:40:58,967 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097184720] [2019-11-07 00:40:58,967 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129520285] [2019-11-07 00:40:58,967 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:59,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:59,615 INFO L256 TraceCheckSpWp]: Trace formula consists of 3179 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-07 00:40:59,622 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:59,654 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-07 00:40:59,654 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:41:00,041 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 00:41:00,114 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-07 00:41:00,114 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:41:00,114 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [4] total 11 [2019-11-07 00:41:00,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864695543] [2019-11-07 00:41:00,115 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-07 00:41:00,115 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:41:00,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-07 00:41:00,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2019-11-07 00:41:00,116 INFO L87 Difference]: Start difference. First operand 667 states and 1051 transitions. Second operand 9 states. [2019-11-07 00:41:00,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:41:00,245 INFO L93 Difference]: Finished difference Result 1298 states and 2092 transitions. [2019-11-07 00:41:00,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:41:00,245 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 133 [2019-11-07 00:41:00,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:41:00,250 INFO L225 Difference]: With dead ends: 1298 [2019-11-07 00:41:00,250 INFO L226 Difference]: Without dead ends: 676 [2019-11-07 00:41:00,259 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 260 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2019-11-07 00:41:00,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2019-11-07 00:41:00,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 674. [2019-11-07 00:41:00,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 674 states. [2019-11-07 00:41:00,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 674 states to 674 states and 1059 transitions. [2019-11-07 00:41:00,288 INFO L78 Accepts]: Start accepts. Automaton has 674 states and 1059 transitions. Word has length 133 [2019-11-07 00:41:00,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:41:00,291 INFO L462 AbstractCegarLoop]: Abstraction has 674 states and 1059 transitions. [2019-11-07 00:41:00,291 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-07 00:41:00,291 INFO L276 IsEmpty]: Start isEmpty. Operand 674 states and 1059 transitions. [2019-11-07 00:41:00,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-11-07 00:41:00,296 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:41:00,296 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:41:00,504 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:41:00,504 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:41:00,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:41:00,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1561218149, now seen corresponding path program 1 times [2019-11-07 00:41:00,505 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:41:00,505 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91752507] [2019-11-07 00:41:00,505 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:41:00,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:00,753 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-07 00:41:00,753 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91752507] [2019-11-07 00:41:00,754 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918626570] [2019-11-07 00:41:00,754 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:41:01,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:01,547 INFO L256 TraceCheckSpWp]: Trace formula consists of 3180 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-07 00:41:01,550 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:41:01,594 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-07 00:41:01,594 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:41:01,790 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 00:41:01,856 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-07 00:41:01,856 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:41:01,857 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [4] total 10 [2019-11-07 00:41:01,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551022619] [2019-11-07 00:41:01,857 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-07 00:41:01,858 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:41:01,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-07 00:41:01,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-11-07 00:41:01,858 INFO L87 Difference]: Start difference. First operand 674 states and 1059 transitions. Second operand 8 states. [2019-11-07 00:41:01,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:41:01,974 INFO L93 Difference]: Finished difference Result 1312 states and 2100 transitions. [2019-11-07 00:41:01,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 00:41:01,975 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 134 [2019-11-07 00:41:01,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:41:01,979 INFO L225 Difference]: With dead ends: 1312 [2019-11-07 00:41:01,979 INFO L226 Difference]: Without dead ends: 683 [2019-11-07 00:41:01,983 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 262 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2019-11-07 00:41:01,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2019-11-07 00:41:02,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 678. [2019-11-07 00:41:02,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 678 states. [2019-11-07 00:41:02,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 678 states to 678 states and 1065 transitions. [2019-11-07 00:41:02,009 INFO L78 Accepts]: Start accepts. Automaton has 678 states and 1065 transitions. Word has length 134 [2019-11-07 00:41:02,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:41:02,009 INFO L462 AbstractCegarLoop]: Abstraction has 678 states and 1065 transitions. [2019-11-07 00:41:02,009 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-07 00:41:02,009 INFO L276 IsEmpty]: Start isEmpty. Operand 678 states and 1065 transitions. [2019-11-07 00:41:02,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-11-07 00:41:02,012 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:41:02,012 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:41:02,220 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:41:02,220 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:41:02,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:41:02,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1044824767, now seen corresponding path program 1 times [2019-11-07 00:41:02,221 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:41:02,221 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145900505] [2019-11-07 00:41:02,221 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:41:02,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:02,330 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-07 00:41:02,330 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145900505] [2019-11-07 00:41:02,330 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960832141] [2019-11-07 00:41:02,331 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:41:03,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:03,049 INFO L256 TraceCheckSpWp]: Trace formula consists of 3178 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-07 00:41:03,052 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:41:03,145 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-07 00:41:03,145 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:41:03,729 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 00:41:03,784 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 00:41:03,916 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-07 00:41:03,917 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:41:03,917 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11, 11] imperfect sequences [4] total 19 [2019-11-07 00:41:03,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204289792] [2019-11-07 00:41:03,918 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-07 00:41:03,918 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:41:03,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-07 00:41:03,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2019-11-07 00:41:03,919 INFO L87 Difference]: Start difference. First operand 678 states and 1065 transitions. Second operand 17 states. [2019-11-07 00:41:04,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:41:04,311 INFO L93 Difference]: Finished difference Result 1224 states and 1948 transitions. [2019-11-07 00:41:04,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-07 00:41:04,311 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 135 [2019-11-07 00:41:04,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:41:04,316 INFO L225 Difference]: With dead ends: 1224 [2019-11-07 00:41:04,317 INFO L226 Difference]: Without dead ends: 699 [2019-11-07 00:41:04,321 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 252 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2019-11-07 00:41:04,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2019-11-07 00:41:04,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 687. [2019-11-07 00:41:04,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 687 states. [2019-11-07 00:41:04,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 1080 transitions. [2019-11-07 00:41:04,354 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 1080 transitions. Word has length 135 [2019-11-07 00:41:04,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:41:04,356 INFO L462 AbstractCegarLoop]: Abstraction has 687 states and 1080 transitions. [2019-11-07 00:41:04,356 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-07 00:41:04,356 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 1080 transitions. [2019-11-07 00:41:04,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-11-07 00:41:04,360 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:41:04,360 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:41:04,571 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:41:04,572 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:41:04,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:41:04,573 INFO L82 PathProgramCache]: Analyzing trace with hash -136444597, now seen corresponding path program 1 times [2019-11-07 00:41:04,573 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:41:04,574 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134051607] [2019-11-07 00:41:04,574 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:41:04,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:04,753 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-07 00:41:04,753 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134051607] [2019-11-07 00:41:04,753 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874409439] [2019-11-07 00:41:04,753 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:41:05,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:05,494 INFO L256 TraceCheckSpWp]: Trace formula consists of 3184 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:41:05,498 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:41:05,521 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 00:41:05,521 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:41:05,694 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:41:05,694 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:41:05,694 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-11-07 00:41:05,695 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859586401] [2019-11-07 00:41:05,695 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:41:05,695 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:41:05,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:41:05,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:41:05,696 INFO L87 Difference]: Start difference. First operand 687 states and 1080 transitions. Second operand 4 states. [2019-11-07 00:41:05,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:41:05,884 INFO L93 Difference]: Finished difference Result 1385 states and 2196 transitions. [2019-11-07 00:41:05,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:41:05,885 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 134 [2019-11-07 00:41:05,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:41:05,891 INFO L225 Difference]: With dead ends: 1385 [2019-11-07 00:41:05,891 INFO L226 Difference]: Without dead ends: 741 [2019-11-07 00:41:05,894 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 264 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2019-11-07 00:41:05,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2019-11-07 00:41:05,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 721. [2019-11-07 00:41:05,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 721 states. [2019-11-07 00:41:05,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 1134 transitions. [2019-11-07 00:41:05,919 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 1134 transitions. Word has length 134 [2019-11-07 00:41:05,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:41:05,920 INFO L462 AbstractCegarLoop]: Abstraction has 721 states and 1134 transitions. [2019-11-07 00:41:05,920 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:41:05,920 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 1134 transitions. [2019-11-07 00:41:05,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-11-07 00:41:05,923 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:41:05,923 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]