/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_spec13_product21.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 00:38:13,548 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 00:38:13,551 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 00:38:13,569 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 00:38:13,570 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 00:38:13,572 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 00:38:13,574 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 00:38:13,583 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 00:38:13,587 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 00:38:13,590 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 00:38:13,591 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 00:38:13,593 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 00:38:13,593 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 00:38:13,595 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 00:38:13,597 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 00:38:13,599 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 00:38:13,601 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 00:38:13,601 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 00:38:13,603 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 00:38:13,607 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 00:38:13,610 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 00:38:13,613 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 00:38:13,616 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 00:38:13,617 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 00:38:13,620 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-07 00:38:13,620 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-07 00:38:13,620 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-07 00:38:13,622 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-07 00:38:13,622 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-07 00:38:13,624 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-07 00:38:13,624 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-07 00:38:13,625 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-07 00:38:13,626 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-07 00:38:13,626 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-07 00:38:13,628 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-07 00:38:13,628 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-07 00:38:13,629 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-07 00:38:13,629 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-07 00:38:13,629 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 00:38:13,630 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 00:38:13,631 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 00:38:13,631 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 00:38:13,665 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 00:38:13,665 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 00:38:13,667 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 00:38:13,669 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 00:38:13,669 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 00:38:13,669 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 00:38:13,669 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 00:38:13,670 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 00:38:13,670 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 00:38:13,670 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 00:38:13,670 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 00:38:13,670 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 00:38:13,671 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 00:38:13,671 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 00:38:13,671 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 00:38:13,671 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 00:38:13,671 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 00:38:13,672 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 00:38:13,674 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 00:38:13,674 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 00:38:13,675 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 00:38:13,675 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 00:38:13,675 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 00:38:13,675 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 00:38:13,675 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 00:38:13,676 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 00:38:13,676 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 00:38:13,676 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 00:38:13,676 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 00:38:13,961 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 00:38:13,976 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 00:38:13,979 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 00:38:13,981 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 00:38:13,981 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 00:38:13,982 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec13_product21.cil.c [2019-11-07 00:38:14,048 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a1b3d0eb/655567b9c53c44838feb94eabb8e8645/FLAG6164b7cc5 [2019-11-07 00:38:14,715 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 00:38:14,717 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec13_product21.cil.c [2019-11-07 00:38:14,749 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a1b3d0eb/655567b9c53c44838feb94eabb8e8645/FLAG6164b7cc5 [2019-11-07 00:38:14,852 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a1b3d0eb/655567b9c53c44838feb94eabb8e8645 [2019-11-07 00:38:14,860 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 00:38:14,862 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 00:38:14,863 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 00:38:14,863 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 00:38:14,866 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 00:38:14,867 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:38:14" (1/1) ... [2019-11-07 00:38:14,870 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@765fe0da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:38:14, skipping insertion in model container [2019-11-07 00:38:14,870 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:38:14" (1/1) ... [2019-11-07 00:38:14,878 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 00:38:14,965 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 00:38:15,611 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 00:38:15,629 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 00:38:15,778 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 00:38:15,851 INFO L192 MainTranslator]: Completed translation [2019-11-07 00:38:15,852 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:38:15 WrapperNode [2019-11-07 00:38:15,852 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 00:38:15,853 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 00:38:15,853 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 00:38:15,853 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 00:38:15,867 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:38:15" (1/1) ... [2019-11-07 00:38:15,867 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:38:15" (1/1) ... [2019-11-07 00:38:15,909 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:38:15" (1/1) ... [2019-11-07 00:38:15,909 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:38:15" (1/1) ... [2019-11-07 00:38:15,971 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:38:15" (1/1) ... [2019-11-07 00:38:16,021 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:38:15" (1/1) ... [2019-11-07 00:38:16,043 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:38:15" (1/1) ... [2019-11-07 00:38:16,058 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 00:38:16,059 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 00:38:16,059 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 00:38:16,059 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 00:38:16,060 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:38:15" (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 00:38:16,149 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 00:38:16,149 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 00:38:16,149 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-11-07 00:38:16,150 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-11-07 00:38:16,150 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-11-07 00:38:16,151 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-11-07 00:38:16,151 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-11-07 00:38:16,152 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-11-07 00:38:16,152 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-11-07 00:38:16,153 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-11-07 00:38:16,153 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-11-07 00:38:16,154 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-11-07 00:38:16,154 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-11-07 00:38:16,155 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-11-07 00:38:16,155 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-11-07 00:38:16,155 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-11-07 00:38:16,157 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-11-07 00:38:16,157 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-11-07 00:38:16,158 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-11-07 00:38:16,158 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-11-07 00:38:16,159 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-11-07 00:38:16,160 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-11-07 00:38:16,160 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-11-07 00:38:16,160 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-11-07 00:38:16,161 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-11-07 00:38:16,161 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-11-07 00:38:16,161 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-11-07 00:38:16,161 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-11-07 00:38:16,162 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-11-07 00:38:16,162 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-11-07 00:38:16,162 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-11-07 00:38:16,163 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-11-07 00:38:16,163 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-11-07 00:38:16,163 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-11-07 00:38:16,163 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 00:38:16,163 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-11-07 00:38:16,164 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-11-07 00:38:16,164 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-11-07 00:38:16,164 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-11-07 00:38:16,165 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-11-07 00:38:16,165 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-11-07 00:38:16,165 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-11-07 00:38:16,165 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-11-07 00:38:16,166 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-11-07 00:38:16,166 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-11-07 00:38:16,166 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-11-07 00:38:16,166 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-11-07 00:38:16,166 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-11-07 00:38:16,166 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-11-07 00:38:16,167 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-11-07 00:38:16,167 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-11-07 00:38:16,167 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2019-11-07 00:38:16,167 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-11-07 00:38:16,167 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-11-07 00:38:16,168 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-11-07 00:38:16,169 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__weight [2019-11-07 00:38:16,169 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-11-07 00:38:16,169 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-11-07 00:38:16,169 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-11-07 00:38:16,169 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-11-07 00:38:16,169 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-11-07 00:38:16,170 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-11-07 00:38:16,170 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-11-07 00:38:16,170 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-11-07 00:38:16,171 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-11-07 00:38:16,171 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-11-07 00:38:16,171 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification13_spec__1 [2019-11-07 00:38:16,172 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification13_spec__2 [2019-11-07 00:38:16,172 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-11-07 00:38:16,172 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-11-07 00:38:16,172 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-11-07 00:38:16,173 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-11-07 00:38:16,173 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-11-07 00:38:16,174 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-11-07 00:38:16,174 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 00:38:16,174 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 00:38:16,174 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-11-07 00:38:16,175 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-11-07 00:38:16,175 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-11-07 00:38:16,176 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-11-07 00:38:16,176 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-11-07 00:38:16,176 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-11-07 00:38:16,176 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-11-07 00:38:16,177 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-11-07 00:38:16,177 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-11-07 00:38:16,178 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-11-07 00:38:16,178 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-11-07 00:38:16,178 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-11-07 00:38:16,178 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-11-07 00:38:16,178 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-11-07 00:38:16,178 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-11-07 00:38:16,179 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-07 00:38:16,179 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-11-07 00:38:16,179 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-11-07 00:38:16,179 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-11-07 00:38:16,179 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-11-07 00:38:16,179 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-11-07 00:38:16,180 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-11-07 00:38:16,180 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-11-07 00:38:16,180 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-11-07 00:38:16,180 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-11-07 00:38:16,180 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-11-07 00:38:16,180 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-11-07 00:38:16,181 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-11-07 00:38:16,181 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-11-07 00:38:16,181 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-11-07 00:38:16,181 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-11-07 00:38:16,181 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-11-07 00:38:16,181 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-11-07 00:38:16,182 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-11-07 00:38:16,182 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-11-07 00:38:16,182 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-11-07 00:38:16,182 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-11-07 00:38:16,182 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-11-07 00:38:16,182 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 00:38:16,182 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-11-07 00:38:16,183 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-11-07 00:38:16,183 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-11-07 00:38:16,183 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-11-07 00:38:16,183 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-11-07 00:38:16,184 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-11-07 00:38:16,184 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-11-07 00:38:16,184 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-11-07 00:38:16,184 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-11-07 00:38:16,186 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-11-07 00:38:16,186 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-11-07 00:38:16,186 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-11-07 00:38:16,186 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-11-07 00:38:16,186 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-11-07 00:38:16,186 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-11-07 00:38:16,187 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2019-11-07 00:38:16,187 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-11-07 00:38:16,187 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-11-07 00:38:16,187 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__weight [2019-11-07 00:38:16,188 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-11-07 00:38:16,188 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-11-07 00:38:16,189 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-11-07 00:38:16,192 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification13_spec__1 [2019-11-07 00:38:16,192 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification13_spec__2 [2019-11-07 00:38:16,195 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 00:38:16,196 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-11-07 00:38:16,196 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-11-07 00:38:16,196 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-11-07 00:38:16,197 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-11-07 00:38:16,202 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-11-07 00:38:16,202 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-07 00:38:16,202 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-07 00:38:16,202 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-11-07 00:38:16,203 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-07 00:38:16,203 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-07 00:38:16,203 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 00:38:16,203 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-07 00:38:16,203 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-11-07 00:38:16,203 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 00:38:16,204 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-11-07 00:38:16,204 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-11-07 00:38:16,205 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 00:38:16,205 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-11-07 00:38:16,205 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-11-07 00:38:16,205 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-11-07 00:38:16,205 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 00:38:16,205 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-07 00:38:16,206 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 00:38:18,366 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 00:38:18,366 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-11-07 00:38:18,368 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:38:18 BoogieIcfgContainer [2019-11-07 00:38:18,368 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 00:38:18,370 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 00:38:18,370 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 00:38:18,374 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 00:38:18,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:38:14" (1/3) ... [2019-11-07 00:38:18,375 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50a2572d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:38:18, skipping insertion in model container [2019-11-07 00:38:18,375 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:38:15" (2/3) ... [2019-11-07 00:38:18,375 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50a2572d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:38:18, skipping insertion in model container [2019-11-07 00:38:18,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:38:18" (3/3) ... [2019-11-07 00:38:18,377 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec13_product21.cil.c [2019-11-07 00:38:18,387 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 00:38:18,400 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 00:38:18,412 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 00:38:18,461 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 00:38:18,462 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 00:38:18,462 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 00:38:18,462 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 00:38:18,462 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 00:38:18,462 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 00:38:18,462 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 00:38:18,463 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 00:38:18,510 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states. [2019-11-07 00:38:18,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-11-07 00:38:18,543 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:38:18,545 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:38:18,548 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:38:18,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:38:18,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1684388016, now seen corresponding path program 1 times [2019-11-07 00:38:18,566 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:38:18,566 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376776286] [2019-11-07 00:38:18,566 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:38:18,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:19,278 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-07 00:38:19,279 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376776286] [2019-11-07 00:38:19,280 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744129418] [2019-11-07 00:38:19,280 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 00:38:19,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:19,973 INFO L256 TraceCheckSpWp]: Trace formula consists of 2981 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:38:19,989 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:38:20,068 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-07 00:38:20,068 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:38:20,271 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-07 00:38:20,272 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:38:20,272 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 4] total 10 [2019-11-07 00:38:20,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887160887] [2019-11-07 00:38:20,282 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:38:20,284 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:38:20,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:38:20,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-11-07 00:38:20,301 INFO L87 Difference]: Start difference. First operand 788 states. Second operand 4 states. [2019-11-07 00:38:20,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:38:20,578 INFO L93 Difference]: Finished difference Result 1291 states and 2100 transitions. [2019-11-07 00:38:20,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:38:20,581 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 152 [2019-11-07 00:38:20,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:38:20,610 INFO L225 Difference]: With dead ends: 1291 [2019-11-07 00:38:20,610 INFO L226 Difference]: Without dead ends: 651 [2019-11-07 00:38:20,620 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 302 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-11-07 00:38:20,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2019-11-07 00:38:20,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 651. [2019-11-07 00:38:20,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 651 states. [2019-11-07 00:38:20,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 1038 transitions. [2019-11-07 00:38:20,729 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 1038 transitions. Word has length 152 [2019-11-07 00:38:20,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:38:20,729 INFO L462 AbstractCegarLoop]: Abstraction has 651 states and 1038 transitions. [2019-11-07 00:38:20,729 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:38:20,730 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 1038 transitions. [2019-11-07 00:38:20,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-11-07 00:38:20,738 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:38:20,739 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:38:20,952 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:38:20,953 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:38:20,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:38:20,954 INFO L82 PathProgramCache]: Analyzing trace with hash 940432692, now seen corresponding path program 1 times [2019-11-07 00:38:20,954 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:38:20,954 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652658791] [2019-11-07 00:38:20,955 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:38:21,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:21,181 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-07 00:38:21,181 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652658791] [2019-11-07 00:38:21,182 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520094677] [2019-11-07 00:38:21,182 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 00:38:21,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:21,796 INFO L256 TraceCheckSpWp]: Trace formula consists of 2983 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:38:21,806 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:38:21,859 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-07 00:38:21,860 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:38:22,052 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 00:38:22,053 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:38:22,053 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 4] total 10 [2019-11-07 00:38:22,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604744974] [2019-11-07 00:38:22,055 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:38:22,055 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:38:22,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:38:22,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-11-07 00:38:22,056 INFO L87 Difference]: Start difference. First operand 651 states and 1038 transitions. Second operand 4 states. [2019-11-07 00:38:22,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:38:22,329 INFO L93 Difference]: Finished difference Result 1313 states and 2123 transitions. [2019-11-07 00:38:22,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:38:22,330 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 154 [2019-11-07 00:38:22,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:38:22,336 INFO L225 Difference]: With dead ends: 1313 [2019-11-07 00:38:22,337 INFO L226 Difference]: Without dead ends: 690 [2019-11-07 00:38:22,341 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 304 SyntacticMatches, 2 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 00:38:22,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2019-11-07 00:38:22,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 690. [2019-11-07 00:38:22,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 690 states. [2019-11-07 00:38:22,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 1112 transitions. [2019-11-07 00:38:22,392 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 1112 transitions. Word has length 154 [2019-11-07 00:38:22,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:38:22,394 INFO L462 AbstractCegarLoop]: Abstraction has 690 states and 1112 transitions. [2019-11-07 00:38:22,395 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:38:22,395 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 1112 transitions. [2019-11-07 00:38:22,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-11-07 00:38:22,407 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:38:22,407 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, 1, 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 00:38:22,615 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:38:22,615 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:38:22,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:38:22,616 INFO L82 PathProgramCache]: Analyzing trace with hash 723677314, now seen corresponding path program 1 times [2019-11-07 00:38:22,616 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:38:22,616 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902654621] [2019-11-07 00:38:22,616 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:38:22,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:22,914 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-07 00:38:22,915 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902654621] [2019-11-07 00:38:22,915 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217433866] [2019-11-07 00:38:22,916 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 00:38:23,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:23,471 INFO L256 TraceCheckSpWp]: Trace formula consists of 2985 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-07 00:38:23,479 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:38:23,622 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-07 00:38:23,623 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:38:23,853 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-07 00:38:23,853 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:38:23,853 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 16 [2019-11-07 00:38:23,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45030015] [2019-11-07 00:38:23,854 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 00:38:23,854 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:38:23,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 00:38:23,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2019-11-07 00:38:23,855 INFO L87 Difference]: Start difference. First operand 690 states and 1112 transitions. Second operand 7 states. [2019-11-07 00:38:24,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:38:24,029 INFO L93 Difference]: Finished difference Result 1366 states and 2214 transitions. [2019-11-07 00:38:24,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:38:24,030 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 156 [2019-11-07 00:38:24,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:38:24,036 INFO L225 Difference]: With dead ends: 1366 [2019-11-07 00:38:24,036 INFO L226 Difference]: Without dead ends: 704 [2019-11-07 00:38:24,040 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 302 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2019-11-07 00:38:24,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2019-11-07 00:38:24,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 697. [2019-11-07 00:38:24,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 697 states. [2019-11-07 00:38:24,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1123 transitions. [2019-11-07 00:38:24,075 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1123 transitions. Word has length 156 [2019-11-07 00:38:24,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:38:24,075 INFO L462 AbstractCegarLoop]: Abstraction has 697 states and 1123 transitions. [2019-11-07 00:38:24,076 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 00:38:24,076 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1123 transitions. [2019-11-07 00:38:24,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2019-11-07 00:38:24,081 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:38:24,081 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, 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 00:38:24,297 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:38:24,297 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:38:24,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:38:24,298 INFO L82 PathProgramCache]: Analyzing trace with hash -336665820, now seen corresponding path program 1 times [2019-11-07 00:38:24,298 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:38:24,298 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190564798] [2019-11-07 00:38:24,298 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:38:24,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:24,413 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 00:38:24,413 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190564798] [2019-11-07 00:38:24,413 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724298167] [2019-11-07 00:38:24,414 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 00:38:25,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:25,047 INFO L256 TraceCheckSpWp]: Trace formula consists of 2986 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:38:25,055 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:38:25,089 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-07 00:38:25,089 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:38:25,239 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 00:38:25,240 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:38:25,240 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-11-07 00:38:25,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612540607] [2019-11-07 00:38:25,242 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:38:25,242 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:38:25,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:38:25,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:38:25,243 INFO L87 Difference]: Start difference. First operand 697 states and 1123 transitions. Second operand 4 states. [2019-11-07 00:38:25,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:38:25,328 INFO L93 Difference]: Finished difference Result 1379 states and 2234 transitions. [2019-11-07 00:38:25,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:38:25,328 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 157 [2019-11-07 00:38:25,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:38:25,335 INFO L225 Difference]: With dead ends: 1379 [2019-11-07 00:38:25,336 INFO L226 Difference]: Without dead ends: 708 [2019-11-07 00:38:25,339 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 310 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:38:25,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2019-11-07 00:38:25,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 706. [2019-11-07 00:38:25,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 706 states. [2019-11-07 00:38:25,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 1131 transitions. [2019-11-07 00:38:25,372 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 1131 transitions. Word has length 157 [2019-11-07 00:38:25,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:38:25,372 INFO L462 AbstractCegarLoop]: Abstraction has 706 states and 1131 transitions. [2019-11-07 00:38:25,372 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:38:25,372 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 1131 transitions. [2019-11-07 00:38:25,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2019-11-07 00:38:25,381 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:38:25,381 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, 1, 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 00:38:25,596 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:38:25,597 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:38:25,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:38:25,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1075846183, now seen corresponding path program 1 times [2019-11-07 00:38:25,598 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:38:25,599 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248434407] [2019-11-07 00:38:25,599 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:38:25,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:25,758 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 00:38:25,758 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248434407] [2019-11-07 00:38:25,759 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200080085] [2019-11-07 00:38:25,759 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 00:38:26,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:26,362 INFO L256 TraceCheckSpWp]: Trace formula consists of 2988 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:38:26,367 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:38:26,402 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-07 00:38:26,402 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:38:26,530 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 00:38:26,531 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:38:26,531 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [4] total 7 [2019-11-07 00:38:26,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025676777] [2019-11-07 00:38:26,535 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 00:38:26,535 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:38:26,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 00:38:26,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:38:26,536 INFO L87 Difference]: Start difference. First operand 706 states and 1131 transitions. Second operand 5 states. [2019-11-07 00:38:26,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:38:26,615 INFO L93 Difference]: Finished difference Result 1359 states and 2195 transitions. [2019-11-07 00:38:26,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:38:26,615 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 160 [2019-11-07 00:38:26,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:38:26,621 INFO L225 Difference]: With dead ends: 1359 [2019-11-07 00:38:26,621 INFO L226 Difference]: Without dead ends: 706 [2019-11-07 00:38:26,625 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 317 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:38:26,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2019-11-07 00:38:26,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 706. [2019-11-07 00:38:26,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 706 states. [2019-11-07 00:38:26,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 1126 transitions. [2019-11-07 00:38:26,653 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 1126 transitions. Word has length 160 [2019-11-07 00:38:26,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:38:26,654 INFO L462 AbstractCegarLoop]: Abstraction has 706 states and 1126 transitions. [2019-11-07 00:38:26,654 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 00:38:26,654 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 1126 transitions. [2019-11-07 00:38:26,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-11-07 00:38:26,659 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:38:26,660 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, 1, 1, 1, 1, 1, 1, 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 00:38:26,874 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:38:26,874 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:38:26,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:38:26,875 INFO L82 PathProgramCache]: Analyzing trace with hash 272976111, now seen corresponding path program 1 times [2019-11-07 00:38:26,875 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:38:26,875 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390931811] [2019-11-07 00:38:26,875 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:38:26,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:26,998 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 00:38:26,998 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390931811] [2019-11-07 00:38:26,999 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241120270] [2019-11-07 00:38:26,999 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 00:38:27,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:27,590 INFO L256 TraceCheckSpWp]: Trace formula consists of 2989 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:38:27,597 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:38:27,637 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-07 00:38:27,638 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:38:27,757 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-07 00:38:27,757 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:38:27,758 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [4] total 7 [2019-11-07 00:38:27,758 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765504348] [2019-11-07 00:38:27,759 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 00:38:27,760 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:38:27,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 00:38:27,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:38:27,760 INFO L87 Difference]: Start difference. First operand 706 states and 1126 transitions. Second operand 5 states. [2019-11-07 00:38:28,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:38:28,047 INFO L93 Difference]: Finished difference Result 1355 states and 2186 transitions. [2019-11-07 00:38:28,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:38:28,048 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 161 [2019-11-07 00:38:28,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:38:28,058 INFO L225 Difference]: With dead ends: 1355 [2019-11-07 00:38:28,058 INFO L226 Difference]: Without dead ends: 748 [2019-11-07 00:38:28,064 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 319 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:38:28,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2019-11-07 00:38:28,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 745. [2019-11-07 00:38:28,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 745 states. [2019-11-07 00:38:28,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 1199 transitions. [2019-11-07 00:38:28,099 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 1199 transitions. Word has length 161 [2019-11-07 00:38:28,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:38:28,100 INFO L462 AbstractCegarLoop]: Abstraction has 745 states and 1199 transitions. [2019-11-07 00:38:28,100 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 00:38:28,100 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 1199 transitions. [2019-11-07 00:38:28,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-11-07 00:38:28,107 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:38:28,107 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, 1, 1, 1, 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 00:38:28,318 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:38:28,318 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:38:28,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:38:28,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1911239619, now seen corresponding path program 1 times [2019-11-07 00:38:28,319 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:38:28,319 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140386890] [2019-11-07 00:38:28,320 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:38:28,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:28,468 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 00:38:28,468 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140386890] [2019-11-07 00:38:28,468 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812602484] [2019-11-07 00:38:28,469 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 00:38:29,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:29,071 INFO L256 TraceCheckSpWp]: Trace formula consists of 2990 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-07 00:38:29,076 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:38:29,135 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-07 00:38:29,135 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:38:29,364 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-07 00:38:29,365 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:38:29,365 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 13 [2019-11-07 00:38:29,365 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560507510] [2019-11-07 00:38:29,366 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-07 00:38:29,366 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:38:29,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-07 00:38:29,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2019-11-07 00:38:29,367 INFO L87 Difference]: Start difference. First operand 745 states and 1199 transitions. Second operand 11 states. [2019-11-07 00:38:29,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:38:29,550 INFO L93 Difference]: Finished difference Result 1372 states and 2206 transitions. [2019-11-07 00:38:29,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-07 00:38:29,550 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 162 [2019-11-07 00:38:29,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:38:29,557 INFO L225 Difference]: With dead ends: 1372 [2019-11-07 00:38:29,557 INFO L226 Difference]: Without dead ends: 765 [2019-11-07 00:38:29,561 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 315 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2019-11-07 00:38:29,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2019-11-07 00:38:29,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 752. [2019-11-07 00:38:29,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 752 states. [2019-11-07 00:38:29,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 1208 transitions. [2019-11-07 00:38:29,588 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 1208 transitions. Word has length 162 [2019-11-07 00:38:29,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:38:29,589 INFO L462 AbstractCegarLoop]: Abstraction has 752 states and 1208 transitions. [2019-11-07 00:38:29,589 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-07 00:38:29,589 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 1208 transitions. [2019-11-07 00:38:29,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2019-11-07 00:38:29,594 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:38:29,594 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:38:29,801 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:38:29,801 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:38:29,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:38:29,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1909112071, now seen corresponding path program 1 times [2019-11-07 00:38:29,803 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:38:29,804 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890026670] [2019-11-07 00:38:29,804 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:38:29,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:29,950 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 00:38:29,951 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890026670] [2019-11-07 00:38:29,955 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085738621] [2019-11-07 00:38:29,955 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 00:38:30,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:30,553 INFO L256 TraceCheckSpWp]: Trace formula consists of 2992 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:38:30,559 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:38:30,648 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-07 00:38:30,648 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:38:30,763 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 00:38:30,764 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:38:30,764 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [4] total 8 [2019-11-07 00:38:30,764 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535619416] [2019-11-07 00:38:30,765 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 00:38:30,765 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:38:30,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 00:38:30,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:38:30,766 INFO L87 Difference]: Start difference. First operand 752 states and 1208 transitions. Second operand 6 states. [2019-11-07 00:38:30,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:38:30,859 INFO L93 Difference]: Finished difference Result 1417 states and 2285 transitions. [2019-11-07 00:38:30,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:38:30,859 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 164 [2019-11-07 00:38:30,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:38:30,865 INFO L225 Difference]: With dead ends: 1417 [2019-11-07 00:38:30,866 INFO L226 Difference]: Without dead ends: 752 [2019-11-07 00:38:30,870 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 326 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2019-11-07 00:38:30,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2019-11-07 00:38:30,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 752. [2019-11-07 00:38:30,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 752 states. [2019-11-07 00:38:30,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 1205 transitions. [2019-11-07 00:38:30,915 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 1205 transitions. Word has length 164 [2019-11-07 00:38:30,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:38:30,915 INFO L462 AbstractCegarLoop]: Abstraction has 752 states and 1205 transitions. [2019-11-07 00:38:30,916 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 00:38:30,916 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 1205 transitions. [2019-11-07 00:38:30,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2019-11-07 00:38:30,928 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:38:30,929 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, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:38:31,138 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:38:31,138 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:38:31,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:38:31,139 INFO L82 PathProgramCache]: Analyzing trace with hash -316063958, now seen corresponding path program 1 times [2019-11-07 00:38:31,139 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:38:31,139 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584646439] [2019-11-07 00:38:31,140 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:38:31,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:31,316 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 00:38:31,317 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584646439] [2019-11-07 00:38:31,317 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081093888] [2019-11-07 00:38:31,317 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 00:38:32,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:32,024 INFO L256 TraceCheckSpWp]: Trace formula consists of 2992 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-07 00:38:32,033 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:38:32,062 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-07 00:38:32,062 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:38:32,173 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 00:38:32,174 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:38:32,174 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 5 [2019-11-07 00:38:32,174 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563476785] [2019-11-07 00:38:32,176 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:38:32,176 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:38:32,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:38:32,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-07 00:38:32,177 INFO L87 Difference]: Start difference. First operand 752 states and 1205 transitions. Second operand 4 states. [2019-11-07 00:38:32,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:38:32,234 INFO L93 Difference]: Finished difference Result 1463 states and 2366 transitions. [2019-11-07 00:38:32,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:38:32,234 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 165 [2019-11-07 00:38:32,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:38:32,242 INFO L225 Difference]: With dead ends: 1463 [2019-11-07 00:38:32,242 INFO L226 Difference]: Without dead ends: 735 [2019-11-07 00:38:32,248 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-11-07 00:38:32,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2019-11-07 00:38:32,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 735. [2019-11-07 00:38:32,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 735 states. [2019-11-07 00:38:32,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 1176 transitions. [2019-11-07 00:38:32,282 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 1176 transitions. Word has length 165 [2019-11-07 00:38:32,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:38:32,283 INFO L462 AbstractCegarLoop]: Abstraction has 735 states and 1176 transitions. [2019-11-07 00:38:32,283 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:38:32,283 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 1176 transitions. [2019-11-07 00:38:32,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-11-07 00:38:32,295 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:38:32,295 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:38:32,506 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:38:32,507 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:38:32,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:38:32,507 INFO L82 PathProgramCache]: Analyzing trace with hash 702741203, now seen corresponding path program 1 times [2019-11-07 00:38:32,508 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:38:32,508 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637278360] [2019-11-07 00:38:32,508 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:38:32,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:32,829 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-07 00:38:32,829 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637278360] [2019-11-07 00:38:32,829 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819999621] [2019-11-07 00:38:32,830 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 00:38:33,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:33,632 INFO L256 TraceCheckSpWp]: Trace formula consists of 2990 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-07 00:38:33,640 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:38:33,736 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-07 00:38:33,737 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:38:33,976 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-07 00:38:33,976 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:38:33,977 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 16 [2019-11-07 00:38:33,978 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588345005] [2019-11-07 00:38:33,979 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 00:38:33,979 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:38:33,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 00:38:33,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2019-11-07 00:38:33,980 INFO L87 Difference]: Start difference. First operand 735 states and 1176 transitions. Second operand 7 states. [2019-11-07 00:38:34,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:38:34,097 INFO L93 Difference]: Finished difference Result 1418 states and 2274 transitions. [2019-11-07 00:38:34,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:38:34,098 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 162 [2019-11-07 00:38:34,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:38:34,103 INFO L225 Difference]: With dead ends: 1418 [2019-11-07 00:38:34,103 INFO L226 Difference]: Without dead ends: 737 [2019-11-07 00:38:34,107 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 314 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2019-11-07 00:38:34,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2019-11-07 00:38:34,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 729. [2019-11-07 00:38:34,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 729 states. [2019-11-07 00:38:34,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 729 states to 729 states and 1162 transitions. [2019-11-07 00:38:34,137 INFO L78 Accepts]: Start accepts. Automaton has 729 states and 1162 transitions. Word has length 162 [2019-11-07 00:38:34,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:38:34,137 INFO L462 AbstractCegarLoop]: Abstraction has 729 states and 1162 transitions. [2019-11-07 00:38:34,137 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 00:38:34,137 INFO L276 IsEmpty]: Start isEmpty. Operand 729 states and 1162 transitions. [2019-11-07 00:38:34,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-11-07 00:38:34,143 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:38:34,143 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:38:34,351 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:38:34,351 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:38:34,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:38:34,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1210154117, now seen corresponding path program 1 times [2019-11-07 00:38:34,352 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:38:34,352 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153873424] [2019-11-07 00:38:34,352 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:38:34,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:34,550 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-07 00:38:34,550 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153873424] [2019-11-07 00:38:34,550 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252791256] [2019-11-07 00:38:34,551 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 00:38:35,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:35,204 INFO L256 TraceCheckSpWp]: Trace formula consists of 2991 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-07 00:38:35,208 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:38:35,276 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-07 00:38:35,276 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:38:35,472 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-07 00:38:35,473 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:38:35,473 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 13 [2019-11-07 00:38:35,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003695643] [2019-11-07 00:38:35,473 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 00:38:35,474 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:38:35,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 00:38:35,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2019-11-07 00:38:35,474 INFO L87 Difference]: Start difference. First operand 729 states and 1162 transitions. Second operand 7 states. [2019-11-07 00:38:35,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:38:35,601 INFO L93 Difference]: Finished difference Result 1412 states and 2259 transitions. [2019-11-07 00:38:35,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:38:35,602 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 163 [2019-11-07 00:38:35,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:38:35,607 INFO L225 Difference]: With dead ends: 1412 [2019-11-07 00:38:35,607 INFO L226 Difference]: Without dead ends: 731 [2019-11-07 00:38:35,611 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 316 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2019-11-07 00:38:35,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2019-11-07 00:38:35,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 723. [2019-11-07 00:38:35,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 723 states. [2019-11-07 00:38:35,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 1148 transitions. [2019-11-07 00:38:35,634 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 1148 transitions. Word has length 163 [2019-11-07 00:38:35,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:38:35,634 INFO L462 AbstractCegarLoop]: Abstraction has 723 states and 1148 transitions. [2019-11-07 00:38:35,634 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 00:38:35,634 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 1148 transitions. [2019-11-07 00:38:35,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-11-07 00:38:35,639 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:38:35,639 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:38:35,846 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:38:35,846 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:38:35,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:38:35,846 INFO L82 PathProgramCache]: Analyzing trace with hash 1856385415, now seen corresponding path program 1 times [2019-11-07 00:38:35,847 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:38:35,847 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110277232] [2019-11-07 00:38:35,847 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:38:35,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:35,987 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-07 00:38:35,987 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110277232] [2019-11-07 00:38:35,988 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077553092] [2019-11-07 00:38:35,988 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 00:38:36,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:36,735 INFO L256 TraceCheckSpWp]: Trace formula consists of 2987 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-07 00:38:36,742 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:38:36,884 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-07 00:38:36,884 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:38:37,163 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 00:38:37,273 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-07 00:38:37,274 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:38:37,274 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 9] total 19 [2019-11-07 00:38:37,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981297650] [2019-11-07 00:38:37,275 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-07 00:38:37,275 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:38:37,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-07 00:38:37,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2019-11-07 00:38:37,275 INFO L87 Difference]: Start difference. First operand 723 states and 1148 transitions. Second operand 9 states. [2019-11-07 00:38:37,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:38:37,539 INFO L93 Difference]: Finished difference Result 1406 states and 2246 transitions. [2019-11-07 00:38:37,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-07 00:38:37,539 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 163 [2019-11-07 00:38:37,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:38:37,545 INFO L225 Difference]: With dead ends: 1406 [2019-11-07 00:38:37,545 INFO L226 Difference]: Without dead ends: 732 [2019-11-07 00:38:37,550 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 311 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2019-11-07 00:38:37,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2019-11-07 00:38:37,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 725. [2019-11-07 00:38:37,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 725 states. [2019-11-07 00:38:37,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 725 states to 725 states and 1152 transitions. [2019-11-07 00:38:37,585 INFO L78 Accepts]: Start accepts. Automaton has 725 states and 1152 transitions. Word has length 163 [2019-11-07 00:38:37,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:38:37,587 INFO L462 AbstractCegarLoop]: Abstraction has 725 states and 1152 transitions. [2019-11-07 00:38:37,587 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-07 00:38:37,587 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states and 1152 transitions. [2019-11-07 00:38:37,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2019-11-07 00:38:37,592 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:38:37,592 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:38:37,799 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:38:37,799 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:38:37,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:38:37,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1306761489, now seen corresponding path program 1 times [2019-11-07 00:38:37,800 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:38:37,800 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908311451] [2019-11-07 00:38:37,800 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:38:37,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:37,928 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-07 00:38:37,929 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908311451] [2019-11-07 00:38:37,929 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609518624] [2019-11-07 00:38:37,929 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 00:38:38,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:38,599 INFO L256 TraceCheckSpWp]: Trace formula consists of 2988 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-07 00:38:38,604 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:38:38,691 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-07 00:38:38,691 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:38:38,949 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 00:38:39,087 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-07 00:38:39,087 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:38:39,087 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 9] total 19 [2019-11-07 00:38:39,088 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110465236] [2019-11-07 00:38:39,088 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-07 00:38:39,089 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:38:39,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-07 00:38:39,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2019-11-07 00:38:39,090 INFO L87 Difference]: Start difference. First operand 725 states and 1152 transitions. Second operand 9 states. [2019-11-07 00:38:39,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:38:39,292 INFO L93 Difference]: Finished difference Result 1411 states and 2259 transitions. [2019-11-07 00:38:39,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-07 00:38:39,293 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 164 [2019-11-07 00:38:39,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:38:39,299 INFO L225 Difference]: With dead ends: 1411 [2019-11-07 00:38:39,299 INFO L226 Difference]: Without dead ends: 735 [2019-11-07 00:38:39,304 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 313 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2019-11-07 00:38:39,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2019-11-07 00:38:39,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 725. [2019-11-07 00:38:39,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 725 states. [2019-11-07 00:38:39,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 725 states to 725 states and 1152 transitions. [2019-11-07 00:38:39,332 INFO L78 Accepts]: Start accepts. Automaton has 725 states and 1152 transitions. Word has length 164 [2019-11-07 00:38:39,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:38:39,332 INFO L462 AbstractCegarLoop]: Abstraction has 725 states and 1152 transitions. [2019-11-07 00:38:39,333 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-07 00:38:39,333 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states and 1152 transitions. [2019-11-07 00:38:39,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2019-11-07 00:38:39,338 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:38:39,338 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:38:39,546 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:38:39,546 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:38:39,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:38:39,546 INFO L82 PathProgramCache]: Analyzing trace with hash 736360994, now seen corresponding path program 1 times [2019-11-07 00:38:39,547 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:38:39,547 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440474741] [2019-11-07 00:38:39,547 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:38:39,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:39,674 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-07 00:38:39,675 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440474741] [2019-11-07 00:38:39,675 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023180710] [2019-11-07 00:38:39,675 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 00:38:40,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:40,385 INFO L256 TraceCheckSpWp]: Trace formula consists of 2989 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-07 00:38:40,388 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:38:40,483 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-07 00:38:40,483 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:38:40,719 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 00:38:40,807 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-07 00:38:40,808 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:38:40,808 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 9] total 16 [2019-11-07 00:38:40,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040796841] [2019-11-07 00:38:40,809 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-07 00:38:40,809 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:38:40,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-07 00:38:40,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2019-11-07 00:38:40,809 INFO L87 Difference]: Start difference. First operand 725 states and 1152 transitions. Second operand 9 states. [2019-11-07 00:38:41,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:38:41,019 INFO L93 Difference]: Finished difference Result 1411 states and 2259 transitions. [2019-11-07 00:38:41,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-07 00:38:41,019 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 165 [2019-11-07 00:38:41,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:38:41,024 INFO L225 Difference]: With dead ends: 1411 [2019-11-07 00:38:41,025 INFO L226 Difference]: Without dead ends: 735 [2019-11-07 00:38:41,029 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 315 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2019-11-07 00:38:41,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2019-11-07 00:38:41,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 725. [2019-11-07 00:38:41,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 725 states. [2019-11-07 00:38:41,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 725 states to 725 states and 1152 transitions. [2019-11-07 00:38:41,055 INFO L78 Accepts]: Start accepts. Automaton has 725 states and 1152 transitions. Word has length 165 [2019-11-07 00:38:41,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:38:41,055 INFO L462 AbstractCegarLoop]: Abstraction has 725 states and 1152 transitions. [2019-11-07 00:38:41,055 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-07 00:38:41,055 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states and 1152 transitions. [2019-11-07 00:38:41,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-11-07 00:38:41,061 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:38:41,062 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:38:41,270 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:38:41,270 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:38:41,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:38:41,271 INFO L82 PathProgramCache]: Analyzing trace with hash 965077226, now seen corresponding path program 1 times [2019-11-07 00:38:41,271 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:38:41,271 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454148348] [2019-11-07 00:38:41,271 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:38:41,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:41,506 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-07 00:38:41,506 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454148348] [2019-11-07 00:38:41,506 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519878692] [2019-11-07 00:38:41,507 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 00:38:42,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:42,155 INFO L256 TraceCheckSpWp]: Trace formula consists of 2990 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-07 00:38:42,159 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:38:42,178 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-07 00:38:42,178 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:38:42,348 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-07 00:38:42,348 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:38:42,349 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 8 [2019-11-07 00:38:42,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540282523] [2019-11-07 00:38:42,352 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 00:38:42,352 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:38:42,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 00:38:42,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:38:42,353 INFO L87 Difference]: Start difference. First operand 725 states and 1152 transitions. Second operand 7 states. [2019-11-07 00:38:42,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:38:42,461 INFO L93 Difference]: Finished difference Result 1408 states and 2252 transitions. [2019-11-07 00:38:42,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:38:42,462 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 166 [2019-11-07 00:38:42,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:38:42,466 INFO L225 Difference]: With dead ends: 1408 [2019-11-07 00:38:42,466 INFO L226 Difference]: Without dead ends: 724 [2019-11-07 00:38:42,470 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-11-07 00:38:42,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2019-11-07 00:38:42,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 718. [2019-11-07 00:38:42,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 718 states. [2019-11-07 00:38:42,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 1136 transitions. [2019-11-07 00:38:42,496 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 1136 transitions. Word has length 166 [2019-11-07 00:38:42,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:38:42,497 INFO L462 AbstractCegarLoop]: Abstraction has 718 states and 1136 transitions. [2019-11-07 00:38:42,497 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 00:38:42,497 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 1136 transitions. [2019-11-07 00:38:42,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2019-11-07 00:38:42,502 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:38:42,502 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:38:42,710 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:38:42,710 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:38:42,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:38:42,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1270864186, now seen corresponding path program 1 times [2019-11-07 00:38:42,711 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:38:42,711 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893365217] [2019-11-07 00:38:42,711 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:38:42,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:42,899 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-07 00:38:42,900 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893365217] [2019-11-07 00:38:42,900 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:38:42,900 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 00:38:42,900 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005677615] [2019-11-07 00:38:42,901 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:38:42,901 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:38:42,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:38:42,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 00:38:42,901 INFO L87 Difference]: Start difference. First operand 718 states and 1136 transitions. Second operand 4 states. [2019-11-07 00:38:42,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:38:42,952 INFO L93 Difference]: Finished difference Result 1372 states and 2196 transitions. [2019-11-07 00:38:42,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:38:42,952 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 167 [2019-11-07 00:38:42,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:38:42,957 INFO L225 Difference]: With dead ends: 1372 [2019-11-07 00:38:42,957 INFO L226 Difference]: Without dead ends: 702 [2019-11-07 00:38:42,960 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-07 00:38:42,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2019-11-07 00:38:42,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 702. [2019-11-07 00:38:42,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 702 states. [2019-11-07 00:38:42,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 702 states to 702 states and 1110 transitions. [2019-11-07 00:38:42,982 INFO L78 Accepts]: Start accepts. Automaton has 702 states and 1110 transitions. Word has length 167 [2019-11-07 00:38:42,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:38:42,982 INFO L462 AbstractCegarLoop]: Abstraction has 702 states and 1110 transitions. [2019-11-07 00:38:42,982 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:38:42,982 INFO L276 IsEmpty]: Start isEmpty. Operand 702 states and 1110 transitions. [2019-11-07 00:38:42,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2019-11-07 00:38:42,987 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:38:42,988 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, 1, 1, 1, 1, 1, 1, 1, 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 00:38:42,988 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:38:42,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:38:42,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1775248219, now seen corresponding path program 1 times [2019-11-07 00:38:42,988 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:38:42,989 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720975972] [2019-11-07 00:38:42,989 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:38:43,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:43,128 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-07 00:38:43,129 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720975972] [2019-11-07 00:38:43,129 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:38:43,129 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-07 00:38:43,130 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528310356] [2019-11-07 00:38:43,130 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 00:38:43,131 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:38:43,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 00:38:43,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:38:43,131 INFO L87 Difference]: Start difference. First operand 702 states and 1110 transitions. Second operand 7 states. [2019-11-07 00:38:43,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:38:43,265 INFO L93 Difference]: Finished difference Result 1317 states and 2102 transitions. [2019-11-07 00:38:43,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:38:43,266 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 165 [2019-11-07 00:38:43,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:38:43,272 INFO L225 Difference]: With dead ends: 1317 [2019-11-07 00:38:43,273 INFO L226 Difference]: Without dead ends: 685 [2019-11-07 00:38:43,277 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:38:43,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2019-11-07 00:38:43,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 682. [2019-11-07 00:38:43,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-11-07 00:38:43,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1070 transitions. [2019-11-07 00:38:43,304 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1070 transitions. Word has length 165 [2019-11-07 00:38:43,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:38:43,304 INFO L462 AbstractCegarLoop]: Abstraction has 682 states and 1070 transitions. [2019-11-07 00:38:43,304 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 00:38:43,304 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1070 transitions. [2019-11-07 00:38:43,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-11-07 00:38:43,311 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:38:43,312 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:38:43,312 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:38:43,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:38:43,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1063566161, now seen corresponding path program 1 times [2019-11-07 00:38:43,312 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:38:43,313 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272574761] [2019-11-07 00:38:43,313 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:38:43,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:43,481 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-07 00:38:43,482 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272574761] [2019-11-07 00:38:43,482 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:38:43,482 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2019-11-07 00:38:43,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109044205] [2019-11-07 00:38:43,483 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-07 00:38:43,483 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:38:43,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-07 00:38:43,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2019-11-07 00:38:43,484 INFO L87 Difference]: Start difference. First operand 682 states and 1070 transitions. Second operand 11 states. [2019-11-07 00:38:43,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:38:43,805 INFO L93 Difference]: Finished difference Result 1302 states and 2070 transitions. [2019-11-07 00:38:43,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-07 00:38:43,805 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 166 [2019-11-07 00:38:43,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:38:43,810 INFO L225 Difference]: With dead ends: 1302 [2019-11-07 00:38:43,810 INFO L226 Difference]: Without dead ends: 684 [2019-11-07 00:38:43,813 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2019-11-07 00:38:43,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2019-11-07 00:38:43,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 682. [2019-11-07 00:38:43,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-11-07 00:38:43,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1069 transitions. [2019-11-07 00:38:43,834 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1069 transitions. Word has length 166 [2019-11-07 00:38:43,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:38:43,835 INFO L462 AbstractCegarLoop]: Abstraction has 682 states and 1069 transitions. [2019-11-07 00:38:43,835 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-07 00:38:43,835 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1069 transitions. [2019-11-07 00:38:43,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2019-11-07 00:38:43,840 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:38:43,841 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:38:43,841 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:38:43,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:38:43,842 INFO L82 PathProgramCache]: Analyzing trace with hash -130233765, now seen corresponding path program 1 times [2019-11-07 00:38:43,842 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:38:43,842 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067740854] [2019-11-07 00:38:43,842 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:38:43,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:44,036 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-07 00:38:44,036 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067740854] [2019-11-07 00:38:44,037 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:38:44,037 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2019-11-07 00:38:44,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144030329] [2019-11-07 00:38:44,039 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-07 00:38:44,039 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:38:44,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-07 00:38:44,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2019-11-07 00:38:44,040 INFO L87 Difference]: Start difference. First operand 682 states and 1069 transitions. Second operand 11 states. [2019-11-07 00:38:44,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:38:44,354 INFO L93 Difference]: Finished difference Result 1301 states and 2070 transitions. [2019-11-07 00:38:44,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-07 00:38:44,355 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 167 [2019-11-07 00:38:44,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:38:44,360 INFO L225 Difference]: With dead ends: 1301 [2019-11-07 00:38:44,360 INFO L226 Difference]: Without dead ends: 690 [2019-11-07 00:38:44,363 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2019-11-07 00:38:44,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2019-11-07 00:38:44,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 688. [2019-11-07 00:38:44,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 688 states. [2019-11-07 00:38:44,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 1076 transitions. [2019-11-07 00:38:44,384 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 1076 transitions. Word has length 167 [2019-11-07 00:38:44,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:38:44,384 INFO L462 AbstractCegarLoop]: Abstraction has 688 states and 1076 transitions. [2019-11-07 00:38:44,384 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-07 00:38:44,384 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 1076 transitions. [2019-11-07 00:38:44,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2019-11-07 00:38:44,389 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:38:44,390 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:38:44,390 INFO L410 AbstractCegarLoop]: === Iteration 20 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:38:44,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:38:44,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1764204204, now seen corresponding path program 1 times [2019-11-07 00:38:44,391 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:38:44,391 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698748932] [2019-11-07 00:38:44,391 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:38:44,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:44,513 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-11-07 00:38:44,514 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698748932] [2019-11-07 00:38:44,514 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:38:44,514 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 00:38:44,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928148085] [2019-11-07 00:38:44,515 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:38:44,515 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:38:44,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:38:44,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 00:38:44,516 INFO L87 Difference]: Start difference. First operand 688 states and 1076 transitions. Second operand 4 states. [2019-11-07 00:38:45,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:38:45,720 INFO L93 Difference]: Finished difference Result 1890 states and 3060 transitions. [2019-11-07 00:38:45,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 00:38:45,721 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 168 [2019-11-07 00:38:45,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:38:45,734 INFO L225 Difference]: With dead ends: 1890 [2019-11-07 00:38:45,735 INFO L226 Difference]: Without dead ends: 1279 [2019-11-07 00:38:45,740 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 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 00:38:45,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1279 states. [2019-11-07 00:38:45,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1279 to 1273. [2019-11-07 00:38:45,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1273 states. [2019-11-07 00:38:45,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1273 states to 1273 states and 2024 transitions. [2019-11-07 00:38:45,814 INFO L78 Accepts]: Start accepts. Automaton has 1273 states and 2024 transitions. Word has length 168 [2019-11-07 00:38:45,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:38:45,816 INFO L462 AbstractCegarLoop]: Abstraction has 1273 states and 2024 transitions. [2019-11-07 00:38:45,816 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:38:45,816 INFO L276 IsEmpty]: Start isEmpty. Operand 1273 states and 2024 transitions. [2019-11-07 00:38:45,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2019-11-07 00:38:45,826 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:38:45,826 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:38:45,827 INFO L410 AbstractCegarLoop]: === Iteration 21 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:38:45,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:38:45,827 INFO L82 PathProgramCache]: Analyzing trace with hash -1098694499, now seen corresponding path program 1 times [2019-11-07 00:38:45,828 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:38:45,828 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424532387] [2019-11-07 00:38:45,828 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:38:45,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:46,152 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-11-07 00:38:46,153 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424532387] [2019-11-07 00:38:46,153 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:38:46,153 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 00:38:46,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239637573] [2019-11-07 00:38:46,156 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:38:46,156 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:38:46,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:38:46,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 00:38:46,157 INFO L87 Difference]: Start difference. First operand 1273 states and 2024 transitions. Second operand 4 states.