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_spec14_product28.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 21:09:08,073 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 21:09:08,075 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 21:09:08,087 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 21:09:08,087 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 21:09:08,088 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 21:09:08,090 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 21:09:08,091 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 21:09:08,093 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 21:09:08,094 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 21:09:08,095 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 21:09:08,096 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 21:09:08,096 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 21:09:08,097 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 21:09:08,098 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 21:09:08,099 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 21:09:08,100 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 21:09:08,101 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 21:09:08,102 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 21:09:08,104 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 21:09:08,106 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 21:09:08,107 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 21:09:08,108 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 21:09:08,109 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 21:09:08,113 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 21:09:08,113 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 21:09:08,114 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 21:09:08,116 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 21:09:08,117 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 21:09:08,118 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 21:09:08,118 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 21:09:08,119 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 21:09:08,120 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 21:09:08,120 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 21:09:08,123 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 21:09:08,124 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 21:09:08,124 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 21:09:08,125 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 21:09:08,125 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 21:09:08,127 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 21:09:08,129 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 21:09:08,131 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 21:09:08,156 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 21:09:08,156 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 21:09:08,157 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 21:09:08,157 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 21:09:08,157 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 21:09:08,158 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 21:09:08,158 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 21:09:08,158 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 21:09:08,158 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 21:09:08,158 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 21:09:08,159 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 21:09:08,159 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 21:09:08,159 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 21:09:08,159 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 21:09:08,159 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 21:09:08,160 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 21:09:08,160 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 21:09:08,160 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 21:09:08,160 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 21:09:08,161 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 21:09:08,161 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 21:09:08,161 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:09:08,161 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 21:09:08,161 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 21:09:08,162 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 21:09:08,162 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 21:09:08,162 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 21:09:08,162 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 21:09:08,162 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-13 21:09:08,422 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 21:09:08,435 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 21:09:08,438 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 21:09:08,440 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 21:09:08,440 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 21:09:08,440 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec14_product28.cil.c [2019-10-13 21:09:08,496 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c16f3c21/306106abac8941278d1ab035ae49c94a/FLAG165549cff [2019-10-13 21:09:09,135 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 21:09:09,136 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec14_product28.cil.c [2019-10-13 21:09:09,156 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c16f3c21/306106abac8941278d1ab035ae49c94a/FLAG165549cff [2019-10-13 21:09:09,345 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c16f3c21/306106abac8941278d1ab035ae49c94a [2019-10-13 21:09:09,355 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 21:09:09,358 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 21:09:09,359 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 21:09:09,359 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 21:09:09,363 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 21:09:09,364 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:09:09" (1/1) ... [2019-10-13 21:09:09,366 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5293757 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:09, skipping insertion in model container [2019-10-13 21:09:09,367 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:09:09" (1/1) ... [2019-10-13 21:09:09,373 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 21:09:09,451 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 21:09:10,107 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:09:10,127 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 21:09:10,304 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:09:10,367 INFO L192 MainTranslator]: Completed translation [2019-10-13 21:09:10,368 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:10 WrapperNode [2019-10-13 21:09:10,368 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 21:09:10,369 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 21:09:10,370 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 21:09:10,370 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 21:09:10,387 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:10" (1/1) ... [2019-10-13 21:09:10,387 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:10" (1/1) ... [2019-10-13 21:09:10,426 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:10" (1/1) ... [2019-10-13 21:09:10,427 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:10" (1/1) ... [2019-10-13 21:09:10,487 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:10" (1/1) ... [2019-10-13 21:09:10,531 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:10" (1/1) ... [2019-10-13 21:09:10,553 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:10" (1/1) ... [2019-10-13 21:09:10,582 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 21:09:10,585 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 21:09:10,585 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 21:09:10,585 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 21:09:10,586 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:10" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:09:10,663 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 21:09:10,663 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 21:09:10,664 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-13 21:09:10,664 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-13 21:09:10,664 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-13 21:09:10,665 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-13 21:09:10,665 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-13 21:09:10,666 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification14_spec__1 [2019-10-13 21:09:10,666 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-10-13 21:09:10,666 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-10-13 21:09:10,667 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-10-13 21:09:10,667 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-10-13 21:09:10,667 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-10-13 21:09:10,668 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-10-13 21:09:10,668 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-10-13 21:09:10,668 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-10-13 21:09:10,670 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-10-13 21:09:10,671 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__weight [2019-10-13 21:09:10,671 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-10-13 21:09:10,671 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-10-13 21:09:10,671 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-10-13 21:09:10,671 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-10-13 21:09:10,672 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-10-13 21:09:10,672 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-10-13 21:09:10,672 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-10-13 21:09:10,672 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-10-13 21:09:10,672 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-10-13 21:09:10,673 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-10-13 21:09:10,673 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2019-10-13 21:09:10,673 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-10-13 21:09:10,673 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-10-13 21:09:10,673 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-10-13 21:09:10,674 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-10-13 21:09:10,674 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-10-13 21:09:10,674 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-10-13 21:09:10,674 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-10-13 21:09:10,675 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2019-10-13 21:09:10,675 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-13 21:09:10,675 INFO L138 BoogieDeclarations]: Found implementation of procedure printState__wrappee__executivefloor [2019-10-13 21:09:10,675 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-10-13 21:09:10,675 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-10-13 21:09:10,676 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2019-10-13 21:09:10,676 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloor [2019-10-13 21:09:10,676 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-13 21:09:10,676 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-10-13 21:09:10,676 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-10-13 21:09:10,676 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-10-13 21:09:10,677 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-10-13 21:09:10,677 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-10-13 21:09:10,678 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-10-13 21:09:10,678 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-10-13 21:09:10,678 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-10-13 21:09:10,678 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-13 21:09:10,678 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-10-13 21:09:10,678 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-10-13 21:09:10,679 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-10-13 21:09:10,679 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-13 21:09:10,679 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-10-13 21:09:10,679 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-13 21:09:10,679 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-13 21:09:10,679 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 21:09:10,680 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-13 21:09:10,680 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-10-13 21:09:10,680 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-10-13 21:09:10,680 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-10-13 21:09:10,680 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-10-13 21:09:10,681 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-10-13 21:09:10,681 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-10-13 21:09:10,681 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-10-13 21:09:10,681 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-10-13 21:09:10,682 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-10-13 21:09:10,682 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-10-13 21:09:10,682 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-13 21:09:10,683 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-13 21:09:10,683 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-13 21:09:10,683 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-13 21:09:10,683 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-13 21:09:10,683 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-13 21:09:10,684 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 21:09:10,684 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 21:09:10,684 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-13 21:09:10,685 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-13 21:09:10,685 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-13 21:09:10,685 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-13 21:09:10,686 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-13 21:09:10,686 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-10-13 21:09:10,686 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-10-13 21:09:10,687 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2019-10-13 21:09:10,687 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloor [2019-10-13 21:09:10,687 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification14_spec__1 [2019-10-13 21:09:10,687 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-10-13 21:09:10,688 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-10-13 21:09:10,688 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-10-13 21:09:10,688 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-13 21:09:10,688 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-10-13 21:09:10,688 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-10-13 21:09:10,688 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-10-13 21:09:10,689 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-10-13 21:09:10,689 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-10-13 21:09:10,689 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-10-13 21:09:10,689 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-10-13 21:09:10,689 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-13 21:09:10,690 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-10-13 21:09:10,690 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-10-13 21:09:10,690 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-10-13 21:09:10,690 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-10-13 21:09:10,690 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-10-13 21:09:10,690 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-10-13 21:09:10,691 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-10-13 21:09:10,691 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-10-13 21:09:10,691 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-10-13 21:09:10,691 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-10-13 21:09:10,691 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__weight [2019-10-13 21:09:10,692 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-10-13 21:09:10,692 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-10-13 21:09:10,692 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-10-13 21:09:10,692 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-10-13 21:09:10,693 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-10-13 21:09:10,693 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2019-10-13 21:09:10,693 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-10-13 21:09:10,693 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-10-13 21:09:10,694 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-10-13 21:09:10,694 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-10-13 21:09:10,695 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-10-13 21:09:10,695 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-10-13 21:09:10,696 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2019-10-13 21:09:10,696 INFO L130 BoogieDeclarations]: Found specification of procedure printState__wrappee__executivefloor [2019-10-13 21:09:10,696 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 21:09:10,696 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-10-13 21:09:10,696 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-10-13 21:09:10,697 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-10-13 21:09:10,697 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-10-13 21:09:10,697 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-13 21:09:10,697 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-13 21:09:10,698 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 21:09:10,698 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-10-13 21:09:10,699 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-10-13 21:09:10,702 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-10-13 21:09:10,702 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-10-13 21:09:10,702 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-10-13 21:09:10,703 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-10-13 21:09:10,703 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-10-13 21:09:10,704 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-10-13 21:09:10,704 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-10-13 21:09:10,712 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-13 21:09:10,712 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-10-13 21:09:10,712 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-13 21:09:10,712 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-13 21:09:10,713 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 21:09:10,713 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-10-13 21:09:10,713 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-10-13 21:09:10,713 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-10-13 21:09:10,713 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-13 21:09:10,713 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-13 21:09:10,713 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-13 21:09:10,714 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-13 21:09:10,714 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-13 21:09:10,714 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-13 21:09:10,714 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 21:09:10,715 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-13 21:09:10,715 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-13 21:09:10,715 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 21:09:10,715 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-13 21:09:10,715 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-13 21:09:10,716 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 21:09:10,716 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-13 21:09:10,716 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-13 21:09:10,716 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-13 21:09:10,716 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 21:09:10,716 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-13 21:09:10,716 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 21:09:13,112 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 21:09:13,112 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-13 21:09:13,114 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:09:13 BoogieIcfgContainer [2019-10-13 21:09:13,114 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 21:09:13,115 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 21:09:13,116 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 21:09:13,119 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 21:09:13,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:09:09" (1/3) ... [2019-10-13 21:09:13,120 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54e4e598 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:09:13, skipping insertion in model container [2019-10-13 21:09:13,120 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:10" (2/3) ... [2019-10-13 21:09:13,120 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54e4e598 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:09:13, skipping insertion in model container [2019-10-13 21:09:13,121 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:09:13" (3/3) ... [2019-10-13 21:09:13,122 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product28.cil.c [2019-10-13 21:09:13,132 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 21:09:13,142 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 21:09:13,154 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 21:09:13,199 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 21:09:13,199 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 21:09:13,199 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 21:09:13,199 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 21:09:13,199 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 21:09:13,200 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 21:09:13,200 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 21:09:13,200 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 21:09:13,245 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states. [2019-10-13 21:09:13,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-10-13 21:09:13,260 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:13,261 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 21:09:13,263 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:13,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:13,269 INFO L82 PathProgramCache]: Analyzing trace with hash 409688857, now seen corresponding path program 1 times [2019-10-13 21:09:13,278 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:13,278 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206094067] [2019-10-13 21:09:13,278 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:13,278 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:13,279 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:13,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:13,882 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 21:09:13,882 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206094067] [2019-10-13 21:09:13,883 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:09:13,884 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 21:09:13,884 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135603574] [2019-10-13 21:09:13,889 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:13,891 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:13,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:13,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:09:13,909 INFO L87 Difference]: Start difference. First operand 767 states. Second operand 4 states. [2019-10-13 21:09:14,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:14,136 INFO L93 Difference]: Finished difference Result 1218 states and 1946 transitions. [2019-10-13 21:09:14,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:09:14,138 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 87 [2019-10-13 21:09:14,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:14,175 INFO L225 Difference]: With dead ends: 1218 [2019-10-13 21:09:14,175 INFO L226 Difference]: Without dead ends: 612 [2019-10-13 21:09:14,188 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 21:09:14,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2019-10-13 21:09:14,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 612. [2019-10-13 21:09:14,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 612 states. [2019-10-13 21:09:14,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 964 transitions. [2019-10-13 21:09:14,319 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 964 transitions. Word has length 87 [2019-10-13 21:09:14,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:14,320 INFO L462 AbstractCegarLoop]: Abstraction has 612 states and 964 transitions. [2019-10-13 21:09:14,320 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:09:14,320 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 964 transitions. [2019-10-13 21:09:14,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-10-13 21:09:14,326 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:14,326 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:14,326 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:14,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:14,327 INFO L82 PathProgramCache]: Analyzing trace with hash -728771867, now seen corresponding path program 1 times [2019-10-13 21:09:14,327 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:14,327 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393169980] [2019-10-13 21:09:14,328 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:14,328 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:14,328 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:14,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:14,499 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 21:09:14,500 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393169980] [2019-10-13 21:09:14,500 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:09:14,500 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 21:09:14,501 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470737301] [2019-10-13 21:09:14,504 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:14,504 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:14,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:14,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:09:14,505 INFO L87 Difference]: Start difference. First operand 612 states and 964 transitions. Second operand 4 states. [2019-10-13 21:09:14,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:14,639 INFO L93 Difference]: Finished difference Result 1191 states and 1889 transitions. [2019-10-13 21:09:14,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:09:14,640 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 88 [2019-10-13 21:09:14,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:14,647 INFO L225 Difference]: With dead ends: 1191 [2019-10-13 21:09:14,648 INFO L226 Difference]: Without dead ends: 612 [2019-10-13 21:09:14,656 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 21:09:14,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2019-10-13 21:09:14,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 612. [2019-10-13 21:09:14,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 612 states. [2019-10-13 21:09:14,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 963 transitions. [2019-10-13 21:09:14,715 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 963 transitions. Word has length 88 [2019-10-13 21:09:14,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:14,716 INFO L462 AbstractCegarLoop]: Abstraction has 612 states and 963 transitions. [2019-10-13 21:09:14,724 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:09:14,724 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 963 transitions. [2019-10-13 21:09:14,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-10-13 21:09:14,735 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:14,735 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 21:09:14,736 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:14,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:14,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1257668075, now seen corresponding path program 1 times [2019-10-13 21:09:14,736 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:14,737 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653311718] [2019-10-13 21:09:14,737 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:14,737 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:14,737 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:14,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:15,015 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 21:09:15,015 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653311718] [2019-10-13 21:09:15,016 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:09:15,016 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 21:09:15,016 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142331347] [2019-10-13 21:09:15,019 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:15,019 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:15,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:15,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:09:15,020 INFO L87 Difference]: Start difference. First operand 612 states and 963 transitions. Second operand 4 states. [2019-10-13 21:09:15,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:15,105 INFO L93 Difference]: Finished difference Result 1191 states and 1888 transitions. [2019-10-13 21:09:15,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:09:15,106 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 89 [2019-10-13 21:09:15,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:15,113 INFO L225 Difference]: With dead ends: 1191 [2019-10-13 21:09:15,113 INFO L226 Difference]: Without dead ends: 612 [2019-10-13 21:09:15,116 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 21:09:15,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2019-10-13 21:09:15,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 612. [2019-10-13 21:09:15,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 612 states. [2019-10-13 21:09:15,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 962 transitions. [2019-10-13 21:09:15,154 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 962 transitions. Word has length 89 [2019-10-13 21:09:15,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:15,154 INFO L462 AbstractCegarLoop]: Abstraction has 612 states and 962 transitions. [2019-10-13 21:09:15,155 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:09:15,155 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 962 transitions. [2019-10-13 21:09:15,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-10-13 21:09:15,157 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:15,157 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 21:09:15,157 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:15,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:15,158 INFO L82 PathProgramCache]: Analyzing trace with hash -69933471, now seen corresponding path program 1 times [2019-10-13 21:09:15,158 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:15,158 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815834777] [2019-10-13 21:09:15,159 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:15,159 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:15,159 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:15,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:15,337 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 21:09:15,338 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815834777] [2019-10-13 21:09:15,338 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:09:15,338 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 21:09:15,338 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097357371] [2019-10-13 21:09:15,339 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:15,339 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:15,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:15,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:09:15,339 INFO L87 Difference]: Start difference. First operand 612 states and 962 transitions. Second operand 4 states. [2019-10-13 21:09:15,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:15,425 INFO L93 Difference]: Finished difference Result 1191 states and 1887 transitions. [2019-10-13 21:09:15,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:09:15,428 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 90 [2019-10-13 21:09:15,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:15,437 INFO L225 Difference]: With dead ends: 1191 [2019-10-13 21:09:15,437 INFO L226 Difference]: Without dead ends: 612 [2019-10-13 21:09:15,442 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 21:09:15,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2019-10-13 21:09:15,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 612. [2019-10-13 21:09:15,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 612 states. [2019-10-13 21:09:15,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 961 transitions. [2019-10-13 21:09:15,473 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 961 transitions. Word has length 90 [2019-10-13 21:09:15,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:15,474 INFO L462 AbstractCegarLoop]: Abstraction has 612 states and 961 transitions. [2019-10-13 21:09:15,474 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:09:15,474 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 961 transitions. [2019-10-13 21:09:15,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-10-13 21:09:15,482 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:15,482 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:15,482 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:15,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:15,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1501218543, now seen corresponding path program 1 times [2019-10-13 21:09:15,483 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:15,484 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42879877] [2019-10-13 21:09:15,484 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:15,484 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:15,484 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:15,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:15,592 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 21:09:15,592 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42879877] [2019-10-13 21:09:15,592 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:09:15,592 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 21:09:15,593 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217044981] [2019-10-13 21:09:15,593 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:15,593 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:15,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:15,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:09:15,594 INFO L87 Difference]: Start difference. First operand 612 states and 961 transitions. Second operand 4 states. [2019-10-13 21:09:15,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:15,662 INFO L93 Difference]: Finished difference Result 1191 states and 1886 transitions. [2019-10-13 21:09:15,663 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:09:15,663 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 91 [2019-10-13 21:09:15,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:15,668 INFO L225 Difference]: With dead ends: 1191 [2019-10-13 21:09:15,668 INFO L226 Difference]: Without dead ends: 612 [2019-10-13 21:09:15,672 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 21:09:15,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2019-10-13 21:09:15,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 612. [2019-10-13 21:09:15,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 612 states. [2019-10-13 21:09:15,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 960 transitions. [2019-10-13 21:09:15,745 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 960 transitions. Word has length 91 [2019-10-13 21:09:15,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:15,745 INFO L462 AbstractCegarLoop]: Abstraction has 612 states and 960 transitions. [2019-10-13 21:09:15,745 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:09:15,746 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 960 transitions. [2019-10-13 21:09:15,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2019-10-13 21:09:15,748 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:15,749 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:15,749 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:15,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:15,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1777232349, now seen corresponding path program 1 times [2019-10-13 21:09:15,750 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:15,750 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27575411] [2019-10-13 21:09:15,750 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:15,751 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:15,751 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:15,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:15,978 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 21:09:15,978 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27575411] [2019-10-13 21:09:15,979 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:09:15,979 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2019-10-13 21:09:15,979 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643990228] [2019-10-13 21:09:15,979 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-13 21:09:15,980 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:15,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-13 21:09:15,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2019-10-13 21:09:15,980 INFO L87 Difference]: Start difference. First operand 612 states and 960 transitions. Second operand 10 states. [2019-10-13 21:09:16,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:16,168 INFO L93 Difference]: Finished difference Result 1196 states and 1893 transitions. [2019-10-13 21:09:16,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 21:09:16,169 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 92 [2019-10-13 21:09:16,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:16,180 INFO L225 Difference]: With dead ends: 1196 [2019-10-13 21:09:16,180 INFO L226 Difference]: Without dead ends: 621 [2019-10-13 21:09:16,186 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:09:16,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2019-10-13 21:09:16,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 619. [2019-10-13 21:09:16,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 619 states. [2019-10-13 21:09:16,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 970 transitions. [2019-10-13 21:09:16,214 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 970 transitions. Word has length 92 [2019-10-13 21:09:16,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:16,214 INFO L462 AbstractCegarLoop]: Abstraction has 619 states and 970 transitions. [2019-10-13 21:09:16,214 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-13 21:09:16,215 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 970 transitions. [2019-10-13 21:09:16,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2019-10-13 21:09:16,217 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:16,217 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:16,217 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:16,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:16,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1878144316, now seen corresponding path program 1 times [2019-10-13 21:09:16,218 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:16,219 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350253536] [2019-10-13 21:09:16,219 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:16,220 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:16,220 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:16,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:16,320 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 21:09:16,321 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350253536] [2019-10-13 21:09:16,321 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:09:16,321 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 21:09:16,322 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896588434] [2019-10-13 21:09:16,322 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:16,322 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:16,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:16,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:09:16,324 INFO L87 Difference]: Start difference. First operand 619 states and 970 transitions. Second operand 4 states. [2019-10-13 21:09:16,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:16,406 INFO L93 Difference]: Finished difference Result 1197 states and 1894 transitions. [2019-10-13 21:09:16,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:09:16,406 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 92 [2019-10-13 21:09:16,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:16,413 INFO L225 Difference]: With dead ends: 1197 [2019-10-13 21:09:16,413 INFO L226 Difference]: Without dead ends: 615 [2019-10-13 21:09:16,418 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 21:09:16,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2019-10-13 21:09:16,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 615. [2019-10-13 21:09:16,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 615 states. [2019-10-13 21:09:16,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 963 transitions. [2019-10-13 21:09:16,451 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 963 transitions. Word has length 92 [2019-10-13 21:09:16,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:16,452 INFO L462 AbstractCegarLoop]: Abstraction has 615 states and 963 transitions. [2019-10-13 21:09:16,453 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:09:16,453 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 963 transitions. [2019-10-13 21:09:16,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-10-13 21:09:16,455 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:16,456 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:16,456 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:16,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:16,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1995337811, now seen corresponding path program 1 times [2019-10-13 21:09:16,457 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:16,457 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649940515] [2019-10-13 21:09:16,457 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:16,458 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:16,458 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:16,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:16,738 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 21:09:16,739 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649940515] [2019-10-13 21:09:16,739 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:09:16,740 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 21:09:16,740 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921381109] [2019-10-13 21:09:16,741 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 21:09:16,741 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:16,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 21:09:16,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:09:16,742 INFO L87 Difference]: Start difference. First operand 615 states and 963 transitions. Second operand 6 states. [2019-10-13 21:09:17,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:17,051 INFO L93 Difference]: Finished difference Result 1210 states and 1918 transitions. [2019-10-13 21:09:17,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 21:09:17,052 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 93 [2019-10-13 21:09:17,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:17,058 INFO L225 Difference]: With dead ends: 1210 [2019-10-13 21:09:17,058 INFO L226 Difference]: Without dead ends: 623 [2019-10-13 21:09:17,062 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:09:17,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2019-10-13 21:09:17,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 620. [2019-10-13 21:09:17,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 620 states. [2019-10-13 21:09:17,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 964 transitions. [2019-10-13 21:09:17,094 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 964 transitions. Word has length 93 [2019-10-13 21:09:17,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:17,095 INFO L462 AbstractCegarLoop]: Abstraction has 620 states and 964 transitions. [2019-10-13 21:09:17,099 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 21:09:17,099 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 964 transitions. [2019-10-13 21:09:17,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-10-13 21:09:17,100 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:17,101 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 21:09:17,101 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:17,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:17,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1824175936, now seen corresponding path program 1 times [2019-10-13 21:09:17,101 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:17,102 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116225842] [2019-10-13 21:09:17,102 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:17,102 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:17,102 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:17,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:17,239 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 21:09:17,240 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116225842] [2019-10-13 21:09:17,241 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:09:17,242 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 21:09:17,242 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809470905] [2019-10-13 21:09:17,242 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 21:09:17,243 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:17,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 21:09:17,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:09:17,243 INFO L87 Difference]: Start difference. First operand 620 states and 964 transitions. Second operand 6 states. [2019-10-13 21:09:17,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:17,527 INFO L93 Difference]: Finished difference Result 1173 states and 1833 transitions. [2019-10-13 21:09:17,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 21:09:17,527 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 94 [2019-10-13 21:09:17,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:17,534 INFO L225 Difference]: With dead ends: 1173 [2019-10-13 21:09:17,534 INFO L226 Difference]: Without dead ends: 620 [2019-10-13 21:09:17,537 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:09:17,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2019-10-13 21:09:17,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 620. [2019-10-13 21:09:17,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 620 states. [2019-10-13 21:09:17,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 960 transitions. [2019-10-13 21:09:17,562 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 960 transitions. Word has length 94 [2019-10-13 21:09:17,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:17,563 INFO L462 AbstractCegarLoop]: Abstraction has 620 states and 960 transitions. [2019-10-13 21:09:17,563 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 21:09:17,563 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 960 transitions. [2019-10-13 21:09:17,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-10-13 21:09:17,565 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:17,566 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 21:09:17,566 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:17,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:17,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1850857070, now seen corresponding path program 1 times [2019-10-13 21:09:17,566 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:17,567 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998720950] [2019-10-13 21:09:17,567 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:17,567 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:17,567 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:17,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:17,744 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 21:09:17,745 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998720950] [2019-10-13 21:09:17,746 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:09:17,746 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 21:09:17,747 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311965819] [2019-10-13 21:09:17,747 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 21:09:17,748 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:17,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 21:09:17,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:09:17,749 INFO L87 Difference]: Start difference. First operand 620 states and 960 transitions. Second operand 6 states. [2019-10-13 21:09:17,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:17,998 INFO L93 Difference]: Finished difference Result 1173 states and 1829 transitions. [2019-10-13 21:09:17,999 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 21:09:17,999 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 95 [2019-10-13 21:09:17,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:18,004 INFO L225 Difference]: With dead ends: 1173 [2019-10-13 21:09:18,004 INFO L226 Difference]: Without dead ends: 620 [2019-10-13 21:09:18,012 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:09:18,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2019-10-13 21:09:18,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 620. [2019-10-13 21:09:18,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 620 states. [2019-10-13 21:09:18,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 956 transitions. [2019-10-13 21:09:18,042 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 956 transitions. Word has length 95 [2019-10-13 21:09:18,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:18,042 INFO L462 AbstractCegarLoop]: Abstraction has 620 states and 956 transitions. [2019-10-13 21:09:18,042 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 21:09:18,042 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 956 transitions. [2019-10-13 21:09:18,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-10-13 21:09:18,044 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:18,044 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 21:09:18,044 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:18,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:18,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1548805650, now seen corresponding path program 1 times [2019-10-13 21:09:18,045 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:18,045 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979692230] [2019-10-13 21:09:18,045 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:18,045 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:18,046 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:18,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:18,171 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 21:09:18,172 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979692230] [2019-10-13 21:09:18,172 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:09:18,172 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 21:09:18,173 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866664360] [2019-10-13 21:09:18,173 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 21:09:18,173 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:18,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 21:09:18,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:09:18,174 INFO L87 Difference]: Start difference. First operand 620 states and 956 transitions. Second operand 7 states. [2019-10-13 21:09:18,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:18,313 INFO L93 Difference]: Finished difference Result 1176 states and 1829 transitions. [2019-10-13 21:09:18,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:09:18,313 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 95 [2019-10-13 21:09:18,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:18,319 INFO L225 Difference]: With dead ends: 1176 [2019-10-13 21:09:18,320 INFO L226 Difference]: Without dead ends: 602 [2019-10-13 21:09:18,323 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:09:18,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2019-10-13 21:09:18,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 599. [2019-10-13 21:09:18,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 599 states. [2019-10-13 21:09:18,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 919 transitions. [2019-10-13 21:09:18,357 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 919 transitions. Word has length 95 [2019-10-13 21:09:18,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:18,358 INFO L462 AbstractCegarLoop]: Abstraction has 599 states and 919 transitions. [2019-10-13 21:09:18,358 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 21:09:18,358 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 919 transitions. [2019-10-13 21:09:18,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-10-13 21:09:18,359 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:18,360 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:18,360 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:18,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:18,360 INFO L82 PathProgramCache]: Analyzing trace with hash 579263109, now seen corresponding path program 1 times [2019-10-13 21:09:18,361 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:18,361 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336244854] [2019-10-13 21:09:18,361 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:18,361 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:18,361 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:18,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:18,505 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 21:09:18,505 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336244854] [2019-10-13 21:09:18,506 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:09:18,506 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 21:09:18,506 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348089290] [2019-10-13 21:09:18,506 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 21:09:18,507 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:18,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 21:09:18,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:09:18,507 INFO L87 Difference]: Start difference. First operand 599 states and 919 transitions. Second operand 6 states. [2019-10-13 21:09:18,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:18,667 INFO L93 Difference]: Finished difference Result 1152 states and 1788 transitions. [2019-10-13 21:09:18,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 21:09:18,668 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 96 [2019-10-13 21:09:18,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:18,673 INFO L225 Difference]: With dead ends: 1152 [2019-10-13 21:09:18,674 INFO L226 Difference]: Without dead ends: 599 [2019-10-13 21:09:18,677 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:09:18,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2019-10-13 21:09:18,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 599. [2019-10-13 21:09:18,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 599 states. [2019-10-13 21:09:18,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 918 transitions. [2019-10-13 21:09:18,754 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 918 transitions. Word has length 96 [2019-10-13 21:09:18,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:18,755 INFO L462 AbstractCegarLoop]: Abstraction has 599 states and 918 transitions. [2019-10-13 21:09:18,755 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 21:09:18,755 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 918 transitions. [2019-10-13 21:09:18,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-10-13 21:09:18,757 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:18,757 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:18,757 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:18,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:18,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1860812663, now seen corresponding path program 1 times [2019-10-13 21:09:18,758 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:18,758 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58083512] [2019-10-13 21:09:18,759 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:18,759 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:18,759 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:18,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:18,883 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 21:09:18,883 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58083512] [2019-10-13 21:09:18,883 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:09:18,883 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 21:09:18,884 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735002589] [2019-10-13 21:09:18,884 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 21:09:18,884 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:18,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 21:09:18,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:09:18,885 INFO L87 Difference]: Start difference. First operand 599 states and 918 transitions. Second operand 6 states. [2019-10-13 21:09:19,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:19,012 INFO L93 Difference]: Finished difference Result 1152 states and 1787 transitions. [2019-10-13 21:09:19,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 21:09:19,012 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 97 [2019-10-13 21:09:19,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:19,017 INFO L225 Difference]: With dead ends: 1152 [2019-10-13 21:09:19,018 INFO L226 Difference]: Without dead ends: 599 [2019-10-13 21:09:19,021 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:09:19,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2019-10-13 21:09:19,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 599. [2019-10-13 21:09:19,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 599 states. [2019-10-13 21:09:19,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 917 transitions. [2019-10-13 21:09:19,051 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 917 transitions. Word has length 97 [2019-10-13 21:09:19,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:19,054 INFO L462 AbstractCegarLoop]: Abstraction has 599 states and 917 transitions. [2019-10-13 21:09:19,054 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 21:09:19,054 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 917 transitions. [2019-10-13 21:09:19,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-10-13 21:09:19,055 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:19,056 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:19,056 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:19,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:19,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1896411210, now seen corresponding path program 1 times [2019-10-13 21:09:19,057 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:19,057 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126406726] [2019-10-13 21:09:19,057 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:19,057 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:19,057 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:19,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:19,294 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 21:09:19,295 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126406726] [2019-10-13 21:09:19,295 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:09:19,295 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2019-10-13 21:09:19,296 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510354282] [2019-10-13 21:09:19,296 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 21:09:19,297 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:19,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 21:09:19,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2019-10-13 21:09:19,297 INFO L87 Difference]: Start difference. First operand 599 states and 917 transitions. Second operand 12 states. [2019-10-13 21:09:19,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:19,559 INFO L93 Difference]: Finished difference Result 1158 states and 1797 transitions. [2019-10-13 21:09:19,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 21:09:19,560 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 98 [2019-10-13 21:09:19,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:19,565 INFO L225 Difference]: With dead ends: 1158 [2019-10-13 21:09:19,565 INFO L226 Difference]: Without dead ends: 606 [2019-10-13 21:09:19,569 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:09:19,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2019-10-13 21:09:19,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 604. [2019-10-13 21:09:19,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 604 states. [2019-10-13 21:09:19,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 923 transitions. [2019-10-13 21:09:19,598 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 923 transitions. Word has length 98 [2019-10-13 21:09:19,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:19,600 INFO L462 AbstractCegarLoop]: Abstraction has 604 states and 923 transitions. [2019-10-13 21:09:19,600 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-13 21:09:19,600 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 923 transitions. [2019-10-13 21:09:19,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-10-13 21:09:19,601 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:19,602 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:19,602 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:19,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:19,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1663995072, now seen corresponding path program 1 times [2019-10-13 21:09:19,603 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:19,603 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706250215] [2019-10-13 21:09:19,603 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:19,603 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:19,603 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:19,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:19,737 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 21:09:19,738 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706250215] [2019-10-13 21:09:19,738 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:09:19,738 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 21:09:19,738 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49525431] [2019-10-13 21:09:19,739 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 21:09:19,740 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:19,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 21:09:19,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 21:09:19,742 INFO L87 Difference]: Start difference. First operand 604 states and 923 transitions. Second operand 3 states. [2019-10-13 21:09:19,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:19,900 INFO L93 Difference]: Finished difference Result 1688 states and 2646 transitions. [2019-10-13 21:09:19,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 21:09:19,901 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 99 [2019-10-13 21:09:19,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:19,933 INFO L225 Difference]: With dead ends: 1688 [2019-10-13 21:09:19,935 INFO L226 Difference]: Without dead ends: 1137 [2019-10-13 21:09:19,939 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 21:09:19,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1137 states. [2019-10-13 21:09:19,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1137 to 1065. [2019-10-13 21:09:19,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1065 states. [2019-10-13 21:09:19,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1065 states to 1065 states and 1661 transitions. [2019-10-13 21:09:19,992 INFO L78 Accepts]: Start accepts. Automaton has 1065 states and 1661 transitions. Word has length 99 [2019-10-13 21:09:19,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:19,992 INFO L462 AbstractCegarLoop]: Abstraction has 1065 states and 1661 transitions. [2019-10-13 21:09:19,992 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 21:09:19,993 INFO L276 IsEmpty]: Start isEmpty. Operand 1065 states and 1661 transitions. [2019-10-13 21:09:19,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2019-10-13 21:09:19,997 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:19,998 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-13 21:09:19,998 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:19,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:19,998 INFO L82 PathProgramCache]: Analyzing trace with hash 2131650664, now seen corresponding path program 1 times [2019-10-13 21:09:19,998 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:19,999 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242452970] [2019-10-13 21:09:19,999 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:19,999 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:19,999 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:20,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:20,218 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-13 21:09:20,223 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242452970] [2019-10-13 21:09:20,225 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361528793] [2019-10-13 21:09:20,226 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:20,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:20,750 INFO L256 TraceCheckSpWp]: Trace formula consists of 2893 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-13 21:09:20,767 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:21,057 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-13 21:09:21,058 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:21,367 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-13 21:09:21,367 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:21,367 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10, 6] total 15 [2019-10-13 21:09:21,368 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020660685] [2019-10-13 21:09:21,368 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 21:09:21,369 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:21,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 21:09:21,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2019-10-13 21:09:21,369 INFO L87 Difference]: Start difference. First operand 1065 states and 1661 transitions. Second operand 6 states. [2019-10-13 21:09:22,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:22,088 INFO L93 Difference]: Finished difference Result 2685 states and 4196 transitions. [2019-10-13 21:09:22,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:09:22,089 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 157 [2019-10-13 21:09:22,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:22,100 INFO L225 Difference]: With dead ends: 2685 [2019-10-13 21:09:22,101 INFO L226 Difference]: Without dead ends: 1673 [2019-10-13 21:09:22,107 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 306 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2019-10-13 21:09:22,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1673 states. [2019-10-13 21:09:22,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1673 to 1670. [2019-10-13 21:09:22,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1670 states. [2019-10-13 21:09:22,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1670 states to 1670 states and 2575 transitions. [2019-10-13 21:09:22,177 INFO L78 Accepts]: Start accepts. Automaton has 1670 states and 2575 transitions. Word has length 157 [2019-10-13 21:09:22,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:22,177 INFO L462 AbstractCegarLoop]: Abstraction has 1670 states and 2575 transitions. [2019-10-13 21:09:22,178 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 21:09:22,178 INFO L276 IsEmpty]: Start isEmpty. Operand 1670 states and 2575 transitions. [2019-10-13 21:09:22,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2019-10-13 21:09:22,183 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:22,183 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:22,396 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:22,396 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:22,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:22,397 INFO L82 PathProgramCache]: Analyzing trace with hash -352606121, now seen corresponding path program 1 times [2019-10-13 21:09:22,397 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:22,397 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421059193] [2019-10-13 21:09:22,397 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:22,397 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:22,397 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:22,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:22,683 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2019-10-13 21:09:22,684 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421059193] [2019-10-13 21:09:22,684 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69130261] [2019-10-13 21:09:22,685 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:23,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:23,320 INFO L256 TraceCheckSpWp]: Trace formula consists of 2890 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 21:09:23,344 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:23,425 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-13 21:09:23,425 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:23,883 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-10-13 21:09:23,883 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:23,884 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11, 6] total 18 [2019-10-13 21:09:23,884 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656282986] [2019-10-13 21:09:23,884 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:09:23,885 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:23,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:09:23,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2019-10-13 21:09:23,885 INFO L87 Difference]: Start difference. First operand 1670 states and 2575 transitions. Second operand 5 states. [2019-10-13 21:09:24,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:24,881 INFO L93 Difference]: Finished difference Result 3319 states and 5295 transitions. [2019-10-13 21:09:24,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 21:09:24,881 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 158 [2019-10-13 21:09:24,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:24,892 INFO L225 Difference]: With dead ends: 3319 [2019-10-13 21:09:24,892 INFO L226 Difference]: Without dead ends: 1702 [2019-10-13 21:09:24,901 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 316 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2019-10-13 21:09:24,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1702 states. [2019-10-13 21:09:24,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1702 to 1702. [2019-10-13 21:09:24,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1702 states. [2019-10-13 21:09:24,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1702 states to 1702 states and 2627 transitions. [2019-10-13 21:09:24,975 INFO L78 Accepts]: Start accepts. Automaton has 1702 states and 2627 transitions. Word has length 158 [2019-10-13 21:09:24,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:24,976 INFO L462 AbstractCegarLoop]: Abstraction has 1702 states and 2627 transitions. [2019-10-13 21:09:24,976 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:09:24,976 INFO L276 IsEmpty]: Start isEmpty. Operand 1702 states and 2627 transitions. [2019-10-13 21:09:24,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-10-13 21:09:24,981 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:24,982 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:25,189 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:25,189 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:25,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:25,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1773700941, now seen corresponding path program 1 times [2019-10-13 21:09:25,190 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:25,190 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222547322] [2019-10-13 21:09:25,190 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:25,190 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:25,190 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:25,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:25,319 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2019-10-13 21:09:25,319 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222547322] [2019-10-13 21:09:25,319 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:09:25,319 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 21:09:25,320 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391879827] [2019-10-13 21:09:25,321 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:09:25,321 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:25,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:09:25,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 21:09:25,322 INFO L87 Difference]: Start difference. First operand 1702 states and 2627 transitions. Second operand 5 states. [2019-10-13 21:09:28,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:28,971 INFO L93 Difference]: Finished difference Result 3841 states and 5946 transitions. [2019-10-13 21:09:28,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 21:09:28,971 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 161 [2019-10-13 21:09:28,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:28,986 INFO L225 Difference]: With dead ends: 3841 [2019-10-13 21:09:28,987 INFO L226 Difference]: Without dead ends: 2195 [2019-10-13 21:09:28,994 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:09:28,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2195 states. [2019-10-13 21:09:29,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2195 to 2115. [2019-10-13 21:09:29,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2115 states. [2019-10-13 21:09:29,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2115 states to 2115 states and 3248 transitions. [2019-10-13 21:09:29,088 INFO L78 Accepts]: Start accepts. Automaton has 2115 states and 3248 transitions. Word has length 161 [2019-10-13 21:09:29,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:29,089 INFO L462 AbstractCegarLoop]: Abstraction has 2115 states and 3248 transitions. [2019-10-13 21:09:29,089 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:09:29,089 INFO L276 IsEmpty]: Start isEmpty. Operand 2115 states and 3248 transitions. [2019-10-13 21:09:29,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-10-13 21:09:29,093 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:29,094 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:29,094 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:29,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:29,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1567326197, now seen corresponding path program 1 times [2019-10-13 21:09:29,095 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:29,095 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174377881] [2019-10-13 21:09:29,095 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:29,095 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:29,095 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:29,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:29,309 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-10-13 21:09:29,309 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174377881] [2019-10-13 21:09:29,309 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705534454] [2019-10-13 21:09:29,310 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:29,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:29,837 INFO L256 TraceCheckSpWp]: Trace formula consists of 2896 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 21:09:29,845 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:29,908 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-13 21:09:29,909 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:30,260 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-10-13 21:09:30,260 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:30,261 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6] total 13 [2019-10-13 21:09:30,261 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339350808] [2019-10-13 21:09:30,262 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:09:30,262 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:30,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:09:30,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2019-10-13 21:09:30,262 INFO L87 Difference]: Start difference. First operand 2115 states and 3248 transitions. Second operand 5 states. [2019-10-13 21:09:31,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:31,282 INFO L93 Difference]: Finished difference Result 4225 states and 6712 transitions. [2019-10-13 21:09:31,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 21:09:31,282 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 161 [2019-10-13 21:09:31,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:31,306 INFO L225 Difference]: With dead ends: 4225 [2019-10-13 21:09:31,306 INFO L226 Difference]: Without dead ends: 2163 [2019-10-13 21:09:31,323 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 311 SyntacticMatches, 7 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:09:31,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2163 states. [2019-10-13 21:09:31,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2163 to 2163. [2019-10-13 21:09:31,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2163 states. [2019-10-13 21:09:31,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2163 states to 2163 states and 3326 transitions. [2019-10-13 21:09:31,491 INFO L78 Accepts]: Start accepts. Automaton has 2163 states and 3326 transitions. Word has length 161 [2019-10-13 21:09:31,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:31,491 INFO L462 AbstractCegarLoop]: Abstraction has 2163 states and 3326 transitions. [2019-10-13 21:09:31,491 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:09:31,492 INFO L276 IsEmpty]: Start isEmpty. Operand 2163 states and 3326 transitions. [2019-10-13 21:09:31,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2019-10-13 21:09:31,498 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:31,498 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:31,704 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:31,705 INFO L410 AbstractCegarLoop]: === Iteration 20 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:31,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:31,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1359183901, now seen corresponding path program 1 times [2019-10-13 21:09:31,707 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:31,707 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584624326] [2019-10-13 21:09:31,708 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:31,708 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:31,708 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:31,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:31,894 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-10-13 21:09:31,895 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584624326] [2019-10-13 21:09:31,895 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013674707] [2019-10-13 21:09:31,895 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:32,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:32,536 INFO L256 TraceCheckSpWp]: Trace formula consists of 2899 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 21:09:32,544 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:32,633 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-10-13 21:09:32,633 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:33,033 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2019-10-13 21:09:33,033 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:33,034 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11, 6] total 18 [2019-10-13 21:09:33,034 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218800939] [2019-10-13 21:09:33,036 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:09:33,036 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:33,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:09:33,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2019-10-13 21:09:33,037 INFO L87 Difference]: Start difference. First operand 2163 states and 3326 transitions. Second operand 5 states. [2019-10-13 21:09:33,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:33,991 INFO L93 Difference]: Finished difference Result 4321 states and 6854 transitions. [2019-10-13 21:09:33,991 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 21:09:33,992 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 164 [2019-10-13 21:09:33,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:34,007 INFO L225 Difference]: With dead ends: 4321 [2019-10-13 21:09:34,007 INFO L226 Difference]: Without dead ends: 2211 [2019-10-13 21:09:34,018 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 328 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2019-10-13 21:09:34,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2211 states. [2019-10-13 21:09:34,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2211 to 2211. [2019-10-13 21:09:34,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2211 states. [2019-10-13 21:09:34,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2211 states to 2211 states and 3404 transitions. [2019-10-13 21:09:34,100 INFO L78 Accepts]: Start accepts. Automaton has 2211 states and 3404 transitions. Word has length 164 [2019-10-13 21:09:34,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:34,102 INFO L462 AbstractCegarLoop]: Abstraction has 2211 states and 3404 transitions. [2019-10-13 21:09:34,102 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:09:34,103 INFO L276 IsEmpty]: Start isEmpty. Operand 2211 states and 3404 transitions. [2019-10-13 21:09:34,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2019-10-13 21:09:34,107 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:34,108 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:34,309 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:34,310 INFO L410 AbstractCegarLoop]: === Iteration 21 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:34,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:34,310 INFO L82 PathProgramCache]: Analyzing trace with hash 759073009, now seen corresponding path program 1 times [2019-10-13 21:09:34,310 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:34,311 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787991083] [2019-10-13 21:09:34,311 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:34,311 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:34,311 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:34,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:34,509 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-10-13 21:09:34,509 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787991083] [2019-10-13 21:09:34,510 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310747351] [2019-10-13 21:09:34,510 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:35,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:35,073 INFO L256 TraceCheckSpWp]: Trace formula consists of 2902 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 21:09:35,078 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:35,155 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-10-13 21:09:35,155 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:35,727 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-13 21:09:35,728 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:35,728 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11, 6] total 17 [2019-10-13 21:09:35,729 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040180481] [2019-10-13 21:09:35,730 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:09:35,730 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:35,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:09:35,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2019-10-13 21:09:35,731 INFO L87 Difference]: Start difference. First operand 2211 states and 3404 transitions. Second operand 5 states. [2019-10-13 21:09:36,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:36,754 INFO L93 Difference]: Finished difference Result 4417 states and 6996 transitions. [2019-10-13 21:09:36,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 21:09:36,758 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 167 [2019-10-13 21:09:36,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:36,772 INFO L225 Difference]: With dead ends: 4417 [2019-10-13 21:09:36,772 INFO L226 Difference]: Without dead ends: 2259 [2019-10-13 21:09:36,782 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 334 SyntacticMatches, 6 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2019-10-13 21:09:36,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2259 states. [2019-10-13 21:09:36,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2259 to 2259. [2019-10-13 21:09:36,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2259 states. [2019-10-13 21:09:36,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2259 states to 2259 states and 3482 transitions. [2019-10-13 21:09:36,863 INFO L78 Accepts]: Start accepts. Automaton has 2259 states and 3482 transitions. Word has length 167 [2019-10-13 21:09:36,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:36,864 INFO L462 AbstractCegarLoop]: Abstraction has 2259 states and 3482 transitions. [2019-10-13 21:09:36,864 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:09:36,864 INFO L276 IsEmpty]: Start isEmpty. Operand 2259 states and 3482 transitions. [2019-10-13 21:09:36,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2019-10-13 21:09:36,874 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:36,875 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:37,090 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:37,090 INFO L410 AbstractCegarLoop]: === Iteration 22 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:37,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:37,091 INFO L82 PathProgramCache]: Analyzing trace with hash 2093169185, now seen corresponding path program 1 times [2019-10-13 21:09:37,091 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:37,091 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352617511] [2019-10-13 21:09:37,091 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:37,091 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:37,091 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:37,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:37,270 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2019-10-13 21:09:37,270 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352617511] [2019-10-13 21:09:37,270 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157053432] [2019-10-13 21:09:37,271 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:37,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:37,883 INFO L256 TraceCheckSpWp]: Trace formula consists of 2905 conjuncts, 33 conjunts are in the unsatisfiable core [2019-10-13 21:09:37,889 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:37,997 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:09:37,998 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:38,328 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-10-13 21:09:38,328 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:09:38,329 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [11] total 18 [2019-10-13 21:09:38,329 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830432729] [2019-10-13 21:09:38,330 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 21:09:38,330 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:38,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 21:09:38,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2019-10-13 21:09:38,331 INFO L87 Difference]: Start difference. First operand 2259 states and 3482 transitions. Second operand 9 states.