/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/product-lines/elevator_spec14_product11.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 00:39:12,444 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 00:39:12,447 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 00:39:12,462 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 00:39:12,462 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 00:39:12,463 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 00:39:12,465 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 00:39:12,467 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 00:39:12,469 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 00:39:12,469 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 00:39:12,470 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 00:39:12,471 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 00:39:12,472 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 00:39:12,473 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 00:39:12,474 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 00:39:12,475 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 00:39:12,476 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 00:39:12,477 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 00:39:12,478 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 00:39:12,480 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 00:39:12,482 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 00:39:12,483 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 00:39:12,484 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 00:39:12,485 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 00:39:12,487 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-07 00:39:12,487 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-07 00:39:12,488 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-07 00:39:12,488 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-07 00:39:12,489 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-07 00:39:12,490 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-07 00:39:12,490 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-07 00:39:12,491 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-07 00:39:12,492 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-07 00:39:12,492 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-07 00:39:12,493 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-07 00:39:12,494 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-07 00:39:12,494 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-07 00:39:12,494 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-07 00:39:12,495 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 00:39:12,496 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 00:39:12,496 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 00:39:12,497 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-07 00:39:12,513 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 00:39:12,513 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 00:39:12,514 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 00:39:12,515 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 00:39:12,515 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 00:39:12,515 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 00:39:12,515 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 00:39:12,516 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 00:39:12,516 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 00:39:12,516 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 00:39:12,516 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 00:39:12,516 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 00:39:12,516 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 00:39:12,517 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 00:39:12,517 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 00:39:12,517 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 00:39:12,517 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 00:39:12,517 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 00:39:12,518 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 00:39:12,518 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 00:39:12,518 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 00:39:12,518 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 00:39:12,518 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 00:39:12,519 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 00:39:12,519 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 00:39:12,519 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 00:39:12,519 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 00:39:12,519 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 00:39:12,520 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-11-07 00:39:12,822 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 00:39:12,842 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 00:39:12,845 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 00:39:12,847 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 00:39:12,847 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 00:39:12,848 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec14_product11.cil.c [2019-11-07 00:39:12,921 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25e32b725/5331ec132ad14ecfa6ec738bcef5aa8b/FLAG96032b38d [2019-11-07 00:39:13,557 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 00:39:13,558 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec14_product11.cil.c [2019-11-07 00:39:13,576 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25e32b725/5331ec132ad14ecfa6ec738bcef5aa8b/FLAG96032b38d [2019-11-07 00:39:13,765 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25e32b725/5331ec132ad14ecfa6ec738bcef5aa8b [2019-11-07 00:39:13,773 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 00:39:13,774 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 00:39:13,775 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 00:39:13,775 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 00:39:13,779 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 00:39:13,780 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:39:13" (1/1) ... [2019-11-07 00:39:13,782 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16372189 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:13, skipping insertion in model container [2019-11-07 00:39:13,783 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:39:13" (1/1) ... [2019-11-07 00:39:13,795 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 00:39:13,908 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 00:39:14,631 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 00:39:14,654 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 00:39:14,781 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 00:39:14,855 INFO L192 MainTranslator]: Completed translation [2019-11-07 00:39:14,855 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:14 WrapperNode [2019-11-07 00:39:14,855 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 00:39:14,856 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 00:39:14,856 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 00:39:14,856 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 00:39:14,870 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:14" (1/1) ... [2019-11-07 00:39:14,871 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:14" (1/1) ... [2019-11-07 00:39:14,910 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:14" (1/1) ... [2019-11-07 00:39:14,911 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:14" (1/1) ... [2019-11-07 00:39:14,978 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:14" (1/1) ... [2019-11-07 00:39:15,009 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:14" (1/1) ... [2019-11-07 00:39:15,032 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:14" (1/1) ... [2019-11-07 00:39:15,062 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 00:39:15,063 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 00:39:15,063 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 00:39:15,064 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 00:39:15,067 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:14" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 00:39:15,143 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 00:39:15,143 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 00:39:15,143 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-11-07 00:39:15,144 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-11-07 00:39:15,144 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-11-07 00:39:15,145 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-11-07 00:39:15,145 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-11-07 00:39:15,145 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-11-07 00:39:15,146 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-11-07 00:39:15,146 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-11-07 00:39:15,147 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-11-07 00:39:15,147 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-11-07 00:39:15,147 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-11-07 00:39:15,148 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification14_spec__1 [2019-11-07 00:39:15,148 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-11-07 00:39:15,149 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-11-07 00:39:15,151 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-11-07 00:39:15,151 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-11-07 00:39:15,152 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-11-07 00:39:15,152 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-11-07 00:39:15,153 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-11-07 00:39:15,153 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-11-07 00:39:15,154 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-11-07 00:39:15,154 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-11-07 00:39:15,154 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-11-07 00:39:15,154 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-11-07 00:39:15,154 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-11-07 00:39:15,155 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-11-07 00:39:15,155 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-11-07 00:39:15,155 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-11-07 00:39:15,155 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 00:39:15,155 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-11-07 00:39:15,155 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-11-07 00:39:15,156 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-11-07 00:39:15,156 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-11-07 00:39:15,156 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-11-07 00:39:15,156 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-11-07 00:39:15,157 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-11-07 00:39:15,157 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-11-07 00:39:15,157 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-11-07 00:39:15,157 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-11-07 00:39:15,157 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-11-07 00:39:15,158 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-11-07 00:39:15,158 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-11-07 00:39:15,158 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-11-07 00:39:15,158 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-11-07 00:39:15,158 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-11-07 00:39:15,158 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-11-07 00:39:15,159 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-11-07 00:39:15,159 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-11-07 00:39:15,159 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-11-07 00:39:15,159 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-11-07 00:39:15,159 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-11-07 00:39:15,159 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-11-07 00:39:15,160 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-11-07 00:39:15,160 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-11-07 00:39:15,160 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-11-07 00:39:15,160 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-11-07 00:39:15,160 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-11-07 00:39:15,161 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-11-07 00:39:15,161 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2019-11-07 00:39:15,161 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-11-07 00:39:15,162 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-11-07 00:39:15,162 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-11-07 00:39:15,162 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-11-07 00:39:15,163 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-11-07 00:39:15,163 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-11-07 00:39:15,163 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-11-07 00:39:15,163 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-11-07 00:39:15,163 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-11-07 00:39:15,163 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-11-07 00:39:15,164 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2019-11-07 00:39:15,164 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloor [2019-11-07 00:39:15,165 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-11-07 00:39:15,165 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 00:39:15,165 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 00:39:15,165 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-11-07 00:39:15,166 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-11-07 00:39:15,166 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-11-07 00:39:15,167 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-11-07 00:39:15,167 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-11-07 00:39:15,167 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-11-07 00:39:15,167 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-11-07 00:39:15,167 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-11-07 00:39:15,168 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-11-07 00:39:15,168 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-11-07 00:39:15,169 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-11-07 00:39:15,169 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-11-07 00:39:15,170 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-11-07 00:39:15,170 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-11-07 00:39:15,170 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-11-07 00:39:15,170 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-11-07 00:39:15,170 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-11-07 00:39:15,171 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-11-07 00:39:15,171 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2019-11-07 00:39:15,171 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloor [2019-11-07 00:39:15,171 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification14_spec__1 [2019-11-07 00:39:15,171 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-07 00:39:15,172 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-11-07 00:39:15,172 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-11-07 00:39:15,172 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-11-07 00:39:15,172 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-11-07 00:39:15,172 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-11-07 00:39:15,172 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-11-07 00:39:15,173 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-11-07 00:39:15,173 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-11-07 00:39:15,173 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-11-07 00:39:15,173 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-11-07 00:39:15,173 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-11-07 00:39:15,174 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-11-07 00:39:15,174 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-11-07 00:39:15,174 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-11-07 00:39:15,174 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-11-07 00:39:15,174 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-11-07 00:39:15,174 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-11-07 00:39:15,175 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-11-07 00:39:15,175 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 00:39:15,176 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-11-07 00:39:15,176 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-07 00:39:15,176 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-07 00:39:15,177 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-11-07 00:39:15,177 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-07 00:39:15,177 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-07 00:39:15,177 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 00:39:15,179 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-07 00:39:15,179 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-11-07 00:39:15,179 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 00:39:15,179 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-11-07 00:39:15,179 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-11-07 00:39:15,180 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 00:39:15,180 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-11-07 00:39:15,180 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-11-07 00:39:15,181 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 00:39:15,181 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-11-07 00:39:15,181 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-11-07 00:39:15,181 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-11-07 00:39:15,182 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-11-07 00:39:15,186 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-11-07 00:39:15,186 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-11-07 00:39:15,190 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-11-07 00:39:15,190 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-11-07 00:39:15,191 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-11-07 00:39:15,191 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-11-07 00:39:15,192 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-11-07 00:39:15,197 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-11-07 00:39:15,197 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-11-07 00:39:15,197 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-11-07 00:39:15,198 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-11-07 00:39:15,198 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-11-07 00:39:15,198 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-11-07 00:39:15,198 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-11-07 00:39:15,198 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-11-07 00:39:15,198 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2019-11-07 00:39:15,199 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-11-07 00:39:15,199 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-11-07 00:39:15,200 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-11-07 00:39:15,200 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-11-07 00:39:15,200 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-11-07 00:39:15,200 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-11-07 00:39:15,200 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-11-07 00:39:15,200 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 00:39:15,201 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-07 00:39:15,201 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 00:39:17,596 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 00:39:17,597 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-11-07 00:39:17,599 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:39:17 BoogieIcfgContainer [2019-11-07 00:39:17,599 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 00:39:17,600 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 00:39:17,600 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 00:39:17,604 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 00:39:17,604 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:39:13" (1/3) ... [2019-11-07 00:39:17,605 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5146cecd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:39:17, skipping insertion in model container [2019-11-07 00:39:17,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:14" (2/3) ... [2019-11-07 00:39:17,606 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5146cecd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:39:17, skipping insertion in model container [2019-11-07 00:39:17,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:39:17" (3/3) ... [2019-11-07 00:39:17,607 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product11.cil.c [2019-11-07 00:39:17,618 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 00:39:17,627 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 00:39:17,639 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 00:39:17,678 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 00:39:17,678 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 00:39:17,678 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 00:39:17,678 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 00:39:17,678 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 00:39:17,678 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 00:39:17,678 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 00:39:17,679 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 00:39:17,721 INFO L276 IsEmpty]: Start isEmpty. Operand 730 states. [2019-11-07 00:39:17,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-11-07 00:39:17,748 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:17,750 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:39:17,752 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:17,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:17,756 INFO L82 PathProgramCache]: Analyzing trace with hash -2137869489, now seen corresponding path program 1 times [2019-11-07 00:39:17,765 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:17,765 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295525132] [2019-11-07 00:39:17,765 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:18,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:18,435 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-07 00:39:18,435 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295525132] [2019-11-07 00:39:18,437 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:18,437 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 00:39:18,438 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265716299] [2019-11-07 00:39:18,443 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:39:18,445 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:18,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:39:18,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 00:39:18,462 INFO L87 Difference]: Start difference. First operand 730 states. Second operand 4 states. [2019-11-07 00:39:18,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:18,704 INFO L93 Difference]: Finished difference Result 1158 states and 1864 transitions. [2019-11-07 00:39:18,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:39:18,706 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 135 [2019-11-07 00:39:18,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:18,742 INFO L225 Difference]: With dead ends: 1158 [2019-11-07 00:39:18,742 INFO L226 Difference]: Without dead ends: 582 [2019-11-07 00:39:18,756 INFO L630 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 [2019-11-07 00:39:18,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2019-11-07 00:39:18,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 582. [2019-11-07 00:39:18,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 582 states. [2019-11-07 00:39:18,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 923 transitions. [2019-11-07 00:39:18,885 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 923 transitions. Word has length 135 [2019-11-07 00:39:18,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:18,886 INFO L462 AbstractCegarLoop]: Abstraction has 582 states and 923 transitions. [2019-11-07 00:39:18,886 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:39:18,886 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 923 transitions. [2019-11-07 00:39:18,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-11-07 00:39:18,901 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:18,902 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:39:18,903 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:18,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:18,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1566459786, now seen corresponding path program 1 times [2019-11-07 00:39:18,904 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:18,904 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36589368] [2019-11-07 00:39:18,904 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:18,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:19,133 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-07 00:39:19,134 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36589368] [2019-11-07 00:39:19,134 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:19,135 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 00:39:19,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466414557] [2019-11-07 00:39:19,139 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:39:19,139 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:19,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:39:19,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 00:39:19,140 INFO L87 Difference]: Start difference. First operand 582 states and 923 transitions. Second operand 4 states. [2019-11-07 00:39:19,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:19,222 INFO L93 Difference]: Finished difference Result 1131 states and 1807 transitions. [2019-11-07 00:39:19,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 00:39:19,222 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 136 [2019-11-07 00:39:19,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:19,227 INFO L225 Difference]: With dead ends: 1131 [2019-11-07 00:39:19,228 INFO L226 Difference]: Without dead ends: 582 [2019-11-07 00:39:19,231 INFO L630 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 [2019-11-07 00:39:19,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2019-11-07 00:39:19,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 582. [2019-11-07 00:39:19,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 582 states. [2019-11-07 00:39:19,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 922 transitions. [2019-11-07 00:39:19,274 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 922 transitions. Word has length 136 [2019-11-07 00:39:19,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:19,277 INFO L462 AbstractCegarLoop]: Abstraction has 582 states and 922 transitions. [2019-11-07 00:39:19,277 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:39:19,277 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 922 transitions. [2019-11-07 00:39:19,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-11-07 00:39:19,287 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:19,292 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:39:19,292 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:19,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:19,292 INFO L82 PathProgramCache]: Analyzing trace with hash 785186859, now seen corresponding path program 1 times [2019-11-07 00:39:19,293 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:19,293 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738179748] [2019-11-07 00:39:19,293 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:19,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:19,464 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-07 00:39:19,464 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738179748] [2019-11-07 00:39:19,464 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:19,465 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 00:39:19,465 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204962456] [2019-11-07 00:39:19,465 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:39:19,466 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:19,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:39:19,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 00:39:19,466 INFO L87 Difference]: Start difference. First operand 582 states and 922 transitions. Second operand 4 states. [2019-11-07 00:39:19,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:19,533 INFO L93 Difference]: Finished difference Result 1131 states and 1806 transitions. [2019-11-07 00:39:19,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 00:39:19,534 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 137 [2019-11-07 00:39:19,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:19,539 INFO L225 Difference]: With dead ends: 1131 [2019-11-07 00:39:19,539 INFO L226 Difference]: Without dead ends: 582 [2019-11-07 00:39:19,542 INFO L630 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 [2019-11-07 00:39:19,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2019-11-07 00:39:19,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 582. [2019-11-07 00:39:19,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 582 states. [2019-11-07 00:39:19,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 921 transitions. [2019-11-07 00:39:19,568 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 921 transitions. Word has length 137 [2019-11-07 00:39:19,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:19,569 INFO L462 AbstractCegarLoop]: Abstraction has 582 states and 921 transitions. [2019-11-07 00:39:19,569 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:39:19,569 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 921 transitions. [2019-11-07 00:39:19,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-11-07 00:39:19,573 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:19,573 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:39:19,574 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:19,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:19,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1610800858, now seen corresponding path program 1 times [2019-11-07 00:39:19,574 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:19,575 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909589844] [2019-11-07 00:39:19,575 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:19,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:19,702 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-07 00:39:19,702 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909589844] [2019-11-07 00:39:19,702 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:19,702 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 00:39:19,703 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47738112] [2019-11-07 00:39:19,703 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:39:19,703 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:19,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:39:19,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 00:39:19,704 INFO L87 Difference]: Start difference. First operand 582 states and 921 transitions. Second operand 4 states. [2019-11-07 00:39:19,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:19,767 INFO L93 Difference]: Finished difference Result 1131 states and 1805 transitions. [2019-11-07 00:39:19,767 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 00:39:19,768 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 138 [2019-11-07 00:39:19,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:19,772 INFO L225 Difference]: With dead ends: 1131 [2019-11-07 00:39:19,772 INFO L226 Difference]: Without dead ends: 582 [2019-11-07 00:39:19,775 INFO L630 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 [2019-11-07 00:39:19,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2019-11-07 00:39:19,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 582. [2019-11-07 00:39:19,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 582 states. [2019-11-07 00:39:19,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 920 transitions. [2019-11-07 00:39:19,803 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 920 transitions. Word has length 138 [2019-11-07 00:39:19,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:19,803 INFO L462 AbstractCegarLoop]: Abstraction has 582 states and 920 transitions. [2019-11-07 00:39:19,803 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:39:19,804 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 920 transitions. [2019-11-07 00:39:19,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2019-11-07 00:39:19,808 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:19,808 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:39:19,808 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:19,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:19,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1771627783, now seen corresponding path program 1 times [2019-11-07 00:39:19,809 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:19,809 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971185044] [2019-11-07 00:39:19,809 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:19,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:20,001 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-07 00:39:20,002 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971185044] [2019-11-07 00:39:20,002 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:20,002 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 00:39:20,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756677426] [2019-11-07 00:39:20,003 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:39:20,003 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:20,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:39:20,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 00:39:20,004 INFO L87 Difference]: Start difference. First operand 582 states and 920 transitions. Second operand 4 states. [2019-11-07 00:39:20,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:20,092 INFO L93 Difference]: Finished difference Result 1131 states and 1804 transitions. [2019-11-07 00:39:20,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 00:39:20,093 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 139 [2019-11-07 00:39:20,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:20,109 INFO L225 Difference]: With dead ends: 1131 [2019-11-07 00:39:20,109 INFO L226 Difference]: Without dead ends: 582 [2019-11-07 00:39:20,113 INFO L630 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 [2019-11-07 00:39:20,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2019-11-07 00:39:20,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 582. [2019-11-07 00:39:20,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 582 states. [2019-11-07 00:39:20,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 919 transitions. [2019-11-07 00:39:20,148 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 919 transitions. Word has length 139 [2019-11-07 00:39:20,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:20,148 INFO L462 AbstractCegarLoop]: Abstraction has 582 states and 919 transitions. [2019-11-07 00:39:20,149 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:39:20,149 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 919 transitions. [2019-11-07 00:39:20,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-11-07 00:39:20,153 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:20,153 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:39:20,153 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:20,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:20,154 INFO L82 PathProgramCache]: Analyzing trace with hash -398630206, now seen corresponding path program 1 times [2019-11-07 00:39:20,154 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:20,154 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677474590] [2019-11-07 00:39:20,154 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:20,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:20,342 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-07 00:39:20,344 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677474590] [2019-11-07 00:39:20,345 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:20,345 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2019-11-07 00:39:20,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969911716] [2019-11-07 00:39:20,346 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-07 00:39:20,346 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:20,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-07 00:39:20,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2019-11-07 00:39:20,347 INFO L87 Difference]: Start difference. First operand 582 states and 919 transitions. Second operand 10 states. [2019-11-07 00:39:20,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:20,528 INFO L93 Difference]: Finished difference Result 1136 states and 1811 transitions. [2019-11-07 00:39:20,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-07 00:39:20,529 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 140 [2019-11-07 00:39:20,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:20,537 INFO L225 Difference]: With dead ends: 1136 [2019-11-07 00:39:20,537 INFO L226 Difference]: Without dead ends: 591 [2019-11-07 00:39:20,540 INFO L630 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 [2019-11-07 00:39:20,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2019-11-07 00:39:20,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 589. [2019-11-07 00:39:20,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 589 states. [2019-11-07 00:39:20,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 929 transitions. [2019-11-07 00:39:20,566 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 929 transitions. Word has length 140 [2019-11-07 00:39:20,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:20,567 INFO L462 AbstractCegarLoop]: Abstraction has 589 states and 929 transitions. [2019-11-07 00:39:20,567 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-07 00:39:20,567 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 929 transitions. [2019-11-07 00:39:20,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-11-07 00:39:20,571 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:20,571 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:39:20,572 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:20,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:20,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1385212895, now seen corresponding path program 1 times [2019-11-07 00:39:20,572 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:20,572 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586604229] [2019-11-07 00:39:20,573 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:20,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:20,750 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-07 00:39:20,751 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586604229] [2019-11-07 00:39:20,751 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:20,751 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 00:39:20,752 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094148482] [2019-11-07 00:39:20,752 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:39:20,752 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:20,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:39:20,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 00:39:20,753 INFO L87 Difference]: Start difference. First operand 589 states and 929 transitions. Second operand 4 states. [2019-11-07 00:39:20,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:20,819 INFO L93 Difference]: Finished difference Result 1137 states and 1812 transitions. [2019-11-07 00:39:20,820 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:39:20,820 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 140 [2019-11-07 00:39:20,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:20,826 INFO L225 Difference]: With dead ends: 1137 [2019-11-07 00:39:20,826 INFO L226 Difference]: Without dead ends: 585 [2019-11-07 00:39:20,830 INFO L630 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 [2019-11-07 00:39:20,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2019-11-07 00:39:20,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 585. [2019-11-07 00:39:20,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 585 states. [2019-11-07 00:39:20,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 922 transitions. [2019-11-07 00:39:20,857 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 922 transitions. Word has length 140 [2019-11-07 00:39:20,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:20,858 INFO L462 AbstractCegarLoop]: Abstraction has 585 states and 922 transitions. [2019-11-07 00:39:20,858 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:39:20,858 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 922 transitions. [2019-11-07 00:39:20,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-11-07 00:39:20,861 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:20,862 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:39:20,862 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:20,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:20,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1670566169, now seen corresponding path program 1 times [2019-11-07 00:39:20,863 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:20,863 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416514851] [2019-11-07 00:39:20,863 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:20,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:21,044 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-07 00:39:21,045 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416514851] [2019-11-07 00:39:21,045 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:21,045 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-07 00:39:21,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086618045] [2019-11-07 00:39:21,046 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 00:39:21,046 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:21,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 00:39:21,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-07 00:39:21,047 INFO L87 Difference]: Start difference. First operand 585 states and 922 transitions. Second operand 6 states. [2019-11-07 00:39:21,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:21,339 INFO L93 Difference]: Finished difference Result 1150 states and 1836 transitions. [2019-11-07 00:39:21,340 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-07 00:39:21,340 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 141 [2019-11-07 00:39:21,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:21,348 INFO L225 Difference]: With dead ends: 1150 [2019-11-07 00:39:21,348 INFO L226 Difference]: Without dead ends: 593 [2019-11-07 00:39:21,353 INFO L630 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 [2019-11-07 00:39:21,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2019-11-07 00:39:21,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 590. [2019-11-07 00:39:21,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 590 states. [2019-11-07 00:39:21,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 923 transitions. [2019-11-07 00:39:21,378 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 923 transitions. Word has length 141 [2019-11-07 00:39:21,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:21,378 INFO L462 AbstractCegarLoop]: Abstraction has 590 states and 923 transitions. [2019-11-07 00:39:21,379 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 00:39:21,379 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 923 transitions. [2019-11-07 00:39:21,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-11-07 00:39:21,383 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:21,383 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:39:21,383 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:21,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:21,384 INFO L82 PathProgramCache]: Analyzing trace with hash 478732421, now seen corresponding path program 1 times [2019-11-07 00:39:21,384 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:21,384 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019222834] [2019-11-07 00:39:21,384 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:21,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:21,527 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-07 00:39:21,528 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019222834] [2019-11-07 00:39:21,528 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:21,528 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-07 00:39:21,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698417225] [2019-11-07 00:39:21,529 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 00:39:21,529 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:21,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 00:39:21,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-07 00:39:21,530 INFO L87 Difference]: Start difference. First operand 590 states and 923 transitions. Second operand 6 states. [2019-11-07 00:39:21,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:21,817 INFO L93 Difference]: Finished difference Result 1113 states and 1751 transitions. [2019-11-07 00:39:21,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 00:39:21,818 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 142 [2019-11-07 00:39:21,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:21,826 INFO L225 Difference]: With dead ends: 1113 [2019-11-07 00:39:21,827 INFO L226 Difference]: Without dead ends: 590 [2019-11-07 00:39:21,830 INFO L630 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 [2019-11-07 00:39:21,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2019-11-07 00:39:21,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 590. [2019-11-07 00:39:21,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 590 states. [2019-11-07 00:39:21,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 919 transitions. [2019-11-07 00:39:21,852 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 919 transitions. Word has length 142 [2019-11-07 00:39:21,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:21,852 INFO L462 AbstractCegarLoop]: Abstraction has 590 states and 919 transitions. [2019-11-07 00:39:21,852 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 00:39:21,852 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 919 transitions. [2019-11-07 00:39:21,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2019-11-07 00:39:21,857 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:21,857 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:39:21,857 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:21,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:21,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1066219550, now seen corresponding path program 1 times [2019-11-07 00:39:21,858 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:21,858 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008058954] [2019-11-07 00:39:21,859 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:21,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:22,004 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-07 00:39:22,005 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008058954] [2019-11-07 00:39:22,005 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:22,006 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-07 00:39:22,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623367660] [2019-11-07 00:39:22,006 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 00:39:22,007 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:22,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 00:39:22,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-07 00:39:22,008 INFO L87 Difference]: Start difference. First operand 590 states and 919 transitions. Second operand 6 states. [2019-11-07 00:39:22,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:22,302 INFO L93 Difference]: Finished difference Result 1113 states and 1747 transitions. [2019-11-07 00:39:22,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 00:39:22,302 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 143 [2019-11-07 00:39:22,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:22,307 INFO L225 Difference]: With dead ends: 1113 [2019-11-07 00:39:22,307 INFO L226 Difference]: Without dead ends: 590 [2019-11-07 00:39:22,315 INFO L630 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 [2019-11-07 00:39:22,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2019-11-07 00:39:22,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 590. [2019-11-07 00:39:22,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 590 states. [2019-11-07 00:39:22,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 915 transitions. [2019-11-07 00:39:22,337 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 915 transitions. Word has length 143 [2019-11-07 00:39:22,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:22,337 INFO L462 AbstractCegarLoop]: Abstraction has 590 states and 915 transitions. [2019-11-07 00:39:22,337 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 00:39:22,337 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 915 transitions. [2019-11-07 00:39:22,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2019-11-07 00:39:22,341 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:22,342 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:39:22,342 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:22,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:22,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1343550622, now seen corresponding path program 1 times [2019-11-07 00:39:22,342 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:22,343 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214347411] [2019-11-07 00:39:22,343 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:22,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:22,475 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-07 00:39:22,475 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214347411] [2019-11-07 00:39:22,476 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:22,476 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-07 00:39:22,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822510373] [2019-11-07 00:39:22,477 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 00:39:22,477 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:22,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 00:39:22,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:39:22,478 INFO L87 Difference]: Start difference. First operand 590 states and 915 transitions. Second operand 7 states. [2019-11-07 00:39:22,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:22,592 INFO L93 Difference]: Finished difference Result 1116 states and 1747 transitions. [2019-11-07 00:39:22,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:39:22,593 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 143 [2019-11-07 00:39:22,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:22,601 INFO L225 Difference]: With dead ends: 1116 [2019-11-07 00:39:22,601 INFO L226 Difference]: Without dead ends: 572 [2019-11-07 00:39:22,606 INFO L630 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 [2019-11-07 00:39:22,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2019-11-07 00:39:22,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 569. [2019-11-07 00:39:22,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 569 states. [2019-11-07 00:39:22,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 878 transitions. [2019-11-07 00:39:22,632 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 878 transitions. Word has length 143 [2019-11-07 00:39:22,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:22,633 INFO L462 AbstractCegarLoop]: Abstraction has 569 states and 878 transitions. [2019-11-07 00:39:22,633 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 00:39:22,633 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 878 transitions. [2019-11-07 00:39:22,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-11-07 00:39:22,637 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:22,638 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:39:22,638 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:22,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:22,638 INFO L82 PathProgramCache]: Analyzing trace with hash 978079018, now seen corresponding path program 1 times [2019-11-07 00:39:22,638 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:22,639 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270647832] [2019-11-07 00:39:22,639 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:22,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:22,815 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-07 00:39:22,816 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270647832] [2019-11-07 00:39:22,816 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:22,816 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-07 00:39:22,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992237168] [2019-11-07 00:39:22,817 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 00:39:22,817 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:22,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 00:39:22,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-07 00:39:22,818 INFO L87 Difference]: Start difference. First operand 569 states and 878 transitions. Second operand 6 states. [2019-11-07 00:39:22,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:22,979 INFO L93 Difference]: Finished difference Result 1092 states and 1706 transitions. [2019-11-07 00:39:22,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 00:39:22,979 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 144 [2019-11-07 00:39:22,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:22,984 INFO L225 Difference]: With dead ends: 1092 [2019-11-07 00:39:22,984 INFO L226 Difference]: Without dead ends: 569 [2019-11-07 00:39:22,988 INFO L630 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 [2019-11-07 00:39:22,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2019-11-07 00:39:23,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 569. [2019-11-07 00:39:23,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 569 states. [2019-11-07 00:39:23,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 877 transitions. [2019-11-07 00:39:23,011 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 877 transitions. Word has length 144 [2019-11-07 00:39:23,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:23,011 INFO L462 AbstractCegarLoop]: Abstraction has 569 states and 877 transitions. [2019-11-07 00:39:23,011 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 00:39:23,011 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 877 transitions. [2019-11-07 00:39:23,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-11-07 00:39:23,017 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:23,017 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:39:23,017 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:23,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:23,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1420317475, now seen corresponding path program 1 times [2019-11-07 00:39:23,018 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:23,018 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379194734] [2019-11-07 00:39:23,018 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:23,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:23,146 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-07 00:39:23,147 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379194734] [2019-11-07 00:39:23,147 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:23,147 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-07 00:39:23,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450482966] [2019-11-07 00:39:23,148 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 00:39:23,148 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:23,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 00:39:23,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-07 00:39:23,149 INFO L87 Difference]: Start difference. First operand 569 states and 877 transitions. Second operand 6 states. [2019-11-07 00:39:23,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:23,278 INFO L93 Difference]: Finished difference Result 1092 states and 1705 transitions. [2019-11-07 00:39:23,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 00:39:23,279 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 145 [2019-11-07 00:39:23,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:23,283 INFO L225 Difference]: With dead ends: 1092 [2019-11-07 00:39:23,283 INFO L226 Difference]: Without dead ends: 569 [2019-11-07 00:39:23,286 INFO L630 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 [2019-11-07 00:39:23,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2019-11-07 00:39:23,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 569. [2019-11-07 00:39:23,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 569 states. [2019-11-07 00:39:23,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 876 transitions. [2019-11-07 00:39:23,305 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 876 transitions. Word has length 145 [2019-11-07 00:39:23,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:23,306 INFO L462 AbstractCegarLoop]: Abstraction has 569 states and 876 transitions. [2019-11-07 00:39:23,306 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 00:39:23,306 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 876 transitions. [2019-11-07 00:39:23,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-11-07 00:39:23,310 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:23,310 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:39:23,311 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:23,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:23,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1124435407, now seen corresponding path program 1 times [2019-11-07 00:39:23,311 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:23,311 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146295674] [2019-11-07 00:39:23,312 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:23,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:23,496 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-07 00:39:23,496 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146295674] [2019-11-07 00:39:23,497 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:23,497 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2019-11-07 00:39:23,497 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414217817] [2019-11-07 00:39:23,498 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-07 00:39:23,498 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:23,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-07 00:39:23,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2019-11-07 00:39:23,499 INFO L87 Difference]: Start difference. First operand 569 states and 876 transitions. Second operand 12 states. [2019-11-07 00:39:23,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:23,799 INFO L93 Difference]: Finished difference Result 1098 states and 1715 transitions. [2019-11-07 00:39:23,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-07 00:39:23,800 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 146 [2019-11-07 00:39:23,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:23,804 INFO L225 Difference]: With dead ends: 1098 [2019-11-07 00:39:23,804 INFO L226 Difference]: Without dead ends: 576 [2019-11-07 00:39:23,808 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-11-07 00:39:23,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2019-11-07 00:39:23,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 574. [2019-11-07 00:39:23,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 574 states. [2019-11-07 00:39:23,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 882 transitions. [2019-11-07 00:39:23,849 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 882 transitions. Word has length 146 [2019-11-07 00:39:23,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:23,849 INFO L462 AbstractCegarLoop]: Abstraction has 574 states and 882 transitions. [2019-11-07 00:39:23,849 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-07 00:39:23,849 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 882 transitions. [2019-11-07 00:39:23,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-11-07 00:39:23,853 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:23,854 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:39:23,854 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:23,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:23,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1505055730, now seen corresponding path program 1 times [2019-11-07 00:39:23,854 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:23,855 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362840979] [2019-11-07 00:39:23,855 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:23,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:24,036 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-07 00:39:24,036 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362840979] [2019-11-07 00:39:24,036 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724399411] [2019-11-07 00:39:24,036 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:24,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:24,563 INFO L256 TraceCheckSpWp]: Trace formula consists of 2599 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 00:39:24,587 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:39:24,768 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-11-07 00:39:24,769 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:39:25,177 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-11-07 00:39:25,178 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:39:25,178 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10, 6] total 17 [2019-11-07 00:39:25,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829840437] [2019-11-07 00:39:25,179 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 00:39:25,179 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:25,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 00:39:25,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2019-11-07 00:39:25,180 INFO L87 Difference]: Start difference. First operand 574 states and 882 transitions. Second operand 5 states. [2019-11-07 00:39:26,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:26,058 INFO L93 Difference]: Finished difference Result 1103 states and 1748 transitions. [2019-11-07 00:39:26,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 00:39:26,059 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 147 [2019-11-07 00:39:26,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:26,064 INFO L225 Difference]: With dead ends: 1103 [2019-11-07 00:39:26,064 INFO L226 Difference]: Without dead ends: 582 [2019-11-07 00:39:26,075 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 294 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2019-11-07 00:39:26,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2019-11-07 00:39:26,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 582. [2019-11-07 00:39:26,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 582 states. [2019-11-07 00:39:26,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 895 transitions. [2019-11-07 00:39:26,111 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 895 transitions. Word has length 147 [2019-11-07 00:39:26,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:26,112 INFO L462 AbstractCegarLoop]: Abstraction has 582 states and 895 transitions. [2019-11-07 00:39:26,112 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 00:39:26,112 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 895 transitions. [2019-11-07 00:39:26,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-11-07 00:39:26,116 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:26,117 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:39:26,324 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:26,325 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:26,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:26,325 INFO L82 PathProgramCache]: Analyzing trace with hash -2143848474, now seen corresponding path program 1 times [2019-11-07 00:39:26,325 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:26,326 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001385909] [2019-11-07 00:39:26,326 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:26,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:26,530 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-07 00:39:26,530 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001385909] [2019-11-07 00:39:26,530 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983102106] [2019-11-07 00:39:26,530 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:27,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:27,082 INFO L256 TraceCheckSpWp]: Trace formula consists of 2602 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 00:39:27,093 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:39:27,168 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-07 00:39:27,168 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:39:27,485 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-07 00:39:27,486 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:39:27,486 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6] total 13 [2019-11-07 00:39:27,486 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954886067] [2019-11-07 00:39:27,487 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 00:39:27,487 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:27,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 00:39:27,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2019-11-07 00:39:27,488 INFO L87 Difference]: Start difference. First operand 582 states and 895 transitions. Second operand 5 states. [2019-11-07 00:39:28,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:28,400 INFO L93 Difference]: Finished difference Result 1119 states and 1771 transitions. [2019-11-07 00:39:28,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 00:39:28,401 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 150 [2019-11-07 00:39:28,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:28,406 INFO L225 Difference]: With dead ends: 1119 [2019-11-07 00:39:28,407 INFO L226 Difference]: Without dead ends: 590 [2019-11-07 00:39:28,410 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 290 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2019-11-07 00:39:28,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2019-11-07 00:39:28,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 590. [2019-11-07 00:39:28,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 590 states. [2019-11-07 00:39:28,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 908 transitions. [2019-11-07 00:39:28,432 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 908 transitions. Word has length 150 [2019-11-07 00:39:28,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:28,432 INFO L462 AbstractCegarLoop]: Abstraction has 590 states and 908 transitions. [2019-11-07 00:39:28,432 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 00:39:28,432 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 908 transitions. [2019-11-07 00:39:28,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-11-07 00:39:28,436 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:28,437 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:39:28,644 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:28,644 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:28,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:28,645 INFO L82 PathProgramCache]: Analyzing trace with hash -2124764298, now seen corresponding path program 1 times [2019-11-07 00:39:28,645 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:28,645 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813936520] [2019-11-07 00:39:28,645 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:28,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:28,820 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-07 00:39:28,820 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813936520] [2019-11-07 00:39:28,820 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984776492] [2019-11-07 00:39:28,821 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:29,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:29,355 INFO L256 TraceCheckSpWp]: Trace formula consists of 2605 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 00:39:29,362 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:39:29,451 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-07 00:39:29,451 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:39:29,725 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-07 00:39:29,726 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:39:29,726 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10, 6] total 17 [2019-11-07 00:39:29,726 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102753446] [2019-11-07 00:39:29,727 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 00:39:29,727 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:29,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 00:39:29,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2019-11-07 00:39:29,728 INFO L87 Difference]: Start difference. First operand 590 states and 908 transitions. Second operand 5 states. [2019-11-07 00:39:30,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:30,590 INFO L93 Difference]: Finished difference Result 1135 states and 1794 transitions. [2019-11-07 00:39:30,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 00:39:30,591 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 153 [2019-11-07 00:39:30,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:30,596 INFO L225 Difference]: With dead ends: 1135 [2019-11-07 00:39:30,596 INFO L226 Difference]: Without dead ends: 598 [2019-11-07 00:39:30,599 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 306 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2019-11-07 00:39:30,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2019-11-07 00:39:30,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 598. [2019-11-07 00:39:30,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 598 states. [2019-11-07 00:39:30,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 921 transitions. [2019-11-07 00:39:30,621 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 921 transitions. Word has length 153 [2019-11-07 00:39:30,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:30,622 INFO L462 AbstractCegarLoop]: Abstraction has 598 states and 921 transitions. [2019-11-07 00:39:30,622 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 00:39:30,622 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 921 transitions. [2019-11-07 00:39:30,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-11-07 00:39:30,626 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:30,626 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:39:30,840 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:30,840 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:30,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:30,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1878745502, now seen corresponding path program 1 times [2019-11-07 00:39:30,841 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:30,841 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523691042] [2019-11-07 00:39:30,841 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:30,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:31,022 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-11-07 00:39:31,023 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523691042] [2019-11-07 00:39:31,023 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088088424] [2019-11-07 00:39:31,023 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:31,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:31,585 INFO L256 TraceCheckSpWp]: Trace formula consists of 2608 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 00:39:31,592 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:39:31,690 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-11-07 00:39:31,690 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:39:31,981 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-11-07 00:39:31,981 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:39:31,981 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10, 6] total 16 [2019-11-07 00:39:31,981 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583938970] [2019-11-07 00:39:31,982 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 00:39:31,982 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:31,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 00:39:31,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2019-11-07 00:39:31,983 INFO L87 Difference]: Start difference. First operand 598 states and 921 transitions. Second operand 5 states. [2019-11-07 00:39:32,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:32,879 INFO L93 Difference]: Finished difference Result 1151 states and 1817 transitions. [2019-11-07 00:39:32,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 00:39:32,879 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 156 [2019-11-07 00:39:32,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:32,884 INFO L225 Difference]: With dead ends: 1151 [2019-11-07 00:39:32,884 INFO L226 Difference]: Without dead ends: 606 [2019-11-07 00:39:32,888 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 312 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2019-11-07 00:39:32,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2019-11-07 00:39:32,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 606. [2019-11-07 00:39:32,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 606 states. [2019-11-07 00:39:32,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 934 transitions. [2019-11-07 00:39:32,908 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 934 transitions. Word has length 156 [2019-11-07 00:39:32,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:32,908 INFO L462 AbstractCegarLoop]: Abstraction has 606 states and 934 transitions. [2019-11-07 00:39:32,909 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 00:39:32,909 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 934 transitions. [2019-11-07 00:39:32,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-11-07 00:39:32,912 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:32,913 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:39:33,119 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:33,119 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:33,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:33,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1877071098, now seen corresponding path program 1 times [2019-11-07 00:39:33,120 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:33,120 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449937273] [2019-11-07 00:39:33,120 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:33,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:33,281 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-11-07 00:39:33,282 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449937273] [2019-11-07 00:39:33,282 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742999645] [2019-11-07 00:39:33,282 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:33,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:33,832 INFO L256 TraceCheckSpWp]: Trace formula consists of 2611 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-07 00:39:33,838 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:39:33,905 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:39:33,905 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:39:34,050 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-11-07 00:39:34,051 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:39:34,051 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [10] total 14 [2019-11-07 00:39:34,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488248720] [2019-11-07 00:39:34,053 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 00:39:34,053 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:34,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 00:39:34,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2019-11-07 00:39:34,054 INFO L87 Difference]: Start difference. First operand 606 states and 934 transitions. Second operand 6 states. [2019-11-07 00:39:34,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:34,788 INFO L93 Difference]: Finished difference Result 1718 states and 2734 transitions. [2019-11-07 00:39:34,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:39:34,789 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 159 [2019-11-07 00:39:34,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:34,802 INFO L225 Difference]: With dead ends: 1718 [2019-11-07 00:39:34,802 INFO L226 Difference]: Without dead ends: 1165 [2019-11-07 00:39:34,805 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2019-11-07 00:39:34,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2019-11-07 00:39:34,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 1156. [2019-11-07 00:39:34,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1156 states. [2019-11-07 00:39:34,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1156 states to 1156 states and 1821 transitions. [2019-11-07 00:39:34,854 INFO L78 Accepts]: Start accepts. Automaton has 1156 states and 1821 transitions. Word has length 159 [2019-11-07 00:39:34,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:34,855 INFO L462 AbstractCegarLoop]: Abstraction has 1156 states and 1821 transitions. [2019-11-07 00:39:34,855 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 00:39:34,855 INFO L276 IsEmpty]: Start isEmpty. Operand 1156 states and 1821 transitions. [2019-11-07 00:39:34,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2019-11-07 00:39:34,859 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:34,859 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:39:35,066 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:35,067 INFO L410 AbstractCegarLoop]: === Iteration 20 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:35,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:35,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1145204813, now seen corresponding path program 1 times [2019-11-07 00:39:35,067 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:35,067 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852028896] [2019-11-07 00:39:35,067 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:35,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:35,236 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-11-07 00:39:35,237 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852028896] [2019-11-07 00:39:35,237 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770515381] [2019-11-07 00:39:35,237 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:35,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:35,813 INFO L256 TraceCheckSpWp]: Trace formula consists of 2628 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-07 00:39:35,819 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:39:35,849 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:39:35,849 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:39:35,953 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-11-07 00:39:35,953 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:39:35,954 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [10] total 11 [2019-11-07 00:39:35,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156947150] [2019-11-07 00:39:35,955 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 00:39:35,955 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:35,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 00:39:35,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2019-11-07 00:39:35,956 INFO L87 Difference]: Start difference. First operand 1156 states and 1821 transitions. Second operand 3 states. [2019-11-07 00:39:36,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:36,074 INFO L93 Difference]: Finished difference Result 2803 states and 4493 transitions. [2019-11-07 00:39:36,075 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 00:39:36,075 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 164 [2019-11-07 00:39:36,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:36,086 INFO L225 Difference]: With dead ends: 2803 [2019-11-07 00:39:36,086 INFO L226 Difference]: Without dead ends: 1701 [2019-11-07 00:39:36,091 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 337 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2019-11-07 00:39:36,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1701 states. [2019-11-07 00:39:36,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1701 to 1156. [2019-11-07 00:39:36,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1156 states. [2019-11-07 00:39:36,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1156 states to 1156 states and 1820 transitions. [2019-11-07 00:39:36,180 INFO L78 Accepts]: Start accepts. Automaton has 1156 states and 1820 transitions. Word has length 164 [2019-11-07 00:39:36,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:36,182 INFO L462 AbstractCegarLoop]: Abstraction has 1156 states and 1820 transitions. [2019-11-07 00:39:36,182 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 00:39:36,182 INFO L276 IsEmpty]: Start isEmpty. Operand 1156 states and 1820 transitions. [2019-11-07 00:39:36,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2019-11-07 00:39:36,188 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:36,189 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:39:36,399 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:36,399 INFO L410 AbstractCegarLoop]: === Iteration 21 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:36,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:36,400 INFO L82 PathProgramCache]: Analyzing trace with hash -721558091, now seen corresponding path program 1 times [2019-11-07 00:39:36,400 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:36,401 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969543084] [2019-11-07 00:39:36,401 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:36,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:36,625 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-11-07 00:39:36,626 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969543084] [2019-11-07 00:39:36,626 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259117796] [2019-11-07 00:39:36,626 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:37,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:37,131 INFO L256 TraceCheckSpWp]: Trace formula consists of 2627 conjuncts, 49 conjunts are in the unsatisfiable core [2019-11-07 00:39:37,135 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:39:37,232 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-07 00:39:37,232 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:39:37,679 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-11-07 00:39:37,680 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:39:37,681 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 10] total 21 [2019-11-07 00:39:37,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355218906] [2019-11-07 00:39:37,681 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-07 00:39:37,681 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:37,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-07 00:39:37,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2019-11-07 00:39:37,682 INFO L87 Difference]: Start difference. First operand 1156 states and 1820 transitions. Second operand 9 states. [2019-11-07 00:39:43,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:43,550 INFO L93 Difference]: Finished difference Result 3531 states and 5673 transitions. [2019-11-07 00:39:43,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-07 00:39:43,550 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 164 [2019-11-07 00:39:43,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:43,567 INFO L225 Difference]: With dead ends: 3531 [2019-11-07 00:39:43,567 INFO L226 Difference]: Without dead ends: 2428 [2019-11-07 00:39:43,573 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2019-11-07 00:39:43,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2428 states. [2019-11-07 00:39:43,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2428 to 2397. [2019-11-07 00:39:43,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2397 states. [2019-11-07 00:39:43,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2397 states to 2397 states and 3835 transitions. [2019-11-07 00:39:43,672 INFO L78 Accepts]: Start accepts. Automaton has 2397 states and 3835 transitions. Word has length 164 [2019-11-07 00:39:43,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:43,672 INFO L462 AbstractCegarLoop]: Abstraction has 2397 states and 3835 transitions. [2019-11-07 00:39:43,672 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-07 00:39:43,672 INFO L276 IsEmpty]: Start isEmpty. Operand 2397 states and 3835 transitions. [2019-11-07 00:39:43,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2019-11-07 00:39:43,679 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:43,680 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:39:43,886 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:43,887 INFO L410 AbstractCegarLoop]: === Iteration 22 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:43,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:43,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1012228542, now seen corresponding path program 1 times [2019-11-07 00:39:43,888 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:43,888 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693680178] [2019-11-07 00:39:43,888 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:43,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:44,027 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-11-07 00:39:44,028 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693680178] [2019-11-07 00:39:44,028 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:44,028 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2019-11-07 00:39:44,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090160930] [2019-11-07 00:39:44,029 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-07 00:39:44,029 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:44,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-07 00:39:44,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2019-11-07 00:39:44,030 INFO L87 Difference]: Start difference. First operand 2397 states and 3835 transitions. Second operand 9 states. [2019-11-07 00:39:44,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:44,246 INFO L93 Difference]: Finished difference Result 4666 states and 7506 transitions. [2019-11-07 00:39:44,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-07 00:39:44,247 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 167 [2019-11-07 00:39:44,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:44,263 INFO L225 Difference]: With dead ends: 4666 [2019-11-07 00:39:44,263 INFO L226 Difference]: Without dead ends: 2316 [2019-11-07 00:39:44,275 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2019-11-07 00:39:44,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2316 states. [2019-11-07 00:39:44,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2316 to 2312. [2019-11-07 00:39:44,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2312 states. [2019-11-07 00:39:44,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2312 states to 2312 states and 3708 transitions. [2019-11-07 00:39:44,399 INFO L78 Accepts]: Start accepts. Automaton has 2312 states and 3708 transitions. Word has length 167 [2019-11-07 00:39:44,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:44,400 INFO L462 AbstractCegarLoop]: Abstraction has 2312 states and 3708 transitions. [2019-11-07 00:39:44,400 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-07 00:39:44,400 INFO L276 IsEmpty]: Start isEmpty. Operand 2312 states and 3708 transitions. [2019-11-07 00:39:44,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2019-11-07 00:39:44,405 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:44,406 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1, 1, 1] [2019-11-07 00:39:44,406 INFO L410 AbstractCegarLoop]: === Iteration 23 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:44,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:44,407 INFO L82 PathProgramCache]: Analyzing trace with hash -358886389, now seen corresponding path program 1 times [2019-11-07 00:39:44,407 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:44,407 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896446125] [2019-11-07 00:39:44,408 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:44,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:44,596 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-11-07 00:39:44,596 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896446125] [2019-11-07 00:39:44,597 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027030846] [2019-11-07 00:39:44,597 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:45,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:45,163 INFO L256 TraceCheckSpWp]: Trace formula consists of 2646 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-07 00:39:45,169 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:39:45,246 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-07 00:39:45,246 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:39:45,462 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2019-11-07 00:39:45,463 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:39:45,463 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [8] total 13 [2019-11-07 00:39:45,463 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753377917] [2019-11-07 00:39:45,464 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 00:39:45,464 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:45,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 00:39:45,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2019-11-07 00:39:45,464 INFO L87 Difference]: Start difference. First operand 2312 states and 3708 transitions. Second operand 7 states. [2019-11-07 00:39:45,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:45,566 INFO L93 Difference]: Finished difference Result 4747 states and 7691 transitions. [2019-11-07 00:39:45,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:39:45,567 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 170 [2019-11-07 00:39:45,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:45,584 INFO L225 Difference]: With dead ends: 4747 [2019-11-07 00:39:45,584 INFO L226 Difference]: Without dead ends: 2488 [2019-11-07 00:39:45,595 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 341 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2019-11-07 00:39:45,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2488 states. [2019-11-07 00:39:45,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2488 to 2480. [2019-11-07 00:39:45,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2480 states. [2019-11-07 00:39:45,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2480 states to 2480 states and 3997 transitions. [2019-11-07 00:39:45,705 INFO L78 Accepts]: Start accepts. Automaton has 2480 states and 3997 transitions. Word has length 170 [2019-11-07 00:39:45,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:45,705 INFO L462 AbstractCegarLoop]: Abstraction has 2480 states and 3997 transitions. [2019-11-07 00:39:45,705 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 00:39:45,706 INFO L276 IsEmpty]: Start isEmpty. Operand 2480 states and 3997 transitions. [2019-11-07 00:39:45,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2019-11-07 00:39:45,709 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:45,710 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:39:45,916 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:45,916 INFO L410 AbstractCegarLoop]: === Iteration 24 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:45,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:45,917 INFO L82 PathProgramCache]: Analyzing trace with hash -575012303, now seen corresponding path program 1 times [2019-11-07 00:39:45,918 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:45,918 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026212054] [2019-11-07 00:39:45,918 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:46,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:46,242 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2019-11-07 00:39:46,243 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026212054] [2019-11-07 00:39:46,243 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028847499] [2019-11-07 00:39:46,243 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:46,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:46,766 INFO L256 TraceCheckSpWp]: Trace formula consists of 2668 conjuncts, 49 conjunts are in the unsatisfiable core [2019-11-07 00:39:46,778 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:39:46,871 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-07 00:39:46,871 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:39:47,234 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2019-11-07 00:39:47,235 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:39:47,235 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 10] total 21 [2019-11-07 00:39:47,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972514459] [2019-11-07 00:39:47,236 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-07 00:39:47,236 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:47,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-07 00:39:47,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2019-11-07 00:39:47,237 INFO L87 Difference]: Start difference. First operand 2480 states and 3997 transitions. Second operand 9 states.