/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_product27.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 00:39:22,367 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 00:39:22,370 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 00:39:22,387 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 00:39:22,388 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 00:39:22,390 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 00:39:22,391 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 00:39:22,400 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 00:39:22,403 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 00:39:22,404 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 00:39:22,405 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 00:39:22,407 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 00:39:22,407 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 00:39:22,408 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 00:39:22,409 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 00:39:22,410 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 00:39:22,413 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 00:39:22,414 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 00:39:22,416 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 00:39:22,417 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 00:39:22,419 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 00:39:22,420 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 00:39:22,421 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 00:39:22,421 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 00:39:22,424 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-07 00:39:22,424 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-07 00:39:22,424 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-07 00:39:22,425 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-07 00:39:22,425 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-07 00:39:22,426 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-07 00:39:22,426 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-07 00:39:22,427 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-07 00:39:22,428 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-07 00:39:22,429 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-07 00:39:22,430 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-07 00:39:22,430 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-07 00:39:22,431 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-07 00:39:22,431 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-07 00:39:22,431 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 00:39:22,432 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 00:39:22,433 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 00:39:22,433 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 00:39:22,447 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 00:39:22,447 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 00:39:22,448 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 00:39:22,449 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 00:39:22,449 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 00:39:22,449 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 00:39:22,449 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 00:39:22,449 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 00:39:22,450 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 00:39:22,450 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 00:39:22,450 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 00:39:22,450 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 00:39:22,450 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 00:39:22,451 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 00:39:22,451 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 00:39:22,451 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 00:39:22,451 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 00:39:22,452 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 00:39:22,452 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 00:39:22,452 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 00:39:22,452 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 00:39:22,452 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 00:39:22,453 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 00:39:22,453 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 00:39:22,453 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 00:39:22,453 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 00:39:22,453 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 00:39:22,454 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 00:39:22,454 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 00:39:22,747 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 00:39:22,771 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 00:39:22,774 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 00:39:22,776 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 00:39:22,777 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 00:39:22,778 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec14_product27.cil.c [2019-11-07 00:39:22,854 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50309851c/0d2cbabbf18045118a8a34f370c432a2/FLAG0c2bb376c [2019-11-07 00:39:23,484 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 00:39:23,485 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec14_product27.cil.c [2019-11-07 00:39:23,507 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50309851c/0d2cbabbf18045118a8a34f370c432a2/FLAG0c2bb376c [2019-11-07 00:39:23,704 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50309851c/0d2cbabbf18045118a8a34f370c432a2 [2019-11-07 00:39:23,716 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 00:39:23,723 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 00:39:23,734 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 00:39:23,734 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 00:39:23,741 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 00:39:23,743 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:39:23" (1/1) ... [2019-11-07 00:39:23,747 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1db7d270 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:23, skipping insertion in model container [2019-11-07 00:39:23,747 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:39:23" (1/1) ... [2019-11-07 00:39:23,761 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 00:39:23,898 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 00:39:24,593 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 00:39:24,608 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 00:39:24,753 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 00:39:24,832 INFO L192 MainTranslator]: Completed translation [2019-11-07 00:39:24,832 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:24 WrapperNode [2019-11-07 00:39:24,833 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 00:39:24,833 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 00:39:24,834 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 00:39:24,834 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 00:39:24,846 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:24" (1/1) ... [2019-11-07 00:39:24,846 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:24" (1/1) ... [2019-11-07 00:39:24,880 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:24" (1/1) ... [2019-11-07 00:39:24,880 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:24" (1/1) ... [2019-11-07 00:39:24,938 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:24" (1/1) ... [2019-11-07 00:39:24,970 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:24" (1/1) ... [2019-11-07 00:39:24,981 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:24" (1/1) ... [2019-11-07 00:39:24,998 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 00:39:24,999 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 00:39:24,999 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 00:39:24,999 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 00:39:25,000 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:24" (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 00:39:25,083 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 00:39:25,084 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 00:39:25,084 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-11-07 00:39:25,084 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-11-07 00:39:25,084 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-11-07 00:39:25,085 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-11-07 00:39:25,085 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-11-07 00:39:25,085 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-11-07 00:39:25,085 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-11-07 00:39:25,086 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-11-07 00:39:25,086 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__weight [2019-11-07 00:39:25,086 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-11-07 00:39:25,086 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-11-07 00:39:25,087 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-11-07 00:39:25,087 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-11-07 00:39:25,087 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-11-07 00:39:25,087 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-11-07 00:39:25,088 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-11-07 00:39:25,088 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-11-07 00:39:25,088 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-11-07 00:39:25,088 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-11-07 00:39:25,089 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2019-11-07 00:39:25,089 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-11-07 00:39:25,089 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-11-07 00:39:25,089 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-11-07 00:39:25,089 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-11-07 00:39:25,090 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-11-07 00:39:25,090 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-11-07 00:39:25,090 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-11-07 00:39:25,090 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-11-07 00:39:25,090 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-11-07 00:39:25,091 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-11-07 00:39:25,091 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2019-11-07 00:39:25,091 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloor [2019-11-07 00:39:25,091 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-11-07 00:39:25,091 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-11-07 00:39:25,092 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-11-07 00:39:25,092 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-11-07 00:39:25,092 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-11-07 00:39:25,092 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-11-07 00:39:25,092 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-11-07 00:39:25,092 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-11-07 00:39:25,093 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-11-07 00:39:25,093 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-11-07 00:39:25,093 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-11-07 00:39:25,093 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-11-07 00:39:25,093 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-11-07 00:39:25,094 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-11-07 00:39:25,094 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-11-07 00:39:25,094 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-11-07 00:39:25,094 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 00:39:25,094 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-11-07 00:39:25,094 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-11-07 00:39:25,095 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-11-07 00:39:25,095 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-11-07 00:39:25,095 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-11-07 00:39:25,095 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-11-07 00:39:25,095 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-11-07 00:39:25,096 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-11-07 00:39:25,096 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-11-07 00:39:25,096 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-11-07 00:39:25,096 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-11-07 00:39:25,097 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-11-07 00:39:25,097 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-11-07 00:39:25,097 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification14_spec__1 [2019-11-07 00:39:25,097 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-11-07 00:39:25,097 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-11-07 00:39:25,098 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-11-07 00:39:25,098 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-11-07 00:39:25,098 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-11-07 00:39:25,098 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-11-07 00:39:25,099 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-11-07 00:39:25,099 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-11-07 00:39:25,099 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-11-07 00:39:25,099 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-11-07 00:39:25,100 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-11-07 00:39:25,100 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 00:39:25,100 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 00:39:25,100 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-11-07 00:39:25,101 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-11-07 00:39:25,101 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-11-07 00:39:25,101 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-11-07 00:39:25,101 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-11-07 00:39:25,101 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-11-07 00:39:25,102 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-11-07 00:39:25,102 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-11-07 00:39:25,102 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-11-07 00:39:25,102 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-11-07 00:39:25,102 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-11-07 00:39:25,103 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-11-07 00:39:25,103 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-11-07 00:39:25,103 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-11-07 00:39:25,103 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-11-07 00:39:25,103 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-11-07 00:39:25,104 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-11-07 00:39:25,104 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-11-07 00:39:25,104 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-11-07 00:39:25,104 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-11-07 00:39:25,105 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-11-07 00:39:25,105 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-11-07 00:39:25,105 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2019-11-07 00:39:25,105 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloor [2019-11-07 00:39:25,106 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-11-07 00:39:25,106 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-11-07 00:39:25,106 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__weight [2019-11-07 00:39:25,106 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-11-07 00:39:25,107 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-11-07 00:39:25,107 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-11-07 00:39:25,107 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-11-07 00:39:25,107 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-11-07 00:39:25,108 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2019-11-07 00:39:25,108 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-11-07 00:39:25,108 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-11-07 00:39:25,108 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-11-07 00:39:25,109 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-11-07 00:39:25,109 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-11-07 00:39:25,109 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-11-07 00:39:25,109 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification14_spec__1 [2019-11-07 00:39:25,109 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 00:39:25,110 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-11-07 00:39:25,110 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-07 00:39:25,110 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-11-07 00:39:25,110 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-11-07 00:39:25,110 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-11-07 00:39:25,111 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-11-07 00:39:25,111 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-11-07 00:39:25,111 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-11-07 00:39:25,111 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-11-07 00:39:25,111 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-11-07 00:39:25,112 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-11-07 00:39:25,112 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-11-07 00:39:25,112 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-11-07 00:39:25,112 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-11-07 00:39:25,112 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-11-07 00:39:25,112 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-11-07 00:39:25,112 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-11-07 00:39:25,113 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-11-07 00:39:25,113 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-11-07 00:39:25,113 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-11-07 00:39:25,113 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-11-07 00:39:25,113 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-11-07 00:39:25,113 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-11-07 00:39:25,114 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-11-07 00:39:25,114 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 00:39:25,114 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-11-07 00:39:25,114 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-11-07 00:39:25,114 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-11-07 00:39:25,115 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-07 00:39:25,115 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-07 00:39:25,115 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-11-07 00:39:25,115 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-07 00:39:25,115 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-07 00:39:25,116 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 00:39:25,116 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-07 00:39:25,116 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-11-07 00:39:25,117 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 00:39:25,117 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-11-07 00:39:25,117 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-11-07 00:39:25,117 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 00:39:25,117 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-11-07 00:39:25,118 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-11-07 00:39:25,118 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-11-07 00:39:25,118 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-11-07 00:39:25,118 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-11-07 00:39:25,119 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 00:39:25,119 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-07 00:39:25,119 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 00:39:27,659 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 00:39:27,660 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-11-07 00:39:27,661 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:39:27 BoogieIcfgContainer [2019-11-07 00:39:27,662 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 00:39:27,663 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 00:39:27,663 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 00:39:27,667 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 00:39:27,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:39:23" (1/3) ... [2019-11-07 00:39:27,668 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f8d94d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:39:27, skipping insertion in model container [2019-11-07 00:39:27,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:24" (2/3) ... [2019-11-07 00:39:27,669 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f8d94d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:39:27, skipping insertion in model container [2019-11-07 00:39:27,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:39:27" (3/3) ... [2019-11-07 00:39:27,671 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product27.cil.c [2019-11-07 00:39:27,681 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 00:39:27,693 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 00:39:27,705 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 00:39:27,747 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 00:39:27,747 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 00:39:27,747 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 00:39:27,747 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 00:39:27,748 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 00:39:27,748 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 00:39:27,748 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 00:39:27,748 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 00:39:27,794 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states. [2019-11-07 00:39:27,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-11-07 00:39:27,830 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:27,831 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 00:39:27,833 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:27,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:27,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1973380872, now seen corresponding path program 1 times [2019-11-07 00:39:27,847 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:27,847 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727077541] [2019-11-07 00:39:27,847 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:28,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:28,450 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 00:39:28,450 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727077541] [2019-11-07 00:39:28,452 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:28,452 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 00:39:28,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420669486] [2019-11-07 00:39:28,460 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:39:28,462 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:28,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:39:28,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 00:39:28,481 INFO L87 Difference]: Start difference. First operand 751 states. Second operand 4 states. [2019-11-07 00:39:28,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:28,739 INFO L93 Difference]: Finished difference Result 1200 states and 1920 transitions. [2019-11-07 00:39:28,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:39:28,741 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 135 [2019-11-07 00:39:28,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:28,777 INFO L225 Difference]: With dead ends: 1200 [2019-11-07 00:39:28,777 INFO L226 Difference]: Without dead ends: 603 [2019-11-07 00:39:28,790 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 00:39:28,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2019-11-07 00:39:28,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 603. [2019-11-07 00:39:28,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 603 states. [2019-11-07 00:39:28,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 951 transitions. [2019-11-07 00:39:28,893 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 951 transitions. Word has length 135 [2019-11-07 00:39:28,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:28,894 INFO L462 AbstractCegarLoop]: Abstraction has 603 states and 951 transitions. [2019-11-07 00:39:28,894 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:39:28,894 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 951 transitions. [2019-11-07 00:39:28,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-11-07 00:39:28,902 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:28,902 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 00:39:28,902 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:28,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:28,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1520755359, now seen corresponding path program 1 times [2019-11-07 00:39:28,903 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:28,903 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564874954] [2019-11-07 00:39:28,904 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:28,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:29,107 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 00:39:29,108 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564874954] [2019-11-07 00:39:29,108 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:29,108 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 00:39:29,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656309873] [2019-11-07 00:39:29,110 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:39:29,111 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:29,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:39:29,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 00:39:29,111 INFO L87 Difference]: Start difference. First operand 603 states and 951 transitions. Second operand 4 states. [2019-11-07 00:39:29,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:29,191 INFO L93 Difference]: Finished difference Result 1173 states and 1863 transitions. [2019-11-07 00:39:29,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 00:39:29,192 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 136 [2019-11-07 00:39:29,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:29,197 INFO L225 Difference]: With dead ends: 1173 [2019-11-07 00:39:29,197 INFO L226 Difference]: Without dead ends: 603 [2019-11-07 00:39:29,201 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 00:39:29,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2019-11-07 00:39:29,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 603. [2019-11-07 00:39:29,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 603 states. [2019-11-07 00:39:29,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 950 transitions. [2019-11-07 00:39:29,237 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 950 transitions. Word has length 136 [2019-11-07 00:39:29,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:29,238 INFO L462 AbstractCegarLoop]: Abstraction has 603 states and 950 transitions. [2019-11-07 00:39:29,238 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:39:29,238 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 950 transitions. [2019-11-07 00:39:29,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-11-07 00:39:29,244 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:29,244 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 00:39:29,245 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:29,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:29,245 INFO L82 PathProgramCache]: Analyzing trace with hash -25629804, now seen corresponding path program 1 times [2019-11-07 00:39:29,245 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:29,245 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357253550] [2019-11-07 00:39:29,246 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:29,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:29,467 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 00:39:29,468 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357253550] [2019-11-07 00:39:29,468 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:29,468 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 00:39:29,468 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527926683] [2019-11-07 00:39:29,470 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:39:29,470 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:29,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:39:29,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 00:39:29,471 INFO L87 Difference]: Start difference. First operand 603 states and 950 transitions. Second operand 4 states. [2019-11-07 00:39:29,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:29,542 INFO L93 Difference]: Finished difference Result 1173 states and 1862 transitions. [2019-11-07 00:39:29,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 00:39:29,543 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 137 [2019-11-07 00:39:29,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:29,547 INFO L225 Difference]: With dead ends: 1173 [2019-11-07 00:39:29,548 INFO L226 Difference]: Without dead ends: 603 [2019-11-07 00:39:29,551 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 00:39:29,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2019-11-07 00:39:29,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 603. [2019-11-07 00:39:29,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 603 states. [2019-11-07 00:39:29,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 949 transitions. [2019-11-07 00:39:29,578 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 949 transitions. Word has length 137 [2019-11-07 00:39:29,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:29,578 INFO L462 AbstractCegarLoop]: Abstraction has 603 states and 949 transitions. [2019-11-07 00:39:29,578 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:39:29,578 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 949 transitions. [2019-11-07 00:39:29,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-11-07 00:39:29,583 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:29,583 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 00:39:29,583 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:29,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:29,584 INFO L82 PathProgramCache]: Analyzing trace with hash -572741315, now seen corresponding path program 1 times [2019-11-07 00:39:29,584 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:29,584 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122773211] [2019-11-07 00:39:29,585 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:29,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:29,704 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 00:39:29,705 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122773211] [2019-11-07 00:39:29,705 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:29,705 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 00:39:29,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192993217] [2019-11-07 00:39:29,706 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:39:29,706 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:29,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:39:29,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 00:39:29,707 INFO L87 Difference]: Start difference. First operand 603 states and 949 transitions. Second operand 4 states. [2019-11-07 00:39:29,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:29,775 INFO L93 Difference]: Finished difference Result 1173 states and 1861 transitions. [2019-11-07 00:39:29,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 00:39:29,776 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 138 [2019-11-07 00:39:29,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:29,780 INFO L225 Difference]: With dead ends: 1173 [2019-11-07 00:39:29,780 INFO L226 Difference]: Without dead ends: 603 [2019-11-07 00:39:29,783 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 00:39:29,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2019-11-07 00:39:29,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 603. [2019-11-07 00:39:29,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 603 states. [2019-11-07 00:39:29,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 948 transitions. [2019-11-07 00:39:29,806 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 948 transitions. Word has length 138 [2019-11-07 00:39:29,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:29,807 INFO L462 AbstractCegarLoop]: Abstraction has 603 states and 948 transitions. [2019-11-07 00:39:29,807 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:39:29,807 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 948 transitions. [2019-11-07 00:39:29,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2019-11-07 00:39:29,811 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:29,811 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 00:39:29,812 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:29,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:29,812 INFO L82 PathProgramCache]: Analyzing trace with hash -4692432, now seen corresponding path program 1 times [2019-11-07 00:39:29,812 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:29,812 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769582000] [2019-11-07 00:39:29,813 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:29,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:30,001 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 00:39:30,002 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769582000] [2019-11-07 00:39:30,002 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:30,002 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 00:39:30,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155448688] [2019-11-07 00:39:30,003 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:39:30,003 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:30,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:39:30,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 00:39:30,004 INFO L87 Difference]: Start difference. First operand 603 states and 948 transitions. Second operand 4 states. [2019-11-07 00:39:30,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:30,090 INFO L93 Difference]: Finished difference Result 1173 states and 1860 transitions. [2019-11-07 00:39:30,091 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 00:39:30,091 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 139 [2019-11-07 00:39:30,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:30,095 INFO L225 Difference]: With dead ends: 1173 [2019-11-07 00:39:30,096 INFO L226 Difference]: Without dead ends: 603 [2019-11-07 00:39:30,099 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 00:39:30,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2019-11-07 00:39:30,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 603. [2019-11-07 00:39:30,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 603 states. [2019-11-07 00:39:30,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 947 transitions. [2019-11-07 00:39:30,131 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 947 transitions. Word has length 139 [2019-11-07 00:39:30,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:30,132 INFO L462 AbstractCegarLoop]: Abstraction has 603 states and 947 transitions. [2019-11-07 00:39:30,132 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:39:30,132 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 947 transitions. [2019-11-07 00:39:30,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-11-07 00:39:30,139 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:30,140 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 00:39:30,140 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:30,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:30,141 INFO L82 PathProgramCache]: Analyzing trace with hash 773590297, now seen corresponding path program 1 times [2019-11-07 00:39:30,141 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:30,141 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285577330] [2019-11-07 00:39:30,142 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:30,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:30,417 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 00:39:30,418 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285577330] [2019-11-07 00:39:30,419 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:30,419 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2019-11-07 00:39:30,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560819138] [2019-11-07 00:39:30,420 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-07 00:39:30,424 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:30,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-07 00:39:30,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2019-11-07 00:39:30,425 INFO L87 Difference]: Start difference. First operand 603 states and 947 transitions. Second operand 10 states. [2019-11-07 00:39:30,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:30,679 INFO L93 Difference]: Finished difference Result 1178 states and 1867 transitions. [2019-11-07 00:39:30,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-07 00:39:30,681 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 140 [2019-11-07 00:39:30,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:30,696 INFO L225 Difference]: With dead ends: 1178 [2019-11-07 00:39:30,699 INFO L226 Difference]: Without dead ends: 612 [2019-11-07 00:39:30,707 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2019-11-07 00:39:30,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2019-11-07 00:39:30,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 610. [2019-11-07 00:39:30,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 610 states. [2019-11-07 00:39:30,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 957 transitions. [2019-11-07 00:39:30,758 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 957 transitions. Word has length 140 [2019-11-07 00:39:30,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:30,759 INFO L462 AbstractCegarLoop]: Abstraction has 610 states and 957 transitions. [2019-11-07 00:39:30,759 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-07 00:39:30,760 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 957 transitions. [2019-11-07 00:39:30,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-11-07 00:39:30,767 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:30,767 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 00:39:30,767 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:30,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:30,768 INFO L82 PathProgramCache]: Analyzing trace with hash -212992392, now seen corresponding path program 1 times [2019-11-07 00:39:30,768 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:30,769 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60187905] [2019-11-07 00:39:30,769 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:30,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:31,016 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 00:39:31,016 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60187905] [2019-11-07 00:39:31,016 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:31,017 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 00:39:31,017 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427463470] [2019-11-07 00:39:31,017 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:39:31,017 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:31,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:39:31,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 00:39:31,018 INFO L87 Difference]: Start difference. First operand 610 states and 957 transitions. Second operand 4 states. [2019-11-07 00:39:31,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:31,082 INFO L93 Difference]: Finished difference Result 1179 states and 1868 transitions. [2019-11-07 00:39:31,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:39:31,082 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 140 [2019-11-07 00:39:31,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:31,088 INFO L225 Difference]: With dead ends: 1179 [2019-11-07 00:39:31,088 INFO L226 Difference]: Without dead ends: 606 [2019-11-07 00:39:31,094 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 00:39:31,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2019-11-07 00:39:31,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 606. [2019-11-07 00:39:31,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 606 states. [2019-11-07 00:39:31,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 950 transitions. [2019-11-07 00:39:31,118 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 950 transitions. Word has length 140 [2019-11-07 00:39:31,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:31,118 INFO L462 AbstractCegarLoop]: Abstraction has 606 states and 950 transitions. [2019-11-07 00:39:31,118 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:39:31,118 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 950 transitions. [2019-11-07 00:39:31,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-11-07 00:39:31,122 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:31,123 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 00:39:31,123 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:31,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:31,123 INFO L82 PathProgramCache]: Analyzing trace with hash -429509062, now seen corresponding path program 1 times [2019-11-07 00:39:31,124 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:31,124 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386606231] [2019-11-07 00:39:31,125 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:31,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:31,276 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 00:39:31,277 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386606231] [2019-11-07 00:39:31,277 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:31,277 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-07 00:39:31,278 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609319435] [2019-11-07 00:39:31,278 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 00:39:31,278 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:31,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 00:39:31,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-07 00:39:31,280 INFO L87 Difference]: Start difference. First operand 606 states and 950 transitions. Second operand 6 states. [2019-11-07 00:39:31,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:31,631 INFO L93 Difference]: Finished difference Result 1192 states and 1892 transitions. [2019-11-07 00:39:31,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-07 00:39:31,632 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 141 [2019-11-07 00:39:31,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:31,640 INFO L225 Difference]: With dead ends: 1192 [2019-11-07 00:39:31,641 INFO L226 Difference]: Without dead ends: 614 [2019-11-07 00:39:31,645 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 00:39:31,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2019-11-07 00:39:31,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 611. [2019-11-07 00:39:31,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 611 states. [2019-11-07 00:39:31,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 611 states to 611 states and 951 transitions. [2019-11-07 00:39:31,671 INFO L78 Accepts]: Start accepts. Automaton has 611 states and 951 transitions. Word has length 141 [2019-11-07 00:39:31,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:31,672 INFO L462 AbstractCegarLoop]: Abstraction has 611 states and 951 transitions. [2019-11-07 00:39:31,672 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 00:39:31,673 INFO L276 IsEmpty]: Start isEmpty. Operand 611 states and 951 transitions. [2019-11-07 00:39:31,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-11-07 00:39:31,677 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:31,677 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 00:39:31,677 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:31,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:31,677 INFO L82 PathProgramCache]: Analyzing trace with hash 16704540, now seen corresponding path program 1 times [2019-11-07 00:39:31,678 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:31,678 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363194375] [2019-11-07 00:39:31,678 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:31,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:31,845 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 00:39:31,845 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363194375] [2019-11-07 00:39:31,847 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:31,847 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-07 00:39:31,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625212666] [2019-11-07 00:39:31,848 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 00:39:31,848 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:31,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 00:39:31,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-07 00:39:31,848 INFO L87 Difference]: Start difference. First operand 611 states and 951 transitions. Second operand 6 states. [2019-11-07 00:39:32,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:32,107 INFO L93 Difference]: Finished difference Result 1155 states and 1807 transitions. [2019-11-07 00:39:32,107 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 00:39:32,108 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 142 [2019-11-07 00:39:32,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:32,114 INFO L225 Difference]: With dead ends: 1155 [2019-11-07 00:39:32,118 INFO L226 Difference]: Without dead ends: 611 [2019-11-07 00:39:32,123 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 00:39:32,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2019-11-07 00:39:32,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 611. [2019-11-07 00:39:32,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 611 states. [2019-11-07 00:39:32,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 611 states to 611 states and 947 transitions. [2019-11-07 00:39:32,194 INFO L78 Accepts]: Start accepts. Automaton has 611 states and 947 transitions. Word has length 142 [2019-11-07 00:39:32,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:32,194 INFO L462 AbstractCegarLoop]: Abstraction has 611 states and 947 transitions. [2019-11-07 00:39:32,195 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 00:39:32,195 INFO L276 IsEmpty]: Start isEmpty. Operand 611 states and 947 transitions. [2019-11-07 00:39:32,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2019-11-07 00:39:32,200 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:32,200 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 00:39:32,201 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:32,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:32,201 INFO L82 PathProgramCache]: Analyzing trace with hash -155948033, now seen corresponding path program 1 times [2019-11-07 00:39:32,201 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:32,201 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877168393] [2019-11-07 00:39:32,202 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:32,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:32,353 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 00:39:32,354 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877168393] [2019-11-07 00:39:32,354 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:32,355 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-07 00:39:32,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287656279] [2019-11-07 00:39:32,356 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 00:39:32,356 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:32,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 00:39:32,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-07 00:39:32,357 INFO L87 Difference]: Start difference. First operand 611 states and 947 transitions. Second operand 6 states. [2019-11-07 00:39:32,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:32,609 INFO L93 Difference]: Finished difference Result 1155 states and 1803 transitions. [2019-11-07 00:39:32,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 00:39:32,610 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 143 [2019-11-07 00:39:32,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:32,616 INFO L225 Difference]: With dead ends: 1155 [2019-11-07 00:39:32,616 INFO L226 Difference]: Without dead ends: 611 [2019-11-07 00:39:32,624 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 00:39:32,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2019-11-07 00:39:32,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 611. [2019-11-07 00:39:32,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 611 states. [2019-11-07 00:39:32,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 611 states to 611 states and 943 transitions. [2019-11-07 00:39:32,647 INFO L78 Accepts]: Start accepts. Automaton has 611 states and 943 transitions. Word has length 143 [2019-11-07 00:39:32,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:32,647 INFO L462 AbstractCegarLoop]: Abstraction has 611 states and 943 transitions. [2019-11-07 00:39:32,648 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 00:39:32,648 INFO L276 IsEmpty]: Start isEmpty. Operand 611 states and 943 transitions. [2019-11-07 00:39:32,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2019-11-07 00:39:32,653 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:32,654 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 00:39:32,654 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:32,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:32,654 INFO L82 PathProgramCache]: Analyzing trace with hash 121383039, now seen corresponding path program 1 times [2019-11-07 00:39:32,655 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:32,655 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805149459] [2019-11-07 00:39:32,655 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:32,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:32,795 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 00:39:32,795 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805149459] [2019-11-07 00:39:32,795 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:32,796 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-07 00:39:32,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64679153] [2019-11-07 00:39:32,797 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 00:39:32,797 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:32,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 00:39:32,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:39:32,798 INFO L87 Difference]: Start difference. First operand 611 states and 943 transitions. Second operand 7 states. [2019-11-07 00:39:32,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:32,908 INFO L93 Difference]: Finished difference Result 1158 states and 1803 transitions. [2019-11-07 00:39:32,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:39:32,909 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 143 [2019-11-07 00:39:32,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:32,915 INFO L225 Difference]: With dead ends: 1158 [2019-11-07 00:39:32,915 INFO L226 Difference]: Without dead ends: 593 [2019-11-07 00:39:32,918 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 00:39:32,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2019-11-07 00:39:32,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 590. [2019-11-07 00:39:32,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 590 states. [2019-11-07 00:39:32,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 906 transitions. [2019-11-07 00:39:32,954 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 906 transitions. Word has length 143 [2019-11-07 00:39:32,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:32,954 INFO L462 AbstractCegarLoop]: Abstraction has 590 states and 906 transitions. [2019-11-07 00:39:32,954 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 00:39:32,954 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 906 transitions. [2019-11-07 00:39:32,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-11-07 00:39:32,960 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:32,960 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 00:39:32,960 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:32,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:32,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1961384449, now seen corresponding path program 1 times [2019-11-07 00:39:32,961 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:32,961 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10300588] [2019-11-07 00:39:32,961 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:33,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:33,118 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 00:39:33,119 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10300588] [2019-11-07 00:39:33,119 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:33,119 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-07 00:39:33,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220519687] [2019-11-07 00:39:33,121 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 00:39:33,121 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:33,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 00:39:33,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-07 00:39:33,122 INFO L87 Difference]: Start difference. First operand 590 states and 906 transitions. Second operand 6 states. [2019-11-07 00:39:33,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:33,252 INFO L93 Difference]: Finished difference Result 1134 states and 1762 transitions. [2019-11-07 00:39:33,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 00:39:33,253 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 144 [2019-11-07 00:39:33,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:33,257 INFO L225 Difference]: With dead ends: 1134 [2019-11-07 00:39:33,257 INFO L226 Difference]: Without dead ends: 590 [2019-11-07 00:39:33,261 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 00:39:33,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2019-11-07 00:39:33,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 590. [2019-11-07 00:39:33,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 590 states. [2019-11-07 00:39:33,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 905 transitions. [2019-11-07 00:39:33,287 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 905 transitions. Word has length 144 [2019-11-07 00:39:33,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:33,288 INFO L462 AbstractCegarLoop]: Abstraction has 590 states and 905 transitions. [2019-11-07 00:39:33,288 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 00:39:33,288 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 905 transitions. [2019-11-07 00:39:33,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-11-07 00:39:33,292 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:33,293 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 00:39:33,293 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:33,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:33,293 INFO L82 PathProgramCache]: Analyzing trace with hash 2053809604, now seen corresponding path program 1 times [2019-11-07 00:39:33,293 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:33,294 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720171413] [2019-11-07 00:39:33,294 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:33,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:33,419 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 00:39:33,420 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720171413] [2019-11-07 00:39:33,420 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:33,420 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-07 00:39:33,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995805470] [2019-11-07 00:39:33,421 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 00:39:33,421 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:33,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 00:39:33,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-07 00:39:33,422 INFO L87 Difference]: Start difference. First operand 590 states and 905 transitions. Second operand 6 states. [2019-11-07 00:39:33,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:33,551 INFO L93 Difference]: Finished difference Result 1134 states and 1761 transitions. [2019-11-07 00:39:33,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 00:39:33,552 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 145 [2019-11-07 00:39:33,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:33,557 INFO L225 Difference]: With dead ends: 1134 [2019-11-07 00:39:33,557 INFO L226 Difference]: Without dead ends: 590 [2019-11-07 00:39:33,561 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 00:39:33,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2019-11-07 00:39:33,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 590. [2019-11-07 00:39:33,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 590 states. [2019-11-07 00:39:33,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 904 transitions. [2019-11-07 00:39:33,586 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 904 transitions. Word has length 145 [2019-11-07 00:39:33,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:33,588 INFO L462 AbstractCegarLoop]: Abstraction has 590 states and 904 transitions. [2019-11-07 00:39:33,588 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 00:39:33,588 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 904 transitions. [2019-11-07 00:39:33,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-11-07 00:39:33,592 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:33,592 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 00:39:33,593 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:33,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:33,593 INFO L82 PathProgramCache]: Analyzing trace with hash -496350234, now seen corresponding path program 1 times [2019-11-07 00:39:33,593 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:33,593 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412010647] [2019-11-07 00:39:33,594 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:33,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:33,781 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 00:39:33,781 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412010647] [2019-11-07 00:39:33,782 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:33,782 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2019-11-07 00:39:33,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394997286] [2019-11-07 00:39:33,783 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-07 00:39:33,783 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:33,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-07 00:39:33,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2019-11-07 00:39:33,784 INFO L87 Difference]: Start difference. First operand 590 states and 904 transitions. Second operand 12 states. [2019-11-07 00:39:34,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:34,063 INFO L93 Difference]: Finished difference Result 1140 states and 1771 transitions. [2019-11-07 00:39:34,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-07 00:39:34,063 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 146 [2019-11-07 00:39:34,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:34,068 INFO L225 Difference]: With dead ends: 1140 [2019-11-07 00:39:34,068 INFO L226 Difference]: Without dead ends: 597 [2019-11-07 00:39:34,073 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 00:39:34,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2019-11-07 00:39:34,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 595. [2019-11-07 00:39:34,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 595 states. [2019-11-07 00:39:34,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 910 transitions. [2019-11-07 00:39:34,101 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 910 transitions. Word has length 146 [2019-11-07 00:39:34,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:34,103 INFO L462 AbstractCegarLoop]: Abstraction has 595 states and 910 transitions. [2019-11-07 00:39:34,103 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-07 00:39:34,103 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 910 transitions. [2019-11-07 00:39:34,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-11-07 00:39:34,107 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:34,108 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 00:39:34,108 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:34,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:34,108 INFO L82 PathProgramCache]: Analyzing trace with hash 94623585, now seen corresponding path program 1 times [2019-11-07 00:39:34,108 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:34,109 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330899587] [2019-11-07 00:39:34,109 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:34,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:34,339 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 00:39:34,339 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330899587] [2019-11-07 00:39:34,339 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487175480] [2019-11-07 00:39:34,340 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 00:39:34,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:34,834 INFO L256 TraceCheckSpWp]: Trace formula consists of 2628 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:39:34,853 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:39:34,912 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-07 00:39:34,913 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:39:35,061 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 00:39:35,061 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:39:35,062 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [10] total 11 [2019-11-07 00:39:35,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952006071] [2019-11-07 00:39:35,063 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 00:39:35,063 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:35,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 00:39:35,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2019-11-07 00:39:35,064 INFO L87 Difference]: Start difference. First operand 595 states and 910 transitions. Second operand 3 states. [2019-11-07 00:39:35,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:35,172 INFO L93 Difference]: Finished difference Result 1674 states and 2637 transitions. [2019-11-07 00:39:35,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 00:39:35,172 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 147 [2019-11-07 00:39:35,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:35,182 INFO L225 Difference]: With dead ends: 1674 [2019-11-07 00:39:35,183 INFO L226 Difference]: Without dead ends: 1132 [2019-11-07 00:39:35,193 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 304 SyntacticMatches, 0 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 00:39:35,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1132 states. [2019-11-07 00:39:35,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1132 to 1124. [2019-11-07 00:39:35,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1124 states. [2019-11-07 00:39:35,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1124 states to 1124 states and 1755 transitions. [2019-11-07 00:39:35,240 INFO L78 Accepts]: Start accepts. Automaton has 1124 states and 1755 transitions. Word has length 147 [2019-11-07 00:39:35,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:35,241 INFO L462 AbstractCegarLoop]: Abstraction has 1124 states and 1755 transitions. [2019-11-07 00:39:35,241 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 00:39:35,241 INFO L276 IsEmpty]: Start isEmpty. Operand 1124 states and 1755 transitions. [2019-11-07 00:39:35,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-11-07 00:39:35,245 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:35,246 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 00:39:35,462 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:35,462 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:35,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:35,463 INFO L82 PathProgramCache]: Analyzing trace with hash -564907937, now seen corresponding path program 1 times [2019-11-07 00:39:35,464 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:35,464 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795611423] [2019-11-07 00:39:35,464 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:35,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:35,679 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 00:39:35,680 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795611423] [2019-11-07 00:39:35,680 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175738282] [2019-11-07 00:39:35,681 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 00:39:36,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:36,214 INFO L256 TraceCheckSpWp]: Trace formula consists of 2631 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 00:39:36,228 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:39:36,326 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 00:39:36,327 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:39:36,647 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 00:39:36,647 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:39:36,647 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10, 6] total 17 [2019-11-07 00:39:36,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974822695] [2019-11-07 00:39:36,648 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 00:39:36,648 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:36,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 00:39:36,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2019-11-07 00:39:36,649 INFO L87 Difference]: Start difference. First operand 1124 states and 1755 transitions. Second operand 5 states. [2019-11-07 00:39:37,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:37,591 INFO L93 Difference]: Finished difference Result 2211 states and 3542 transitions. [2019-11-07 00:39:37,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 00:39:37,591 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 147 [2019-11-07 00:39:37,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:37,600 INFO L225 Difference]: With dead ends: 2211 [2019-11-07 00:39:37,600 INFO L226 Difference]: Without dead ends: 1140 [2019-11-07 00:39:37,606 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 00:39:37,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1140 states. [2019-11-07 00:39:37,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1140 to 1140. [2019-11-07 00:39:37,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1140 states. [2019-11-07 00:39:37,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 1781 transitions. [2019-11-07 00:39:37,650 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 1781 transitions. Word has length 147 [2019-11-07 00:39:37,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:37,650 INFO L462 AbstractCegarLoop]: Abstraction has 1140 states and 1781 transitions. [2019-11-07 00:39:37,650 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 00:39:37,650 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 1781 transitions. [2019-11-07 00:39:37,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-11-07 00:39:37,655 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:37,655 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 00:39:37,861 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:37,862 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:37,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:37,863 INFO L82 PathProgramCache]: Analyzing trace with hash -1245425385, now seen corresponding path program 1 times [2019-11-07 00:39:37,863 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:37,863 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051010047] [2019-11-07 00:39:37,863 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:37,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:38,046 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 00:39:38,046 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051010047] [2019-11-07 00:39:38,046 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432645643] [2019-11-07 00:39:38,047 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 00:39:38,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:38,549 INFO L256 TraceCheckSpWp]: Trace formula consists of 2634 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 00:39:38,555 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:39:38,605 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 00:39:38,605 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:39:38,868 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 00:39:38,868 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:39:38,869 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6] total 13 [2019-11-07 00:39:38,869 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468455202] [2019-11-07 00:39:38,870 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 00:39:38,870 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:38,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 00:39:38,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2019-11-07 00:39:38,871 INFO L87 Difference]: Start difference. First operand 1140 states and 1781 transitions. Second operand 5 states. [2019-11-07 00:39:39,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:39,736 INFO L93 Difference]: Finished difference Result 2243 states and 3588 transitions. [2019-11-07 00:39:39,737 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 00:39:39,737 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 150 [2019-11-07 00:39:39,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:39,746 INFO L225 Difference]: With dead ends: 2243 [2019-11-07 00:39:39,746 INFO L226 Difference]: Without dead ends: 1156 [2019-11-07 00:39:39,753 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 00:39:39,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1156 states. [2019-11-07 00:39:39,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1156 to 1156. [2019-11-07 00:39:39,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1156 states. [2019-11-07 00:39:39,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1156 states to 1156 states and 1807 transitions. [2019-11-07 00:39:39,797 INFO L78 Accepts]: Start accepts. Automaton has 1156 states and 1807 transitions. Word has length 150 [2019-11-07 00:39:39,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:39,797 INFO L462 AbstractCegarLoop]: Abstraction has 1156 states and 1807 transitions. [2019-11-07 00:39:39,798 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 00:39:39,798 INFO L276 IsEmpty]: Start isEmpty. Operand 1156 states and 1807 transitions. [2019-11-07 00:39:39,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-11-07 00:39:39,802 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:39,802 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 00:39:40,008 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:40,008 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:40,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:40,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1929351523, now seen corresponding path program 1 times [2019-11-07 00:39:40,009 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:40,009 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909403400] [2019-11-07 00:39:40,009 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:40,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:40,202 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 00:39:40,203 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909403400] [2019-11-07 00:39:40,203 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042053926] [2019-11-07 00:39:40,203 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 00:39:40,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:40,704 INFO L256 TraceCheckSpWp]: Trace formula consists of 2637 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 00:39:40,710 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:39:40,789 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 00:39:40,789 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:39:41,099 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 00:39:41,099 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:39:41,099 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10, 6] total 17 [2019-11-07 00:39:41,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485108350] [2019-11-07 00:39:41,100 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 00:39:41,100 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:41,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 00:39:41,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2019-11-07 00:39:41,101 INFO L87 Difference]: Start difference. First operand 1156 states and 1807 transitions. Second operand 5 states. [2019-11-07 00:39:42,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:42,047 INFO L93 Difference]: Finished difference Result 2275 states and 3634 transitions. [2019-11-07 00:39:42,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 00:39:42,048 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 153 [2019-11-07 00:39:42,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:42,055 INFO L225 Difference]: With dead ends: 2275 [2019-11-07 00:39:42,055 INFO L226 Difference]: Without dead ends: 1172 [2019-11-07 00:39:42,061 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 00:39:42,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1172 states. [2019-11-07 00:39:42,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1172 to 1172. [2019-11-07 00:39:42,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1172 states. [2019-11-07 00:39:42,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1172 states to 1172 states and 1833 transitions. [2019-11-07 00:39:42,103 INFO L78 Accepts]: Start accepts. Automaton has 1172 states and 1833 transitions. Word has length 153 [2019-11-07 00:39:42,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:42,104 INFO L462 AbstractCegarLoop]: Abstraction has 1172 states and 1833 transitions. [2019-11-07 00:39:42,104 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 00:39:42,104 INFO L276 IsEmpty]: Start isEmpty. Operand 1172 states and 1833 transitions. [2019-11-07 00:39:42,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-11-07 00:39:42,108 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:42,109 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 00:39:42,317 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:42,317 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:42,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:42,317 INFO L82 PathProgramCache]: Analyzing trace with hash -998466541, now seen corresponding path program 1 times [2019-11-07 00:39:42,317 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:42,318 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698868811] [2019-11-07 00:39:42,318 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:42,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:42,486 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 00:39:42,486 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698868811] [2019-11-07 00:39:42,487 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858509891] [2019-11-07 00:39:42,487 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 00:39:42,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:42,981 INFO L256 TraceCheckSpWp]: Trace formula consists of 2640 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 00:39:42,986 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:39:43,057 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 00:39:43,058 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:39:43,317 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 00:39:43,317 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:39:43,318 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10, 6] total 16 [2019-11-07 00:39:43,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720916377] [2019-11-07 00:39:43,319 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 00:39:43,319 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:43,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 00:39:43,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2019-11-07 00:39:43,320 INFO L87 Difference]: Start difference. First operand 1172 states and 1833 transitions. Second operand 5 states. [2019-11-07 00:39:44,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:44,199 INFO L93 Difference]: Finished difference Result 2307 states and 3680 transitions. [2019-11-07 00:39:44,200 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 00:39:44,200 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 156 [2019-11-07 00:39:44,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:44,209 INFO L225 Difference]: With dead ends: 2307 [2019-11-07 00:39:44,210 INFO L226 Difference]: Without dead ends: 1188 [2019-11-07 00:39:44,215 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 312 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2019-11-07 00:39:44,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1188 states. [2019-11-07 00:39:44,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1188 to 1188. [2019-11-07 00:39:44,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1188 states. [2019-11-07 00:39:44,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1188 states to 1188 states and 1859 transitions. [2019-11-07 00:39:44,255 INFO L78 Accepts]: Start accepts. Automaton has 1188 states and 1859 transitions. Word has length 156 [2019-11-07 00:39:44,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:44,255 INFO L462 AbstractCegarLoop]: Abstraction has 1188 states and 1859 transitions. [2019-11-07 00:39:44,255 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 00:39:44,255 INFO L276 IsEmpty]: Start isEmpty. Operand 1188 states and 1859 transitions. [2019-11-07 00:39:44,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-11-07 00:39:44,260 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:44,260 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 00:39:44,474 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:44,474 INFO L410 AbstractCegarLoop]: === Iteration 20 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:44,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:44,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1826937753, now seen corresponding path program 1 times [2019-11-07 00:39:44,475 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:44,476 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099350365] [2019-11-07 00:39:44,476 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:44,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:44,701 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 00:39:44,701 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099350365] [2019-11-07 00:39:44,701 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767610261] [2019-11-07 00:39:44,701 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 00:39:45,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:45,276 INFO L256 TraceCheckSpWp]: Trace formula consists of 2643 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-07 00:39:45,282 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:39:45,359 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 00:39:45,359 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:39:45,487 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 00:39:45,487 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:39:45,488 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [10] total 14 [2019-11-07 00:39:45,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380052226] [2019-11-07 00:39:45,488 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 00:39:45,489 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:45,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 00:39:45,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2019-11-07 00:39:45,489 INFO L87 Difference]: Start difference. First operand 1188 states and 1859 transitions. Second operand 6 states. [2019-11-07 00:39:46,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:46,272 INFO L93 Difference]: Finished difference Result 2340 states and 3712 transitions. [2019-11-07 00:39:46,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:39:46,273 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 159 [2019-11-07 00:39:46,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:46,281 INFO L225 Difference]: With dead ends: 2340 [2019-11-07 00:39:46,281 INFO L226 Difference]: Without dead ends: 1205 [2019-11-07 00:39:46,286 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2019-11-07 00:39:46,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1205 states. [2019-11-07 00:39:46,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1205 to 1198. [2019-11-07 00:39:46,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1198 states. [2019-11-07 00:39:46,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 1876 transitions. [2019-11-07 00:39:46,335 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 1876 transitions. Word has length 159 [2019-11-07 00:39:46,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:46,335 INFO L462 AbstractCegarLoop]: Abstraction has 1198 states and 1876 transitions. [2019-11-07 00:39:46,336 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 00:39:46,336 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 1876 transitions. [2019-11-07 00:39:46,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2019-11-07 00:39:46,340 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:46,340 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 00:39:46,546 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:46,547 INFO L410 AbstractCegarLoop]: === Iteration 21 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:46,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:46,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1896832043, now seen corresponding path program 1 times [2019-11-07 00:39:46,548 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:46,548 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316151998] [2019-11-07 00:39:46,549 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:46,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:46,784 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 00:39:46,785 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316151998] [2019-11-07 00:39:46,785 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920283583] [2019-11-07 00:39:46,785 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 00:39:47,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:47,364 INFO L256 TraceCheckSpWp]: Trace formula consists of 2659 conjuncts, 49 conjunts are in the unsatisfiable core [2019-11-07 00:39:47,370 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:39:47,464 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 00:39:47,465 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:39:47,843 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 00:39:47,844 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:39:47,844 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 10] total 21 [2019-11-07 00:39:47,844 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149596512] [2019-11-07 00:39:47,845 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-07 00:39:47,845 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:47,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-07 00:39:47,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2019-11-07 00:39:47,846 INFO L87 Difference]: Start difference. First operand 1198 states and 1876 transitions. Second operand 9 states. [2019-11-07 00:39:53,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:53,852 INFO L93 Difference]: Finished difference Result 3657 states and 5841 transitions. [2019-11-07 00:39:53,854 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-07 00:39:53,854 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 164 [2019-11-07 00:39:53,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:53,876 INFO L225 Difference]: With dead ends: 3657 [2019-11-07 00:39:53,876 INFO L226 Difference]: Without dead ends: 2512 [2019-11-07 00:39:53,883 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 00:39:53,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2512 states. [2019-11-07 00:39:53,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2512 to 2481. [2019-11-07 00:39:53,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2481 states. [2019-11-07 00:39:53,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2481 states to 2481 states and 3947 transitions. [2019-11-07 00:39:53,992 INFO L78 Accepts]: Start accepts. Automaton has 2481 states and 3947 transitions. Word has length 164 [2019-11-07 00:39:53,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:53,993 INFO L462 AbstractCegarLoop]: Abstraction has 2481 states and 3947 transitions. [2019-11-07 00:39:53,993 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-07 00:39:53,993 INFO L276 IsEmpty]: Start isEmpty. Operand 2481 states and 3947 transitions. [2019-11-07 00:39:54,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2019-11-07 00:39:54,000 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:54,001 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 00:39:54,208 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:54,208 INFO L410 AbstractCegarLoop]: === Iteration 22 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:54,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:54,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1312680122, now seen corresponding path program 1 times [2019-11-07 00:39:54,210 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:54,210 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345673638] [2019-11-07 00:39:54,210 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:54,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:54,395 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 00:39:54,396 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345673638] [2019-11-07 00:39:54,396 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:54,396 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2019-11-07 00:39:54,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975342294] [2019-11-07 00:39:54,397 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-07 00:39:54,397 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:54,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-07 00:39:54,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2019-11-07 00:39:54,398 INFO L87 Difference]: Start difference. First operand 2481 states and 3947 transitions. Second operand 9 states. [2019-11-07 00:39:54,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:54,650 INFO L93 Difference]: Finished difference Result 4834 states and 7730 transitions. [2019-11-07 00:39:54,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-07 00:39:54,652 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 167 [2019-11-07 00:39:54,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:54,669 INFO L225 Difference]: With dead ends: 4834 [2019-11-07 00:39:54,669 INFO L226 Difference]: Without dead ends: 2400 [2019-11-07 00:39:54,680 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 00:39:54,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2400 states. [2019-11-07 00:39:54,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2400 to 2396. [2019-11-07 00:39:54,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2396 states. [2019-11-07 00:39:54,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2396 states to 2396 states and 3820 transitions. [2019-11-07 00:39:54,813 INFO L78 Accepts]: Start accepts. Automaton has 2396 states and 3820 transitions. Word has length 167 [2019-11-07 00:39:54,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:54,813 INFO L462 AbstractCegarLoop]: Abstraction has 2396 states and 3820 transitions. [2019-11-07 00:39:54,813 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-07 00:39:54,813 INFO L276 IsEmpty]: Start isEmpty. Operand 2396 states and 3820 transitions. [2019-11-07 00:39:54,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2019-11-07 00:39:54,820 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:54,820 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 00:39:54,820 INFO L410 AbstractCegarLoop]: === Iteration 23 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:54,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:54,821 INFO L82 PathProgramCache]: Analyzing trace with hash 853816395, now seen corresponding path program 1 times [2019-11-07 00:39:54,821 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:54,821 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726824781] [2019-11-07 00:39:54,822 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:54,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:55,029 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 00:39:55,029 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726824781] [2019-11-07 00:39:55,030 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151110831] [2019-11-07 00:39:55,030 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 00:39:55,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:55,815 INFO L256 TraceCheckSpWp]: Trace formula consists of 2678 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-07 00:39:55,822 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:39:55,946 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 00:39:55,947 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:39:56,225 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 00:39:56,226 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:39:56,226 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [8] total 13 [2019-11-07 00:39:56,227 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197530558] [2019-11-07 00:39:56,227 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 00:39:56,227 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:56,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 00:39:56,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2019-11-07 00:39:56,228 INFO L87 Difference]: Start difference. First operand 2396 states and 3820 transitions. Second operand 7 states. [2019-11-07 00:39:56,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:56,338 INFO L93 Difference]: Finished difference Result 4915 states and 7915 transitions. [2019-11-07 00:39:56,338 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:39:56,338 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 170 [2019-11-07 00:39:56,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:56,356 INFO L225 Difference]: With dead ends: 4915 [2019-11-07 00:39:56,356 INFO L226 Difference]: Without dead ends: 2572 [2019-11-07 00:39:56,368 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 00:39:56,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2572 states. [2019-11-07 00:39:56,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2572 to 2564. [2019-11-07 00:39:56,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2564 states. [2019-11-07 00:39:56,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2564 states to 2564 states and 4109 transitions. [2019-11-07 00:39:56,489 INFO L78 Accepts]: Start accepts. Automaton has 2564 states and 4109 transitions. Word has length 170 [2019-11-07 00:39:56,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:56,489 INFO L462 AbstractCegarLoop]: Abstraction has 2564 states and 4109 transitions. [2019-11-07 00:39:56,489 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 00:39:56,490 INFO L276 IsEmpty]: Start isEmpty. Operand 2564 states and 4109 transitions. [2019-11-07 00:39:56,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2019-11-07 00:39:56,493 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:56,494 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 00:39:56,700 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:56,702 INFO L410 AbstractCegarLoop]: === Iteration 24 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:56,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:56,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1438221946, now seen corresponding path program 1 times [2019-11-07 00:39:56,703 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:56,704 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876413510] [2019-11-07 00:39:56,704 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:56,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:57,037 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 00:39:57,038 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876413510] [2019-11-07 00:39:57,038 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092118529] [2019-11-07 00:39:57,038 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 00:39:57,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:57,571 INFO L256 TraceCheckSpWp]: Trace formula consists of 2700 conjuncts, 49 conjunts are in the unsatisfiable core [2019-11-07 00:39:57,577 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:39:57,665 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 00:39:57,666 INFO L321 TraceCheckSpWp]: Computing backward predicates...