/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/product-lines/elevator_spec13_product23.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 00:38:34,053 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 00:38:34,057 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 00:38:34,076 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 00:38:34,077 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 00:38:34,079 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 00:38:34,081 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 00:38:34,090 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 00:38:34,093 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 00:38:34,096 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 00:38:34,097 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 00:38:34,099 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 00:38:34,099 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 00:38:34,101 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 00:38:34,103 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 00:38:34,105 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 00:38:34,107 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 00:38:34,108 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 00:38:34,110 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 00:38:34,115 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 00:38:34,120 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 00:38:34,123 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 00:38:34,126 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 00:38:34,127 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 00:38:34,129 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-07 00:38:34,130 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-07 00:38:34,130 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-07 00:38:34,131 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-07 00:38:34,132 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-07 00:38:34,134 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-07 00:38:34,134 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-07 00:38:34,135 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-07 00:38:34,137 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-07 00:38:34,138 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-07 00:38:34,139 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-07 00:38:34,139 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-07 00:38:34,140 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-07 00:38:34,140 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-07 00:38:34,140 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 00:38:34,143 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 00:38:34,144 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 00:38:34,144 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-07 00:38:34,176 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 00:38:34,177 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 00:38:34,181 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 00:38:34,181 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 00:38:34,181 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 00:38:34,182 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 00:38:34,182 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 00:38:34,182 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 00:38:34,182 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 00:38:34,182 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 00:38:34,184 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 00:38:34,185 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 00:38:34,185 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 00:38:34,185 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 00:38:34,185 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 00:38:34,185 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 00:38:34,186 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 00:38:34,186 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 00:38:34,186 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 00:38:34,187 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 00:38:34,187 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 00:38:34,187 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 00:38:34,187 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 00:38:34,187 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 00:38:34,188 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 00:38:34,188 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 00:38:34,188 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 00:38:34,188 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 00:38:34,188 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-11-07 00:38:34,470 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 00:38:34,487 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 00:38:34,491 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 00:38:34,492 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 00:38:34,493 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 00:38:34,493 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec13_product23.cil.c [2019-11-07 00:38:34,572 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a4929792/83a8f5f91b4a4ed9ba702b36868cbb4b/FLAGa8bd82e7b [2019-11-07 00:38:35,248 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 00:38:35,249 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec13_product23.cil.c [2019-11-07 00:38:35,282 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a4929792/83a8f5f91b4a4ed9ba702b36868cbb4b/FLAGa8bd82e7b [2019-11-07 00:38:35,418 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a4929792/83a8f5f91b4a4ed9ba702b36868cbb4b [2019-11-07 00:38:35,431 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 00:38:35,432 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 00:38:35,433 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 00:38:35,433 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 00:38:35,437 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 00:38:35,438 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:38:35" (1/1) ... [2019-11-07 00:38:35,441 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e5178d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:38:35, skipping insertion in model container [2019-11-07 00:38:35,441 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:38:35" (1/1) ... [2019-11-07 00:38:35,449 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 00:38:35,529 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 00:38:36,223 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 00:38:36,248 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 00:38:36,428 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 00:38:36,492 INFO L192 MainTranslator]: Completed translation [2019-11-07 00:38:36,492 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:38:36 WrapperNode [2019-11-07 00:38:36,492 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 00:38:36,493 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 00:38:36,493 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 00:38:36,494 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 00:38:36,509 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:38:36" (1/1) ... [2019-11-07 00:38:36,509 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:38:36" (1/1) ... [2019-11-07 00:38:36,542 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:38:36" (1/1) ... [2019-11-07 00:38:36,542 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:38:36" (1/1) ... [2019-11-07 00:38:36,604 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:38:36" (1/1) ... [2019-11-07 00:38:36,640 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:38:36" (1/1) ... [2019-11-07 00:38:36,660 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:38:36" (1/1) ... [2019-11-07 00:38:36,694 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 00:38:36,698 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 00:38:36,698 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 00:38:36,699 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 00:38:36,702 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:38:36" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 00:38:36,787 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 00:38:36,787 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 00:38:36,787 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-11-07 00:38:36,788 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-11-07 00:38:36,788 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-11-07 00:38:36,789 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification13_spec__1 [2019-11-07 00:38:36,789 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification13_spec__2 [2019-11-07 00:38:36,790 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-11-07 00:38:36,791 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-11-07 00:38:36,791 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-11-07 00:38:36,791 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-11-07 00:38:36,792 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-11-07 00:38:36,792 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-11-07 00:38:36,793 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-11-07 00:38:36,793 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-11-07 00:38:36,793 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-11-07 00:38:36,796 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-11-07 00:38:36,797 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-11-07 00:38:36,797 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-11-07 00:38:36,797 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-11-07 00:38:36,797 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-11-07 00:38:36,798 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-11-07 00:38:36,798 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-11-07 00:38:36,799 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-11-07 00:38:36,799 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-11-07 00:38:36,799 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2019-11-07 00:38:36,799 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__twothirdsfull [2019-11-07 00:38:36,799 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-11-07 00:38:36,799 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-11-07 00:38:36,800 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-11-07 00:38:36,800 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__weight [2019-11-07 00:38:36,800 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2019-11-07 00:38:36,800 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-11-07 00:38:36,800 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-11-07 00:38:36,801 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-11-07 00:38:36,801 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-11-07 00:38:36,802 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-11-07 00:38:36,802 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-11-07 00:38:36,802 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2019-11-07 00:38:36,802 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloor [2019-11-07 00:38:36,802 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-11-07 00:38:36,802 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-11-07 00:38:36,803 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-11-07 00:38:36,803 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-11-07 00:38:36,803 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-11-07 00:38:36,803 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-11-07 00:38:36,803 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-11-07 00:38:36,803 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-11-07 00:38:36,804 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-11-07 00:38:36,804 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-11-07 00:38:36,804 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-11-07 00:38:36,804 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-11-07 00:38:36,804 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-11-07 00:38:36,805 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-11-07 00:38:36,805 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-11-07 00:38:36,805 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-11-07 00:38:36,805 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-11-07 00:38:36,805 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-11-07 00:38:36,805 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-11-07 00:38:36,806 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 00:38:36,806 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-11-07 00:38:36,806 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-11-07 00:38:36,807 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-11-07 00:38:36,807 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-11-07 00:38:36,807 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-11-07 00:38:36,807 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-11-07 00:38:36,807 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-11-07 00:38:36,808 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-11-07 00:38:36,808 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-11-07 00:38:36,808 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-11-07 00:38:36,808 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-11-07 00:38:36,808 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-11-07 00:38:36,809 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-11-07 00:38:36,809 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-11-07 00:38:36,810 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-11-07 00:38:36,810 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-11-07 00:38:36,810 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-11-07 00:38:36,810 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-11-07 00:38:36,810 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 00:38:36,811 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 00:38:36,811 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-11-07 00:38:36,811 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-11-07 00:38:36,812 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-11-07 00:38:36,812 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-11-07 00:38:36,812 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-11-07 00:38:36,813 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-11-07 00:38:36,813 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-11-07 00:38:36,814 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-11-07 00:38:36,814 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification13_spec__1 [2019-11-07 00:38:36,814 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-11-07 00:38:36,814 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification13_spec__2 [2019-11-07 00:38:36,814 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-11-07 00:38:36,815 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-11-07 00:38:36,815 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-11-07 00:38:36,815 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-11-07 00:38:36,815 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-11-07 00:38:36,815 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-11-07 00:38:36,815 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-11-07 00:38:36,816 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-11-07 00:38:36,816 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-11-07 00:38:36,816 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-11-07 00:38:36,816 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-11-07 00:38:36,816 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-11-07 00:38:36,817 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-11-07 00:38:36,817 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-11-07 00:38:36,817 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-11-07 00:38:36,817 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-11-07 00:38:36,817 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-11-07 00:38:36,817 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-11-07 00:38:36,818 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-11-07 00:38:36,818 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-11-07 00:38:36,818 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-11-07 00:38:36,818 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-11-07 00:38:36,818 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-11-07 00:38:36,819 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-11-07 00:38:36,819 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-11-07 00:38:36,819 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2019-11-07 00:38:36,819 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloor [2019-11-07 00:38:36,820 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-11-07 00:38:36,820 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-11-07 00:38:36,820 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-11-07 00:38:36,820 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-11-07 00:38:36,821 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-11-07 00:38:36,821 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-11-07 00:38:36,822 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2019-11-07 00:38:36,822 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__twothirdsfull [2019-11-07 00:38:36,822 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-11-07 00:38:36,823 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-11-07 00:38:36,823 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__weight [2019-11-07 00:38:36,823 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2019-11-07 00:38:36,823 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-11-07 00:38:36,824 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-11-07 00:38:36,824 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-11-07 00:38:36,824 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 00:38:36,824 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-07 00:38:36,825 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-11-07 00:38:36,825 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-11-07 00:38:36,828 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-11-07 00:38:36,829 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-11-07 00:38:36,829 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-11-07 00:38:36,830 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-11-07 00:38:36,830 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-11-07 00:38:36,830 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-11-07 00:38:36,831 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-11-07 00:38:36,837 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-11-07 00:38:36,837 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-11-07 00:38:36,837 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-11-07 00:38:36,838 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-11-07 00:38:36,839 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-11-07 00:38:36,839 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 00:38:36,839 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-11-07 00:38:36,839 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-07 00:38:36,839 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-07 00:38:36,840 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-11-07 00:38:36,840 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-07 00:38:36,840 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-07 00:38:36,840 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 00:38:36,840 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-07 00:38:36,840 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-11-07 00:38:36,840 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 00:38:36,841 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-11-07 00:38:36,841 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-11-07 00:38:36,841 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 00:38:36,841 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-11-07 00:38:36,841 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-11-07 00:38:36,841 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-11-07 00:38:36,841 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-11-07 00:38:36,842 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-11-07 00:38:36,842 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 00:38:36,842 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-07 00:38:36,842 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 00:38:39,488 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 00:38:39,489 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-11-07 00:38:39,490 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:38:39 BoogieIcfgContainer [2019-11-07 00:38:39,491 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 00:38:39,493 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 00:38:39,493 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 00:38:39,496 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 00:38:39,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:38:35" (1/3) ... [2019-11-07 00:38:39,497 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e43c259 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:38:39, skipping insertion in model container [2019-11-07 00:38:39,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:38:36" (2/3) ... [2019-11-07 00:38:39,498 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e43c259 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:38:39, skipping insertion in model container [2019-11-07 00:38:39,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:38:39" (3/3) ... [2019-11-07 00:38:39,501 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec13_product23.cil.c [2019-11-07 00:38:39,511 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 00:38:39,522 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 00:38:39,533 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 00:38:39,576 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 00:38:39,577 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 00:38:39,577 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 00:38:39,577 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 00:38:39,577 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 00:38:39,577 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 00:38:39,577 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 00:38:39,577 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 00:38:39,621 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states. [2019-11-07 00:38:39,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-11-07 00:38:39,655 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:38:39,656 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:38:39,658 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:38:39,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:38:39,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1416283797, now seen corresponding path program 1 times [2019-11-07 00:38:39,674 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:38:39,674 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84857178] [2019-11-07 00:38:39,675 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:38:40,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:40,378 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-07 00:38:40,378 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84857178] [2019-11-07 00:38:40,379 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528883423] [2019-11-07 00:38:40,380 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:38:41,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:41,072 INFO L256 TraceCheckSpWp]: Trace formula consists of 3003 conjuncts, 1 conjunts are in the unsatisfiable core [2019-11-07 00:38:41,089 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:38:41,137 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2019-11-07 00:38:41,137 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:38:41,380 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-07 00:38:41,381 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:38:41,381 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7, 2] total 7 [2019-11-07 00:38:41,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738599723] [2019-11-07 00:38:41,388 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-07 00:38:41,390 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:38:41,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-07 00:38:41,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:38:41,408 INFO L87 Difference]: Start difference. First operand 816 states. Second operand 2 states. [2019-11-07 00:38:41,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:38:41,547 INFO L93 Difference]: Finished difference Result 1325 states and 2137 transitions. [2019-11-07 00:38:41,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-07 00:38:41,549 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 161 [2019-11-07 00:38:41,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:38:41,591 INFO L225 Difference]: With dead ends: 1325 [2019-11-07 00:38:41,591 INFO L226 Difference]: Without dead ends: 670 [2019-11-07 00:38:41,604 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:38:41,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2019-11-07 00:38:41,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 670. [2019-11-07 00:38:41,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 670 states. [2019-11-07 00:38:41,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 1060 transitions. [2019-11-07 00:38:41,747 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 1060 transitions. Word has length 161 [2019-11-07 00:38:41,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:38:41,750 INFO L462 AbstractCegarLoop]: Abstraction has 670 states and 1060 transitions. [2019-11-07 00:38:41,750 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-07 00:38:41,750 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 1060 transitions. [2019-11-07 00:38:41,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-11-07 00:38:41,760 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:38:41,761 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:38:41,968 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:38:41,973 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:38:41,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:38:41,974 INFO L82 PathProgramCache]: Analyzing trace with hash -2071718859, now seen corresponding path program 1 times [2019-11-07 00:38:41,974 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:38:41,974 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019458490] [2019-11-07 00:38:41,974 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:38:42,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:42,242 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-07 00:38:42,243 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019458490] [2019-11-07 00:38:42,243 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214565390] [2019-11-07 00:38:42,243 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:38:42,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:42,853 INFO L256 TraceCheckSpWp]: Trace formula consists of 2997 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:38:42,869 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:38:42,932 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-11-07 00:38:42,933 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:38:43,146 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-07 00:38:43,147 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:38:43,147 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 4] total 10 [2019-11-07 00:38:43,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709684216] [2019-11-07 00:38:43,149 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:38:43,150 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:38:43,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:38:43,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-11-07 00:38:43,151 INFO L87 Difference]: Start difference. First operand 670 states and 1060 transitions. Second operand 4 states. [2019-11-07 00:38:43,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:38:43,315 INFO L93 Difference]: Finished difference Result 1323 states and 2110 transitions. [2019-11-07 00:38:43,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:38:43,317 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 161 [2019-11-07 00:38:43,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:38:43,324 INFO L225 Difference]: With dead ends: 1323 [2019-11-07 00:38:43,324 INFO L226 Difference]: Without dead ends: 679 [2019-11-07 00:38:43,329 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 320 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-11-07 00:38:43,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2019-11-07 00:38:43,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 679. [2019-11-07 00:38:43,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 679 states. [2019-11-07 00:38:43,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 1074 transitions. [2019-11-07 00:38:43,383 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 1074 transitions. Word has length 161 [2019-11-07 00:38:43,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:38:43,385 INFO L462 AbstractCegarLoop]: Abstraction has 679 states and 1074 transitions. [2019-11-07 00:38:43,385 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:38:43,385 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 1074 transitions. [2019-11-07 00:38:43,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-11-07 00:38:43,391 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:38:43,392 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:38:43,599 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:38:43,600 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:38:43,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:38:43,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1394548635, now seen corresponding path program 1 times [2019-11-07 00:38:43,601 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:38:43,601 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086910573] [2019-11-07 00:38:43,602 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:38:43,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:43,774 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2019-11-07 00:38:43,775 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086910573] [2019-11-07 00:38:43,775 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061343983] [2019-11-07 00:38:43,776 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:38:44,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:44,354 INFO L256 TraceCheckSpWp]: Trace formula consists of 2999 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-07 00:38:44,362 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:38:44,449 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 00:38:44,449 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:38:44,767 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2019-11-07 00:38:44,768 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:38:44,768 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 16 [2019-11-07 00:38:44,768 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648927585] [2019-11-07 00:38:44,769 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 00:38:44,769 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:38:44,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 00:38:44,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2019-11-07 00:38:44,770 INFO L87 Difference]: Start difference. First operand 679 states and 1074 transitions. Second operand 7 states. [2019-11-07 00:38:44,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:38:44,942 INFO L93 Difference]: Finished difference Result 1341 states and 2135 transitions. [2019-11-07 00:38:44,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:38:44,943 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 163 [2019-11-07 00:38:44,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:38:44,948 INFO L225 Difference]: With dead ends: 1341 [2019-11-07 00:38:44,949 INFO L226 Difference]: Without dead ends: 690 [2019-11-07 00:38:44,952 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 316 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2019-11-07 00:38:44,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2019-11-07 00:38:44,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 686. [2019-11-07 00:38:44,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 686 states. [2019-11-07 00:38:44,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 686 states to 686 states and 1086 transitions. [2019-11-07 00:38:44,989 INFO L78 Accepts]: Start accepts. Automaton has 686 states and 1086 transitions. Word has length 163 [2019-11-07 00:38:44,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:38:44,990 INFO L462 AbstractCegarLoop]: Abstraction has 686 states and 1086 transitions. [2019-11-07 00:38:44,990 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 00:38:44,990 INFO L276 IsEmpty]: Start isEmpty. Operand 686 states and 1086 transitions. [2019-11-07 00:38:44,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2019-11-07 00:38:44,998 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:38:44,998 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:38:45,214 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:38:45,215 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:38:45,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:38:45,215 INFO L82 PathProgramCache]: Analyzing trace with hash -146815623, now seen corresponding path program 1 times [2019-11-07 00:38:45,216 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:38:45,216 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499892315] [2019-11-07 00:38:45,217 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:38:45,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:45,405 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-07 00:38:45,405 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499892315] [2019-11-07 00:38:45,405 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461982399] [2019-11-07 00:38:45,406 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:38:46,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:46,023 INFO L256 TraceCheckSpWp]: Trace formula consists of 3000 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:38:46,031 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:38:46,074 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-11-07 00:38:46,074 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:38:46,270 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-07 00:38:46,270 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:38:46,271 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-11-07 00:38:46,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172218862] [2019-11-07 00:38:46,271 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:38:46,272 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:38:46,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:38:46,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:38:46,273 INFO L87 Difference]: Start difference. First operand 686 states and 1086 transitions. Second operand 4 states. [2019-11-07 00:38:46,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:38:46,386 INFO L93 Difference]: Finished difference Result 1357 states and 2160 transitions. [2019-11-07 00:38:46,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:38:46,386 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 164 [2019-11-07 00:38:46,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:38:46,395 INFO L225 Difference]: With dead ends: 1357 [2019-11-07 00:38:46,395 INFO L226 Difference]: Without dead ends: 697 [2019-11-07 00:38:46,401 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 324 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:38:46,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2019-11-07 00:38:46,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 695. [2019-11-07 00:38:46,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 695 states. [2019-11-07 00:38:46,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 1094 transitions. [2019-11-07 00:38:46,435 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 1094 transitions. Word has length 164 [2019-11-07 00:38:46,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:38:46,435 INFO L462 AbstractCegarLoop]: Abstraction has 695 states and 1094 transitions. [2019-11-07 00:38:46,435 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:38:46,436 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 1094 transitions. [2019-11-07 00:38:46,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2019-11-07 00:38:46,441 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:38:46,442 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:38:46,654 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:38:46,655 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:38:46,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:38:46,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1430842587, now seen corresponding path program 1 times [2019-11-07 00:38:46,656 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:38:46,656 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546959343] [2019-11-07 00:38:46,657 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:38:46,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:46,817 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2019-11-07 00:38:46,817 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546959343] [2019-11-07 00:38:46,818 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714687499] [2019-11-07 00:38:46,818 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:38:47,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:47,378 INFO L256 TraceCheckSpWp]: Trace formula consists of 3000 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-07 00:38:47,383 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:38:47,458 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 00:38:47,458 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:38:47,773 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2019-11-07 00:38:47,774 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:38:47,774 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 16 [2019-11-07 00:38:47,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53042582] [2019-11-07 00:38:47,775 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 00:38:47,775 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:38:47,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 00:38:47,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2019-11-07 00:38:47,776 INFO L87 Difference]: Start difference. First operand 695 states and 1094 transitions. Second operand 7 states. [2019-11-07 00:38:47,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:38:47,934 INFO L93 Difference]: Finished difference Result 1358 states and 2151 transitions. [2019-11-07 00:38:47,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:38:47,935 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 164 [2019-11-07 00:38:47,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:38:47,940 INFO L225 Difference]: With dead ends: 1358 [2019-11-07 00:38:47,940 INFO L226 Difference]: Without dead ends: 704 [2019-11-07 00:38:47,944 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 318 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2019-11-07 00:38:47,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2019-11-07 00:38:47,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 695. [2019-11-07 00:38:47,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 695 states. [2019-11-07 00:38:47,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 1094 transitions. [2019-11-07 00:38:47,973 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 1094 transitions. Word has length 164 [2019-11-07 00:38:47,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:38:47,973 INFO L462 AbstractCegarLoop]: Abstraction has 695 states and 1094 transitions. [2019-11-07 00:38:47,974 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 00:38:47,974 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 1094 transitions. [2019-11-07 00:38:47,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2019-11-07 00:38:47,980 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:38:47,980 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:38:48,188 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:38:48,188 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:38:48,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:38:48,188 INFO L82 PathProgramCache]: Analyzing trace with hash -907404626, now seen corresponding path program 1 times [2019-11-07 00:38:48,189 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:38:48,189 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662383696] [2019-11-07 00:38:48,189 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:38:48,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:48,313 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-07 00:38:48,313 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662383696] [2019-11-07 00:38:48,314 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792927005] [2019-11-07 00:38:48,314 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:38:49,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:49,025 INFO L256 TraceCheckSpWp]: Trace formula consists of 3002 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:38:49,032 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:38:49,118 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 00:38:49,119 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:38:49,264 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-11-07 00:38:49,266 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:38:49,266 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-11-07 00:38:49,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584833340] [2019-11-07 00:38:49,268 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:38:49,270 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:38:49,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:38:49,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:38:49,270 INFO L87 Difference]: Start difference. First operand 695 states and 1094 transitions. Second operand 4 states. [2019-11-07 00:38:49,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:38:49,511 INFO L93 Difference]: Finished difference Result 1391 states and 2221 transitions. [2019-11-07 00:38:49,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:38:49,512 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 167 [2019-11-07 00:38:49,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:38:49,517 INFO L225 Difference]: With dead ends: 1391 [2019-11-07 00:38:49,518 INFO L226 Difference]: Without dead ends: 737 [2019-11-07 00:38:49,521 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 330 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:38:49,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2019-11-07 00:38:49,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 734. [2019-11-07 00:38:49,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 734 states. [2019-11-07 00:38:49,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 1167 transitions. [2019-11-07 00:38:49,548 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 1167 transitions. Word has length 167 [2019-11-07 00:38:49,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:38:49,549 INFO L462 AbstractCegarLoop]: Abstraction has 734 states and 1167 transitions. [2019-11-07 00:38:49,549 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:38:49,549 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 1167 transitions. [2019-11-07 00:38:49,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2019-11-07 00:38:49,555 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:38:49,555 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:38:49,762 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:38:49,762 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:38:49,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:38:49,763 INFO L82 PathProgramCache]: Analyzing trace with hash -548552272, now seen corresponding path program 1 times [2019-11-07 00:38:49,764 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:38:49,764 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948006181] [2019-11-07 00:38:49,764 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:38:49,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:49,895 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-11-07 00:38:49,896 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948006181] [2019-11-07 00:38:49,896 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594159069] [2019-11-07 00:38:49,896 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:38:50,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:50,526 INFO L256 TraceCheckSpWp]: Trace formula consists of 3004 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:38:50,534 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:38:50,571 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-07 00:38:50,571 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:38:50,836 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-11-07 00:38:50,837 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:38:50,837 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [4] total 7 [2019-11-07 00:38:50,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390502703] [2019-11-07 00:38:50,839 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 00:38:50,839 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:38:50,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 00:38:50,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:38:50,840 INFO L87 Difference]: Start difference. First operand 734 states and 1167 transitions. Second operand 5 states. [2019-11-07 00:38:50,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:38:50,944 INFO L93 Difference]: Finished difference Result 1415 states and 2267 transitions. [2019-11-07 00:38:50,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:38:50,945 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 169 [2019-11-07 00:38:50,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:38:50,952 INFO L225 Difference]: With dead ends: 1415 [2019-11-07 00:38:50,953 INFO L226 Difference]: Without dead ends: 734 [2019-11-07 00:38:50,958 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 335 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:38:50,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2019-11-07 00:38:50,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 734. [2019-11-07 00:38:50,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 734 states. [2019-11-07 00:38:50,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 1162 transitions. [2019-11-07 00:38:50,995 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 1162 transitions. Word has length 169 [2019-11-07 00:38:50,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:38:50,996 INFO L462 AbstractCegarLoop]: Abstraction has 734 states and 1162 transitions. [2019-11-07 00:38:50,996 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 00:38:50,996 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 1162 transitions. [2019-11-07 00:38:51,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2019-11-07 00:38:51,005 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:38:51,006 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:38:51,216 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:38:51,217 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:38:51,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:38:51,217 INFO L82 PathProgramCache]: Analyzing trace with hash -981805208, now seen corresponding path program 1 times [2019-11-07 00:38:51,218 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:38:51,218 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276703176] [2019-11-07 00:38:51,218 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:38:51,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:51,371 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-11-07 00:38:51,372 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276703176] [2019-11-07 00:38:51,376 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729075631] [2019-11-07 00:38:51,376 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:38:51,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:51,927 INFO L256 TraceCheckSpWp]: Trace formula consists of 3005 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-07 00:38:51,933 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:38:52,007 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-11-07 00:38:52,008 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:38:52,241 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-11-07 00:38:52,242 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:38:52,242 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 13 [2019-11-07 00:38:52,245 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353897158] [2019-11-07 00:38:52,246 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-07 00:38:52,247 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:38:52,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-07 00:38:52,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2019-11-07 00:38:52,247 INFO L87 Difference]: Start difference. First operand 734 states and 1162 transitions. Second operand 11 states. [2019-11-07 00:38:52,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:38:52,448 INFO L93 Difference]: Finished difference Result 1389 states and 2208 transitions. [2019-11-07 00:38:52,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-07 00:38:52,448 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 170 [2019-11-07 00:38:52,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:38:52,455 INFO L225 Difference]: With dead ends: 1389 [2019-11-07 00:38:52,455 INFO L226 Difference]: Without dead ends: 754 [2019-11-07 00:38:52,460 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 331 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2019-11-07 00:38:52,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2019-11-07 00:38:52,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 741. [2019-11-07 00:38:52,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 741 states. [2019-11-07 00:38:52,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 1173 transitions. [2019-11-07 00:38:52,508 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 1173 transitions. Word has length 170 [2019-11-07 00:38:52,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:38:52,511 INFO L462 AbstractCegarLoop]: Abstraction has 741 states and 1173 transitions. [2019-11-07 00:38:52,511 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-07 00:38:52,511 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 1173 transitions. [2019-11-07 00:38:52,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-11-07 00:38:52,517 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:38:52,517 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:38:52,733 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:38:52,734 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:38:52,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:38:52,734 INFO L82 PathProgramCache]: Analyzing trace with hash -304800936, now seen corresponding path program 1 times [2019-11-07 00:38:52,734 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:38:52,734 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478587806] [2019-11-07 00:38:52,735 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:38:52,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:52,894 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-11-07 00:38:52,894 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478587806] [2019-11-07 00:38:52,895 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62704539] [2019-11-07 00:38:52,895 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:38:53,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:53,572 INFO L256 TraceCheckSpWp]: Trace formula consists of 3006 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-07 00:38:53,581 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:38:53,644 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-11-07 00:38:53,644 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:38:53,871 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-11-07 00:38:53,871 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:38:53,871 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 10 [2019-11-07 00:38:53,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847454259] [2019-11-07 00:38:53,872 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-07 00:38:53,873 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:38:53,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-07 00:38:53,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-11-07 00:38:53,873 INFO L87 Difference]: Start difference. First operand 741 states and 1173 transitions. Second operand 8 states. [2019-11-07 00:38:54,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:38:54,005 INFO L93 Difference]: Finished difference Result 1387 states and 2204 transitions. [2019-11-07 00:38:54,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:38:54,005 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 171 [2019-11-07 00:38:54,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:38:54,012 INFO L225 Difference]: With dead ends: 1387 [2019-11-07 00:38:54,012 INFO L226 Difference]: Without dead ends: 752 [2019-11-07 00:38:54,016 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 333 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2019-11-07 00:38:54,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2019-11-07 00:38:54,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 745. [2019-11-07 00:38:54,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 745 states. [2019-11-07 00:38:54,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 1178 transitions. [2019-11-07 00:38:54,044 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 1178 transitions. Word has length 171 [2019-11-07 00:38:54,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:38:54,044 INFO L462 AbstractCegarLoop]: Abstraction has 745 states and 1178 transitions. [2019-11-07 00:38:54,044 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-07 00:38:54,044 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 1178 transitions. [2019-11-07 00:38:54,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2019-11-07 00:38:54,050 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:38:54,051 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:38:54,266 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:38:54,267 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:38:54,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:38:54,267 INFO L82 PathProgramCache]: Analyzing trace with hash 873328068, now seen corresponding path program 1 times [2019-11-07 00:38:54,268 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:38:54,268 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580207483] [2019-11-07 00:38:54,268 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:38:54,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:54,411 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-11-07 00:38:54,411 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580207483] [2019-11-07 00:38:54,411 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373583793] [2019-11-07 00:38:54,412 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:38:55,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:55,079 INFO L256 TraceCheckSpWp]: Trace formula consists of 3007 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:38:55,083 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:38:55,116 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-07 00:38:55,117 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:38:55,253 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-07 00:38:55,253 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:38:55,253 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [4] total 7 [2019-11-07 00:38:55,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030027254] [2019-11-07 00:38:55,254 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 00:38:55,255 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:38:55,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 00:38:55,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:38:55,255 INFO L87 Difference]: Start difference. First operand 745 states and 1178 transitions. Second operand 5 states. [2019-11-07 00:38:55,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:38:55,477 INFO L93 Difference]: Finished difference Result 1425 states and 2281 transitions. [2019-11-07 00:38:55,477 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:38:55,477 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 172 [2019-11-07 00:38:55,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:38:55,483 INFO L225 Difference]: With dead ends: 1425 [2019-11-07 00:38:55,484 INFO L226 Difference]: Without dead ends: 790 [2019-11-07 00:38:55,487 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 341 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:38:55,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2019-11-07 00:38:55,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 787. [2019-11-07 00:38:55,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 787 states. [2019-11-07 00:38:55,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 1254 transitions. [2019-11-07 00:38:55,517 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 1254 transitions. Word has length 172 [2019-11-07 00:38:55,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:38:55,518 INFO L462 AbstractCegarLoop]: Abstraction has 787 states and 1254 transitions. [2019-11-07 00:38:55,518 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 00:38:55,518 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 1254 transitions. [2019-11-07 00:38:55,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2019-11-07 00:38:55,532 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:38:55,533 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:38:55,739 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:38:55,741 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:38:55,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:38:55,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1863930726, now seen corresponding path program 1 times [2019-11-07 00:38:55,741 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:38:55,741 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215986935] [2019-11-07 00:38:55,742 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:38:55,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:55,856 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-11-07 00:38:55,856 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215986935] [2019-11-07 00:38:55,857 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116362968] [2019-11-07 00:38:55,857 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:38:56,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:56,587 INFO L256 TraceCheckSpWp]: Trace formula consists of 3008 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:38:56,592 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:38:56,620 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-07 00:38:56,620 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:38:56,746 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-11-07 00:38:56,747 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:38:56,747 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [4] total 8 [2019-11-07 00:38:56,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201327595] [2019-11-07 00:38:56,748 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 00:38:56,748 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:38:56,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 00:38:56,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:38:56,749 INFO L87 Difference]: Start difference. First operand 787 states and 1254 transitions. Second operand 6 states. [2019-11-07 00:38:56,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:38:56,860 INFO L93 Difference]: Finished difference Result 1479 states and 2366 transitions. [2019-11-07 00:38:56,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:38:56,860 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 173 [2019-11-07 00:38:56,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:38:56,869 INFO L225 Difference]: With dead ends: 1479 [2019-11-07 00:38:56,869 INFO L226 Difference]: Without dead ends: 783 [2019-11-07 00:38:56,873 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 344 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2019-11-07 00:38:56,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2019-11-07 00:38:56,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 780. [2019-11-07 00:38:56,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 780 states. [2019-11-07 00:38:56,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 1241 transitions. [2019-11-07 00:38:56,915 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 1241 transitions. Word has length 173 [2019-11-07 00:38:56,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:38:56,915 INFO L462 AbstractCegarLoop]: Abstraction has 780 states and 1241 transitions. [2019-11-07 00:38:56,916 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 00:38:56,916 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 1241 transitions. [2019-11-07 00:38:56,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2019-11-07 00:38:56,922 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:38:56,923 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:38:57,132 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:38:57,132 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:38:57,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:38:57,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1965179543, now seen corresponding path program 1 times [2019-11-07 00:38:57,133 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:38:57,133 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280282890] [2019-11-07 00:38:57,134 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:38:57,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:57,239 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-11-07 00:38:57,240 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280282890] [2019-11-07 00:38:57,240 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474774005] [2019-11-07 00:38:57,240 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:38:57,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:57,880 INFO L256 TraceCheckSpWp]: Trace formula consists of 3008 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 00:38:57,885 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:38:57,938 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-07 00:38:57,938 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:38:58,215 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-11-07 00:38:58,215 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:38:58,215 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 6] total 11 [2019-11-07 00:38:58,217 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151369616] [2019-11-07 00:38:58,219 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 00:38:58,219 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:38:58,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 00:38:58,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-11-07 00:38:58,220 INFO L87 Difference]: Start difference. First operand 780 states and 1241 transitions. Second operand 5 states. [2019-11-07 00:38:59,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:38:59,172 INFO L93 Difference]: Finished difference Result 1419 states and 2295 transitions. [2019-11-07 00:38:59,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 00:38:59,173 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 174 [2019-11-07 00:38:59,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:38:59,179 INFO L225 Difference]: With dead ends: 1419 [2019-11-07 00:38:59,179 INFO L226 Difference]: Without dead ends: 788 [2019-11-07 00:38:59,183 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 338 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2019-11-07 00:38:59,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2019-11-07 00:38:59,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 788. [2019-11-07 00:38:59,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 788 states. [2019-11-07 00:38:59,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 1254 transitions. [2019-11-07 00:38:59,211 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 1254 transitions. Word has length 174 [2019-11-07 00:38:59,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:38:59,211 INFO L462 AbstractCegarLoop]: Abstraction has 788 states and 1254 transitions. [2019-11-07 00:38:59,211 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 00:38:59,211 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 1254 transitions. [2019-11-07 00:38:59,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2019-11-07 00:38:59,217 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:38:59,217 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:38:59,423 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:38:59,424 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:38:59,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:38:59,424 INFO L82 PathProgramCache]: Analyzing trace with hash -97511625, now seen corresponding path program 1 times [2019-11-07 00:38:59,424 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:38:59,424 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631449922] [2019-11-07 00:38:59,425 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:38:59,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:59,522 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-11-07 00:38:59,522 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631449922] [2019-11-07 00:38:59,522 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465192980] [2019-11-07 00:38:59,522 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:00,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:00,166 INFO L256 TraceCheckSpWp]: Trace formula consists of 3010 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 00:39:00,174 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:39:00,216 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-07 00:39:00,217 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:39:00,511 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-11-07 00:39:00,512 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:39:00,512 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 6] total 11 [2019-11-07 00:39:00,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005096801] [2019-11-07 00:39:00,513 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 00:39:00,513 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:00,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 00:39:00,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-11-07 00:39:00,513 INFO L87 Difference]: Start difference. First operand 788 states and 1254 transitions. Second operand 5 states. [2019-11-07 00:39:01,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:01,410 INFO L93 Difference]: Finished difference Result 1435 states and 2318 transitions. [2019-11-07 00:39:01,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 00:39:01,411 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 176 [2019-11-07 00:39:01,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:01,417 INFO L225 Difference]: With dead ends: 1435 [2019-11-07 00:39:01,417 INFO L226 Difference]: Without dead ends: 796 [2019-11-07 00:39:01,421 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 342 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2019-11-07 00:39:01,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 796 states. [2019-11-07 00:39:01,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 796 to 796. [2019-11-07 00:39:01,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 796 states. [2019-11-07 00:39:01,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 1267 transitions. [2019-11-07 00:39:01,448 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 1267 transitions. Word has length 176 [2019-11-07 00:39:01,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:01,448 INFO L462 AbstractCegarLoop]: Abstraction has 796 states and 1267 transitions. [2019-11-07 00:39:01,448 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 00:39:01,449 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 1267 transitions. [2019-11-07 00:39:01,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2019-11-07 00:39:01,454 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:01,455 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:39:01,662 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:01,662 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:01,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:01,663 INFO L82 PathProgramCache]: Analyzing trace with hash 654361559, now seen corresponding path program 1 times [2019-11-07 00:39:01,663 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:01,665 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142621840] [2019-11-07 00:39:01,665 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:01,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:01,778 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-11-07 00:39:01,778 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142621840] [2019-11-07 00:39:01,779 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048815854] [2019-11-07 00:39:01,779 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:02,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:02,426 INFO L256 TraceCheckSpWp]: Trace formula consists of 3012 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 00:39:02,430 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:39:02,479 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-07 00:39:02,480 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:39:02,751 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-11-07 00:39:02,752 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:39:02,752 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 6] total 11 [2019-11-07 00:39:02,752 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148335909] [2019-11-07 00:39:02,752 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 00:39:02,753 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:02,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 00:39:02,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-11-07 00:39:02,753 INFO L87 Difference]: Start difference. First operand 796 states and 1267 transitions. Second operand 5 states. [2019-11-07 00:39:03,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:03,674 INFO L93 Difference]: Finished difference Result 1451 states and 2341 transitions. [2019-11-07 00:39:03,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 00:39:03,675 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 178 [2019-11-07 00:39:03,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:03,679 INFO L225 Difference]: With dead ends: 1451 [2019-11-07 00:39:03,679 INFO L226 Difference]: Without dead ends: 804 [2019-11-07 00:39:03,683 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 346 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2019-11-07 00:39:03,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2019-11-07 00:39:03,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 804. [2019-11-07 00:39:03,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 804 states. [2019-11-07 00:39:03,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 1280 transitions. [2019-11-07 00:39:03,712 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 1280 transitions. Word has length 178 [2019-11-07 00:39:03,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:03,715 INFO L462 AbstractCegarLoop]: Abstraction has 804 states and 1280 transitions. [2019-11-07 00:39:03,715 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 00:39:03,715 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 1280 transitions. [2019-11-07 00:39:03,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2019-11-07 00:39:03,720 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:03,721 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:39:03,929 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:03,929 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:03,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:03,930 INFO L82 PathProgramCache]: Analyzing trace with hash -946321425, now seen corresponding path program 1 times [2019-11-07 00:39:03,930 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:03,930 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784857499] [2019-11-07 00:39:03,930 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:04,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:04,194 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-07 00:39:04,195 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784857499] [2019-11-07 00:39:04,195 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986604452] [2019-11-07 00:39:04,195 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:04,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:04,960 INFO L256 TraceCheckSpWp]: Trace formula consists of 3014 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 00:39:04,964 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:39:05,007 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-07 00:39:05,007 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:39:05,265 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-11-07 00:39:05,266 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:39:05,266 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 6] total 10 [2019-11-07 00:39:05,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689806519] [2019-11-07 00:39:05,266 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 00:39:05,266 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:05,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 00:39:05,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-11-07 00:39:05,267 INFO L87 Difference]: Start difference. First operand 804 states and 1280 transitions. Second operand 5 states. [2019-11-07 00:39:06,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:06,186 INFO L93 Difference]: Finished difference Result 1467 states and 2364 transitions. [2019-11-07 00:39:06,186 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 00:39:06,187 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 180 [2019-11-07 00:39:06,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:06,192 INFO L225 Difference]: With dead ends: 1467 [2019-11-07 00:39:06,192 INFO L226 Difference]: Without dead ends: 812 [2019-11-07 00:39:06,196 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 350 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2019-11-07 00:39:06,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2019-11-07 00:39:06,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 812. [2019-11-07 00:39:06,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 812 states. [2019-11-07 00:39:06,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 1293 transitions. [2019-11-07 00:39:06,229 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 1293 transitions. Word has length 180 [2019-11-07 00:39:06,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:06,230 INFO L462 AbstractCegarLoop]: Abstraction has 812 states and 1293 transitions. [2019-11-07 00:39:06,230 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 00:39:06,230 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 1293 transitions. [2019-11-07 00:39:06,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2019-11-07 00:39:06,235 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:06,236 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:39:06,443 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:06,443 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:06,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:06,443 INFO L82 PathProgramCache]: Analyzing trace with hash 701367063, now seen corresponding path program 1 times [2019-11-07 00:39:06,444 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:06,444 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503150239] [2019-11-07 00:39:06,444 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:06,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:06,540 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-11-07 00:39:06,540 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503150239] [2019-11-07 00:39:06,540 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325197458] [2019-11-07 00:39:06,541 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:07,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:07,264 INFO L256 TraceCheckSpWp]: Trace formula consists of 3016 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-07 00:39:07,271 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:39:07,284 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-07 00:39:07,285 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:39:07,412 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-11-07 00:39:07,412 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:39:07,412 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 5 [2019-11-07 00:39:07,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205881152] [2019-11-07 00:39:07,413 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:39:07,413 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:07,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:39:07,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-07 00:39:07,414 INFO L87 Difference]: Start difference. First operand 812 states and 1293 transitions. Second operand 4 states. [2019-11-07 00:39:07,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:07,484 INFO L93 Difference]: Finished difference Result 1583 states and 2542 transitions. [2019-11-07 00:39:07,485 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:39:07,485 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 182 [2019-11-07 00:39:07,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:07,491 INFO L225 Difference]: With dead ends: 1583 [2019-11-07 00:39:07,491 INFO L226 Difference]: Without dead ends: 789 [2019-11-07 00:39:07,494 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-11-07 00:39:07,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2019-11-07 00:39:07,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 789. [2019-11-07 00:39:07,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 789 states. [2019-11-07 00:39:07,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 1250 transitions. [2019-11-07 00:39:07,519 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 1250 transitions. Word has length 182 [2019-11-07 00:39:07,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:07,520 INFO L462 AbstractCegarLoop]: Abstraction has 789 states and 1250 transitions. [2019-11-07 00:39:07,520 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:39:07,520 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 1250 transitions. [2019-11-07 00:39:07,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2019-11-07 00:39:07,524 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:07,524 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:39:07,732 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:07,732 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:07,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:07,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1148401564, now seen corresponding path program 1 times [2019-11-07 00:39:07,733 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:07,733 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340598733] [2019-11-07 00:39:07,733 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:07,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:07,858 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-11-07 00:39:07,858 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340598733] [2019-11-07 00:39:07,858 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669991639] [2019-11-07 00:39:07,859 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:08,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:08,523 INFO L256 TraceCheckSpWp]: Trace formula consists of 3015 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-07 00:39:08,527 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:39:08,587 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 00:39:08,587 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:39:08,891 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-11-07 00:39:08,891 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:39:08,891 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 13 [2019-11-07 00:39:08,892 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356292448] [2019-11-07 00:39:08,892 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 00:39:08,892 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:08,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 00:39:08,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2019-11-07 00:39:08,893 INFO L87 Difference]: Start difference. First operand 789 states and 1250 transitions. Second operand 7 states. [2019-11-07 00:39:09,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:09,013 INFO L93 Difference]: Finished difference Result 1532 states and 2435 transitions. [2019-11-07 00:39:09,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:39:09,014 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 180 [2019-11-07 00:39:09,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:09,019 INFO L225 Difference]: With dead ends: 1532 [2019-11-07 00:39:09,019 INFO L226 Difference]: Without dead ends: 791 [2019-11-07 00:39:09,023 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 350 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2019-11-07 00:39:09,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2019-11-07 00:39:09,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 783. [2019-11-07 00:39:09,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 783 states. [2019-11-07 00:39:09,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 783 states to 783 states and 1236 transitions. [2019-11-07 00:39:09,049 INFO L78 Accepts]: Start accepts. Automaton has 783 states and 1236 transitions. Word has length 180 [2019-11-07 00:39:09,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:09,049 INFO L462 AbstractCegarLoop]: Abstraction has 783 states and 1236 transitions. [2019-11-07 00:39:09,049 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 00:39:09,049 INFO L276 IsEmpty]: Start isEmpty. Operand 783 states and 1236 transitions. [2019-11-07 00:39:09,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2019-11-07 00:39:09,055 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:09,055 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:39:09,263 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:09,263 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:09,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:09,264 INFO L82 PathProgramCache]: Analyzing trace with hash 611509978, now seen corresponding path program 1 times [2019-11-07 00:39:09,264 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:09,264 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207157172] [2019-11-07 00:39:09,264 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:09,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:09,371 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-11-07 00:39:09,372 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207157172] [2019-11-07 00:39:09,372 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19623721] [2019-11-07 00:39:09,372 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true