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_spec1_product18.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 21:09:41,271 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 21:09:41,274 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 21:09:41,295 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 21:09:41,295 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 21:09:41,297 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 21:09:41,299 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 21:09:41,309 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 21:09:41,313 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 21:09:41,317 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 21:09:41,318 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 21:09:41,320 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 21:09:41,320 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 21:09:41,322 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 21:09:41,325 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 21:09:41,326 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 21:09:41,327 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 21:09:41,328 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 21:09:41,330 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 21:09:41,335 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 21:09:41,339 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 21:09:41,342 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 21:09:41,345 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 21:09:41,346 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 21:09:41,349 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 21:09:41,349 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 21:09:41,349 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 21:09:41,351 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 21:09:41,352 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 21:09:41,353 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 21:09:41,354 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 21:09:41,354 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 21:09:41,355 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 21:09:41,356 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 21:09:41,358 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 21:09:41,358 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 21:09:41,359 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 21:09:41,359 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 21:09:41,359 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 21:09:41,360 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 21:09:41,361 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 21:09:41,362 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 21:09:41,394 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 21:09:41,396 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 21:09:41,398 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 21:09:41,398 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 21:09:41,400 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 21:09:41,401 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 21:09:41,401 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 21:09:41,401 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 21:09:41,401 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 21:09:41,401 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 21:09:41,402 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 21:09:41,402 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 21:09:41,402 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 21:09:41,402 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 21:09:41,402 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 21:09:41,402 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 21:09:41,403 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 21:09:41,403 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 21:09:41,406 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 21:09:41,406 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 21:09:41,406 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 21:09:41,407 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:09:41,407 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 21:09:41,407 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 21:09:41,407 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 21:09:41,407 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 21:09:41,408 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 21:09:41,408 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 21:09:41,408 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-13 21:09:41,714 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 21:09:41,727 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 21:09:41,731 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 21:09:41,733 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 21:09:41,734 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 21:09:41,734 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec1_product18.cil.c [2019-10-13 21:09:41,811 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd1ce83cb/d26cc787a54046db93d8239e9e50af40/FLAG3328b5519 [2019-10-13 21:09:42,471 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 21:09:42,472 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec1_product18.cil.c [2019-10-13 21:09:42,513 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd1ce83cb/d26cc787a54046db93d8239e9e50af40/FLAG3328b5519 [2019-10-13 21:09:42,632 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd1ce83cb/d26cc787a54046db93d8239e9e50af40 [2019-10-13 21:09:42,644 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 21:09:42,646 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 21:09:42,651 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 21:09:42,651 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 21:09:42,655 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 21:09:42,656 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:09:42" (1/1) ... [2019-10-13 21:09:42,659 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a57a4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:42, skipping insertion in model container [2019-10-13 21:09:42,659 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:09:42" (1/1) ... [2019-10-13 21:09:42,668 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 21:09:42,748 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 21:09:43,561 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:09:43,595 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 21:09:43,794 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:09:43,857 INFO L192 MainTranslator]: Completed translation [2019-10-13 21:09:43,858 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:43 WrapperNode [2019-10-13 21:09:43,858 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 21:09:43,859 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 21:09:43,859 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 21:09:43,859 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 21:09:43,872 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:43" (1/1) ... [2019-10-13 21:09:43,872 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:43" (1/1) ... [2019-10-13 21:09:43,905 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:43" (1/1) ... [2019-10-13 21:09:43,905 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:43" (1/1) ... [2019-10-13 21:09:43,996 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:43" (1/1) ... [2019-10-13 21:09:44,031 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:43" (1/1) ... [2019-10-13 21:09:44,051 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:43" (1/1) ... [2019-10-13 21:09:44,067 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 21:09:44,067 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 21:09:44,068 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 21:09:44,068 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 21:09:44,069 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:43" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:09:44,153 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 21:09:44,154 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 21:09:44,154 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-13 21:09:44,154 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-13 21:09:44,155 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-10-13 21:09:44,155 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-10-13 21:09:44,155 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-10-13 21:09:44,155 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-10-13 21:09:44,156 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-10-13 21:09:44,157 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-10-13 21:09:44,157 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-10-13 21:09:44,158 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-10-13 21:09:44,158 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-13 21:09:44,158 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-13 21:09:44,158 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-13 21:09:44,158 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-13 21:09:44,159 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-13 21:09:44,159 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-13 21:09:44,159 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2019-10-13 21:09:44,160 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__2 [2019-10-13 21:09:44,162 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__3 [2019-10-13 21:09:44,163 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__4 [2019-10-13 21:09:44,163 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-10-13 21:09:44,163 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-10-13 21:09:44,163 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-10-13 21:09:44,164 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-10-13 21:09:44,164 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-10-13 21:09:44,164 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-10-13 21:09:44,164 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-10-13 21:09:44,165 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-10-13 21:09:44,165 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-10-13 21:09:44,165 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-10-13 21:09:44,165 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-10-13 21:09:44,165 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-10-13 21:09:44,166 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-10-13 21:09:44,166 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-10-13 21:09:44,166 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-10-13 21:09:44,166 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-10-13 21:09:44,167 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-10-13 21:09:44,167 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-10-13 21:09:44,167 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-10-13 21:09:44,167 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-10-13 21:09:44,168 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-10-13 21:09:44,168 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-10-13 21:09:44,168 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__weight [2019-10-13 21:09:44,168 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-13 21:09:44,168 INFO L138 BoogieDeclarations]: Found implementation of procedure printState__wrappee__weight [2019-10-13 21:09:44,169 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-10-13 21:09:44,169 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-10-13 21:09:44,169 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-10-13 21:09:44,169 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-10-13 21:09:44,170 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-10-13 21:09:44,170 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-10-13 21:09:44,170 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-10-13 21:09:44,170 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-13 21:09:44,170 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-13 21:09:44,170 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-13 21:09:44,171 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-13 21:09:44,171 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-13 21:09:44,171 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-10-13 21:09:44,171 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-10-13 21:09:44,171 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-10-13 21:09:44,172 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-10-13 21:09:44,172 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-10-13 21:09:44,172 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-10-13 21:09:44,172 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-10-13 21:09:44,173 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-10-13 21:09:44,173 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-13 21:09:44,173 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-10-13 21:09:44,173 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-10-13 21:09:44,173 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-10-13 21:09:44,173 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-13 21:09:44,174 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-10-13 21:09:44,174 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-13 21:09:44,174 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-13 21:09:44,174 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 21:09:44,174 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 21:09:44,175 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 21:09:44,175 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-13 21:09:44,175 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-10-13 21:09:44,175 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-10-13 21:09:44,175 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-10-13 21:09:44,176 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-10-13 21:09:44,176 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-10-13 21:09:44,176 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-10-13 21:09:44,176 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-10-13 21:09:44,176 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-10-13 21:09:44,177 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__2 [2019-10-13 21:09:44,177 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-13 21:09:44,177 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-13 21:09:44,177 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-13 21:09:44,177 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-13 21:09:44,177 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-13 21:09:44,178 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-13 21:09:44,178 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 21:09:44,178 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-13 21:09:44,178 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-13 21:09:44,178 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 21:09:44,178 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-13 21:09:44,179 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-13 21:09:44,179 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 21:09:44,179 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-13 21:09:44,179 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-13 21:09:44,180 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 21:09:44,180 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-13 21:09:44,180 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-10-13 21:09:44,180 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-10-13 21:09:44,181 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2019-10-13 21:09:44,181 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__3 [2019-10-13 21:09:44,181 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__4 [2019-10-13 21:09:44,181 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-13 21:09:44,182 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-10-13 21:09:44,182 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-10-13 21:09:44,182 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-10-13 21:09:44,182 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-13 21:09:44,182 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-10-13 21:09:44,183 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-10-13 21:09:44,183 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-10-13 21:09:44,183 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-10-13 21:09:44,183 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-10-13 21:09:44,184 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-10-13 21:09:44,184 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-10-13 21:09:44,184 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-10-13 21:09:44,184 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-10-13 21:09:44,184 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-10-13 21:09:44,185 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-10-13 21:09:44,185 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-10-13 21:09:44,185 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-10-13 21:09:44,185 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-10-13 21:09:44,185 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-10-13 21:09:44,186 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-10-13 21:09:44,186 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-10-13 21:09:44,186 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-10-13 21:09:44,186 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-10-13 21:09:44,187 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-10-13 21:09:44,187 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__weight [2019-10-13 21:09:44,187 INFO L130 BoogieDeclarations]: Found specification of procedure printState__wrappee__weight [2019-10-13 21:09:44,187 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-10-13 21:09:44,187 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-10-13 21:09:44,188 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-10-13 21:09:44,188 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-10-13 21:09:44,188 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-13 21:09:44,188 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-13 21:09:44,188 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-13 21:09:44,188 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-13 21:09:44,189 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-10-13 21:09:44,189 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-10-13 21:09:44,189 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-13 21:09:44,190 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-13 21:09:44,191 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 21:09:44,191 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-10-13 21:09:44,191 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-10-13 21:09:44,191 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-10-13 21:09:44,191 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-10-13 21:09:44,191 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-10-13 21:09:44,192 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-10-13 21:09:44,192 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-10-13 21:09:44,192 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-10-13 21:09:44,192 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-10-13 21:09:44,192 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-13 21:09:44,192 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-10-13 21:09:44,193 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-13 21:09:44,193 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-13 21:09:44,193 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 21:09:44,193 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 21:09:44,193 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-13 21:09:44,193 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 21:09:46,769 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 21:09:46,770 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-13 21:09:46,772 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:09:46 BoogieIcfgContainer [2019-10-13 21:09:46,773 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 21:09:46,774 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 21:09:46,774 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 21:09:46,778 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 21:09:46,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:09:42" (1/3) ... [2019-10-13 21:09:46,779 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a7fd674 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:09:46, skipping insertion in model container [2019-10-13 21:09:46,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:43" (2/3) ... [2019-10-13 21:09:46,780 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a7fd674 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:09:46, skipping insertion in model container [2019-10-13 21:09:46,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:09:46" (3/3) ... [2019-10-13 21:09:46,782 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product18.cil.c [2019-10-13 21:09:46,792 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 21:09:46,801 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 21:09:46,813 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 21:09:46,846 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 21:09:46,846 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 21:09:46,846 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 21:09:46,846 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 21:09:46,846 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 21:09:46,847 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 21:09:46,847 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 21:09:46,847 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 21:09:46,888 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states. [2019-10-13 21:09:46,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-10-13 21:09:46,918 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:46,919 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:46,921 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:46,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:46,926 INFO L82 PathProgramCache]: Analyzing trace with hash 126544023, now seen corresponding path program 1 times [2019-10-13 21:09:46,934 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:46,935 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042962099] [2019-10-13 21:09:46,935 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:46,935 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:46,936 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:47,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:47,598 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:09:47,599 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042962099] [2019-10-13 21:09:47,600 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115925199] [2019-10-13 21:09:47,600 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:48,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:48,401 INFO L256 TraceCheckSpWp]: Trace formula consists of 3170 conjuncts, 1 conjunts are in the unsatisfiable core [2019-10-13 21:09:48,427 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:48,474 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:09:48,474 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:48,672 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:09:48,672 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:09:48,673 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [4] total 4 [2019-10-13 21:09:48,673 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896489906] [2019-10-13 21:09:48,679 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-13 21:09:48,681 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:48,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-13 21:09:48,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:09:48,698 INFO L87 Difference]: Start difference. First operand 759 states. Second operand 2 states. [2019-10-13 21:09:48,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:48,816 INFO L93 Difference]: Finished difference Result 635 states and 1015 transitions. [2019-10-13 21:09:48,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-13 21:09:48,819 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 116 [2019-10-13 21:09:48,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:48,866 INFO L225 Difference]: With dead ends: 635 [2019-10-13 21:09:48,867 INFO L226 Difference]: Without dead ends: 598 [2019-10-13 21:09:48,872 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:09:48,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2019-10-13 21:09:48,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 598. [2019-10-13 21:09:48,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 598 states. [2019-10-13 21:09:48,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 960 transitions. [2019-10-13 21:09:48,976 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 960 transitions. Word has length 116 [2019-10-13 21:09:48,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:48,979 INFO L462 AbstractCegarLoop]: Abstraction has 598 states and 960 transitions. [2019-10-13 21:09:48,979 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-13 21:09:48,979 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 960 transitions. [2019-10-13 21:09:48,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-10-13 21:09:48,984 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:48,985 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:49,193 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:49,194 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:49,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:49,195 INFO L82 PathProgramCache]: Analyzing trace with hash 845887242, now seen corresponding path program 1 times [2019-10-13 21:09:49,195 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:49,196 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138887724] [2019-10-13 21:09:49,196 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:49,196 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:49,196 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:49,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:49,432 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:09:49,433 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138887724] [2019-10-13 21:09:49,433 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14105405] [2019-10-13 21:09:49,434 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:50,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:50,072 INFO L256 TraceCheckSpWp]: Trace formula consists of 3173 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:09:50,081 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:50,127 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:09:50,127 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:50,455 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:09:50,456 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:50,456 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:09:50,456 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917909592] [2019-10-13 21:09:50,459 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:50,459 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:50,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:50,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:09:50,460 INFO L87 Difference]: Start difference. First operand 598 states and 960 transitions. Second operand 4 states. [2019-10-13 21:09:50,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:50,606 INFO L93 Difference]: Finished difference Result 1168 states and 1893 transitions. [2019-10-13 21:09:50,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:09:50,613 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 118 [2019-10-13 21:09:50,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:50,623 INFO L225 Difference]: With dead ends: 1168 [2019-10-13 21:09:50,623 INFO L226 Difference]: Without dead ends: 598 [2019-10-13 21:09:50,633 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 232 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:09:50,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2019-10-13 21:09:50,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 598. [2019-10-13 21:09:50,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 598 states. [2019-10-13 21:09:50,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 959 transitions. [2019-10-13 21:09:50,693 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 959 transitions. Word has length 118 [2019-10-13 21:09:50,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:50,695 INFO L462 AbstractCegarLoop]: Abstraction has 598 states and 959 transitions. [2019-10-13 21:09:50,695 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:09:50,695 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 959 transitions. [2019-10-13 21:09:50,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-10-13 21:09:50,700 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:50,700 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:50,917 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:50,918 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:50,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:50,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1248298604, now seen corresponding path program 1 times [2019-10-13 21:09:50,919 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:50,919 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776529823] [2019-10-13 21:09:50,920 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:50,920 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:50,920 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:50,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:51,086 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:09:51,087 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776529823] [2019-10-13 21:09:51,087 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532017342] [2019-10-13 21:09:51,087 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:51,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:51,693 INFO L256 TraceCheckSpWp]: Trace formula consists of 3175 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:09:51,701 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:51,768 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:09:51,768 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:51,968 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:09:51,968 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:51,968 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:09:51,969 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977672366] [2019-10-13 21:09:51,969 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:51,970 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:51,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:51,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:09:51,970 INFO L87 Difference]: Start difference. First operand 598 states and 959 transitions. Second operand 4 states. [2019-10-13 21:09:52,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:52,059 INFO L93 Difference]: Finished difference Result 1168 states and 1891 transitions. [2019-10-13 21:09:52,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:09:52,060 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 120 [2019-10-13 21:09:52,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:52,066 INFO L225 Difference]: With dead ends: 1168 [2019-10-13 21:09:52,066 INFO L226 Difference]: Without dead ends: 598 [2019-10-13 21:09:52,069 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 236 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:09:52,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2019-10-13 21:09:52,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 598. [2019-10-13 21:09:52,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 598 states. [2019-10-13 21:09:52,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 958 transitions. [2019-10-13 21:09:52,095 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 958 transitions. Word has length 120 [2019-10-13 21:09:52,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:52,095 INFO L462 AbstractCegarLoop]: Abstraction has 598 states and 958 transitions. [2019-10-13 21:09:52,095 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:09:52,095 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 958 transitions. [2019-10-13 21:09:52,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-10-13 21:09:52,098 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:52,099 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:52,307 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:52,307 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:52,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:52,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1488778386, now seen corresponding path program 1 times [2019-10-13 21:09:52,308 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:52,308 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455743811] [2019-10-13 21:09:52,308 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:52,308 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:52,309 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:52,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:52,467 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:09:52,467 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455743811] [2019-10-13 21:09:52,467 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471268415] [2019-10-13 21:09:52,468 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:53,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:53,130 INFO L256 TraceCheckSpWp]: Trace formula consists of 3177 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:09:53,139 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:53,163 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:09:53,163 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:53,355 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:09:53,355 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:53,356 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:09:53,356 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163414348] [2019-10-13 21:09:53,356 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:53,357 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:53,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:53,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:09:53,358 INFO L87 Difference]: Start difference. First operand 598 states and 958 transitions. Second operand 4 states. [2019-10-13 21:09:53,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:53,439 INFO L93 Difference]: Finished difference Result 1175 states and 1898 transitions. [2019-10-13 21:09:53,439 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:09:53,439 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 122 [2019-10-13 21:09:53,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:53,444 INFO L225 Difference]: With dead ends: 1175 [2019-10-13 21:09:53,445 INFO L226 Difference]: Without dead ends: 607 [2019-10-13 21:09:53,448 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 240 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:09:53,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2019-10-13 21:09:53,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 607. [2019-10-13 21:09:53,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 607 states. [2019-10-13 21:09:53,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 970 transitions. [2019-10-13 21:09:53,473 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 970 transitions. Word has length 122 [2019-10-13 21:09:53,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:53,474 INFO L462 AbstractCegarLoop]: Abstraction has 607 states and 970 transitions. [2019-10-13 21:09:53,474 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:09:53,474 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 970 transitions. [2019-10-13 21:09:53,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-10-13 21:09:53,480 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:53,480 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:53,681 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:53,681 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:53,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:53,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1725323163, now seen corresponding path program 1 times [2019-10-13 21:09:53,683 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:53,683 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561842438] [2019-10-13 21:09:53,684 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:53,684 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:53,684 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:53,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:53,823 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:09:53,824 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561842438] [2019-10-13 21:09:53,824 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164960988] [2019-10-13 21:09:53,824 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:54,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:54,433 INFO L256 TraceCheckSpWp]: Trace formula consists of 3178 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:09:54,438 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:54,465 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:09:54,466 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:54,674 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:09:54,674 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:54,675 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:09:54,675 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126731026] [2019-10-13 21:09:54,676 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:54,676 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:54,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:54,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:09:54,677 INFO L87 Difference]: Start difference. First operand 607 states and 970 transitions. Second operand 4 states. [2019-10-13 21:09:54,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:54,760 INFO L93 Difference]: Finished difference Result 1177 states and 1899 transitions. [2019-10-13 21:09:54,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:09:54,760 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 123 [2019-10-13 21:09:54,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:54,765 INFO L225 Difference]: With dead ends: 1177 [2019-10-13 21:09:54,766 INFO L226 Difference]: Without dead ends: 607 [2019-10-13 21:09:54,768 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 242 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:09:54,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2019-10-13 21:09:54,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 607. [2019-10-13 21:09:54,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 607 states. [2019-10-13 21:09:54,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 969 transitions. [2019-10-13 21:09:54,790 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 969 transitions. Word has length 123 [2019-10-13 21:09:54,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:54,791 INFO L462 AbstractCegarLoop]: Abstraction has 607 states and 969 transitions. [2019-10-13 21:09:54,791 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:09:54,791 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 969 transitions. [2019-10-13 21:09:54,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-10-13 21:09:54,794 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:54,794 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:55,002 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:55,003 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:55,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:55,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1073190474, now seen corresponding path program 1 times [2019-10-13 21:09:55,004 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:55,004 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902619879] [2019-10-13 21:09:55,005 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:55,005 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:55,005 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:55,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:55,122 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:09:55,123 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902619879] [2019-10-13 21:09:55,123 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408066489] [2019-10-13 21:09:55,123 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:55,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:55,769 INFO L256 TraceCheckSpWp]: Trace formula consists of 3179 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:09:55,773 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:55,793 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:09:55,793 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:55,984 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:09:55,984 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:55,985 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-13 21:09:55,985 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881052140] [2019-10-13 21:09:55,985 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:55,986 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:55,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:55,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:09:55,986 INFO L87 Difference]: Start difference. First operand 607 states and 969 transitions. Second operand 4 states. [2019-10-13 21:09:56,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:56,070 INFO L93 Difference]: Finished difference Result 1177 states and 1898 transitions. [2019-10-13 21:09:56,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:09:56,071 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 124 [2019-10-13 21:09:56,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:56,076 INFO L225 Difference]: With dead ends: 1177 [2019-10-13 21:09:56,077 INFO L226 Difference]: Without dead ends: 607 [2019-10-13 21:09:56,080 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 244 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:09:56,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2019-10-13 21:09:56,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 607. [2019-10-13 21:09:56,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 607 states. [2019-10-13 21:09:56,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 968 transitions. [2019-10-13 21:09:56,104 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 968 transitions. Word has length 124 [2019-10-13 21:09:56,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:56,105 INFO L462 AbstractCegarLoop]: Abstraction has 607 states and 968 transitions. [2019-10-13 21:09:56,105 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:09:56,105 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 968 transitions. [2019-10-13 21:09:56,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-10-13 21:09:56,108 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:56,108 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:56,326 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:56,326 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:56,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:56,327 INFO L82 PathProgramCache]: Analyzing trace with hash 825732863, now seen corresponding path program 1 times [2019-10-13 21:09:56,327 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:56,327 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192358325] [2019-10-13 21:09:56,328 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:56,328 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:56,328 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:56,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:56,489 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:09:56,490 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192358325] [2019-10-13 21:09:56,490 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578176483] [2019-10-13 21:09:56,491 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 [2019-10-13 21:09:57,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:57,154 INFO L256 TraceCheckSpWp]: Trace formula consists of 3180 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:09:57,159 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:57,192 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:09:57,193 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:57,396 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:09:57,396 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:57,396 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-10-13 21:09:57,397 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624909831] [2019-10-13 21:09:57,397 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:57,398 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:57,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:57,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:09:57,398 INFO L87 Difference]: Start difference. First operand 607 states and 968 transitions. Second operand 4 states. [2019-10-13 21:09:57,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:57,584 INFO L93 Difference]: Finished difference Result 1176 states and 1898 transitions. [2019-10-13 21:09:57,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:09:57,590 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 125 [2019-10-13 21:09:57,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:57,596 INFO L225 Difference]: With dead ends: 1176 [2019-10-13 21:09:57,596 INFO L226 Difference]: Without dead ends: 607 [2019-10-13 21:09:57,603 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 248 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-10-13 21:09:57,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2019-10-13 21:09:57,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 607. [2019-10-13 21:09:57,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 607 states. [2019-10-13 21:09:57,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 963 transitions. [2019-10-13 21:09:57,628 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 963 transitions. Word has length 125 [2019-10-13 21:09:57,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:57,628 INFO L462 AbstractCegarLoop]: Abstraction has 607 states and 963 transitions. [2019-10-13 21:09:57,628 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:09:57,628 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 963 transitions. [2019-10-13 21:09:57,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-10-13 21:09:57,631 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:57,632 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:57,847 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:57,848 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:57,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:57,848 INFO L82 PathProgramCache]: Analyzing trace with hash -215123635, now seen corresponding path program 1 times [2019-10-13 21:09:57,849 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:57,849 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525835516] [2019-10-13 21:09:57,849 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:57,849 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:57,849 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:57,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:58,015 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:09:58,016 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525835516] [2019-10-13 21:09:58,016 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191962583] [2019-10-13 21:09:58,017 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 [2019-10-13 21:09:58,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:58,694 INFO L256 TraceCheckSpWp]: Trace formula consists of 3182 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:09:58,698 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:58,738 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:09:58,738 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:58,939 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:09:58,940 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:58,940 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-10-13 21:09:58,940 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410612353] [2019-10-13 21:09:58,941 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:58,941 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:58,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:58,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:09:58,942 INFO L87 Difference]: Start difference. First operand 607 states and 963 transitions. Second operand 4 states. [2019-10-13 21:09:59,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:59,112 INFO L93 Difference]: Finished difference Result 1176 states and 1888 transitions. [2019-10-13 21:09:59,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:09:59,112 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 127 [2019-10-13 21:09:59,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:59,117 INFO L225 Difference]: With dead ends: 1176 [2019-10-13 21:09:59,118 INFO L226 Difference]: Without dead ends: 607 [2019-10-13 21:09:59,121 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 252 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-10-13 21:09:59,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2019-10-13 21:09:59,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 607. [2019-10-13 21:09:59,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 607 states. [2019-10-13 21:09:59,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 958 transitions. [2019-10-13 21:09:59,146 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 958 transitions. Word has length 127 [2019-10-13 21:09:59,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:59,146 INFO L462 AbstractCegarLoop]: Abstraction has 607 states and 958 transitions. [2019-10-13 21:09:59,147 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:09:59,147 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 958 transitions. [2019-10-13 21:09:59,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-10-13 21:09:59,149 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:59,150 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:59,358 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:59,358 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:59,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:59,359 INFO L82 PathProgramCache]: Analyzing trace with hash -585805579, now seen corresponding path program 1 times [2019-10-13 21:09:59,359 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:59,359 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103381489] [2019-10-13 21:09:59,359 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:59,359 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:59,359 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:59,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:59,504 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:09:59,504 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103381489] [2019-10-13 21:09:59,505 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467792130] [2019-10-13 21:09:59,505 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 [2019-10-13 21:10:00,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:00,131 INFO L256 TraceCheckSpWp]: Trace formula consists of 3184 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:00,136 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:00,172 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:10:00,172 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:00,395 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:10:00,396 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:00,396 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-10-13 21:10:00,396 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115898204] [2019-10-13 21:10:00,397 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:00,397 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:00,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:00,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:10:00,398 INFO L87 Difference]: Start difference. First operand 607 states and 958 transitions. Second operand 4 states. [2019-10-13 21:10:00,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:00,618 INFO L93 Difference]: Finished difference Result 1212 states and 1937 transitions. [2019-10-13 21:10:00,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:10:00,619 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 129 [2019-10-13 21:10:00,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:00,624 INFO L225 Difference]: With dead ends: 1212 [2019-10-13 21:10:00,625 INFO L226 Difference]: Without dead ends: 646 [2019-10-13 21:10:00,629 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 256 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-10-13 21:10:00,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2019-10-13 21:10:00,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 646. [2019-10-13 21:10:00,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 646 states. [2019-10-13 21:10:00,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 1022 transitions. [2019-10-13 21:10:00,704 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 1022 transitions. Word has length 129 [2019-10-13 21:10:00,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:00,705 INFO L462 AbstractCegarLoop]: Abstraction has 646 states and 1022 transitions. [2019-10-13 21:10:00,705 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:00,705 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 1022 transitions. [2019-10-13 21:10:00,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-10-13 21:10:00,708 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:00,708 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:00,914 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:00,915 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:00,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:00,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1638975902, now seen corresponding path program 1 times [2019-10-13 21:10:00,916 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:00,916 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535538005] [2019-10-13 21:10:00,917 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:00,917 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:00,917 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:00,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:01,080 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:10:01,081 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535538005] [2019-10-13 21:10:01,081 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932672143] [2019-10-13 21:10:01,081 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 [2019-10-13 21:10:01,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:01,855 INFO L256 TraceCheckSpWp]: Trace formula consists of 3185 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:01,861 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:01,904 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:10:01,905 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:02,100 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:10:02,101 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:02,101 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-10-13 21:10:02,101 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193337085] [2019-10-13 21:10:02,103 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:02,103 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:02,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:02,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:10:02,104 INFO L87 Difference]: Start difference. First operand 646 states and 1022 transitions. Second operand 4 states. [2019-10-13 21:10:02,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:02,324 INFO L93 Difference]: Finished difference Result 1215 states and 1940 transitions. [2019-10-13 21:10:02,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:10:02,325 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 130 [2019-10-13 21:10:02,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:02,330 INFO L225 Difference]: With dead ends: 1215 [2019-10-13 21:10:02,330 INFO L226 Difference]: Without dead ends: 646 [2019-10-13 21:10:02,334 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 258 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-10-13 21:10:02,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2019-10-13 21:10:02,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 646. [2019-10-13 21:10:02,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 646 states. [2019-10-13 21:10:02,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 1017 transitions. [2019-10-13 21:10:02,353 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 1017 transitions. Word has length 130 [2019-10-13 21:10:02,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:02,354 INFO L462 AbstractCegarLoop]: Abstraction has 646 states and 1017 transitions. [2019-10-13 21:10:02,354 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:02,354 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 1017 transitions. [2019-10-13 21:10:02,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-10-13 21:10:02,357 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:02,357 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:02,568 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:02,569 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:02,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:02,569 INFO L82 PathProgramCache]: Analyzing trace with hash 44217569, now seen corresponding path program 1 times [2019-10-13 21:10:02,569 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:02,569 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216249836] [2019-10-13 21:10:02,569 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:02,570 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:02,570 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:02,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:02,682 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:10:02,682 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216249836] [2019-10-13 21:10:02,683 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356458236] [2019-10-13 21:10:02,683 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 [2019-10-13 21:10:03,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:03,397 INFO L256 TraceCheckSpWp]: Trace formula consists of 3181 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 21:10:03,401 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:03,490 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:10:03,490 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:03,884 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:10:03,985 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 21:10:03,985 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:03,985 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 9] total 16 [2019-10-13 21:10:03,986 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461238503] [2019-10-13 21:10:03,986 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 21:10:03,986 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:03,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 21:10:03,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2019-10-13 21:10:03,987 INFO L87 Difference]: Start difference. First operand 646 states and 1017 transitions. Second operand 9 states. [2019-10-13 21:10:04,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:04,210 INFO L93 Difference]: Finished difference Result 1228 states and 1954 transitions. [2019-10-13 21:10:04,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 21:10:04,210 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 130 [2019-10-13 21:10:04,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:04,216 INFO L225 Difference]: With dead ends: 1228 [2019-10-13 21:10:04,216 INFO L226 Difference]: Without dead ends: 662 [2019-10-13 21:10:04,220 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 245 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2019-10-13 21:10:04,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2019-10-13 21:10:04,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 655. [2019-10-13 21:10:04,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 655 states. [2019-10-13 21:10:04,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 1030 transitions. [2019-10-13 21:10:04,252 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 1030 transitions. Word has length 130 [2019-10-13 21:10:04,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:04,253 INFO L462 AbstractCegarLoop]: Abstraction has 655 states and 1030 transitions. [2019-10-13 21:10:04,253 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 21:10:04,253 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 1030 transitions. [2019-10-13 21:10:04,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-10-13 21:10:04,256 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:04,257 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:04,473 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:04,474 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:04,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:04,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1802168655, now seen corresponding path program 1 times [2019-10-13 21:10:04,475 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:04,475 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681785361] [2019-10-13 21:10:04,476 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:04,476 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:04,476 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:04,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:04,628 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:10:04,629 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681785361] [2019-10-13 21:10:04,629 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773152299] [2019-10-13 21:10:04,629 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 [2019-10-13 21:10:05,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:05,275 INFO L256 TraceCheckSpWp]: Trace formula consists of 3185 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:05,280 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:05,318 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:10:05,318 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:05,582 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:10:05,582 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:05,582 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-13 21:10:05,582 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004279063] [2019-10-13 21:10:05,583 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:05,583 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:05,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:05,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:10:05,584 INFO L87 Difference]: Start difference. First operand 655 states and 1030 transitions. Second operand 4 states. [2019-10-13 21:10:05,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:05,775 INFO L93 Difference]: Finished difference Result 1229 states and 1957 transitions. [2019-10-13 21:10:05,776 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:10:05,776 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 131 [2019-10-13 21:10:05,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:05,782 INFO L225 Difference]: With dead ends: 1229 [2019-10-13 21:10:05,783 INFO L226 Difference]: Without dead ends: 655 [2019-10-13 21:10:05,786 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 258 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:10:05,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2019-10-13 21:10:05,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 655. [2019-10-13 21:10:05,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 655 states. [2019-10-13 21:10:05,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 1025 transitions. [2019-10-13 21:10:05,815 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 1025 transitions. Word has length 131 [2019-10-13 21:10:05,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:05,815 INFO L462 AbstractCegarLoop]: Abstraction has 655 states and 1025 transitions. [2019-10-13 21:10:05,815 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:05,816 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 1025 transitions. [2019-10-13 21:10:05,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-10-13 21:10:05,819 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:05,819 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:06,030 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:06,030 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:06,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:06,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1497245732, now seen corresponding path program 1 times [2019-10-13 21:10:06,031 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:06,031 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215770287] [2019-10-13 21:10:06,031 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:06,031 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:06,031 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:06,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:06,127 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:10:06,127 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215770287] [2019-10-13 21:10:06,127 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540749203] [2019-10-13 21:10:06,127 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 [2019-10-13 21:10:06,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:06,820 INFO L256 TraceCheckSpWp]: Trace formula consists of 3186 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 21:10:06,824 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:06,876 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:10:06,876 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:07,175 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:10:07,176 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:10:07,176 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 13 [2019-10-13 21:10:07,176 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237623789] [2019-10-13 21:10:07,177 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 21:10:07,177 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:07,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 21:10:07,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2019-10-13 21:10:07,178 INFO L87 Difference]: Start difference. First operand 655 states and 1025 transitions. Second operand 11 states. [2019-10-13 21:10:07,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:07,335 INFO L93 Difference]: Finished difference Result 1166 states and 1851 transitions. [2019-10-13 21:10:07,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 21:10:07,335 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 132 [2019-10-13 21:10:07,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:07,340 INFO L225 Difference]: With dead ends: 1166 [2019-10-13 21:10:07,340 INFO L226 Difference]: Without dead ends: 672 [2019-10-13 21:10:07,343 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 255 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:10:07,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2019-10-13 21:10:07,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 662. [2019-10-13 21:10:07,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 662 states. [2019-10-13 21:10:07,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 1035 transitions. [2019-10-13 21:10:07,369 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 1035 transitions. Word has length 132 [2019-10-13 21:10:07,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:07,370 INFO L462 AbstractCegarLoop]: Abstraction has 662 states and 1035 transitions. [2019-10-13 21:10:07,370 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 21:10:07,370 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 1035 transitions. [2019-10-13 21:10:07,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-10-13 21:10:07,373 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:07,374 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:07,583 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:07,584 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:07,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:07,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1624242062, now seen corresponding path program 1 times [2019-10-13 21:10:07,585 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:07,585 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191024021] [2019-10-13 21:10:07,585 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:07,586 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:07,586 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:07,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:07,704 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:10:07,705 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191024021] [2019-10-13 21:10:07,706 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567146165] [2019-10-13 21:10:07,706 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 [2019-10-13 21:10:08,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:08,456 INFO L256 TraceCheckSpWp]: Trace formula consists of 3187 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 21:10:08,471 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:08,529 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:10:08,529 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:08,847 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:10:08,847 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:10:08,848 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 10 [2019-10-13 21:10:08,848 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396560513] [2019-10-13 21:10:08,851 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 21:10:08,851 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:08,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 21:10:08,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-10-13 21:10:08,852 INFO L87 Difference]: Start difference. First operand 662 states and 1035 transitions. Second operand 8 states. [2019-10-13 21:10:09,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:09,007 INFO L93 Difference]: Finished difference Result 1170 states and 1860 transitions. [2019-10-13 21:10:09,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:10:09,008 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 133 [2019-10-13 21:10:09,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:09,015 INFO L225 Difference]: With dead ends: 1170 [2019-10-13 21:10:09,015 INFO L226 Difference]: Without dead ends: 676 [2019-10-13 21:10:09,020 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 257 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:10:09,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2019-10-13 21:10:09,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 669. [2019-10-13 21:10:09,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 669 states. [2019-10-13 21:10:09,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 1046 transitions. [2019-10-13 21:10:09,065 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 1046 transitions. Word has length 133 [2019-10-13 21:10:09,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:09,066 INFO L462 AbstractCegarLoop]: Abstraction has 669 states and 1046 transitions. [2019-10-13 21:10:09,066 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 21:10:09,066 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 1046 transitions. [2019-10-13 21:10:09,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-10-13 21:10:09,071 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:09,071 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:09,283 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:09,283 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:09,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:09,284 INFO L82 PathProgramCache]: Analyzing trace with hash 686087154, now seen corresponding path program 1 times [2019-10-13 21:10:09,284 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:09,285 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095428021] [2019-10-13 21:10:09,285 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:09,285 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:09,285 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:09,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:09,442 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:10:09,442 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095428021] [2019-10-13 21:10:09,442 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796406690] [2019-10-13 21:10:09,443 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 [2019-10-13 21:10:10,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:10,201 INFO L256 TraceCheckSpWp]: Trace formula consists of 3183 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 21:10:10,210 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:10,287 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 21:10:10,288 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:10,609 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:10:10,767 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 21:10:10,767 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:10:10,768 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [4] total 16 [2019-10-13 21:10:10,768 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93326058] [2019-10-13 21:10:10,769 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-13 21:10:10,769 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:10,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-13 21:10:10,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2019-10-13 21:10:10,770 INFO L87 Difference]: Start difference. First operand 669 states and 1046 transitions. Second operand 14 states. [2019-10-13 21:10:11,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:11,071 INFO L93 Difference]: Finished difference Result 1171 states and 1860 transitions. [2019-10-13 21:10:11,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 21:10:11,071 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 133 [2019-10-13 21:10:11,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:11,077 INFO L225 Difference]: With dead ends: 1171 [2019-10-13 21:10:11,077 INFO L226 Difference]: Without dead ends: 677 [2019-10-13 21:10:11,162 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 252 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2019-10-13 21:10:11,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2019-10-13 21:10:11,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 669. [2019-10-13 21:10:11,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 669 states. [2019-10-13 21:10:11,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 1046 transitions. [2019-10-13 21:10:11,197 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 1046 transitions. Word has length 133 [2019-10-13 21:10:11,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:11,199 INFO L462 AbstractCegarLoop]: Abstraction has 669 states and 1046 transitions. [2019-10-13 21:10:11,199 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-13 21:10:11,199 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 1046 transitions. [2019-10-13 21:10:11,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-10-13 21:10:11,202 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:11,202 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 21:10:11,411 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:11,411 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:11,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:11,411 INFO L82 PathProgramCache]: Analyzing trace with hash 778842593, now seen corresponding path program 1 times [2019-10-13 21:10:11,412 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:11,412 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063553850] [2019-10-13 21:10:11,412 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:11,412 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:11,412 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:11,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:11,506 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:10:11,506 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063553850] [2019-10-13 21:10:11,507 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862140779] [2019-10-13 21:10:11,507 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-10-13 21:10:12,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:12,378 INFO L256 TraceCheckSpWp]: Trace formula consists of 3184 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 21:10:12,387 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:12,476 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 21:10:12,476 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:12,787 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:10:12,896 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 21:10:12,897 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:10:12,897 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [4] total 13 [2019-10-13 21:10:12,897 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952458714] [2019-10-13 21:10:12,897 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 21:10:12,898 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:12,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 21:10:12,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2019-10-13 21:10:12,898 INFO L87 Difference]: Start difference. First operand 669 states and 1046 transitions. Second operand 11 states. [2019-10-13 21:10:13,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:13,091 INFO L93 Difference]: Finished difference Result 1172 states and 1868 transitions. [2019-10-13 21:10:13,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 21:10:13,092 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 134 [2019-10-13 21:10:13,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:13,097 INFO L225 Difference]: With dead ends: 1172 [2019-10-13 21:10:13,097 INFO L226 Difference]: Without dead ends: 678 [2019-10-13 21:10:13,101 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 255 SyntacticMatches, 7 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2019-10-13 21:10:13,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2019-10-13 21:10:13,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 671. [2019-10-13 21:10:13,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 671 states. [2019-10-13 21:10:13,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 1052 transitions. [2019-10-13 21:10:13,135 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 1052 transitions. Word has length 134 [2019-10-13 21:10:13,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:13,136 INFO L462 AbstractCegarLoop]: Abstraction has 671 states and 1052 transitions. [2019-10-13 21:10:13,136 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 21:10:13,136 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 1052 transitions. [2019-10-13 21:10:13,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-10-13 21:10:13,139 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:13,139 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 21:10:13,346 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:13,346 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:13,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:13,347 INFO L82 PathProgramCache]: Analyzing trace with hash 2032492013, now seen corresponding path program 1 times [2019-10-13 21:10:13,348 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:13,348 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353589901] [2019-10-13 21:10:13,348 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:13,348 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:13,349 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:13,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:13,436 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:10:13,437 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353589901] [2019-10-13 21:10:13,437 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201228279] [2019-10-13 21:10:13,437 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 [2019-10-13 21:10:14,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:14,233 INFO L256 TraceCheckSpWp]: Trace formula consists of 3185 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 21:10:14,248 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:14,282 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-13 21:10:14,282 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:14,499 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:10:14,567 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-13 21:10:14,568 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:10:14,568 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [4] total 11 [2019-10-13 21:10:14,568 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308527903] [2019-10-13 21:10:14,568 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 21:10:14,568 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:14,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 21:10:14,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:10:14,569 INFO L87 Difference]: Start difference. First operand 671 states and 1052 transitions. Second operand 9 states. [2019-10-13 21:10:14,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:14,704 INFO L93 Difference]: Finished difference Result 1268 states and 2033 transitions. [2019-10-13 21:10:14,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:10:14,704 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 135 [2019-10-13 21:10:14,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:14,710 INFO L225 Difference]: With dead ends: 1268 [2019-10-13 21:10:14,710 INFO L226 Difference]: Without dead ends: 680 [2019-10-13 21:10:14,713 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 264 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:10:14,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2019-10-13 21:10:14,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 678. [2019-10-13 21:10:14,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 678 states. [2019-10-13 21:10:14,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 678 states to 678 states and 1060 transitions. [2019-10-13 21:10:14,736 INFO L78 Accepts]: Start accepts. Automaton has 678 states and 1060 transitions. Word has length 135 [2019-10-13 21:10:14,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:14,736 INFO L462 AbstractCegarLoop]: Abstraction has 678 states and 1060 transitions. [2019-10-13 21:10:14,737 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 21:10:14,737 INFO L276 IsEmpty]: Start isEmpty. Operand 678 states and 1060 transitions. [2019-10-13 21:10:14,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-10-13 21:10:14,740 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:14,740 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 21:10:14,948 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:14,948 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:14,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:14,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1529526242, now seen corresponding path program 1 times [2019-10-13 21:10:14,950 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:14,950 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989783086] [2019-10-13 21:10:14,950 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:14,951 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:14,951 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:14,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:15,032 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:10:15,033 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989783086] [2019-10-13 21:10:15,033 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974136395] [2019-10-13 21:10:15,033 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 [2019-10-13 21:10:15,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:15,852 INFO L256 TraceCheckSpWp]: Trace formula consists of 3186 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 21:10:15,857 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:15,899 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-13 21:10:15,899 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:16,102 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:10:16,162 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-13 21:10:16,163 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:10:16,163 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [4] total 10 [2019-10-13 21:10:16,163 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247435299] [2019-10-13 21:10:16,164 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 21:10:16,164 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:16,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 21:10:16,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-10-13 21:10:16,165 INFO L87 Difference]: Start difference. First operand 678 states and 1060 transitions. Second operand 8 states. [2019-10-13 21:10:16,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:16,289 INFO L93 Difference]: Finished difference Result 1282 states and 2044 transitions. [2019-10-13 21:10:16,290 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 21:10:16,290 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 136 [2019-10-13 21:10:16,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:16,296 INFO L225 Difference]: With dead ends: 1282 [2019-10-13 21:10:16,296 INFO L226 Difference]: Without dead ends: 687 [2019-10-13 21:10:16,299 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 266 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2019-10-13 21:10:16,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2019-10-13 21:10:16,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 682. [2019-10-13 21:10:16,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-10-13 21:10:16,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1066 transitions. [2019-10-13 21:10:16,333 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1066 transitions. Word has length 136 [2019-10-13 21:10:16,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:16,335 INFO L462 AbstractCegarLoop]: Abstraction has 682 states and 1066 transitions. [2019-10-13 21:10:16,335 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 21:10:16,335 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1066 transitions. [2019-10-13 21:10:16,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-10-13 21:10:16,339 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:16,339 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 21:10:16,549 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:16,549 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:16,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:16,549 INFO L82 PathProgramCache]: Analyzing trace with hash 61697830, now seen corresponding path program 1 times [2019-10-13 21:10:16,550 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:16,550 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403139478] [2019-10-13 21:10:16,550 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:16,550 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:16,550 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:16,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat