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_product22.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 21:09:43,688 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 21:09:43,690 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 21:09:43,703 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 21:09:43,703 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 21:09:43,704 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 21:09:43,705 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 21:09:43,707 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 21:09:43,709 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 21:09:43,710 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 21:09:43,711 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 21:09:43,712 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 21:09:43,713 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 21:09:43,714 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 21:09:43,714 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 21:09:43,716 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 21:09:43,716 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 21:09:43,717 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 21:09:43,719 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 21:09:43,721 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 21:09:43,723 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 21:09:43,724 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 21:09:43,725 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 21:09:43,726 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 21:09:43,728 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 21:09:43,728 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 21:09:43,729 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 21:09:43,730 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 21:09:43,730 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 21:09:43,731 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 21:09:43,731 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 21:09:43,732 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 21:09:43,733 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 21:09:43,734 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 21:09:43,735 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 21:09:43,735 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 21:09:43,736 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 21:09:43,736 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 21:09:43,736 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 21:09:43,737 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 21:09:43,738 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 21:09:43,738 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 21:09:43,753 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 21:09:43,753 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 21:09:43,754 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 21:09:43,754 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 21:09:43,755 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 21:09:43,755 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 21:09:43,755 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 21:09:43,755 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 21:09:43,756 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 21:09:43,756 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 21:09:43,756 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 21:09:43,756 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 21:09:43,756 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 21:09:43,757 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 21:09:43,757 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 21:09:43,757 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 21:09:43,757 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 21:09:43,757 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 21:09:43,758 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 21:09:43,758 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 21:09:43,758 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 21:09:43,758 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:09:43,759 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 21:09:43,759 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 21:09:43,759 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 21:09:43,759 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 21:09:43,759 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 21:09:43,760 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 21:09:43,760 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 21:09:44,078 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 21:09:44,092 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 21:09:44,096 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 21:09:44,098 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 21:09:44,098 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 21:09:44,099 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec1_product22.cil.c [2019-10-13 21:09:44,186 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32b2e8524/c72f682473a34b61b176e4308096c3a2/FLAGee1d12a91 [2019-10-13 21:09:44,770 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 21:09:44,771 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec1_product22.cil.c [2019-10-13 21:09:44,813 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32b2e8524/c72f682473a34b61b176e4308096c3a2/FLAGee1d12a91 [2019-10-13 21:09:45,042 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32b2e8524/c72f682473a34b61b176e4308096c3a2 [2019-10-13 21:09:45,051 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 21:09:45,052 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 21:09:45,053 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 21:09:45,053 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 21:09:45,057 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 21:09:45,058 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:09:45" (1/1) ... [2019-10-13 21:09:45,061 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24245c32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:45, skipping insertion in model container [2019-10-13 21:09:45,061 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:09:45" (1/1) ... [2019-10-13 21:09:45,069 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 21:09:45,157 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 21:09:45,855 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:09:45,871 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 21:09:46,078 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:09:46,154 INFO L192 MainTranslator]: Completed translation [2019-10-13 21:09:46,155 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:46 WrapperNode [2019-10-13 21:09:46,155 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 21:09:46,156 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 21:09:46,156 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 21:09:46,156 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 21:09:46,174 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:46" (1/1) ... [2019-10-13 21:09:46,174 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:46" (1/1) ... [2019-10-13 21:09:46,237 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:46" (1/1) ... [2019-10-13 21:09:46,238 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:46" (1/1) ... [2019-10-13 21:09:46,304 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:46" (1/1) ... [2019-10-13 21:09:46,343 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:46" (1/1) ... [2019-10-13 21:09:46,355 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:46" (1/1) ... [2019-10-13 21:09:46,390 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 21:09:46,391 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 21:09:46,392 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 21:09:46,392 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 21:09:46,393 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:46" (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 21:09:46,471 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 21:09:46,472 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 21:09:46,472 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-13 21:09:46,472 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-13 21:09:46,472 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-13 21:09:46,473 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-13 21:09:46,473 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-13 21:09:46,473 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-13 21:09:46,473 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-13 21:09:46,474 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-10-13 21:09:46,474 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-10-13 21:09:46,474 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-10-13 21:09:46,474 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-10-13 21:09:46,474 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-10-13 21:09:46,475 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-10-13 21:09:46,475 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-10-13 21:09:46,475 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-10-13 21:09:46,475 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-13 21:09:46,476 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-10-13 21:09:46,476 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-10-13 21:09:46,476 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-10-13 21:09:46,477 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-10-13 21:09:46,478 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-10-13 21:09:46,478 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-10-13 21:09:46,478 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-10-13 21:09:46,479 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-10-13 21:09:46,480 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-10-13 21:09:46,480 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-10-13 21:09:46,480 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-13 21:09:46,481 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-10-13 21:09:46,481 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-10-13 21:09:46,481 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-10-13 21:09:46,481 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-13 21:09:46,482 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-10-13 21:09:46,482 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-13 21:09:46,483 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-13 21:09:46,483 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 21:09:46,483 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-13 21:09:46,483 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-10-13 21:09:46,483 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-10-13 21:09:46,484 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-10-13 21:09:46,484 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-13 21:09:46,484 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-13 21:09:46,484 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-13 21:09:46,484 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-13 21:09:46,484 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-10-13 21:09:46,485 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-10-13 21:09:46,485 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-10-13 21:09:46,485 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-10-13 21:09:46,485 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-10-13 21:09:46,485 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-10-13 21:09:46,485 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-10-13 21:09:46,486 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-10-13 21:09:46,486 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-10-13 21:09:46,486 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-10-13 21:09:46,486 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-10-13 21:09:46,486 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-10-13 21:09:46,486 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-10-13 21:09:46,487 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-10-13 21:09:46,487 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-10-13 21:09:46,487 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-10-13 21:09:46,487 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2019-10-13 21:09:46,488 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-10-13 21:09:46,488 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-10-13 21:09:46,488 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-10-13 21:09:46,489 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__weight [2019-10-13 21:09:46,489 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-10-13 21:09:46,489 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-10-13 21:09:46,489 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-10-13 21:09:46,489 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__twothirdsfull [2019-10-13 21:09:46,490 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-13 21:09:46,490 INFO L138 BoogieDeclarations]: Found implementation of procedure printState__wrappee__twothirdsfull [2019-10-13 21:09:46,490 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-10-13 21:09:46,491 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-10-13 21:09:46,491 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2019-10-13 21:09:46,492 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__2 [2019-10-13 21:09:46,492 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__3 [2019-10-13 21:09:46,492 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__4 [2019-10-13 21:09:46,492 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 21:09:46,493 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 21:09:46,493 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-13 21:09:46,494 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-13 21:09:46,494 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-13 21:09:46,494 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-13 21:09:46,495 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-13 21:09:46,495 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-13 21:09:46,495 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 21:09:46,496 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-13 21:09:46,497 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-13 21:09:46,497 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 21:09:46,497 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-13 21:09:46,497 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-13 21:09:46,497 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 21:09:46,498 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-13 21:09:46,498 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-13 21:09:46,498 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 21:09:46,498 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-13 21:09:46,498 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-10-13 21:09:46,498 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-10-13 21:09:46,499 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-10-13 21:09:46,499 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-10-13 21:09:46,499 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-10-13 21:09:46,499 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-10-13 21:09:46,499 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-10-13 21:09:46,499 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-10-13 21:09:46,499 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__2 [2019-10-13 21:09:46,500 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-13 21:09:46,500 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-10-13 21:09:46,500 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-13 21:09:46,500 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-10-13 21:09:46,500 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-10-13 21:09:46,501 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-10-13 21:09:46,501 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-10-13 21:09:46,501 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-10-13 21:09:46,501 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-10-13 21:09:46,501 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 21:09:46,501 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-10-13 21:09:46,501 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-10-13 21:09:46,502 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-10-13 21:09:46,502 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-10-13 21:09:46,502 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-10-13 21:09:46,502 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-10-13 21:09:46,502 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-10-13 21:09:46,502 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-10-13 21:09:46,503 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-10-13 21:09:46,503 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-13 21:09:46,503 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-10-13 21:09:46,503 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-10-13 21:09:46,503 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-10-13 21:09:46,503 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-13 21:09:46,503 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-10-13 21:09:46,504 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-13 21:09:46,504 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2019-10-13 21:09:46,504 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__4 [2019-10-13 21:09:46,504 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-13 21:09:46,504 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-13 21:09:46,504 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-13 21:09:46,505 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-13 21:09:46,505 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-13 21:09:46,505 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 21:09:46,505 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-10-13 21:09:46,505 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-10-13 21:09:46,505 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-13 21:09:46,506 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-13 21:09:46,506 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-10-13 21:09:46,506 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-10-13 21:09:46,506 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-10-13 21:09:46,506 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-10-13 21:09:46,506 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-10-13 21:09:46,506 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-10-13 21:09:46,507 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-10-13 21:09:46,507 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-10-13 21:09:46,507 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-10-13 21:09:46,507 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-10-13 21:09:46,507 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-10-13 21:09:46,507 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-10-13 21:09:46,507 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-10-13 21:09:46,508 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2019-10-13 21:09:46,508 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-10-13 21:09:46,508 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-10-13 21:09:46,508 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__weight [2019-10-13 21:09:46,508 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-10-13 21:09:46,508 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-10-13 21:09:46,508 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-10-13 21:09:46,509 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__twothirdsfull [2019-10-13 21:09:46,509 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__3 [2019-10-13 21:09:46,509 INFO L130 BoogieDeclarations]: Found specification of procedure printState__wrappee__twothirdsfull [2019-10-13 21:09:46,509 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-10-13 21:09:46,509 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 21:09:46,509 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-13 21:09:46,509 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 21:09:48,871 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 21:09:48,871 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-13 21:09:48,873 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:09:48 BoogieIcfgContainer [2019-10-13 21:09:48,873 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 21:09:48,874 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 21:09:48,874 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 21:09:48,878 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 21:09:48,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:09:45" (1/3) ... [2019-10-13 21:09:48,879 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6da978d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:09:48, skipping insertion in model container [2019-10-13 21:09:48,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:46" (2/3) ... [2019-10-13 21:09:48,879 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6da978d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:09:48, skipping insertion in model container [2019-10-13 21:09:48,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:09:48" (3/3) ... [2019-10-13 21:09:48,882 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product22.cil.c [2019-10-13 21:09:48,891 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 21:09:48,901 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 21:09:48,912 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 21:09:48,953 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 21:09:48,953 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 21:09:48,953 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 21:09:48,953 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 21:09:48,954 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 21:09:48,954 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 21:09:48,954 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 21:09:48,954 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 21:09:49,004 INFO L276 IsEmpty]: Start isEmpty. Operand 790 states. [2019-10-13 21:09:49,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-10-13 21:09:49,036 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:49,038 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 21:09:49,040 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:49,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:49,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1159872126, now seen corresponding path program 1 times [2019-10-13 21:09:49,056 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:49,057 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425433796] [2019-10-13 21:09:49,057 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:49,057 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:49,057 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:49,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:49,765 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 21:09:49,766 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425433796] [2019-10-13 21:09:49,767 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590218153] [2019-10-13 21:09:49,767 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 21:09:50,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:50,453 INFO L256 TraceCheckSpWp]: Trace formula consists of 3170 conjuncts, 1 conjunts are in the unsatisfiable core [2019-10-13 21:09:50,470 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:50,504 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 21:09:50,505 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:50,696 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 21:09:50,697 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:09:50,697 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [4] total 4 [2019-10-13 21:09:50,698 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546838576] [2019-10-13 21:09:50,704 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-13 21:09:50,705 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:50,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-13 21:09:50,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:09:50,723 INFO L87 Difference]: Start difference. First operand 790 states. Second operand 2 states. [2019-10-13 21:09:50,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:50,827 INFO L93 Difference]: Finished difference Result 666 states and 1058 transitions. [2019-10-13 21:09:50,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-13 21:09:50,828 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 116 [2019-10-13 21:09:50,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:50,870 INFO L225 Difference]: With dead ends: 666 [2019-10-13 21:09:50,870 INFO L226 Difference]: Without dead ends: 629 [2019-10-13 21:09:50,877 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 21:09:50,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2019-10-13 21:09:50,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 629. [2019-10-13 21:09:50,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 629 states. [2019-10-13 21:09:50,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 1003 transitions. [2019-10-13 21:09:50,993 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 1003 transitions. Word has length 116 [2019-10-13 21:09:50,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:50,997 INFO L462 AbstractCegarLoop]: Abstraction has 629 states and 1003 transitions. [2019-10-13 21:09:50,997 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-13 21:09:50,998 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 1003 transitions. [2019-10-13 21:09:51,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-10-13 21:09:51,004 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:51,005 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 21:09:51,205 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:51,206 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:51,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:51,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1060701681, now seen corresponding path program 1 times [2019-10-13 21:09:51,207 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:51,207 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385417110] [2019-10-13 21:09:51,207 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:51,207 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:51,208 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:51,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:51,424 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 21:09:51,424 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385417110] [2019-10-13 21:09:51,425 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272634512] [2019-10-13 21:09:51,425 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 21:09:52,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:52,043 INFO L256 TraceCheckSpWp]: Trace formula consists of 3173 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:09:52,059 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:52,118 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 21:09:52,119 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:52,354 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 21:09:52,355 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:52,355 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:09:52,356 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57122491] [2019-10-13 21:09:52,357 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:52,357 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:52,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:52,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:09:52,358 INFO L87 Difference]: Start difference. First operand 629 states and 1003 transitions. Second operand 4 states. [2019-10-13 21:09:52,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:52,498 INFO L93 Difference]: Finished difference Result 1230 states and 1979 transitions. [2019-10-13 21:09:52,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:09:52,499 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 118 [2019-10-13 21:09:52,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:52,505 INFO L225 Difference]: With dead ends: 1230 [2019-10-13 21:09:52,506 INFO L226 Difference]: Without dead ends: 629 [2019-10-13 21:09:52,513 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 21:09:52,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2019-10-13 21:09:52,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 629. [2019-10-13 21:09:52,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 629 states. [2019-10-13 21:09:52,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 1002 transitions. [2019-10-13 21:09:52,629 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 1002 transitions. Word has length 118 [2019-10-13 21:09:52,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:52,630 INFO L462 AbstractCegarLoop]: Abstraction has 629 states and 1002 transitions. [2019-10-13 21:09:52,631 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:09:52,631 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 1002 transitions. [2019-10-13 21:09:52,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-10-13 21:09:52,640 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:52,640 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 21:09:52,849 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:52,850 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:52,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:52,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1607555785, now seen corresponding path program 1 times [2019-10-13 21:09:52,852 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:52,852 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541473968] [2019-10-13 21:09:52,852 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:52,852 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:52,852 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:52,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:52,998 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 21:09:52,999 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541473968] [2019-10-13 21:09:52,999 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016374854] [2019-10-13 21:09:53,000 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 21:09:53,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:53,577 INFO L256 TraceCheckSpWp]: Trace formula consists of 3175 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:09:53,584 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:53,623 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 21:09:53,623 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:53,879 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 21:09:53,880 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:53,880 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:09:53,880 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510406059] [2019-10-13 21:09:53,881 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:53,881 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:53,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:53,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:09:53,882 INFO L87 Difference]: Start difference. First operand 629 states and 1002 transitions. Second operand 4 states. [2019-10-13 21:09:53,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:53,979 INFO L93 Difference]: Finished difference Result 1230 states and 1977 transitions. [2019-10-13 21:09:53,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:09:53,979 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 120 [2019-10-13 21:09:53,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:53,985 INFO L225 Difference]: With dead ends: 1230 [2019-10-13 21:09:53,985 INFO L226 Difference]: Without dead ends: 629 [2019-10-13 21:09:53,990 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 21:09:53,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2019-10-13 21:09:54,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 629. [2019-10-13 21:09:54,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 629 states. [2019-10-13 21:09:54,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 1001 transitions. [2019-10-13 21:09:54,023 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 1001 transitions. Word has length 120 [2019-10-13 21:09:54,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:54,023 INFO L462 AbstractCegarLoop]: Abstraction has 629 states and 1001 transitions. [2019-10-13 21:09:54,023 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:09:54,024 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 1001 transitions. [2019-10-13 21:09:54,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-10-13 21:09:54,026 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:54,026 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 21:09:54,244 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:54,244 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:54,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:54,245 INFO L82 PathProgramCache]: Analyzing trace with hash -104433287, now seen corresponding path program 1 times [2019-10-13 21:09:54,245 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:54,245 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420400662] [2019-10-13 21:09:54,245 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:54,245 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:54,245 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:54,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:54,376 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 21:09:54,376 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420400662] [2019-10-13 21:09:54,377 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672130710] [2019-10-13 21:09:54,377 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 21:09:54,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:54,915 INFO L256 TraceCheckSpWp]: Trace formula consists of 3177 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:09:54,920 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:55,009 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 21:09:55,009 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:55,236 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 21:09:55,236 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:55,236 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:09:55,237 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129631029] [2019-10-13 21:09:55,238 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:55,238 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:55,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:55,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:09:55,240 INFO L87 Difference]: Start difference. First operand 629 states and 1001 transitions. Second operand 4 states. [2019-10-13 21:09:55,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:55,327 INFO L93 Difference]: Finished difference Result 1237 states and 1984 transitions. [2019-10-13 21:09:55,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:09:55,328 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 122 [2019-10-13 21:09:55,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:55,335 INFO L225 Difference]: With dead ends: 1237 [2019-10-13 21:09:55,335 INFO L226 Difference]: Without dead ends: 638 [2019-10-13 21:09:55,339 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 21:09:55,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2019-10-13 21:09:55,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 638. [2019-10-13 21:09:55,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 638 states. [2019-10-13 21:09:55,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 1013 transitions. [2019-10-13 21:09:55,373 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 1013 transitions. Word has length 122 [2019-10-13 21:09:55,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:55,373 INFO L462 AbstractCegarLoop]: Abstraction has 638 states and 1013 transitions. [2019-10-13 21:09:55,374 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:09:55,374 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 1013 transitions. [2019-10-13 21:09:55,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-10-13 21:09:55,377 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:55,377 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 21:09:55,587 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:55,587 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:55,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:55,587 INFO L82 PathProgramCache]: Analyzing trace with hash -730714916, now seen corresponding path program 1 times [2019-10-13 21:09:55,588 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:55,588 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699311878] [2019-10-13 21:09:55,588 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:55,588 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:55,588 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:55,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:55,725 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 21:09:55,726 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699311878] [2019-10-13 21:09:55,727 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072127303] [2019-10-13 21:09:55,727 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 21:09:56,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:56,307 INFO L256 TraceCheckSpWp]: Trace formula consists of 3178 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:09:56,312 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:56,347 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 21:09:56,347 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:56,647 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 21:09:56,648 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:56,648 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:09:56,648 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336033369] [2019-10-13 21:09:56,649 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:56,649 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:56,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:56,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:09:56,650 INFO L87 Difference]: Start difference. First operand 638 states and 1013 transitions. Second operand 4 states. [2019-10-13 21:09:56,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:56,758 INFO L93 Difference]: Finished difference Result 1239 states and 1985 transitions. [2019-10-13 21:09:56,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:09:56,758 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 123 [2019-10-13 21:09:56,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:56,775 INFO L225 Difference]: With dead ends: 1239 [2019-10-13 21:09:56,775 INFO L226 Difference]: Without dead ends: 638 [2019-10-13 21:09:56,779 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 21:09:56,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2019-10-13 21:09:56,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 638. [2019-10-13 21:09:56,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 638 states. [2019-10-13 21:09:56,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 1012 transitions. [2019-10-13 21:09:56,807 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 1012 transitions. Word has length 123 [2019-10-13 21:09:56,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:56,807 INFO L462 AbstractCegarLoop]: Abstraction has 638 states and 1012 transitions. [2019-10-13 21:09:56,808 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:09:56,808 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 1012 transitions. [2019-10-13 21:09:56,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-10-13 21:09:56,812 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:56,812 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 21:09:57,021 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:57,021 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:57,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:57,022 INFO L82 PathProgramCache]: Analyzing trace with hash -212076067, now seen corresponding path program 1 times [2019-10-13 21:09:57,022 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:57,022 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864598524] [2019-10-13 21:09:57,023 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:57,023 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:57,023 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:57,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:57,152 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 21:09:57,152 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864598524] [2019-10-13 21:09:57,152 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161351301] [2019-10-13 21:09:57,152 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 21:09:57,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:57,729 INFO L256 TraceCheckSpWp]: Trace formula consists of 3179 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:09:57,735 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:57,778 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 21:09:57,778 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:58,027 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 21:09:58,028 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:58,028 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-13 21:09:58,028 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014727540] [2019-10-13 21:09:58,029 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:58,029 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:58,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:58,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:09:58,031 INFO L87 Difference]: Start difference. First operand 638 states and 1012 transitions. Second operand 4 states. [2019-10-13 21:09:58,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:58,117 INFO L93 Difference]: Finished difference Result 1239 states and 1984 transitions. [2019-10-13 21:09:58,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:09:58,118 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 124 [2019-10-13 21:09:58,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:58,125 INFO L225 Difference]: With dead ends: 1239 [2019-10-13 21:09:58,125 INFO L226 Difference]: Without dead ends: 638 [2019-10-13 21:09:58,130 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 21:09:58,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2019-10-13 21:09:58,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 638. [2019-10-13 21:09:58,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 638 states. [2019-10-13 21:09:58,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 1011 transitions. [2019-10-13 21:09:58,156 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 1011 transitions. Word has length 124 [2019-10-13 21:09:58,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:58,158 INFO L462 AbstractCegarLoop]: Abstraction has 638 states and 1011 transitions. [2019-10-13 21:09:58,158 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:09:58,158 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 1011 transitions. [2019-10-13 21:09:58,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-10-13 21:09:58,161 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:58,161 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 21:09:58,371 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:58,372 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:58,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:58,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1439359232, now seen corresponding path program 1 times [2019-10-13 21:09:58,373 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:58,373 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185835455] [2019-10-13 21:09:58,373 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:58,373 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:58,373 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:58,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:58,560 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 21:09:58,560 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185835455] [2019-10-13 21:09:58,560 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826394444] [2019-10-13 21:09:58,561 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 21:09:59,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:59,184 INFO L256 TraceCheckSpWp]: Trace formula consists of 3180 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 21:09:59,195 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:59,278 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 21:09:59,279 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:59,619 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 21:09:59,620 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:59,620 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10, 7] total 16 [2019-10-13 21:09:59,620 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915391217] [2019-10-13 21:09:59,620 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 21:09:59,621 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:59,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 21:09:59,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2019-10-13 21:09:59,621 INFO L87 Difference]: Start difference. First operand 638 states and 1011 transitions. Second operand 7 states. [2019-10-13 21:09:59,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:59,787 INFO L93 Difference]: Finished difference Result 1246 states and 1993 transitions. [2019-10-13 21:09:59,788 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:09:59,788 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 125 [2019-10-13 21:09:59,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:59,794 INFO L225 Difference]: With dead ends: 1246 [2019-10-13 21:09:59,794 INFO L226 Difference]: Without dead ends: 649 [2019-10-13 21:09:59,798 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 242 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2019-10-13 21:09:59,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2019-10-13 21:09:59,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 645. [2019-10-13 21:09:59,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 645 states. [2019-10-13 21:09:59,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 1021 transitions. [2019-10-13 21:09:59,830 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 1021 transitions. Word has length 125 [2019-10-13 21:09:59,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:59,831 INFO L462 AbstractCegarLoop]: Abstraction has 645 states and 1021 transitions. [2019-10-13 21:09:59,831 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 21:09:59,831 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 1021 transitions. [2019-10-13 21:09:59,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-10-13 21:09:59,834 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:59,834 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] [2019-10-13 21:10:00,042 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:00,044 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:00,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:00,044 INFO L82 PathProgramCache]: Analyzing trace with hash 438750369, now seen corresponding path program 1 times [2019-10-13 21:10:00,045 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:00,045 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692801673] [2019-10-13 21:10:00,046 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:00,046 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:00,046 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:00,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:00,214 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 21:10:00,214 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692801673] [2019-10-13 21:10:00,215 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758313467] [2019-10-13 21:10:00,215 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 21:10:00,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:00,810 INFO L256 TraceCheckSpWp]: Trace formula consists of 3180 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 21:10:00,814 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:00,867 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 21:10:00,867 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:01,181 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 21:10:01,181 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:01,181 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4, 7] total 10 [2019-10-13 21:10:01,182 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379525597] [2019-10-13 21:10:01,185 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 21:10:01,185 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:01,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 21:10:01,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-10-13 21:10:01,186 INFO L87 Difference]: Start difference. First operand 645 states and 1021 transitions. Second operand 7 states. [2019-10-13 21:10:01,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:01,322 INFO L93 Difference]: Finished difference Result 1252 states and 2002 transitions. [2019-10-13 21:10:01,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:10:01,322 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 126 [2019-10-13 21:10:01,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:01,327 INFO L225 Difference]: With dead ends: 1252 [2019-10-13 21:10:01,328 INFO L226 Difference]: Without dead ends: 652 [2019-10-13 21:10:01,331 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 242 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 21:10:01,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2019-10-13 21:10:01,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 648. [2019-10-13 21:10:01,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 648 states. [2019-10-13 21:10:01,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 1026 transitions. [2019-10-13 21:10:01,358 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 1026 transitions. Word has length 126 [2019-10-13 21:10:01,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:01,360 INFO L462 AbstractCegarLoop]: Abstraction has 648 states and 1026 transitions. [2019-10-13 21:10:01,360 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 21:10:01,360 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 1026 transitions. [2019-10-13 21:10:01,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-10-13 21:10:01,362 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:01,362 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] [2019-10-13 21:10:01,570 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:01,570 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:01,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:01,571 INFO L82 PathProgramCache]: Analyzing trace with hash -499781246, now seen corresponding path program 1 times [2019-10-13 21:10:01,572 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:01,572 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418278549] [2019-10-13 21:10:01,572 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:01,572 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:01,572 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:01,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:01,753 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-13 21:10:01,754 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418278549] [2019-10-13 21:10:01,754 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766534490] [2019-10-13 21:10:01,754 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 21:10:02,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:02,480 INFO L256 TraceCheckSpWp]: Trace formula consists of 3181 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:02,484 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:02,515 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 21:10:02,515 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:02,706 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 21:10:02,707 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:02,707 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 10 [2019-10-13 21:10:02,707 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001434356] [2019-10-13 21:10:02,708 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:02,708 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:02,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:02,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-10-13 21:10:02,708 INFO L87 Difference]: Start difference. First operand 648 states and 1026 transitions. Second operand 4 states. [2019-10-13 21:10:02,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:02,891 INFO L93 Difference]: Finished difference Result 1257 states and 2012 transitions. [2019-10-13 21:10:02,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:10:02,892 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 126 [2019-10-13 21:10:02,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:02,896 INFO L225 Difference]: With dead ends: 1257 [2019-10-13 21:10:02,897 INFO L226 Difference]: Without dead ends: 648 [2019-10-13 21:10:02,900 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 249 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:10:02,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2019-10-13 21:10:02,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 648. [2019-10-13 21:10:02,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 648 states. [2019-10-13 21:10:02,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 1021 transitions. [2019-10-13 21:10:02,925 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 1021 transitions. Word has length 126 [2019-10-13 21:10:02,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:02,925 INFO L462 AbstractCegarLoop]: Abstraction has 648 states and 1021 transitions. [2019-10-13 21:10:02,925 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:02,925 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 1021 transitions. [2019-10-13 21:10:02,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-10-13 21:10:02,927 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:02,928 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] [2019-10-13 21:10:03,135 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:03,136 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:03,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:03,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1419215856, now seen corresponding path program 1 times [2019-10-13 21:10:03,137 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:03,137 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614830928] [2019-10-13 21:10:03,137 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:03,138 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:03,138 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:03,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:03,290 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 21:10:03,290 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614830928] [2019-10-13 21:10:03,291 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547458357] [2019-10-13 21:10:03,291 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 21:10:03,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:03,919 INFO L256 TraceCheckSpWp]: Trace formula consists of 3180 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 21:10:03,923 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:04,058 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 21:10:04,059 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:04,514 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:10:04,619 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 21:10:04,620 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:04,620 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 9] total 16 [2019-10-13 21:10:04,620 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908893226] [2019-10-13 21:10:04,621 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 21:10:04,621 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:04,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 21:10:04,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2019-10-13 21:10:04,622 INFO L87 Difference]: Start difference. First operand 648 states and 1021 transitions. Second operand 9 states. [2019-10-13 21:10:04,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:04,835 INFO L93 Difference]: Finished difference Result 1261 states and 2006 transitions. [2019-10-13 21:10:04,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 21:10:04,836 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 129 [2019-10-13 21:10:04,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:04,841 INFO L225 Difference]: With dead ends: 1261 [2019-10-13 21:10:04,841 INFO L226 Difference]: Without dead ends: 658 [2019-10-13 21:10:04,844 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 243 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2019-10-13 21:10:04,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2019-10-13 21:10:04,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 652. [2019-10-13 21:10:04,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 652 states. [2019-10-13 21:10:04,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 1027 transitions. [2019-10-13 21:10:04,869 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 1027 transitions. Word has length 129 [2019-10-13 21:10:04,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:04,869 INFO L462 AbstractCegarLoop]: Abstraction has 652 states and 1027 transitions. [2019-10-13 21:10:04,869 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 21:10:04,870 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 1027 transitions. [2019-10-13 21:10:04,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-10-13 21:10:04,872 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:04,872 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 21:10:05,088 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:05,088 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:05,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:05,089 INFO L82 PathProgramCache]: Analyzing trace with hash -140160693, now seen corresponding path program 1 times [2019-10-13 21:10:05,089 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:05,089 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230413759] [2019-10-13 21:10:05,090 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:05,090 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:05,090 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:05,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:05,186 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 21:10:05,187 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230413759] [2019-10-13 21:10:05,187 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277333639] [2019-10-13 21:10:05,187 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 21:10:05,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:05,823 INFO L256 TraceCheckSpWp]: Trace formula consists of 3181 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:05,827 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:05,851 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 21:10:05,852 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:06,019 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 21:10:06,020 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:06,020 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:10:06,020 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272551194] [2019-10-13 21:10:06,021 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:06,021 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:06,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:06,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:10:06,022 INFO L87 Difference]: Start difference. First operand 652 states and 1027 transitions. Second operand 4 states. [2019-10-13 21:10:06,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:06,180 INFO L93 Difference]: Finished difference Result 1267 states and 2018 transitions. [2019-10-13 21:10:06,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:10:06,181 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 127 [2019-10-13 21:10:06,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:06,186 INFO L225 Difference]: With dead ends: 1267 [2019-10-13 21:10:06,186 INFO L226 Difference]: Without dead ends: 652 [2019-10-13 21:10:06,189 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 250 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:10:06,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2019-10-13 21:10:06,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 652. [2019-10-13 21:10:06,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 652 states. [2019-10-13 21:10:06,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 1022 transitions. [2019-10-13 21:10:06,216 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 1022 transitions. Word has length 127 [2019-10-13 21:10:06,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:06,217 INFO L462 AbstractCegarLoop]: Abstraction has 652 states and 1022 transitions. [2019-10-13 21:10:06,217 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:06,217 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 1022 transitions. [2019-10-13 21:10:06,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-10-13 21:10:06,220 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:06,221 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 21:10:06,437 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:06,437 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:06,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:06,438 INFO L82 PathProgramCache]: Analyzing trace with hash 318446103, now seen corresponding path program 1 times [2019-10-13 21:10:06,438 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:06,438 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398201535] [2019-10-13 21:10:06,439 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:06,439 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:06,439 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:06,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:06,532 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 21:10:06,532 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398201535] [2019-10-13 21:10:06,533 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339621298] [2019-10-13 21:10:06,533 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 21:10:07,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:07,245 INFO L256 TraceCheckSpWp]: Trace formula consists of 3180 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 21:10:07,249 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:07,296 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 21:10:07,296 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:07,622 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 21:10:07,623 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:10:07,623 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 13 [2019-10-13 21:10:07,623 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728340438] [2019-10-13 21:10:07,624 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 21:10:07,624 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:07,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 21:10:07,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2019-10-13 21:10:07,625 INFO L87 Difference]: Start difference. First operand 652 states and 1022 transitions. Second operand 11 states. [2019-10-13 21:10:07,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:07,740 INFO L93 Difference]: Finished difference Result 1191 states and 1893 transitions. [2019-10-13 21:10:07,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 21:10:07,741 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 130 [2019-10-13 21:10:07,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:07,745 INFO L225 Difference]: With dead ends: 1191 [2019-10-13 21:10:07,746 INFO L226 Difference]: Without dead ends: 666 [2019-10-13 21:10:07,749 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 251 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 21:10:07,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2019-10-13 21:10:07,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 658. [2019-10-13 21:10:07,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 658 states. [2019-10-13 21:10:07,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 1033 transitions. [2019-10-13 21:10:07,773 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 1033 transitions. Word has length 130 [2019-10-13 21:10:07,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:07,773 INFO L462 AbstractCegarLoop]: Abstraction has 658 states and 1033 transitions. [2019-10-13 21:10:07,773 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 21:10:07,773 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 1033 transitions. [2019-10-13 21:10:07,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-10-13 21:10:07,776 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:07,776 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, 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 21:10:07,984 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:07,984 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:07,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:07,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1696867595, now seen corresponding path program 1 times [2019-10-13 21:10:07,985 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:07,985 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458017927] [2019-10-13 21:10:07,985 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:07,985 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:07,986 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:08,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:08,071 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:10:08,071 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458017927] [2019-10-13 21:10:08,071 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939367445] [2019-10-13 21:10:08,071 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 21:10:08,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:08,758 INFO L256 TraceCheckSpWp]: Trace formula consists of 3177 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 21:10:08,761 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:08,832 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 21:10:08,832 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:09,148 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:10:09,271 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 21:10:09,271 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:10:09,271 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [4] total 16 [2019-10-13 21:10:09,271 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195790830] [2019-10-13 21:10:09,272 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-13 21:10:09,272 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:09,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-13 21:10:09,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2019-10-13 21:10:09,273 INFO L87 Difference]: Start difference. First operand 658 states and 1033 transitions. Second operand 14 states. [2019-10-13 21:10:09,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:09,604 INFO L93 Difference]: Finished difference Result 1191 states and 1891 transitions. [2019-10-13 21:10:09,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 21:10:09,604 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 131 [2019-10-13 21:10:09,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:09,609 INFO L225 Difference]: With dead ends: 1191 [2019-10-13 21:10:09,609 INFO L226 Difference]: Without dead ends: 666 [2019-10-13 21:10:09,612 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 248 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 21:10:09,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2019-10-13 21:10:09,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 656. [2019-10-13 21:10:09,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 656 states. [2019-10-13 21:10:09,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 656 states to 656 states and 1028 transitions. [2019-10-13 21:10:09,632 INFO L78 Accepts]: Start accepts. Automaton has 656 states and 1028 transitions. Word has length 131 [2019-10-13 21:10:09,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:09,633 INFO L462 AbstractCegarLoop]: Abstraction has 656 states and 1028 transitions. [2019-10-13 21:10:09,633 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-13 21:10:09,633 INFO L276 IsEmpty]: Start isEmpty. Operand 656 states and 1028 transitions. [2019-10-13 21:10:09,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-10-13 21:10:09,635 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:09,635 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, 1, 1, 1] [2019-10-13 21:10:09,844 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:09,845 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:09,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:09,845 INFO L82 PathProgramCache]: Analyzing trace with hash 49953892, now seen corresponding path program 1 times [2019-10-13 21:10:09,845 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:09,845 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322582536] [2019-10-13 21:10:09,846 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:09,846 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:09,846 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:09,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:09,942 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:10:09,942 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322582536] [2019-10-13 21:10:09,942 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31513481] [2019-10-13 21:10:09,943 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 21:10:10,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:10,713 INFO L256 TraceCheckSpWp]: Trace formula consists of 3178 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 21:10:10,716 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:10,774 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 21:10:10,774 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:11,115 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:10:11,225 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 21:10:11,226 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:10:11,226 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [4] total 13 [2019-10-13 21:10:11,226 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887818770] [2019-10-13 21:10:11,227 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 21:10:11,227 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:11,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 21:10:11,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2019-10-13 21:10:11,228 INFO L87 Difference]: Start difference. First operand 656 states and 1028 transitions. Second operand 11 states. [2019-10-13 21:10:11,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:11,428 INFO L93 Difference]: Finished difference Result 1194 states and 1901 transitions. [2019-10-13 21:10:11,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 21:10:11,429 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 132 [2019-10-13 21:10:11,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:11,435 INFO L225 Difference]: With dead ends: 1194 [2019-10-13 21:10:11,435 INFO L226 Difference]: Without dead ends: 669 [2019-10-13 21:10:11,440 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 251 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 21:10:11,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2019-10-13 21:10:11,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 667. [2019-10-13 21:10:11,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 667 states. [2019-10-13 21:10:11,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 1051 transitions. [2019-10-13 21:10:11,485 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 1051 transitions. Word has length 132 [2019-10-13 21:10:11,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:11,485 INFO L462 AbstractCegarLoop]: Abstraction has 667 states and 1051 transitions. [2019-10-13 21:10:11,486 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 21:10:11,486 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 1051 transitions. [2019-10-13 21:10:11,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-10-13 21:10:11,488 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:11,488 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, 1, 1, 1, 1] [2019-10-13 21:10:11,697 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:11,697 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:11,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:11,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1086532538, now seen corresponding path program 1 times [2019-10-13 21:10:11,698 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:11,698 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909044519] [2019-10-13 21:10:11,698 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:11,698 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:11,698 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:11,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:11,789 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:10:11,789 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909044519] [2019-10-13 21:10:11,790 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506536663] [2019-10-13 21:10:11,790 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 21:10:12,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:12,572 INFO L256 TraceCheckSpWp]: Trace formula consists of 3179 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 21:10:12,574 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:12,610 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:10:12,611 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:12,814 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:10:12,893 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:10:12,893 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:10:12,893 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [4] total 11 [2019-10-13 21:10:12,893 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075225396] [2019-10-13 21:10:12,894 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 21:10:12,894 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:12,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 21:10:12,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:10:12,894 INFO L87 Difference]: Start difference. First operand 667 states and 1051 transitions. Second operand 9 states. [2019-10-13 21:10:13,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:13,036 INFO L93 Difference]: Finished difference Result 1298 states and 2092 transitions. [2019-10-13 21:10:13,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:10:13,037 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 133 [2019-10-13 21:10:13,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:13,043 INFO L225 Difference]: With dead ends: 1298 [2019-10-13 21:10:13,043 INFO L226 Difference]: Without dead ends: 676 [2019-10-13 21:10:13,053 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 260 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 21:10:13,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2019-10-13 21:10:13,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 674. [2019-10-13 21:10:13,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 674 states. [2019-10-13 21:10:13,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 674 states to 674 states and 1059 transitions. [2019-10-13 21:10:13,081 INFO L78 Accepts]: Start accepts. Automaton has 674 states and 1059 transitions. Word has length 133 [2019-10-13 21:10:13,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:13,084 INFO L462 AbstractCegarLoop]: Abstraction has 674 states and 1059 transitions. [2019-10-13 21:10:13,084 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 21:10:13,084 INFO L276 IsEmpty]: Start isEmpty. Operand 674 states and 1059 transitions. [2019-10-13 21:10:13,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-10-13 21:10:13,089 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:13,089 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, 1, 1] [2019-10-13 21:10:13,299 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:13,299 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:13,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:13,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1561218149, now seen corresponding path program 1 times [2019-10-13 21:10:13,300 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:13,300 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256887553] [2019-10-13 21:10:13,300 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:13,300 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:13,300 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:13,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:13,404 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:10:13,404 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256887553] [2019-10-13 21:10:13,404 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406287872] [2019-10-13 21:10:13,405 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 21:10:14,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:14,138 INFO L256 TraceCheckSpWp]: Trace formula consists of 3180 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 21:10:14,142 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:14,187 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:10:14,187 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:14,387 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:10:14,446 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:10:14,447 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:10:14,447 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [4] total 10 [2019-10-13 21:10:14,447 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732997462] [2019-10-13 21:10:14,448 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 21:10:14,448 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:14,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 21:10:14,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-10-13 21:10:14,448 INFO L87 Difference]: Start difference. First operand 674 states and 1059 transitions. Second operand 8 states. [2019-10-13 21:10:14,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:14,582 INFO L93 Difference]: Finished difference Result 1312 states and 2100 transitions. [2019-10-13 21:10:14,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 21:10:14,582 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 134 [2019-10-13 21:10:14,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:14,586 INFO L225 Difference]: With dead ends: 1312 [2019-10-13 21:10:14,587 INFO L226 Difference]: Without dead ends: 683 [2019-10-13 21:10:14,589 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 262 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 21:10:14,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2019-10-13 21:10:14,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 678. [2019-10-13 21:10:14,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 678 states. [2019-10-13 21:10:14,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 678 states to 678 states and 1065 transitions. [2019-10-13 21:10:14,614 INFO L78 Accepts]: Start accepts. Automaton has 678 states and 1065 transitions. Word has length 134 [2019-10-13 21:10:14,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:14,615 INFO L462 AbstractCegarLoop]: Abstraction has 678 states and 1065 transitions. [2019-10-13 21:10:14,615 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 21:10:14,615 INFO L276 IsEmpty]: Start isEmpty. Operand 678 states and 1065 transitions. [2019-10-13 21:10:14,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-10-13 21:10:14,617 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:14,617 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, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:14,825 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:14,825 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:14,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:14,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1044824767, now seen corresponding path program 1 times [2019-10-13 21:10:14,826 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:14,826 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600496958] [2019-10-13 21:10:14,826 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:14,826 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:14,827 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:14,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:14,907 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:10:14,908 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600496958] [2019-10-13 21:10:14,908 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397871656] [2019-10-13 21:10:14,908 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 21:10:15,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:15,755 INFO L256 TraceCheckSpWp]: Trace formula consists of 3178 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-13 21:10:15,758 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:15,841 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-13 21:10:15,841 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:16,420 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:10:16,465 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:10:16,593 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-13 21:10:16,593 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:10:16,594 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [11, 11] imperfect sequences [4] total 19 [2019-10-13 21:10:16,594 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435399891] [2019-10-13 21:10:16,594 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-13 21:10:16,594 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:16,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-13 21:10:16,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2019-10-13 21:10:16,595 INFO L87 Difference]: Start difference. First operand 678 states and 1065 transitions. Second operand 17 states. [2019-10-13 21:10:17,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:17,007 INFO L93 Difference]: Finished difference Result 1224 states and 1948 transitions. [2019-10-13 21:10:17,007 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-13 21:10:17,008 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 135 [2019-10-13 21:10:17,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:17,012 INFO L225 Difference]: With dead ends: 1224 [2019-10-13 21:10:17,013 INFO L226 Difference]: Without dead ends: 699 [2019-10-13 21:10:17,016 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 252 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2019-10-13 21:10:17,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2019-10-13 21:10:17,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 687. [2019-10-13 21:10:17,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 687 states. [2019-10-13 21:10:17,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 1080 transitions. [2019-10-13 21:10:17,045 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 1080 transitions. Word has length 135 [2019-10-13 21:10:17,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:17,046 INFO L462 AbstractCegarLoop]: Abstraction has 687 states and 1080 transitions. [2019-10-13 21:10:17,046 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-13 21:10:17,046 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 1080 transitions. [2019-10-13 21:10:17,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-10-13 21:10:17,050 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:17,050 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] [2019-10-13 21:10:17,261 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:17,261 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:17,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:17,262 INFO L82 PathProgramCache]: Analyzing trace with hash -136444597, now seen corresponding path program 1 times [2019-10-13 21:10:17,262 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:17,262 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35791201] [2019-10-13 21:10:17,262 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:17,262 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:17,263 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:17,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:17,346 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 21:10:17,347 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35791201] [2019-10-13 21:10:17,347 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346383789] [2019-10-13 21:10:17,347 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 21:10:18,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:18,098 INFO L256 TraceCheckSpWp]: Trace formula consists of 3184 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:18,101 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:18,121 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 21:10:18,122 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:18,299 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 21:10:18,300 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:18,300 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:10:18,300 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845563097] [2019-10-13 21:10:18,300 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:18,301 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:18,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:18,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:10:18,301 INFO L87 Difference]: Start difference. First operand 687 states and 1080 transitions. Second operand 4 states. [2019-10-13 21:10:18,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:18,500 INFO L93 Difference]: Finished difference Result 1385 states and 2196 transitions. [2019-10-13 21:10:18,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:10:18,505 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 134 [2019-10-13 21:10:18,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:18,510 INFO L225 Difference]: With dead ends: 1385 [2019-10-13 21:10:18,510 INFO L226 Difference]: Without dead ends: 741 [2019-10-13 21:10:18,513 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 264 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:10:18,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2019-10-13 21:10:18,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 721. [2019-10-13 21:10:18,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 721 states. [2019-10-13 21:10:18,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 1134 transitions. [2019-10-13 21:10:18,539 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 1134 transitions. Word has length 134 [2019-10-13 21:10:18,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:18,539 INFO L462 AbstractCegarLoop]: Abstraction has 721 states and 1134 transitions. [2019-10-13 21:10:18,539 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:18,539 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 1134 transitions. [2019-10-13 21:10:18,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-10-13 21:10:18,542 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:18,543 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] [2019-10-13 21:10:18,751 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:18,751 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:18,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:18,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1420663498, now seen corresponding path program 1 times [2019-10-13 21:10:18,752 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:18,752 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913960725] [2019-10-13 21:10:18,752 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:18,752 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:18,752 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:18,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:18,832 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 21:10:18,832 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913960725] [2019-10-13 21:10:18,832 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79680812] [2019-10-13 21:10:18,834 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:19,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:19,651 INFO L256 TraceCheckSpWp]: Trace formula consists of 3185 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:19,654 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:19,679 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 21:10:19,680 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:19,850 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 21:10:19,850 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:19,850 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:10:19,850 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249932982] [2019-10-13 21:10:19,851 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:19,851 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:19,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:19,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:10:19,852 INFO L87 Difference]: Start difference. First operand 721 states and 1134 transitions. Second operand 4 states. [2019-10-13 21:10:20,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:20,043 INFO L93 Difference]: Finished difference Result 1358 states and 2152 transitions. [2019-10-13 21:10:20,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:10:20,046 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 135 [2019-10-13 21:10:20,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:20,051 INFO L225 Difference]: With dead ends: 1358 [2019-10-13 21:10:20,051 INFO L226 Difference]: Without dead ends: 721 [2019-10-13 21:10:20,054 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 266 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:10:20,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2019-10-13 21:10:20,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 721. [2019-10-13 21:10:20,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 721 states. [2019-10-13 21:10:20,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 1129 transitions. [2019-10-13 21:10:20,078 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 1129 transitions. Word has length 135 [2019-10-13 21:10:20,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:20,079 INFO L462 AbstractCegarLoop]: Abstraction has 721 states and 1129 transitions. [2019-10-13 21:10:20,079 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:20,079 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 1129 transitions. [2019-10-13 21:10:20,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-10-13 21:10:20,082 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:20,082 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 21:10:20,290 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:20,290 INFO L410 AbstractCegarLoop]: === Iteration 20 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:20,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:20,290 INFO L82 PathProgramCache]: Analyzing trace with hash 519540272, now seen corresponding path program 1 times [2019-10-13 21:10:20,291 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:20,291 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144227644] [2019-10-13 21:10:20,291 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:20,292 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:20,292 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:20,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:20,372 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 21:10:20,373 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144227644] [2019-10-13 21:10:20,373 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661433880] [2019-10-13 21:10:20,373 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true