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_product26.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:08:49,999 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:08:50,001 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:08:50,017 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:08:50,017 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:08:50,020 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:08:50,021 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:08:50,032 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:08:50,036 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:08:50,041 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:08:50,042 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:08:50,044 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:08:50,044 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:08:50,046 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:08:50,049 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:08:50,050 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:08:50,052 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:08:50,053 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:08:50,055 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:08:50,060 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:08:50,064 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:08:50,067 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:08:50,070 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:08:50,071 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:08:50,073 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 01:08:50,074 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 01:08:50,074 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 01:08:50,076 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 01:08:50,077 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 01:08:50,078 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 01:08:50,078 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 01:08:50,080 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 01:08:50,081 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 01:08:50,082 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 01:08:50,084 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 01:08:50,084 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 01:08:50,085 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 01:08:50,085 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 01:08:50,085 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:08:50,086 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:08:50,087 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:08:50,088 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 [2019-10-15 01:08:50,121 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:08:50,122 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:08:50,123 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:08:50,123 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:08:50,123 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:08:50,123 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:08:50,124 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:08:50,124 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:08:50,124 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:08:50,124 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:08:50,124 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:08:50,125 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:08:50,125 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:08:50,125 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:08:50,125 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:08:50,125 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:08:50,125 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:08:50,126 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:08:50,126 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:08:50,126 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:08:50,126 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:08:50,126 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:08:50,127 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:08:50,127 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:08:50,127 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:08:50,127 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:08:50,127 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:08:50,128 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:08:50,128 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 [2019-10-15 01:08:50,403 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:08:50,417 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:08:50,421 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:08:50,423 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:08:50,423 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:08:50,424 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec1_product26.cil.c [2019-10-15 01:08:50,489 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab696872e/c340fa7d894a49f0acd2b27a0ea8141f/FLAG05b0c082e [2019-10-15 01:08:51,158 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:08:51,160 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec1_product26.cil.c [2019-10-15 01:08:51,183 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab696872e/c340fa7d894a49f0acd2b27a0ea8141f/FLAG05b0c082e [2019-10-15 01:08:51,329 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab696872e/c340fa7d894a49f0acd2b27a0ea8141f [2019-10-15 01:08:51,341 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:08:51,343 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:08:51,347 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:08:51,347 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:08:51,351 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:08:51,352 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:08:51" (1/1) ... [2019-10-15 01:08:51,355 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@338e2a78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:51, skipping insertion in model container [2019-10-15 01:08:51,355 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:08:51" (1/1) ... [2019-10-15 01:08:51,362 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:08:51,430 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:08:52,195 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:08:52,212 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:08:52,345 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:08:52,415 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:08:52,416 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:52 WrapperNode [2019-10-15 01:08:52,416 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:08:52,417 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:08:52,417 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:08:52,417 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:08:52,432 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:52" (1/1) ... [2019-10-15 01:08:52,433 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:52" (1/1) ... [2019-10-15 01:08:52,477 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:52" (1/1) ... [2019-10-15 01:08:52,477 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:52" (1/1) ... [2019-10-15 01:08:52,539 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:52" (1/1) ... [2019-10-15 01:08:52,574 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:52" (1/1) ... [2019-10-15 01:08:52,585 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:52" (1/1) ... [2019-10-15 01:08:52,601 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:08:52,602 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:08:52,602 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:08:52,602 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:08:52,603 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:52" (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 [2019-10-15 01:08:52,690 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:08:52,691 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:08:52,691 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-15 01:08:52,691 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-15 01:08:52,691 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-10-15 01:08:52,692 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-10-15 01:08:52,693 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-10-15 01:08:52,693 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-10-15 01:08:52,694 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-10-15 01:08:52,694 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-10-15 01:08:52,695 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__weight [2019-10-15 01:08:52,695 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-10-15 01:08:52,695 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-10-15 01:08:52,697 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-10-15 01:08:52,697 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-10-15 01:08:52,697 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-10-15 01:08:52,701 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-10-15 01:08:52,701 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-10-15 01:08:52,701 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-10-15 01:08:52,702 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-10-15 01:08:52,702 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-10-15 01:08:52,702 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-10-15 01:08:52,702 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-10-15 01:08:52,703 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-10-15 01:08:52,703 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-10-15 01:08:52,703 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-10-15 01:08:52,703 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-10-15 01:08:52,704 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__empty [2019-10-15 01:08:52,704 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-15 01:08:52,704 INFO L138 BoogieDeclarations]: Found implementation of procedure printState__wrappee__empty [2019-10-15 01:08:52,704 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-10-15 01:08:52,704 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-10-15 01:08:52,705 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-15 01:08:52,705 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-15 01:08:52,705 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-15 01:08:52,705 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-15 01:08:52,706 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-15 01:08:52,706 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-15 01:08:52,706 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-15 01:08:52,706 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-15 01:08:52,707 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-15 01:08:52,707 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-15 01:08:52,707 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-10-15 01:08:52,707 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-10-15 01:08:52,708 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-10-15 01:08:52,708 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-10-15 01:08:52,708 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-10-15 01:08:52,709 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2019-10-15 01:08:52,710 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__2 [2019-10-15 01:08:52,710 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__3 [2019-10-15 01:08:52,710 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__4 [2019-10-15 01:08:52,711 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-10-15 01:08:52,711 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-10-15 01:08:52,711 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-10-15 01:08:52,711 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-10-15 01:08:52,711 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-10-15 01:08:52,712 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-10-15 01:08:52,712 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-10-15 01:08:52,712 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-10-15 01:08:52,712 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-15 01:08:52,713 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-10-15 01:08:52,713 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-10-15 01:08:52,713 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-10-15 01:08:52,714 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-15 01:08:52,714 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-10-15 01:08:52,714 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-15 01:08:52,714 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-15 01:08:52,714 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:08:52,714 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-15 01:08:52,715 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-10-15 01:08:52,715 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-10-15 01:08:52,715 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-10-15 01:08:52,715 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-10-15 01:08:52,716 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-10-15 01:08:52,716 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-10-15 01:08:52,717 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-10-15 01:08:52,717 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-10-15 01:08:52,717 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:08:52,717 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:08:52,718 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-10-15 01:08:52,718 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-10-15 01:08:52,718 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-15 01:08:52,719 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-15 01:08:52,720 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-15 01:08:52,720 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-10-15 01:08:52,721 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-10-15 01:08:52,721 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-10-15 01:08:52,721 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-10-15 01:08:52,721 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-10-15 01:08:52,721 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-10-15 01:08:52,722 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-10-15 01:08:52,722 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-10-15 01:08:52,722 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-10-15 01:08:52,722 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-15 01:08:52,722 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-10-15 01:08:52,722 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-10-15 01:08:52,723 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-10-15 01:08:52,723 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-10-15 01:08:52,723 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-10-15 01:08:52,723 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-10-15 01:08:52,723 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-10-15 01:08:52,724 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-10-15 01:08:52,724 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-10-15 01:08:52,724 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-10-15 01:08:52,724 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-10-15 01:08:52,724 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-10-15 01:08:52,724 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__weight [2019-10-15 01:08:52,725 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-10-15 01:08:52,725 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-10-15 01:08:52,725 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-10-15 01:08:52,725 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-10-15 01:08:52,725 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-10-15 01:08:52,725 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-10-15 01:08:52,726 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-10-15 01:08:52,726 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-10-15 01:08:52,726 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-10-15 01:08:52,726 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-10-15 01:08:52,727 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__empty [2019-10-15 01:08:52,727 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__3 [2019-10-15 01:08:52,728 INFO L130 BoogieDeclarations]: Found specification of procedure printState__wrappee__empty [2019-10-15 01:08:52,728 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:08:52,729 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-10-15 01:08:52,729 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-15 01:08:52,729 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-15 01:08:52,730 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-15 01:08:52,731 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-15 01:08:52,731 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-15 01:08:52,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-15 01:08:52,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:08:52,732 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-15 01:08:52,732 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-15 01:08:52,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:08:52,733 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-15 01:08:52,733 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-15 01:08:52,733 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:08:52,734 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-15 01:08:52,735 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-15 01:08:52,738 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-15 01:08:52,739 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-15 01:08:52,739 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-15 01:08:52,739 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-15 01:08:52,739 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-15 01:08:52,739 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-10-15 01:08:52,739 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-10-15 01:08:52,740 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-10-15 01:08:52,740 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-10-15 01:08:52,740 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-15 01:08:52,740 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2019-10-15 01:08:52,740 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__2 [2019-10-15 01:08:52,741 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__4 [2019-10-15 01:08:52,741 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:08:52,741 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-10-15 01:08:52,741 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-10-15 01:08:52,743 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-10-15 01:08:52,744 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-10-15 01:08:52,744 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-10-15 01:08:52,744 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-10-15 01:08:52,744 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-10-15 01:08:52,745 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-10-15 01:08:52,745 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-10-15 01:08:52,745 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-15 01:08:52,745 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-10-15 01:08:52,746 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-15 01:08:52,746 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-15 01:08:52,746 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:08:52,747 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-10-15 01:08:52,747 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:08:52,747 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-15 01:08:52,747 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:08:55,438 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:08:55,439 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-15 01:08:55,441 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:08:55 BoogieIcfgContainer [2019-10-15 01:08:55,441 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:08:55,443 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:08:55,443 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:08:55,446 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:08:55,447 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:08:51" (1/3) ... [2019-10-15 01:08:55,447 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39e69291 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:08:55, skipping insertion in model container [2019-10-15 01:08:55,448 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:52" (2/3) ... [2019-10-15 01:08:55,448 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39e69291 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:08:55, skipping insertion in model container [2019-10-15 01:08:55,449 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:08:55" (3/3) ... [2019-10-15 01:08:55,451 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product26.cil.c [2019-10-15 01:08:55,461 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:08:55,474 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:08:55,486 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:08:55,541 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:08:55,542 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:08:55,542 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:08:55,542 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:08:55,542 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:08:55,542 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:08:55,542 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:08:55,543 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:08:55,581 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states. [2019-10-15 01:08:55,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-10-15 01:08:55,602 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:55,604 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] [2019-10-15 01:08:55,606 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:55,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:55,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1704372100, now seen corresponding path program 1 times [2019-10-15 01:08:55,623 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:55,623 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332164631] [2019-10-15 01:08:55,624 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:55,624 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:55,624 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:55,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:56,228 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:08:56,229 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332164631] [2019-10-15 01:08:56,230 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202634172] [2019-10-15 01:08:56,230 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 [2019-10-15 01:08:56,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:56,968 INFO L256 TraceCheckSpWp]: Trace formula consists of 3170 conjuncts, 1 conjunts are in the unsatisfiable core [2019-10-15 01:08:56,995 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:57,031 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:08:57,031 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:57,214 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:08:57,215 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:08:57,215 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [4] total 4 [2019-10-15 01:08:57,215 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277685067] [2019-10-15 01:08:57,221 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-15 01:08:57,223 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:57,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-15 01:08:57,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:08:57,240 INFO L87 Difference]: Start difference. First operand 775 states. Second operand 2 states. [2019-10-15 01:08:57,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:57,353 INFO L93 Difference]: Finished difference Result 651 states and 1038 transitions. [2019-10-15 01:08:57,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-15 01:08:57,356 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 116 [2019-10-15 01:08:57,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:57,393 INFO L225 Difference]: With dead ends: 651 [2019-10-15 01:08:57,394 INFO L226 Difference]: Without dead ends: 614 [2019-10-15 01:08:57,399 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 [2019-10-15 01:08:57,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2019-10-15 01:08:57,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 614. [2019-10-15 01:08:57,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 614 states. [2019-10-15 01:08:57,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 983 transitions. [2019-10-15 01:08:57,521 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 983 transitions. Word has length 116 [2019-10-15 01:08:57,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:57,524 INFO L462 AbstractCegarLoop]: Abstraction has 614 states and 983 transitions. [2019-10-15 01:08:57,524 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-15 01:08:57,524 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 983 transitions. [2019-10-15 01:08:57,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-10-15 01:08:57,531 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:57,531 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] [2019-10-15 01:08:57,744 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:57,744 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:57,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:57,745 INFO L82 PathProgramCache]: Analyzing trace with hash 2086080695, now seen corresponding path program 1 times [2019-10-15 01:08:57,745 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:57,745 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652890609] [2019-10-15 01:08:57,745 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:57,746 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:57,746 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:57,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:58,020 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:08:58,021 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652890609] [2019-10-15 01:08:58,021 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414175351] [2019-10-15 01:08:58,022 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 [2019-10-15 01:08:58,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:58,656 INFO L256 TraceCheckSpWp]: Trace formula consists of 3173 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:08:58,664 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:58,715 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:08:58,715 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:59,053 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:08:59,054 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:08:59,054 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-15 01:08:59,054 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645935395] [2019-10-15 01:08:59,056 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:08:59,056 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:59,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:08:59,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:08:59,057 INFO L87 Difference]: Start difference. First operand 614 states and 983 transitions. Second operand 4 states. [2019-10-15 01:08:59,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:59,159 INFO L93 Difference]: Finished difference Result 1200 states and 1939 transitions. [2019-10-15 01:08:59,160 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:08:59,160 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 118 [2019-10-15 01:08:59,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:59,172 INFO L225 Difference]: With dead ends: 1200 [2019-10-15 01:08:59,172 INFO L226 Difference]: Without dead ends: 614 [2019-10-15 01:08:59,181 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 [2019-10-15 01:08:59,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2019-10-15 01:08:59,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 614. [2019-10-15 01:08:59,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 614 states. [2019-10-15 01:08:59,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 982 transitions. [2019-10-15 01:08:59,248 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 982 transitions. Word has length 118 [2019-10-15 01:08:59,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:59,249 INFO L462 AbstractCegarLoop]: Abstraction has 614 states and 982 transitions. [2019-10-15 01:08:59,250 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:08:59,250 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 982 transitions. [2019-10-15 01:08:59,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-10-15 01:08:59,262 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:59,262 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] [2019-10-15 01:08:59,472 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:59,472 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:59,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:59,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1224648271, now seen corresponding path program 1 times [2019-10-15 01:08:59,473 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:59,473 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143177088] [2019-10-15 01:08:59,474 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:59,474 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:59,474 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:59,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:59,746 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:08:59,748 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143177088] [2019-10-15 01:08:59,748 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191156851] [2019-10-15 01:08:59,748 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 [2019-10-15 01:09:00,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:00,357 INFO L256 TraceCheckSpWp]: Trace formula consists of 3175 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:00,363 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:00,403 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:09:00,403 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:00,568 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:09:00,569 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:00,569 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-15 01:09:00,569 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953157632] [2019-10-15 01:09:00,570 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:00,570 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:00,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:00,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:09:00,571 INFO L87 Difference]: Start difference. First operand 614 states and 982 transitions. Second operand 4 states. [2019-10-15 01:09:00,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:00,661 INFO L93 Difference]: Finished difference Result 1200 states and 1937 transitions. [2019-10-15 01:09:00,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:09:00,661 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 120 [2019-10-15 01:09:00,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:00,667 INFO L225 Difference]: With dead ends: 1200 [2019-10-15 01:09:00,668 INFO L226 Difference]: Without dead ends: 614 [2019-10-15 01:09:00,671 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 [2019-10-15 01:09:00,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2019-10-15 01:09:00,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 614. [2019-10-15 01:09:00,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 614 states. [2019-10-15 01:09:00,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 981 transitions. [2019-10-15 01:09:00,698 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 981 transitions. Word has length 120 [2019-10-15 01:09:00,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:00,698 INFO L462 AbstractCegarLoop]: Abstraction has 614 states and 981 transitions. [2019-10-15 01:09:00,698 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:00,698 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 981 transitions. [2019-10-15 01:09:00,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-10-15 01:09:00,701 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:00,701 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] [2019-10-15 01:09:00,910 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:00,910 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:00,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:00,911 INFO L82 PathProgramCache]: Analyzing trace with hash -2135037313, now seen corresponding path program 1 times [2019-10-15 01:09:00,911 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:00,912 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781701473] [2019-10-15 01:09:00,912 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:00,913 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:00,913 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:00,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:01,050 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:09:01,050 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781701473] [2019-10-15 01:09:01,051 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281668507] [2019-10-15 01:09:01,051 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 [2019-10-15 01:09:01,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:01,684 INFO L256 TraceCheckSpWp]: Trace formula consists of 3177 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:01,690 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:01,717 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:09:01,718 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:01,933 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:09:01,933 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:01,934 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-15 01:09:01,934 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657607810] [2019-10-15 01:09:01,935 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:01,935 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:01,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:01,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:09:01,936 INFO L87 Difference]: Start difference. First operand 614 states and 981 transitions. Second operand 4 states. [2019-10-15 01:09:02,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:02,026 INFO L93 Difference]: Finished difference Result 1207 states and 1944 transitions. [2019-10-15 01:09:02,027 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:09:02,027 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 122 [2019-10-15 01:09:02,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:02,032 INFO L225 Difference]: With dead ends: 1207 [2019-10-15 01:09:02,033 INFO L226 Difference]: Without dead ends: 623 [2019-10-15 01:09:02,036 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 [2019-10-15 01:09:02,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2019-10-15 01:09:02,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 623. [2019-10-15 01:09:02,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 623 states. [2019-10-15 01:09:02,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 993 transitions. [2019-10-15 01:09:02,063 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 993 transitions. Word has length 122 [2019-10-15 01:09:02,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:02,065 INFO L462 AbstractCegarLoop]: Abstraction has 623 states and 993 transitions. [2019-10-15 01:09:02,065 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:02,066 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 993 transitions. [2019-10-15 01:09:02,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-10-15 01:09:02,069 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:02,069 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] [2019-10-15 01:09:02,280 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:02,281 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:02,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:02,281 INFO L82 PathProgramCache]: Analyzing trace with hash 2064176466, now seen corresponding path program 1 times [2019-10-15 01:09:02,281 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:02,282 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256743140] [2019-10-15 01:09:02,282 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:02,282 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:02,283 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:02,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:02,414 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:09:02,415 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256743140] [2019-10-15 01:09:02,415 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604269609] [2019-10-15 01:09:02,415 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 [2019-10-15 01:09:03,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:03,098 INFO L256 TraceCheckSpWp]: Trace formula consists of 3178 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:03,105 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:03,136 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:09:03,137 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:03,337 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:09:03,337 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:03,338 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-15 01:09:03,339 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641138404] [2019-10-15 01:09:03,340 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:03,340 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:03,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:03,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:09:03,341 INFO L87 Difference]: Start difference. First operand 623 states and 993 transitions. Second operand 4 states. [2019-10-15 01:09:03,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:03,423 INFO L93 Difference]: Finished difference Result 1209 states and 1945 transitions. [2019-10-15 01:09:03,424 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:09:03,424 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 123 [2019-10-15 01:09:03,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:03,430 INFO L225 Difference]: With dead ends: 1209 [2019-10-15 01:09:03,430 INFO L226 Difference]: Without dead ends: 623 [2019-10-15 01:09:03,436 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 [2019-10-15 01:09:03,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2019-10-15 01:09:03,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 623. [2019-10-15 01:09:03,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 623 states. [2019-10-15 01:09:03,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 992 transitions. [2019-10-15 01:09:03,462 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 992 transitions. Word has length 123 [2019-10-15 01:09:03,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:03,463 INFO L462 AbstractCegarLoop]: Abstraction has 623 states and 992 transitions. [2019-10-15 01:09:03,463 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:03,463 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 992 transitions. [2019-10-15 01:09:03,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-10-15 01:09:03,468 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:03,468 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] [2019-10-15 01:09:03,676 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:03,677 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:03,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:03,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1849317603, now seen corresponding path program 1 times [2019-10-15 01:09:03,678 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:03,678 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973185189] [2019-10-15 01:09:03,679 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:03,679 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:03,680 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:03,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:03,782 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:09:03,783 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973185189] [2019-10-15 01:09:03,783 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749728217] [2019-10-15 01:09:03,783 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 [2019-10-15 01:09:04,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:04,387 INFO L256 TraceCheckSpWp]: Trace formula consists of 3179 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:04,392 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:04,416 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:09:04,417 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:04,636 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:09:04,636 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:04,637 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-15 01:09:04,637 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297130670] [2019-10-15 01:09:04,637 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:04,638 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:04,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:04,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:09:04,639 INFO L87 Difference]: Start difference. First operand 623 states and 992 transitions. Second operand 4 states. [2019-10-15 01:09:04,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:04,719 INFO L93 Difference]: Finished difference Result 1209 states and 1944 transitions. [2019-10-15 01:09:04,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:09:04,720 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 124 [2019-10-15 01:09:04,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:04,725 INFO L225 Difference]: With dead ends: 1209 [2019-10-15 01:09:04,726 INFO L226 Difference]: Without dead ends: 623 [2019-10-15 01:09:04,729 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 [2019-10-15 01:09:04,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2019-10-15 01:09:04,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 623. [2019-10-15 01:09:04,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 623 states. [2019-10-15 01:09:04,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 991 transitions. [2019-10-15 01:09:04,751 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 991 transitions. Word has length 124 [2019-10-15 01:09:04,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:04,752 INFO L462 AbstractCegarLoop]: Abstraction has 623 states and 991 transitions. [2019-10-15 01:09:04,752 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:04,752 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 991 transitions. [2019-10-15 01:09:04,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-10-15 01:09:04,755 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:04,755 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] [2019-10-15 01:09:04,962 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:04,963 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:04,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:04,964 INFO L82 PathProgramCache]: Analyzing trace with hash -2057806986, now seen corresponding path program 1 times [2019-10-15 01:09:04,964 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:04,965 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442783721] [2019-10-15 01:09:04,965 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:04,965 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:04,966 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:05,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:05,137 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 01:09:05,137 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442783721] [2019-10-15 01:09:05,137 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115747737] [2019-10-15 01:09:05,138 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 [2019-10-15 01:09:05,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:05,828 INFO L256 TraceCheckSpWp]: Trace formula consists of 3180 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:05,832 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:05,863 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:09:05,863 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:06,061 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:09:06,062 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:06,062 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-10-15 01:09:06,062 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761182685] [2019-10-15 01:09:06,062 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:06,063 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:06,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:06,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-10-15 01:09:06,064 INFO L87 Difference]: Start difference. First operand 623 states and 991 transitions. Second operand 4 states. [2019-10-15 01:09:06,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:06,271 INFO L93 Difference]: Finished difference Result 1208 states and 1944 transitions. [2019-10-15 01:09:06,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:09:06,272 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 125 [2019-10-15 01:09:06,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:06,278 INFO L225 Difference]: With dead ends: 1208 [2019-10-15 01:09:06,278 INFO L226 Difference]: Without dead ends: 623 [2019-10-15 01:09:06,281 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 248 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-10-15 01:09:06,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2019-10-15 01:09:06,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 623. [2019-10-15 01:09:06,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 623 states. [2019-10-15 01:09:06,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 986 transitions. [2019-10-15 01:09:06,304 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 986 transitions. Word has length 125 [2019-10-15 01:09:06,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:06,304 INFO L462 AbstractCegarLoop]: Abstraction has 623 states and 986 transitions. [2019-10-15 01:09:06,304 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:06,305 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 986 transitions. [2019-10-15 01:09:06,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-10-15 01:09:06,307 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:06,307 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] [2019-10-15 01:09:06,517 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:06,518 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:06,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:06,518 INFO L82 PathProgramCache]: Analyzing trace with hash 202858592, now seen corresponding path program 1 times [2019-10-15 01:09:06,518 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:06,519 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292193269] [2019-10-15 01:09:06,519 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:06,519 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:06,519 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:06,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:06,685 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 01:09:06,685 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292193269] [2019-10-15 01:09:06,686 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842424329] [2019-10-15 01:09:06,686 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 [2019-10-15 01:09:07,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:07,373 INFO L256 TraceCheckSpWp]: Trace formula consists of 3182 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:07,378 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:07,411 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:09:07,411 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:07,625 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:09:07,626 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:07,626 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-10-15 01:09:07,626 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270940754] [2019-10-15 01:09:07,627 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:07,627 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:07,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:07,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-10-15 01:09:07,628 INFO L87 Difference]: Start difference. First operand 623 states and 986 transitions. Second operand 4 states. [2019-10-15 01:09:07,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:07,806 INFO L93 Difference]: Finished difference Result 1208 states and 1934 transitions. [2019-10-15 01:09:07,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:09:07,807 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 127 [2019-10-15 01:09:07,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:07,813 INFO L225 Difference]: With dead ends: 1208 [2019-10-15 01:09:07,813 INFO L226 Difference]: Without dead ends: 623 [2019-10-15 01:09:07,818 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 252 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-10-15 01:09:07,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2019-10-15 01:09:07,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 623. [2019-10-15 01:09:07,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 623 states. [2019-10-15 01:09:07,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 981 transitions. [2019-10-15 01:09:07,844 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 981 transitions. Word has length 127 [2019-10-15 01:09:07,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:07,846 INFO L462 AbstractCegarLoop]: Abstraction has 623 states and 981 transitions. [2019-10-15 01:09:07,846 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:07,846 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 981 transitions. [2019-10-15 01:09:07,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-10-15 01:09:07,848 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:07,849 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:08,058 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:08,059 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:08,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:08,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1413341996, now seen corresponding path program 1 times [2019-10-15 01:09:08,060 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:08,060 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914143260] [2019-10-15 01:09:08,060 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:08,060 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:08,061 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:08,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:08,227 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 01:09:08,228 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914143260] [2019-10-15 01:09:08,228 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647017093] [2019-10-15 01:09:08,228 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 [2019-10-15 01:09:09,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:09,046 INFO L256 TraceCheckSpWp]: Trace formula consists of 3184 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:09,052 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:09,100 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:09:09,101 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:09,396 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:09:09,396 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:09,396 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-10-15 01:09:09,397 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888889996] [2019-10-15 01:09:09,399 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:09,400 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:09,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:09,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-10-15 01:09:09,401 INFO L87 Difference]: Start difference. First operand 623 states and 981 transitions. Second operand 4 states. [2019-10-15 01:09:09,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:09,622 INFO L93 Difference]: Finished difference Result 1244 states and 1983 transitions. [2019-10-15 01:09:09,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:09:09,622 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 129 [2019-10-15 01:09:09,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:09,628 INFO L225 Difference]: With dead ends: 1244 [2019-10-15 01:09:09,628 INFO L226 Difference]: Without dead ends: 662 [2019-10-15 01:09:09,631 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 256 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-10-15 01:09:09,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2019-10-15 01:09:09,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 662. [2019-10-15 01:09:09,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 662 states. [2019-10-15 01:09:09,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 1045 transitions. [2019-10-15 01:09:09,654 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 1045 transitions. Word has length 129 [2019-10-15 01:09:09,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:09,654 INFO L462 AbstractCegarLoop]: Abstraction has 662 states and 1045 transitions. [2019-10-15 01:09:09,655 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:09,655 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 1045 transitions. [2019-10-15 01:09:09,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-10-15 01:09:09,657 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:09,657 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:09,866 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:09,866 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:09,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:09,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1210514670, now seen corresponding path program 1 times [2019-10-15 01:09:09,867 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:09,867 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923251627] [2019-10-15 01:09:09,867 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:09,868 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:09,868 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:09,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:10,024 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 01:09:10,024 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923251627] [2019-10-15 01:09:10,024 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822728786] [2019-10-15 01:09:10,024 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 [2019-10-15 01:09:10,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:10,742 INFO L256 TraceCheckSpWp]: Trace formula consists of 3185 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:10,747 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:10,787 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:09:10,788 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:10,990 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:09:10,990 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:10,990 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-10-15 01:09:10,990 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934888860] [2019-10-15 01:09:10,992 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:10,993 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:10,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:10,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-10-15 01:09:10,993 INFO L87 Difference]: Start difference. First operand 662 states and 1045 transitions. Second operand 4 states. [2019-10-15 01:09:11,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:11,212 INFO L93 Difference]: Finished difference Result 1247 states and 1986 transitions. [2019-10-15 01:09:11,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:09:11,214 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 130 [2019-10-15 01:09:11,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:11,220 INFO L225 Difference]: With dead ends: 1247 [2019-10-15 01:09:11,220 INFO L226 Difference]: Without dead ends: 662 [2019-10-15 01:09:11,224 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 258 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-10-15 01:09:11,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2019-10-15 01:09:11,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 662. [2019-10-15 01:09:11,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 662 states. [2019-10-15 01:09:11,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 1040 transitions. [2019-10-15 01:09:11,256 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 1040 transitions. Word has length 130 [2019-10-15 01:09:11,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:11,258 INFO L462 AbstractCegarLoop]: Abstraction has 662 states and 1040 transitions. [2019-10-15 01:09:11,258 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:11,258 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 1040 transitions. [2019-10-15 01:09:11,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-10-15 01:09:11,260 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:11,260 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] [2019-10-15 01:09:11,468 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:11,468 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:11,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:11,469 INFO L82 PathProgramCache]: Analyzing trace with hash 472678801, now seen corresponding path program 1 times [2019-10-15 01:09:11,469 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:11,470 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854846694] [2019-10-15 01:09:11,470 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:11,470 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:11,470 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:11,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:11,594 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 01:09:11,595 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854846694] [2019-10-15 01:09:11,595 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340428222] [2019-10-15 01:09:11,595 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 [2019-10-15 01:09:12,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:12,307 INFO L256 TraceCheckSpWp]: Trace formula consists of 3181 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-15 01:09:12,312 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:12,411 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:09:12,412 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:12,785 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:09:12,887 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:09:12,888 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:12,888 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 9] total 16 [2019-10-15 01:09:12,888 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454944244] [2019-10-15 01:09:12,889 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-15 01:09:12,889 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:12,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-15 01:09:12,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2019-10-15 01:09:12,890 INFO L87 Difference]: Start difference. First operand 662 states and 1040 transitions. Second operand 9 states. [2019-10-15 01:09:13,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:13,157 INFO L93 Difference]: Finished difference Result 1260 states and 2000 transitions. [2019-10-15 01:09:13,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-15 01:09:13,158 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 130 [2019-10-15 01:09:13,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:13,163 INFO L225 Difference]: With dead ends: 1260 [2019-10-15 01:09:13,164 INFO L226 Difference]: Without dead ends: 678 [2019-10-15 01:09:13,167 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 245 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2019-10-15 01:09:13,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2019-10-15 01:09:13,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 671. [2019-10-15 01:09:13,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 671 states. [2019-10-15 01:09:13,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 1053 transitions. [2019-10-15 01:09:13,201 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 1053 transitions. Word has length 130 [2019-10-15 01:09:13,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:13,201 INFO L462 AbstractCegarLoop]: Abstraction has 671 states and 1053 transitions. [2019-10-15 01:09:13,201 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-15 01:09:13,201 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 1053 transitions. [2019-10-15 01:09:13,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-10-15 01:09:13,205 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:13,205 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:13,422 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:13,422 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:13,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:13,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1474623496, now seen corresponding path program 1 times [2019-10-15 01:09:13,423 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:13,431 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135429451] [2019-10-15 01:09:13,431 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:13,431 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:13,431 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:13,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:13,540 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-15 01:09:13,541 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135429451] [2019-10-15 01:09:13,541 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807314718] [2019-10-15 01:09:13,541 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-10-15 01:09:14,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:14,184 INFO L256 TraceCheckSpWp]: Trace formula consists of 3185 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:14,190 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:14,289 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:09:14,289 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:14,473 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:09:14,473 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:14,473 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-15 01:09:14,473 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896159652] [2019-10-15 01:09:14,474 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:14,474 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:14,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:14,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:09:14,475 INFO L87 Difference]: Start difference. First operand 671 states and 1053 transitions. Second operand 4 states. [2019-10-15 01:09:14,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:14,653 INFO L93 Difference]: Finished difference Result 1261 states and 2003 transitions. [2019-10-15 01:09:14,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:09:14,654 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 131 [2019-10-15 01:09:14,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:14,658 INFO L225 Difference]: With dead ends: 1261 [2019-10-15 01:09:14,658 INFO L226 Difference]: Without dead ends: 671 [2019-10-15 01:09:14,662 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 258 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:09:14,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2019-10-15 01:09:14,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 671. [2019-10-15 01:09:14,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 671 states. [2019-10-15 01:09:14,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 1048 transitions. [2019-10-15 01:09:14,684 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 1048 transitions. Word has length 131 [2019-10-15 01:09:14,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:14,684 INFO L462 AbstractCegarLoop]: Abstraction has 671 states and 1048 transitions. [2019-10-15 01:09:14,684 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:14,685 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 1048 transitions. [2019-10-15 01:09:14,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-10-15 01:09:14,687 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:14,687 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] [2019-10-15 01:09:14,895 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:14,895 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:14,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:14,896 INFO L82 PathProgramCache]: Analyzing trace with hash -336808656, now seen corresponding path program 1 times [2019-10-15 01:09:14,896 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:14,897 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226558687] [2019-10-15 01:09:14,897 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:14,897 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:14,897 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:14,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:15,002 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:09:15,002 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226558687] [2019-10-15 01:09:15,003 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605270086] [2019-10-15 01:09:15,003 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 [2019-10-15 01:09:15,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:15,609 INFO L256 TraceCheckSpWp]: Trace formula consists of 3180 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:09:15,614 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:15,662 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 01:09:15,663 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:15,975 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 01:09:15,975 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:09:15,976 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 13 [2019-10-15 01:09:15,976 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102290364] [2019-10-15 01:09:15,977 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-15 01:09:15,978 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:15,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-15 01:09:15,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2019-10-15 01:09:15,979 INFO L87 Difference]: Start difference. First operand 671 states and 1048 transitions. Second operand 11 states. [2019-10-15 01:09:16,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:16,111 INFO L93 Difference]: Finished difference Result 1198 states and 1897 transitions. [2019-10-15 01:09:16,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-15 01:09:16,111 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 130 [2019-10-15 01:09:16,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:16,118 INFO L225 Difference]: With dead ends: 1198 [2019-10-15 01:09:16,118 INFO L226 Difference]: Without dead ends: 688 [2019-10-15 01:09:16,122 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 [2019-10-15 01:09:16,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2019-10-15 01:09:16,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 678. [2019-10-15 01:09:16,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 678 states. [2019-10-15 01:09:16,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 678 states to 678 states and 1058 transitions. [2019-10-15 01:09:16,156 INFO L78 Accepts]: Start accepts. Automaton has 678 states and 1058 transitions. Word has length 130 [2019-10-15 01:09:16,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:16,156 INFO L462 AbstractCegarLoop]: Abstraction has 678 states and 1058 transitions. [2019-10-15 01:09:16,156 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-15 01:09:16,156 INFO L276 IsEmpty]: Start isEmpty. Operand 678 states and 1058 transitions. [2019-10-15 01:09:16,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-10-15 01:09:16,159 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:16,159 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:16,368 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:16,369 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:16,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:16,369 INFO L82 PathProgramCache]: Analyzing trace with hash -209429147, now seen corresponding path program 1 times [2019-10-15 01:09:16,369 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:16,370 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004229962] [2019-10-15 01:09:16,370 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:16,370 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:16,370 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:16,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:16,462 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:09:16,463 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004229962] [2019-10-15 01:09:16,463 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070569939] [2019-10-15 01:09:16,463 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 [2019-10-15 01:09:17,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:17,223 INFO L256 TraceCheckSpWp]: Trace formula consists of 3187 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:09:17,227 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:17,277 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 01:09:17,278 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:17,565 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 01:09:17,565 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:09:17,566 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 10 [2019-10-15 01:09:17,566 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464174676] [2019-10-15 01:09:17,567 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-15 01:09:17,567 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:17,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-15 01:09:17,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-10-15 01:09:17,568 INFO L87 Difference]: Start difference. First operand 678 states and 1058 transitions. Second operand 8 states. [2019-10-15 01:09:17,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:17,681 INFO L93 Difference]: Finished difference Result 1202 states and 1906 transitions. [2019-10-15 01:09:17,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:09:17,682 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 133 [2019-10-15 01:09:17,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:17,686 INFO L225 Difference]: With dead ends: 1202 [2019-10-15 01:09:17,687 INFO L226 Difference]: Without dead ends: 692 [2019-10-15 01:09:17,690 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 257 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2019-10-15 01:09:17,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2019-10-15 01:09:17,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 685. [2019-10-15 01:09:17,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 685 states. [2019-10-15 01:09:17,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 1069 transitions. [2019-10-15 01:09:17,719 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 1069 transitions. Word has length 133 [2019-10-15 01:09:17,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:17,720 INFO L462 AbstractCegarLoop]: Abstraction has 685 states and 1069 transitions. [2019-10-15 01:09:17,720 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-15 01:09:17,720 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 1069 transitions. [2019-10-15 01:09:17,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-10-15 01:09:17,727 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:17,727 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] [2019-10-15 01:09:17,937 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:17,938 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:17,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:17,938 INFO L82 PathProgramCache]: Analyzing trace with hash -433443423, now seen corresponding path program 1 times [2019-10-15 01:09:17,939 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:17,939 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285025744] [2019-10-15 01:09:17,939 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:17,940 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:17,940 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:17,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:18,034 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:09:18,034 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285025744] [2019-10-15 01:09:18,035 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646117195] [2019-10-15 01:09:18,035 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 [2019-10-15 01:09:18,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:18,808 INFO L256 TraceCheckSpWp]: Trace formula consists of 3177 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-15 01:09:18,813 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:18,894 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:09:18,895 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:19,239 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:09:19,446 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:09:19,447 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:09:19,447 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [4] total 16 [2019-10-15 01:09:19,447 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044147206] [2019-10-15 01:09:19,447 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-15 01:09:19,448 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:19,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-15 01:09:19,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2019-10-15 01:09:19,448 INFO L87 Difference]: Start difference. First operand 685 states and 1069 transitions. Second operand 14 states. [2019-10-15 01:09:19,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:19,746 INFO L93 Difference]: Finished difference Result 1203 states and 1906 transitions. [2019-10-15 01:09:19,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-15 01:09:19,747 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 131 [2019-10-15 01:09:19,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:19,753 INFO L225 Difference]: With dead ends: 1203 [2019-10-15 01:09:19,753 INFO L226 Difference]: Without dead ends: 693 [2019-10-15 01:09:19,764 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 [2019-10-15 01:09:19,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2019-10-15 01:09:19,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 685. [2019-10-15 01:09:19,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 685 states. [2019-10-15 01:09:19,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 1069 transitions. [2019-10-15 01:09:19,800 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 1069 transitions. Word has length 131 [2019-10-15 01:09:19,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:19,800 INFO L462 AbstractCegarLoop]: Abstraction has 685 states and 1069 transitions. [2019-10-15 01:09:19,801 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-15 01:09:19,801 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 1069 transitions. [2019-10-15 01:09:19,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-10-15 01:09:19,805 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:19,805 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] [2019-10-15 01:09:20,026 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:20,026 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:20,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:20,026 INFO L82 PathProgramCache]: Analyzing trace with hash 227766315, now seen corresponding path program 1 times [2019-10-15 01:09:20,027 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:20,027 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409621604] [2019-10-15 01:09:20,027 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:20,027 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:20,027 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:20,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:20,153 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:09:20,153 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409621604] [2019-10-15 01:09:20,154 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138816050] [2019-10-15 01:09:20,154 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 [2019-10-15 01:09:20,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:20,872 INFO L256 TraceCheckSpWp]: Trace formula consists of 3178 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-15 01:09:20,877 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:20,956 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:09:20,957 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:21,279 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:09:21,383 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:09:21,384 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:09:21,384 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [4] total 13 [2019-10-15 01:09:21,384 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432027518] [2019-10-15 01:09:21,385 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-15 01:09:21,385 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:21,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-15 01:09:21,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2019-10-15 01:09:21,386 INFO L87 Difference]: Start difference. First operand 685 states and 1069 transitions. Second operand 11 states. [2019-10-15 01:09:21,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:21,603 INFO L93 Difference]: Finished difference Result 1204 states and 1914 transitions. [2019-10-15 01:09:21,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-15 01:09:21,604 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 132 [2019-10-15 01:09:21,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:21,609 INFO L225 Difference]: With dead ends: 1204 [2019-10-15 01:09:21,609 INFO L226 Difference]: Without dead ends: 694 [2019-10-15 01:09:21,612 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 [2019-10-15 01:09:21,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2019-10-15 01:09:21,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 687. [2019-10-15 01:09:21,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 687 states. [2019-10-15 01:09:21,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 1075 transitions. [2019-10-15 01:09:21,636 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 1075 transitions. Word has length 132 [2019-10-15 01:09:21,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:21,637 INFO L462 AbstractCegarLoop]: Abstraction has 687 states and 1075 transitions. [2019-10-15 01:09:21,637 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-15 01:09:21,637 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 1075 transitions. [2019-10-15 01:09:21,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-10-15 01:09:21,640 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:21,641 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:21,851 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:21,851 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:21,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:21,851 INFO L82 PathProgramCache]: Analyzing trace with hash -2113698496, now seen corresponding path program 1 times [2019-10-15 01:09:21,852 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:21,852 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525416277] [2019-10-15 01:09:21,852 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:21,852 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:21,852 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:21,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:21,941 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:09:21,942 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525416277] [2019-10-15 01:09:21,942 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973512890] [2019-10-15 01:09:21,942 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 [2019-10-15 01:09:22,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:22,766 INFO L256 TraceCheckSpWp]: Trace formula consists of 3185 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-15 01:09:22,770 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:22,806 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-15 01:09:22,806 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:23,025 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:09:23,106 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-15 01:09:23,107 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:09:23,107 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [4] total 11 [2019-10-15 01:09:23,107 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068480996] [2019-10-15 01:09:23,108 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-15 01:09:23,108 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:23,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-15 01:09:23,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2019-10-15 01:09:23,109 INFO L87 Difference]: Start difference. First operand 687 states and 1075 transitions. Second operand 9 states. [2019-10-15 01:09:23,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:23,235 INFO L93 Difference]: Finished difference Result 1300 states and 2079 transitions. [2019-10-15 01:09:23,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:09:23,236 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 135 [2019-10-15 01:09:23,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:23,245 INFO L225 Difference]: With dead ends: 1300 [2019-10-15 01:09:23,245 INFO L226 Difference]: Without dead ends: 696 [2019-10-15 01:09:23,248 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 264 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2019-10-15 01:09:23,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2019-10-15 01:09:23,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 694. [2019-10-15 01:09:23,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 694 states. [2019-10-15 01:09:23,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 1083 transitions. [2019-10-15 01:09:23,274 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 1083 transitions. Word has length 135 [2019-10-15 01:09:23,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:23,275 INFO L462 AbstractCegarLoop]: Abstraction has 694 states and 1083 transitions. [2019-10-15 01:09:23,275 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-15 01:09:23,275 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 1083 transitions. [2019-10-15 01:09:23,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-10-15 01:09:23,278 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:23,278 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] [2019-10-15 01:09:23,488 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:23,488 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:23,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:23,489 INFO L82 PathProgramCache]: Analyzing trace with hash -2061806697, now seen corresponding path program 1 times [2019-10-15 01:09:23,489 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:23,490 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965685047] [2019-10-15 01:09:23,490 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:23,490 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:23,491 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:23,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:23,573 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:09:23,573 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965685047] [2019-10-15 01:09:23,574 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980024039] [2019-10-15 01:09:23,574 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 [2019-10-15 01:09:24,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:24,321 INFO L256 TraceCheckSpWp]: Trace formula consists of 3186 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-15 01:09:24,325 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:24,359 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-15 01:09:24,359 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:24,582 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:09:24,649 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-15 01:09:24,650 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:09:24,650 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [4] total 10 [2019-10-15 01:09:24,650 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485693768] [2019-10-15 01:09:24,651 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-15 01:09:24,651 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:24,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-15 01:09:24,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-10-15 01:09:24,651 INFO L87 Difference]: Start difference. First operand 694 states and 1083 transitions. Second operand 8 states. [2019-10-15 01:09:24,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:24,788 INFO L93 Difference]: Finished difference Result 1314 states and 2090 transitions. [2019-10-15 01:09:24,788 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-15 01:09:24,788 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 136 [2019-10-15 01:09:24,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:24,793 INFO L225 Difference]: With dead ends: 1314 [2019-10-15 01:09:24,794 INFO L226 Difference]: Without dead ends: 703 [2019-10-15 01:09:24,797 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 266 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2019-10-15 01:09:24,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2019-10-15 01:09:24,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 698. [2019-10-15 01:09:24,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 698 states. [2019-10-15 01:09:24,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 1089 transitions. [2019-10-15 01:09:24,820 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 1089 transitions. Word has length 136 [2019-10-15 01:09:24,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:24,820 INFO L462 AbstractCegarLoop]: Abstraction has 698 states and 1089 transitions. [2019-10-15 01:09:24,820 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-15 01:09:24,820 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 1089 transitions. [2019-10-15 01:09:24,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-10-15 01:09:24,823 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:24,824 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, 1] [2019-10-15 01:09:25,033 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:25,034 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:25,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:25,034 INFO L82 PathProgramCache]: Analyzing trace with hash 917824741, now seen corresponding path program 1 times [2019-10-15 01:09:25,035 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:25,035 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134373859] [2019-10-15 01:09:25,035 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:25,035 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:25,036 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:25,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:25,141 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:09:25,141 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134373859] [2019-10-15 01:09:25,141 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841875371] [2019-10-15 01:09:25,142 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