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_product30.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:09:18,064 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:09:18,066 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:09:18,085 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:09:18,086 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:09:18,088 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:09:18,089 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:09:18,099 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:09:18,103 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:09:18,107 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:09:18,108 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:09:18,110 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:09:18,110 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:09:18,112 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:09:18,114 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:09:18,116 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:09:18,117 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:09:18,118 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:09:18,120 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:09:18,126 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:09:18,131 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:09:18,134 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:09:18,137 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:09:18,138 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:09:18,140 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 01:09:18,141 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 01:09:18,141 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 01:09:18,143 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 01:09:18,144 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 01:09:18,145 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 01:09:18,146 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 01:09:18,147 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 01:09:18,148 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 01:09:18,149 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 01:09:18,151 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 01:09:18,151 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 01:09:18,152 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 01:09:18,152 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 01:09:18,152 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:09:18,153 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:09:18,155 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:09:18,155 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 01:09:18,182 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:09:18,182 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:09:18,183 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:09:18,185 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:09:18,185 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:09:18,185 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:09:18,186 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:09:18,186 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:09:18,186 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:09:18,186 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:09:18,186 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:09:18,186 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:09:18,187 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:09:18,187 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:09:18,187 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:09:18,187 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:09:18,187 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:09:18,188 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:09:18,188 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:09:18,188 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:09:18,188 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:09:18,188 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:09:18,189 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:09:18,189 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:09:18,189 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:09:18,189 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:09:18,189 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:09:18,190 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:09:18,190 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 01:09:18,473 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:09:18,488 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:09:18,493 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:09:18,494 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:09:18,495 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:09:18,495 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec1_product30.cil.c [2019-10-15 01:09:18,573 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/79ea43845/cb6df54383554d77a592d8985630b82c/FLAG3b290bfad [2019-10-15 01:09:19,210 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:09:19,210 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec1_product30.cil.c [2019-10-15 01:09:19,240 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/79ea43845/cb6df54383554d77a592d8985630b82c/FLAG3b290bfad [2019-10-15 01:09:19,355 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/79ea43845/cb6df54383554d77a592d8985630b82c [2019-10-15 01:09:19,364 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:09:19,365 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:09:19,366 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:09:19,366 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:09:19,370 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:09:19,371 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:09:19" (1/1) ... [2019-10-15 01:09:19,376 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79976c1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:09:19, skipping insertion in model container [2019-10-15 01:09:19,376 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:09:19" (1/1) ... [2019-10-15 01:09:19,385 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:09:19,479 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:09:20,222 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:09:20,252 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:09:20,386 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:09:20,456 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:09:20,457 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:09:20 WrapperNode [2019-10-15 01:09:20,457 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:09:20,458 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:09:20,458 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:09:20,458 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:09:20,471 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:09:20" (1/1) ... [2019-10-15 01:09:20,471 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:09:20" (1/1) ... [2019-10-15 01:09:20,514 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:09:20" (1/1) ... [2019-10-15 01:09:20,515 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:09:20" (1/1) ... [2019-10-15 01:09:20,582 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:09:20" (1/1) ... [2019-10-15 01:09:20,628 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:09:20" (1/1) ... [2019-10-15 01:09:20,650 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:09:20" (1/1) ... [2019-10-15 01:09:20,679 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:09:20,679 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:09:20,680 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:09:20,680 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:09:20,681 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:09:20" (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 01:09:20,753 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:09:20,753 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:09:20,753 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-15 01:09:20,754 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-15 01:09:20,754 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-10-15 01:09:20,754 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-10-15 01:09:20,754 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-15 01:09:20,755 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-15 01:09:20,755 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-15 01:09:20,755 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-15 01:09:20,755 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-15 01:09:20,756 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-15 01:09:20,756 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-15 01:09:20,756 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-15 01:09:20,756 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-15 01:09:20,757 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-15 01:09:20,757 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-15 01:09:20,757 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-10-15 01:09:20,757 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-10-15 01:09:20,758 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-10-15 01:09:20,758 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-10-15 01:09:20,760 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-10-15 01:09:20,761 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-10-15 01:09:20,761 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-10-15 01:09:20,761 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-10-15 01:09:20,761 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-15 01:09:20,761 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-10-15 01:09:20,761 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-10-15 01:09:20,761 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-10-15 01:09:20,762 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-15 01:09:20,762 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-10-15 01:09:20,762 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-15 01:09:20,762 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-15 01:09:20,763 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:09:20,763 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-10-15 01:09:20,763 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-10-15 01:09:20,763 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-10-15 01:09:20,763 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-10-15 01:09:20,764 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-10-15 01:09:20,764 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-10-15 01:09:20,764 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-10-15 01:09:20,764 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-10-15 01:09:20,764 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-10-15 01:09:20,765 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-10-15 01:09:20,765 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-10-15 01:09:20,765 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-10-15 01:09:20,765 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-10-15 01:09:20,765 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-10-15 01:09:20,765 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-10-15 01:09:20,766 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-10-15 01:09:20,766 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-10-15 01:09:20,766 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__weight [2019-10-15 01:09:20,766 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-10-15 01:09:20,766 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-10-15 01:09:20,767 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-10-15 01:09:20,767 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-10-15 01:09:20,767 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-10-15 01:09:20,767 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-10-15 01:09:20,767 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-10-15 01:09:20,768 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-10-15 01:09:20,768 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-10-15 01:09:20,768 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-10-15 01:09:20,768 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2019-10-15 01:09:20,769 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-10-15 01:09:20,769 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-10-15 01:09:20,769 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-10-15 01:09:20,769 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-10-15 01:09:20,769 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-10-15 01:09:20,770 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-10-15 01:09:20,770 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-10-15 01:09:20,770 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__twothirdsfull [2019-10-15 01:09:20,770 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-15 01:09:20,770 INFO L138 BoogieDeclarations]: Found implementation of procedure printState__wrappee__twothirdsfull [2019-10-15 01:09:20,770 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-10-15 01:09:20,771 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-10-15 01:09:20,771 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2019-10-15 01:09:20,771 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__2 [2019-10-15 01:09:20,771 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__3 [2019-10-15 01:09:20,771 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__4 [2019-10-15 01:09:20,772 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:09:20,772 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:09:20,772 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-15 01:09:20,772 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-10-15 01:09:20,772 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-10-15 01:09:20,773 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-15 01:09:20,773 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-10-15 01:09:20,773 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-10-15 01:09:20,773 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-10-15 01:09:20,774 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-10-15 01:09:20,774 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-10-15 01:09:20,774 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-10-15 01:09:20,774 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-15 01:09:20,774 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-15 01:09:20,774 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-15 01:09:20,775 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-15 01:09:20,775 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-15 01:09:20,775 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-15 01:09:20,775 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:09:20,776 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-15 01:09:20,776 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-15 01:09:20,776 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:09:20,776 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-15 01:09:20,776 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-15 01:09:20,776 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:09:20,777 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-15 01:09:20,777 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-15 01:09:20,777 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:09:20,777 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-15 01:09:20,777 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-10-15 01:09:20,778 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-10-15 01:09:20,778 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-15 01:09:20,778 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-15 01:09:20,778 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-15 01:09:20,778 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-15 01:09:20,779 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-15 01:09:20,779 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-15 01:09:20,779 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:09:20,779 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-10-15 01:09:20,779 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-10-15 01:09:20,779 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-10-15 01:09:20,780 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-10-15 01:09:20,780 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-10-15 01:09:20,780 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-10-15 01:09:20,780 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-10-15 01:09:20,780 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-10-15 01:09:20,781 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-10-15 01:09:20,781 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-10-15 01:09:20,781 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-15 01:09:20,781 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-10-15 01:09:20,781 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-15 01:09:20,782 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2019-10-15 01:09:20,782 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__4 [2019-10-15 01:09:20,782 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-15 01:09:20,782 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:09:20,782 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-10-15 01:09:20,783 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-10-15 01:09:20,783 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-10-15 01:09:20,783 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-10-15 01:09:20,783 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-10-15 01:09:20,783 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-10-15 01:09:20,783 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-10-15 01:09:20,784 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__2 [2019-10-15 01:09:20,784 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-10-15 01:09:20,784 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-10-15 01:09:20,784 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-15 01:09:20,784 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-10-15 01:09:20,785 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-10-15 01:09:20,785 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-10-15 01:09:20,785 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-10-15 01:09:20,785 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-10-15 01:09:20,785 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-10-15 01:09:20,785 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-10-15 01:09:20,786 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-10-15 01:09:20,786 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__weight [2019-10-15 01:09:20,786 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-10-15 01:09:20,786 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-10-15 01:09:20,786 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-10-15 01:09:20,786 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-10-15 01:09:20,786 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-10-15 01:09:20,787 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2019-10-15 01:09:20,787 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-10-15 01:09:20,787 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-10-15 01:09:20,787 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-10-15 01:09:20,787 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-10-15 01:09:20,787 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-10-15 01:09:20,787 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-10-15 01:09:20,788 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__twothirdsfull [2019-10-15 01:09:20,788 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__3 [2019-10-15 01:09:20,788 INFO L130 BoogieDeclarations]: Found specification of procedure printState__wrappee__twothirdsfull [2019-10-15 01:09:20,788 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-10-15 01:09:20,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:09:20,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-15 01:09:20,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:09:23,427 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:09:23,427 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-15 01:09:23,430 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:09:23 BoogieIcfgContainer [2019-10-15 01:09:23,431 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:09:23,432 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:09:23,432 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:09:23,435 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:09:23,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:09:19" (1/3) ... [2019-10-15 01:09:23,436 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c138d7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:09:23, skipping insertion in model container [2019-10-15 01:09:23,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:09:20" (2/3) ... [2019-10-15 01:09:23,437 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c138d7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:09:23, skipping insertion in model container [2019-10-15 01:09:23,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:09:23" (3/3) ... [2019-10-15 01:09:23,439 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product30.cil.c [2019-10-15 01:09:23,449 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:09:23,462 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:09:23,473 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:09:23,518 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:09:23,518 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:09:23,518 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:09:23,518 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:09:23,518 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:09:23,518 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:09:23,519 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:09:23,519 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:09:23,554 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states. [2019-10-15 01:09:23,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-10-15 01:09:23,572 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:23,573 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 01:09:23,575 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:23,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:23,582 INFO L82 PathProgramCache]: Analyzing trace with hash -2022384104, now seen corresponding path program 1 times [2019-10-15 01:09:23,592 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:23,592 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601247519] [2019-10-15 01:09:23,593 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:23,593 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:23,593 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:23,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:24,241 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 01:09:24,242 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601247519] [2019-10-15 01:09:24,243 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335504286] [2019-10-15 01:09:24,243 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 01:09:24,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:24,989 INFO L256 TraceCheckSpWp]: Trace formula consists of 3170 conjuncts, 1 conjunts are in the unsatisfiable core [2019-10-15 01:09:25,005 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:25,038 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 01:09:25,039 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:25,278 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 01:09:25,279 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:09:25,279 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [4] total 4 [2019-10-15 01:09:25,280 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582161393] [2019-10-15 01:09:25,288 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-15 01:09:25,290 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:25,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-15 01:09:25,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:09:25,308 INFO L87 Difference]: Start difference. First operand 806 states. Second operand 2 states. [2019-10-15 01:09:25,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:25,433 INFO L93 Difference]: Finished difference Result 682 states and 1081 transitions. [2019-10-15 01:09:25,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-15 01:09:25,435 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 116 [2019-10-15 01:09:25,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:25,476 INFO L225 Difference]: With dead ends: 682 [2019-10-15 01:09:25,476 INFO L226 Difference]: Without dead ends: 645 [2019-10-15 01:09:25,482 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 01:09:25,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2019-10-15 01:09:25,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 645. [2019-10-15 01:09:25,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 645 states. [2019-10-15 01:09:25,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 1026 transitions. [2019-10-15 01:09:25,629 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 1026 transitions. Word has length 116 [2019-10-15 01:09:25,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:25,640 INFO L462 AbstractCegarLoop]: Abstraction has 645 states and 1026 transitions. [2019-10-15 01:09:25,640 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-15 01:09:25,641 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 1026 transitions. [2019-10-15 01:09:25,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-10-15 01:09:25,665 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:25,666 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 01:09:25,867 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:25,867 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:25,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:25,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1798333227, now seen corresponding path program 1 times [2019-10-15 01:09:25,868 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:25,868 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643094812] [2019-10-15 01:09:25,868 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:25,869 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:25,869 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:26,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:26,160 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 01:09:26,161 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643094812] [2019-10-15 01:09:26,161 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976799638] [2019-10-15 01:09:26,162 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 01:09:26,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:26,809 INFO L256 TraceCheckSpWp]: Trace formula consists of 3173 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:26,819 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:26,877 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 01:09:26,877 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:27,111 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 01:09:27,111 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:27,112 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-15 01:09:27,112 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264163615] [2019-10-15 01:09:27,113 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:27,113 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:27,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:27,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:09:27,114 INFO L87 Difference]: Start difference. First operand 645 states and 1026 transitions. Second operand 4 states. [2019-10-15 01:09:27,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:27,212 INFO L93 Difference]: Finished difference Result 1262 states and 2025 transitions. [2019-10-15 01:09:27,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:09:27,213 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 118 [2019-10-15 01:09:27,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:27,219 INFO L225 Difference]: With dead ends: 1262 [2019-10-15 01:09:27,220 INFO L226 Difference]: Without dead ends: 645 [2019-10-15 01:09:27,226 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 01:09:27,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2019-10-15 01:09:27,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 645. [2019-10-15 01:09:27,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 645 states. [2019-10-15 01:09:27,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 1025 transitions. [2019-10-15 01:09:27,261 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 1025 transitions. Word has length 118 [2019-10-15 01:09:27,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:27,262 INFO L462 AbstractCegarLoop]: Abstraction has 645 states and 1025 transitions. [2019-10-15 01:09:27,262 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:27,262 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 1025 transitions. [2019-10-15 01:09:27,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-10-15 01:09:27,265 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:27,265 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 01:09:27,473 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:27,474 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:27,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:27,476 INFO L82 PathProgramCache]: Analyzing trace with hash 2025770863, now seen corresponding path program 1 times [2019-10-15 01:09:27,476 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:27,477 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470569207] [2019-10-15 01:09:27,477 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:27,477 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:27,477 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:27,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:27,629 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 01:09:27,630 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470569207] [2019-10-15 01:09:27,630 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817251663] [2019-10-15 01:09:27,630 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 01:09:28,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:28,224 INFO L256 TraceCheckSpWp]: Trace formula consists of 3175 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:28,231 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:28,261 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 01:09:28,262 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:28,453 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 01:09:28,454 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:28,454 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-15 01:09:28,454 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765653216] [2019-10-15 01:09:28,455 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:28,455 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:28,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:28,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:09:28,456 INFO L87 Difference]: Start difference. First operand 645 states and 1025 transitions. Second operand 4 states. [2019-10-15 01:09:28,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:28,536 INFO L93 Difference]: Finished difference Result 1262 states and 2023 transitions. [2019-10-15 01:09:28,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:09:28,536 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 120 [2019-10-15 01:09:28,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:28,542 INFO L225 Difference]: With dead ends: 1262 [2019-10-15 01:09:28,542 INFO L226 Difference]: Without dead ends: 645 [2019-10-15 01:09:28,545 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 01:09:28,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2019-10-15 01:09:28,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 645. [2019-10-15 01:09:28,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 645 states. [2019-10-15 01:09:28,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 1024 transitions. [2019-10-15 01:09:28,575 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 1024 transitions. Word has length 120 [2019-10-15 01:09:28,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:28,575 INFO L462 AbstractCegarLoop]: Abstraction has 645 states and 1024 transitions. [2019-10-15 01:09:28,575 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:28,576 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 1024 transitions. [2019-10-15 01:09:28,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-10-15 01:09:28,578 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:28,578 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 01:09:28,788 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:28,789 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:28,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:28,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1223604915, now seen corresponding path program 1 times [2019-10-15 01:09:28,790 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:28,791 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936400511] [2019-10-15 01:09:28,791 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:28,791 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:28,791 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:28,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:28,980 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 01:09:28,980 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936400511] [2019-10-15 01:09:28,981 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582343411] [2019-10-15 01:09:28,981 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 01:09:29,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:29,528 INFO L256 TraceCheckSpWp]: Trace formula consists of 3177 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:29,541 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:29,585 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 01:09:29,585 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:29,879 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 01:09:29,881 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:29,881 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-15 01:09:29,882 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838077577] [2019-10-15 01:09:29,882 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:29,883 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:29,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:29,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:09:29,883 INFO L87 Difference]: Start difference. First operand 645 states and 1024 transitions. Second operand 4 states. [2019-10-15 01:09:29,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:29,969 INFO L93 Difference]: Finished difference Result 1269 states and 2030 transitions. [2019-10-15 01:09:29,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:09:29,969 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 122 [2019-10-15 01:09:29,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:29,975 INFO L225 Difference]: With dead ends: 1269 [2019-10-15 01:09:29,975 INFO L226 Difference]: Without dead ends: 654 [2019-10-15 01:09:29,979 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 01:09:29,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2019-10-15 01:09:30,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 654. [2019-10-15 01:09:30,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 654 states. [2019-10-15 01:09:30,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 1036 transitions. [2019-10-15 01:09:30,008 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 1036 transitions. Word has length 122 [2019-10-15 01:09:30,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:30,009 INFO L462 AbstractCegarLoop]: Abstraction has 654 states and 1036 transitions. [2019-10-15 01:09:30,009 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:30,009 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 1036 transitions. [2019-10-15 01:09:30,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-10-15 01:09:30,012 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:30,012 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 01:09:30,226 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:30,227 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:30,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:30,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1957225257, now seen corresponding path program 1 times [2019-10-15 01:09:30,228 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:30,229 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265848431] [2019-10-15 01:09:30,229 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:30,229 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:30,230 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:30,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:30,351 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 01:09:30,352 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265848431] [2019-10-15 01:09:30,352 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113299228] [2019-10-15 01:09:30,352 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 01:09:30,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:30,997 INFO L256 TraceCheckSpWp]: Trace formula consists of 3178 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:31,007 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:31,034 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 01:09:31,035 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:31,295 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 01:09:31,296 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:31,296 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-15 01:09:31,296 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136605361] [2019-10-15 01:09:31,297 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:31,297 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:31,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:31,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:09:31,299 INFO L87 Difference]: Start difference. First operand 654 states and 1036 transitions. Second operand 4 states. [2019-10-15 01:09:31,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:31,404 INFO L93 Difference]: Finished difference Result 1271 states and 2031 transitions. [2019-10-15 01:09:31,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:09:31,405 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 123 [2019-10-15 01:09:31,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:31,412 INFO L225 Difference]: With dead ends: 1271 [2019-10-15 01:09:31,412 INFO L226 Difference]: Without dead ends: 654 [2019-10-15 01:09:31,419 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 01:09:31,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2019-10-15 01:09:31,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 654. [2019-10-15 01:09:31,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 654 states. [2019-10-15 01:09:31,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 1035 transitions. [2019-10-15 01:09:31,445 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 1035 transitions. Word has length 123 [2019-10-15 01:09:31,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:31,446 INFO L462 AbstractCegarLoop]: Abstraction has 654 states and 1035 transitions. [2019-10-15 01:09:31,446 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:31,447 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 1035 transitions. [2019-10-15 01:09:31,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-10-15 01:09:31,451 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:31,451 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 01:09:31,658 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:31,659 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:31,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:31,659 INFO L82 PathProgramCache]: Analyzing trace with hash 974787383, now seen corresponding path program 1 times [2019-10-15 01:09:31,660 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:31,660 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635596311] [2019-10-15 01:09:31,660 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:31,660 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:31,661 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:31,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:31,781 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 01:09:31,782 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635596311] [2019-10-15 01:09:31,782 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606714321] [2019-10-15 01:09:31,782 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 01:09:32,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:32,393 INFO L256 TraceCheckSpWp]: Trace formula consists of 3179 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:32,398 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:32,433 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 01:09:32,433 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:32,653 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 01:09:32,654 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:32,654 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-15 01:09:32,655 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007881054] [2019-10-15 01:09:32,656 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:32,656 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:32,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:32,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:09:32,657 INFO L87 Difference]: Start difference. First operand 654 states and 1035 transitions. Second operand 4 states. [2019-10-15 01:09:32,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:32,792 INFO L93 Difference]: Finished difference Result 1271 states and 2030 transitions. [2019-10-15 01:09:32,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:09:32,792 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 124 [2019-10-15 01:09:32,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:32,802 INFO L225 Difference]: With dead ends: 1271 [2019-10-15 01:09:32,802 INFO L226 Difference]: Without dead ends: 654 [2019-10-15 01:09:32,805 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 01:09:32,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2019-10-15 01:09:32,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 654. [2019-10-15 01:09:32,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 654 states. [2019-10-15 01:09:32,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 1034 transitions. [2019-10-15 01:09:32,828 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 1034 transitions. Word has length 124 [2019-10-15 01:09:32,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:32,829 INFO L462 AbstractCegarLoop]: Abstraction has 654 states and 1034 transitions. [2019-10-15 01:09:32,829 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:32,829 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 1034 transitions. [2019-10-15 01:09:32,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-10-15 01:09:32,831 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:32,831 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 01:09:33,039 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:33,040 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:33,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:33,040 INFO L82 PathProgramCache]: Analyzing trace with hash 131398875, now seen corresponding path program 1 times [2019-10-15 01:09:33,041 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:33,041 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020638497] [2019-10-15 01:09:33,041 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:33,042 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:33,042 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:33,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:33,223 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 01:09:33,223 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020638497] [2019-10-15 01:09:33,224 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250164292] [2019-10-15 01:09:33,224 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 01:09:33,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:33,867 INFO L256 TraceCheckSpWp]: Trace formula consists of 3180 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:33,873 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:33,914 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 01:09:33,915 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:34,128 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 01:09:34,129 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:34,129 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-10-15 01:09:34,129 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263716286] [2019-10-15 01:09:34,130 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:34,130 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:34,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:34,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-10-15 01:09:34,131 INFO L87 Difference]: Start difference. First operand 654 states and 1034 transitions. Second operand 4 states. [2019-10-15 01:09:34,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:34,343 INFO L93 Difference]: Finished difference Result 1270 states and 2030 transitions. [2019-10-15 01:09:34,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:09:34,344 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 125 [2019-10-15 01:09:34,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:34,351 INFO L225 Difference]: With dead ends: 1270 [2019-10-15 01:09:34,351 INFO L226 Difference]: Without dead ends: 654 [2019-10-15 01:09:34,355 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 01:09:34,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2019-10-15 01:09:34,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 654. [2019-10-15 01:09:34,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 654 states. [2019-10-15 01:09:34,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 1029 transitions. [2019-10-15 01:09:34,387 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 1029 transitions. Word has length 125 [2019-10-15 01:09:34,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:34,388 INFO L462 AbstractCegarLoop]: Abstraction has 654 states and 1029 transitions. [2019-10-15 01:09:34,388 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:34,388 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 1029 transitions. [2019-10-15 01:09:34,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-10-15 01:09:34,391 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:34,392 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 01:09:34,611 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:34,611 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:34,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:34,612 INFO L82 PathProgramCache]: Analyzing trace with hash 2025700873, now seen corresponding path program 1 times [2019-10-15 01:09:34,612 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:34,613 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636289483] [2019-10-15 01:09:34,613 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:34,613 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:34,613 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:34,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:34,930 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 01:09:34,931 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636289483] [2019-10-15 01:09:34,935 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448531575] [2019-10-15 01:09:34,935 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 01:09:35,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:35,601 INFO L256 TraceCheckSpWp]: Trace formula consists of 3182 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:35,605 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:35,640 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 01:09:35,640 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:35,862 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 01:09:35,863 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:35,863 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-10-15 01:09:35,863 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260045024] [2019-10-15 01:09:35,866 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:35,868 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:35,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:35,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-10-15 01:09:35,868 INFO L87 Difference]: Start difference. First operand 654 states and 1029 transitions. Second operand 4 states. [2019-10-15 01:09:36,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:36,044 INFO L93 Difference]: Finished difference Result 1270 states and 2020 transitions. [2019-10-15 01:09:36,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:09:36,045 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 127 [2019-10-15 01:09:36,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:36,050 INFO L225 Difference]: With dead ends: 1270 [2019-10-15 01:09:36,050 INFO L226 Difference]: Without dead ends: 654 [2019-10-15 01:09:36,054 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 01:09:36,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2019-10-15 01:09:36,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 654. [2019-10-15 01:09:36,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 654 states. [2019-10-15 01:09:36,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 1024 transitions. [2019-10-15 01:09:36,077 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 1024 transitions. Word has length 127 [2019-10-15 01:09:36,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:36,077 INFO L462 AbstractCegarLoop]: Abstraction has 654 states and 1024 transitions. [2019-10-15 01:09:36,077 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:36,077 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 1024 transitions. [2019-10-15 01:09:36,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-10-15 01:09:36,080 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:36,080 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 01:09:36,288 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:36,289 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:36,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:36,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1647818991, now seen corresponding path program 1 times [2019-10-15 01:09:36,290 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:36,290 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301494994] [2019-10-15 01:09:36,290 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:36,291 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:36,291 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:36,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:36,488 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 01:09:36,488 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301494994] [2019-10-15 01:09:36,488 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132991545] [2019-10-15 01:09:36,488 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 01:09:37,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:37,267 INFO L256 TraceCheckSpWp]: Trace formula consists of 3184 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:37,271 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:37,309 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 01:09:37,309 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:37,522 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 01:09:37,522 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:37,523 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-10-15 01:09:37,523 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054781619] [2019-10-15 01:09:37,523 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:37,524 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:37,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:37,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-10-15 01:09:37,524 INFO L87 Difference]: Start difference. First operand 654 states and 1024 transitions. Second operand 4 states. [2019-10-15 01:09:37,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:37,751 INFO L93 Difference]: Finished difference Result 1306 states and 2069 transitions. [2019-10-15 01:09:37,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:09:37,751 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 129 [2019-10-15 01:09:37,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:37,758 INFO L225 Difference]: With dead ends: 1306 [2019-10-15 01:09:37,758 INFO L226 Difference]: Without dead ends: 693 [2019-10-15 01:09:37,762 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 01:09:37,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2019-10-15 01:09:37,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 693. [2019-10-15 01:09:37,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 693 states. [2019-10-15 01:09:37,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 1088 transitions. [2019-10-15 01:09:37,786 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 1088 transitions. Word has length 129 [2019-10-15 01:09:37,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:37,787 INFO L462 AbstractCegarLoop]: Abstraction has 693 states and 1088 transitions. [2019-10-15 01:09:37,787 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:37,787 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 1088 transitions. [2019-10-15 01:09:37,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-10-15 01:09:37,790 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:37,790 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 01:09:38,007 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:38,007 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:38,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:38,008 INFO L82 PathProgramCache]: Analyzing trace with hash 999739231, now seen corresponding path program 1 times [2019-10-15 01:09:38,008 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:38,009 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642204972] [2019-10-15 01:09:38,009 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:38,009 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:38,010 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:38,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:38,178 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 01:09:38,179 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642204972] [2019-10-15 01:09:38,179 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441060066] [2019-10-15 01:09:38,179 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 01:09:38,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:38,898 INFO L256 TraceCheckSpWp]: Trace formula consists of 3185 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:38,901 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:38,940 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 01:09:38,940 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:39,152 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 01:09:39,153 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:39,153 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-10-15 01:09:39,153 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232933479] [2019-10-15 01:09:39,154 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:39,154 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:39,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:39,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-10-15 01:09:39,155 INFO L87 Difference]: Start difference. First operand 693 states and 1088 transitions. Second operand 4 states. [2019-10-15 01:09:39,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:39,348 INFO L93 Difference]: Finished difference Result 1309 states and 2072 transitions. [2019-10-15 01:09:39,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:09:39,348 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 130 [2019-10-15 01:09:39,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:39,354 INFO L225 Difference]: With dead ends: 1309 [2019-10-15 01:09:39,354 INFO L226 Difference]: Without dead ends: 693 [2019-10-15 01:09:39,357 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 01:09:39,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2019-10-15 01:09:39,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 693. [2019-10-15 01:09:39,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 693 states. [2019-10-15 01:09:39,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 1083 transitions. [2019-10-15 01:09:39,380 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 1083 transitions. Word has length 130 [2019-10-15 01:09:39,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:39,381 INFO L462 AbstractCegarLoop]: Abstraction has 693 states and 1083 transitions. [2019-10-15 01:09:39,381 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:39,381 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 1083 transitions. [2019-10-15 01:09:39,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-10-15 01:09:39,383 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:39,383 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 01:09:39,599 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:39,600 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:39,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:39,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1612034594, now seen corresponding path program 1 times [2019-10-15 01:09:39,600 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:39,601 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51331359] [2019-10-15 01:09:39,601 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:39,601 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:39,602 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:39,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:39,732 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 01:09:39,733 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51331359] [2019-10-15 01:09:39,733 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832498264] [2019-10-15 01:09:39,733 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 01:09:40,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:40,482 INFO L256 TraceCheckSpWp]: Trace formula consists of 3181 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-15 01:09:40,486 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:40,584 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 01:09:40,584 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:41,007 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:09:41,119 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 01:09:41,120 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:41,120 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 9] total 16 [2019-10-15 01:09:41,121 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930064742] [2019-10-15 01:09:41,121 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-15 01:09:41,122 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:41,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-15 01:09:41,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2019-10-15 01:09:41,123 INFO L87 Difference]: Start difference. First operand 693 states and 1083 transitions. Second operand 9 states. [2019-10-15 01:09:41,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:41,446 INFO L93 Difference]: Finished difference Result 1322 states and 2086 transitions. [2019-10-15 01:09:41,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-15 01:09:41,447 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 130 [2019-10-15 01:09:41,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:41,452 INFO L225 Difference]: With dead ends: 1322 [2019-10-15 01:09:41,452 INFO L226 Difference]: Without dead ends: 709 [2019-10-15 01:09:41,455 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 01:09:41,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2019-10-15 01:09:41,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 702. [2019-10-15 01:09:41,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 702 states. [2019-10-15 01:09:41,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 702 states to 702 states and 1096 transitions. [2019-10-15 01:09:41,489 INFO L78 Accepts]: Start accepts. Automaton has 702 states and 1096 transitions. Word has length 130 [2019-10-15 01:09:41,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:41,490 INFO L462 AbstractCegarLoop]: Abstraction has 702 states and 1096 transitions. [2019-10-15 01:09:41,490 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-15 01:09:41,490 INFO L276 IsEmpty]: Start isEmpty. Operand 702 states and 1096 transitions. [2019-10-15 01:09:41,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-10-15 01:09:41,493 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:41,494 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 01:09:41,702 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:41,702 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:41,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:41,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1873445245, now seen corresponding path program 1 times [2019-10-15 01:09:41,703 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:41,704 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071978708] [2019-10-15 01:09:41,704 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:41,704 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:41,705 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:41,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:41,823 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 01:09:41,824 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071978708] [2019-10-15 01:09:41,824 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590121454] [2019-10-15 01:09:41,824 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 01:09:42,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:42,699 INFO L256 TraceCheckSpWp]: Trace formula consists of 3180 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:09:42,705 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:42,764 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 01:09:42,765 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:43,086 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 01:09:43,086 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:09:43,086 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 13 [2019-10-15 01:09:43,086 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764224224] [2019-10-15 01:09:43,088 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-15 01:09:43,089 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:43,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-15 01:09:43,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2019-10-15 01:09:43,090 INFO L87 Difference]: Start difference. First operand 702 states and 1096 transitions. Second operand 11 states. [2019-10-15 01:09:43,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:43,249 INFO L93 Difference]: Finished difference Result 1260 states and 1988 transitions. [2019-10-15 01:09:43,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-15 01:09:43,250 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 130 [2019-10-15 01:09:43,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:43,256 INFO L225 Difference]: With dead ends: 1260 [2019-10-15 01:09:43,257 INFO L226 Difference]: Without dead ends: 719 [2019-10-15 01:09:43,261 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 01:09:43,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2019-10-15 01:09:43,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 709. [2019-10-15 01:09:43,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 709 states. [2019-10-15 01:09:43,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 709 states to 709 states and 1106 transitions. [2019-10-15 01:09:43,305 INFO L78 Accepts]: Start accepts. Automaton has 709 states and 1106 transitions. Word has length 130 [2019-10-15 01:09:43,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:43,308 INFO L462 AbstractCegarLoop]: Abstraction has 709 states and 1106 transitions. [2019-10-15 01:09:43,308 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-15 01:09:43,308 INFO L276 IsEmpty]: Start isEmpty. Operand 709 states and 1106 transitions. [2019-10-15 01:09:43,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-10-15 01:09:43,311 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:43,311 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:43,521 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:43,522 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:43,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:43,523 INFO L82 PathProgramCache]: Analyzing trace with hash -892585654, now seen corresponding path program 1 times [2019-10-15 01:09:43,523 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:43,524 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125818541] [2019-10-15 01:09:43,524 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:43,524 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:43,524 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:43,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:43,622 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 01:09:43,623 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125818541] [2019-10-15 01:09:43,623 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574428590] [2019-10-15 01:09:43,623 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 01:09:44,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:44,357 INFO L256 TraceCheckSpWp]: Trace formula consists of 3181 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:09:44,360 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:44,404 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 01:09:44,404 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:44,718 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 01:09:44,719 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:09:44,719 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 10 [2019-10-15 01:09:44,720 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941819613] [2019-10-15 01:09:44,722 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-15 01:09:44,722 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:44,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-15 01:09:44,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-10-15 01:09:44,723 INFO L87 Difference]: Start difference. First operand 709 states and 1106 transitions. Second operand 8 states. [2019-10-15 01:09:44,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:44,897 INFO L93 Difference]: Finished difference Result 1264 states and 1997 transitions. [2019-10-15 01:09:44,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:09:44,898 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 131 [2019-10-15 01:09:44,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:44,905 INFO L225 Difference]: With dead ends: 1264 [2019-10-15 01:09:44,906 INFO L226 Difference]: Without dead ends: 723 [2019-10-15 01:09:44,911 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 253 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 01:09:44,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2019-10-15 01:09:44,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 716. [2019-10-15 01:09:44,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 716 states. [2019-10-15 01:09:44,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1117 transitions. [2019-10-15 01:09:44,952 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1117 transitions. Word has length 131 [2019-10-15 01:09:44,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:44,952 INFO L462 AbstractCegarLoop]: Abstraction has 716 states and 1117 transitions. [2019-10-15 01:09:44,952 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-15 01:09:44,953 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1117 transitions. [2019-10-15 01:09:44,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-10-15 01:09:44,956 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:44,957 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 01:09:45,169 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:45,169 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:45,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:45,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1417743562, now seen corresponding path program 1 times [2019-10-15 01:09:45,170 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:45,170 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476693524] [2019-10-15 01:09:45,170 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:45,170 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:45,172 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:45,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:45,348 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 01:09:45,349 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476693524] [2019-10-15 01:09:45,349 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170447563] [2019-10-15 01:09:45,350 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 01:09:46,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:46,301 INFO L256 TraceCheckSpWp]: Trace formula consists of 3177 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-15 01:09:46,305 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:46,391 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 01:09:46,392 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:46,711 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:09:46,845 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 01:09:46,846 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:09:46,846 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [4] total 16 [2019-10-15 01:09:46,846 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176220865] [2019-10-15 01:09:46,847 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-15 01:09:46,847 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:46,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-15 01:09:46,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2019-10-15 01:09:46,848 INFO L87 Difference]: Start difference. First operand 716 states and 1117 transitions. Second operand 14 states. [2019-10-15 01:09:47,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:47,107 INFO L93 Difference]: Finished difference Result 1265 states and 1997 transitions. [2019-10-15 01:09:47,107 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-15 01:09:47,108 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 131 [2019-10-15 01:09:47,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:47,114 INFO L225 Difference]: With dead ends: 1265 [2019-10-15 01:09:47,114 INFO L226 Difference]: Without dead ends: 724 [2019-10-15 01:09:47,118 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 01:09:47,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2019-10-15 01:09:47,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 716. [2019-10-15 01:09:47,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 716 states. [2019-10-15 01:09:47,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1117 transitions. [2019-10-15 01:09:47,221 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1117 transitions. Word has length 131 [2019-10-15 01:09:47,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:47,221 INFO L462 AbstractCegarLoop]: Abstraction has 716 states and 1117 transitions. [2019-10-15 01:09:47,221 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-15 01:09:47,221 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1117 transitions. [2019-10-15 01:09:47,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-10-15 01:09:47,224 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:47,224 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] [2019-10-15 01:09:47,432 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:47,432 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:47,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:47,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1260335984, now seen corresponding path program 1 times [2019-10-15 01:09:47,433 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:47,433 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499393340] [2019-10-15 01:09:47,434 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:47,434 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:47,434 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:47,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:47,527 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 01:09:47,528 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499393340] [2019-10-15 01:09:47,528 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358150040] [2019-10-15 01:09:47,528 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 01:09:48,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:48,265 INFO L256 TraceCheckSpWp]: Trace formula consists of 3183 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:48,268 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:48,289 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 01:09:48,289 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:48,499 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 01:09:48,499 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:48,500 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-15 01:09:48,500 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195785691] [2019-10-15 01:09:48,501 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:48,501 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:48,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:48,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:09:48,502 INFO L87 Difference]: Start difference. First operand 716 states and 1117 transitions. Second operand 4 states. [2019-10-15 01:09:48,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:48,719 INFO L93 Difference]: Finished difference Result 1351 states and 2131 transitions. [2019-10-15 01:09:48,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:09:48,719 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 133 [2019-10-15 01:09:48,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:48,725 INFO L225 Difference]: With dead ends: 1351 [2019-10-15 01:09:48,725 INFO L226 Difference]: Without dead ends: 716 [2019-10-15 01:09:48,729 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 262 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:09:48,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2019-10-15 01:09:48,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 716. [2019-10-15 01:09:48,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 716 states. [2019-10-15 01:09:48,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1112 transitions. [2019-10-15 01:09:48,755 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1112 transitions. Word has length 133 [2019-10-15 01:09:48,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:48,756 INFO L462 AbstractCegarLoop]: Abstraction has 716 states and 1112 transitions. [2019-10-15 01:09:48,756 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:48,756 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1112 transitions. [2019-10-15 01:09:48,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-10-15 01:09:48,758 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:48,759 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 01:09:48,967 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:48,968 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:48,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:48,968 INFO L82 PathProgramCache]: Analyzing trace with hash 399075328, now seen corresponding path program 1 times [2019-10-15 01:09:48,969 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:48,969 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898889565] [2019-10-15 01:09:48,969 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:48,969 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:48,969 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:49,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:49,081 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 01:09:49,081 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898889565] [2019-10-15 01:09:49,081 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922977882] [2019-10-15 01:09:49,081 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 01:09:49,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:49,822 INFO L256 TraceCheckSpWp]: Trace formula consists of 3178 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-15 01:09:49,825 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:49,964 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 01:09:49,964 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:50,287 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:09:50,399 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 01:09:50,400 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:09:50,400 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [4] total 13 [2019-10-15 01:09:50,400 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650664424] [2019-10-15 01:09:50,401 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-15 01:09:50,401 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:50,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-15 01:09:50,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2019-10-15 01:09:50,402 INFO L87 Difference]: Start difference. First operand 716 states and 1112 transitions. Second operand 11 states. [2019-10-15 01:09:50,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:50,602 INFO L93 Difference]: Finished difference Result 1266 states and 2000 transitions. [2019-10-15 01:09:50,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-15 01:09:50,603 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 132 [2019-10-15 01:09:50,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:50,609 INFO L225 Difference]: With dead ends: 1266 [2019-10-15 01:09:50,609 INFO L226 Difference]: Without dead ends: 725 [2019-10-15 01:09:50,613 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 251 SyntacticMatches, 7 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2019-10-15 01:09:50,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2019-10-15 01:09:50,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 718. [2019-10-15 01:09:50,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 718 states. [2019-10-15 01:09:50,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 1118 transitions. [2019-10-15 01:09:50,640 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 1118 transitions. Word has length 132 [2019-10-15 01:09:50,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:50,641 INFO L462 AbstractCegarLoop]: Abstraction has 718 states and 1118 transitions. [2019-10-15 01:09:50,641 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-15 01:09:50,641 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 1118 transitions. [2019-10-15 01:09:50,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-10-15 01:09:50,645 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:50,646 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:50,860 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:50,861 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:50,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:50,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1558329253, now seen corresponding path program 1 times [2019-10-15 01:09:50,862 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:50,863 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639065654] [2019-10-15 01:09:50,863 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:50,863 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:50,864 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:50,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:50,952 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 01:09:50,952 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639065654] [2019-10-15 01:09:50,953 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726004651] [2019-10-15 01:09:50,953 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 01:09:51,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:51,684 INFO L256 TraceCheckSpWp]: Trace formula consists of 3179 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-15 01:09:51,688 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:51,721 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:09:51,722 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:51,934 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:09:52,013 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:09:52,013 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:09:52,013 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [4] total 11 [2019-10-15 01:09:52,014 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901245659] [2019-10-15 01:09:52,014 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-15 01:09:52,014 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:52,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-15 01:09:52,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2019-10-15 01:09:52,015 INFO L87 Difference]: Start difference. First operand 718 states and 1118 transitions. Second operand 9 states. [2019-10-15 01:09:52,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:52,145 INFO L93 Difference]: Finished difference Result 1362 states and 2165 transitions. [2019-10-15 01:09:52,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:09:52,145 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 133 [2019-10-15 01:09:52,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:52,151 INFO L225 Difference]: With dead ends: 1362 [2019-10-15 01:09:52,151 INFO L226 Difference]: Without dead ends: 727 [2019-10-15 01:09:52,155 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 260 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2019-10-15 01:09:52,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 727 states. [2019-10-15 01:09:52,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 727 to 725. [2019-10-15 01:09:52,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 725 states. [2019-10-15 01:09:52,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 725 states to 725 states and 1126 transitions. [2019-10-15 01:09:52,186 INFO L78 Accepts]: Start accepts. Automaton has 725 states and 1126 transitions. Word has length 133 [2019-10-15 01:09:52,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:52,186 INFO L462 AbstractCegarLoop]: Abstraction has 725 states and 1126 transitions. [2019-10-15 01:09:52,186 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-15 01:09:52,187 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states and 1126 transitions. [2019-10-15 01:09:52,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-10-15 01:09:52,189 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:52,189 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 01:09:52,408 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:52,408 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:52,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:52,409 INFO L82 PathProgramCache]: Analyzing trace with hash 266659145, now seen corresponding path program 1 times [2019-10-15 01:09:52,409 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:52,409 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118083188] [2019-10-15 01:09:52,409 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:52,409 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:52,409 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:52,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:52,493 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 01:09:52,493 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118083188] [2019-10-15 01:09:52,493 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810063173] [2019-10-15 01:09:52,493 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