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_product20.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:08:44,777 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:08:44,780 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:08:44,799 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:08:44,800 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:08:44,802 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:08:44,804 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:08:44,814 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:08:44,818 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:08:44,823 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:08:44,824 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:08:44,826 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:08:44,826 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:08:44,828 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:08:44,831 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:08:44,832 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:08:44,834 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:08:44,836 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:08:44,837 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:08:44,842 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:08:44,847 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:08:44,850 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:08:44,853 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:08:44,854 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:08:44,856 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 01:08:44,856 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 01:08:44,856 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 01:08:44,858 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 01:08:44,859 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 01:08:44,860 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 01:08:44,860 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 01:08:44,861 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 01:08:44,862 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 01:08:44,863 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 01:08:44,864 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 01:08:44,865 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 01:08:44,865 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 01:08:44,866 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 01:08:44,866 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:08:44,867 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:08:44,868 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:08:44,869 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 01:08:44,899 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:08:44,900 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:08:44,901 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:08:44,902 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:08:44,902 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:08:44,902 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:08:44,902 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:08:44,902 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:08:44,903 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:08:44,903 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:08:44,903 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:08:44,903 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:08:44,903 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:08:44,904 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:08:44,904 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:08:44,904 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:08:44,905 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:08:44,906 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:08:44,906 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:08:44,906 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:08:44,906 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:08:44,906 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:08:44,907 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:08:44,907 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:08:44,907 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:08:44,907 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:08:44,907 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:08:44,907 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:08:44,908 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-15 01:08:45,214 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:08:45,232 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:08:45,236 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:08:45,238 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:08:45,238 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:08:45,239 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec1_product20.cil.c [2019-10-15 01:08:45,317 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab95e9061/f7459111c0484045a03d5dc0ea0c5f80/FLAGfb18bcb60 [2019-10-15 01:08:45,995 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:08:45,996 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec1_product20.cil.c [2019-10-15 01:08:46,018 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab95e9061/f7459111c0484045a03d5dc0ea0c5f80/FLAGfb18bcb60 [2019-10-15 01:08:46,151 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab95e9061/f7459111c0484045a03d5dc0ea0c5f80 [2019-10-15 01:08:46,161 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:08:46,162 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:08:46,165 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:08:46,165 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:08:46,169 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:08:46,170 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:08:46" (1/1) ... [2019-10-15 01:08:46,172 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51fe3b84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:46, skipping insertion in model container [2019-10-15 01:08:46,172 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:08:46" (1/1) ... [2019-10-15 01:08:46,179 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:08:46,256 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:08:47,057 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:08:47,080 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:08:47,264 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:08:47,359 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:08:47,359 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:47 WrapperNode [2019-10-15 01:08:47,360 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:08:47,361 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:08:47,361 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:08:47,361 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:08:47,382 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:47" (1/1) ... [2019-10-15 01:08:47,383 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:47" (1/1) ... [2019-10-15 01:08:47,462 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:47" (1/1) ... [2019-10-15 01:08:47,462 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:47" (1/1) ... [2019-10-15 01:08:47,527 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:47" (1/1) ... [2019-10-15 01:08:47,570 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:47" (1/1) ... [2019-10-15 01:08:47,587 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:47" (1/1) ... [2019-10-15 01:08:47,601 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:08:47,602 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:08:47,602 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:08:47,602 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:08:47,603 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:47" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:08:47,716 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:08:47,717 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:08:47,717 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-15 01:08:47,718 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-10-15 01:08:47,718 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-10-15 01:08:47,719 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-10-15 01:08:47,719 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-10-15 01:08:47,719 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-10-15 01:08:47,720 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-10-15 01:08:47,720 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-10-15 01:08:47,720 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-10-15 01:08:47,721 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-10-15 01:08:47,721 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-10-15 01:08:47,722 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-10-15 01:08:47,722 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-10-15 01:08:47,722 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-10-15 01:08:47,725 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-10-15 01:08:47,726 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-10-15 01:08:47,726 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-10-15 01:08:47,726 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2019-10-15 01:08:47,727 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-10-15 01:08:47,728 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-10-15 01:08:47,728 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-10-15 01:08:47,728 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__weight [2019-10-15 01:08:47,728 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-10-15 01:08:47,729 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-10-15 01:08:47,729 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-10-15 01:08:47,729 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2019-10-15 01:08:47,730 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-15 01:08:47,730 INFO L138 BoogieDeclarations]: Found implementation of procedure printState__wrappee__executivefloor [2019-10-15 01:08:47,730 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-10-15 01:08:47,730 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-10-15 01:08:47,731 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2019-10-15 01:08:47,731 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloor [2019-10-15 01:08:47,731 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-15 01:08:47,732 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-15 01:08:47,732 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-15 01:08:47,732 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-15 01:08:47,733 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-15 01:08:47,733 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-15 01:08:47,733 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-15 01:08:47,733 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-15 01:08:47,734 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-15 01:08:47,734 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-15 01:08:47,734 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-15 01:08:47,735 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-15 01:08:47,735 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-10-15 01:08:47,735 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-10-15 01:08:47,735 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-10-15 01:08:47,736 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-10-15 01:08:47,736 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-10-15 01:08:47,736 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-10-15 01:08:47,736 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-10-15 01:08:47,737 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-10-15 01:08:47,737 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-10-15 01:08:47,737 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-10-15 01:08:47,737 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-10-15 01:08:47,738 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-10-15 01:08:47,738 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-10-15 01:08:47,738 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-10-15 01:08:47,738 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-10-15 01:08:47,739 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-10-15 01:08:47,739 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-10-15 01:08:47,740 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-10-15 01:08:47,740 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-15 01:08:47,740 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-10-15 01:08:47,740 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-10-15 01:08:47,741 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-10-15 01:08:47,741 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-15 01:08:47,741 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-10-15 01:08:47,741 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-15 01:08:47,742 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-15 01:08:47,742 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:08:47,743 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2019-10-15 01:08:47,743 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__2 [2019-10-15 01:08:47,744 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__3 [2019-10-15 01:08:47,744 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__4 [2019-10-15 01:08:47,744 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-10-15 01:08:47,744 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-10-15 01:08:47,745 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-10-15 01:08:47,746 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:08:47,746 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:08:47,746 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-15 01:08:47,747 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-10-15 01:08:47,747 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-10-15 01:08:47,748 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-10-15 01:08:47,748 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-10-15 01:08:47,750 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-10-15 01:08:47,750 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-10-15 01:08:47,750 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-10-15 01:08:47,750 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-10-15 01:08:47,751 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-10-15 01:08:47,751 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-15 01:08:47,751 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-10-15 01:08:47,752 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-10-15 01:08:47,752 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-10-15 01:08:47,752 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-10-15 01:08:47,752 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-10-15 01:08:47,753 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-10-15 01:08:47,753 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-10-15 01:08:47,753 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-10-15 01:08:47,753 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-10-15 01:08:47,754 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-10-15 01:08:47,754 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2019-10-15 01:08:47,754 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloor [2019-10-15 01:08:47,754 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-10-15 01:08:47,755 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-10-15 01:08:47,755 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-10-15 01:08:47,755 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-10-15 01:08:47,755 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-10-15 01:08:47,756 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-10-15 01:08:47,756 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-10-15 01:08:47,756 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2019-10-15 01:08:47,757 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-10-15 01:08:47,757 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-10-15 01:08:47,757 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__weight [2019-10-15 01:08:47,757 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-10-15 01:08:47,758 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-10-15 01:08:47,758 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-10-15 01:08:47,759 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2019-10-15 01:08:47,759 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__3 [2019-10-15 01:08:47,759 INFO L130 BoogieDeclarations]: Found specification of procedure printState__wrappee__executivefloor [2019-10-15 01:08:47,760 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:08:47,760 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-10-15 01:08:47,761 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-15 01:08:47,761 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-15 01:08:47,762 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-15 01:08:47,762 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-15 01:08:47,762 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-15 01:08:47,762 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-15 01:08:47,763 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:08:47,763 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-15 01:08:47,764 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-15 01:08:47,764 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:08:47,764 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-15 01:08:47,765 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-15 01:08:47,766 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:08:47,771 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-15 01:08:47,771 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-15 01:08:47,771 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-15 01:08:47,772 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-10-15 01:08:47,773 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-10-15 01:08:47,773 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-15 01:08:47,774 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-15 01:08:47,784 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-15 01:08:47,784 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-15 01:08:47,785 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-15 01:08:47,785 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-15 01:08:47,785 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-15 01:08:47,785 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-10-15 01:08:47,786 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-10-15 01:08:47,786 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-10-15 01:08:47,786 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-10-15 01:08:47,787 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-10-15 01:08:47,787 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__2 [2019-10-15 01:08:47,787 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:08:47,787 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-10-15 01:08:47,788 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-10-15 01:08:47,788 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-10-15 01:08:47,788 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-10-15 01:08:47,788 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-10-15 01:08:47,789 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-10-15 01:08:47,789 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-10-15 01:08:47,789 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-10-15 01:08:47,789 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-10-15 01:08:47,790 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-15 01:08:47,790 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-10-15 01:08:47,790 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-15 01:08:47,790 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2019-10-15 01:08:47,791 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__4 [2019-10-15 01:08:47,791 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-15 01:08:47,791 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:08:47,791 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:08:47,792 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-15 01:08:47,792 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:08:50,285 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:08:50,285 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-15 01:08:50,288 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:08:50 BoogieIcfgContainer [2019-10-15 01:08:50,288 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:08:50,291 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:08:50,291 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:08:50,295 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:08:50,295 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:08:46" (1/3) ... [2019-10-15 01:08:50,296 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@417b1e5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:08:50, skipping insertion in model container [2019-10-15 01:08:50,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:47" (2/3) ... [2019-10-15 01:08:50,297 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@417b1e5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:08:50, skipping insertion in model container [2019-10-15 01:08:50,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:08:50" (3/3) ... [2019-10-15 01:08:50,299 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product20.cil.c [2019-10-15 01:08:50,310 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:08:50,320 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:08:50,332 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:08:50,374 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:08:50,375 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:08:50,375 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:08:50,375 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:08:50,375 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:08:50,375 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:08:50,375 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:08:50,375 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:08:50,422 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states. [2019-10-15 01:08:50,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-10-15 01:08:50,457 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:50,460 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:08:50,464 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:50,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:50,471 INFO L82 PathProgramCache]: Analyzing trace with hash 669576515, now seen corresponding path program 1 times [2019-10-15 01:08:50,483 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:50,483 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440965905] [2019-10-15 01:08:50,483 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:50,484 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:50,484 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:51,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:51,222 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:08:51,223 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440965905] [2019-10-15 01:08:51,223 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104837536] [2019-10-15 01:08:51,224 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:51,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:51,933 INFO L256 TraceCheckSpWp]: Trace formula consists of 3176 conjuncts, 1 conjunts are in the unsatisfiable core [2019-10-15 01:08:51,950 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:51,990 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:08:51,990 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:52,184 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:08:52,185 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:08:52,185 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [4] total 4 [2019-10-15 01:08:52,185 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526846821] [2019-10-15 01:08:52,192 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-15 01:08:52,193 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:52,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-15 01:08:52,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:08:52,211 INFO L87 Difference]: Start difference. First operand 787 states. Second operand 2 states. [2019-10-15 01:08:52,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:52,291 INFO L93 Difference]: Finished difference Result 663 states and 1051 transitions. [2019-10-15 01:08:52,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-15 01:08:52,295 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 116 [2019-10-15 01:08:52,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:52,340 INFO L225 Difference]: With dead ends: 663 [2019-10-15 01:08:52,340 INFO L226 Difference]: Without dead ends: 626 [2019-10-15 01:08:52,347 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:08:52,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2019-10-15 01:08:52,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 626. [2019-10-15 01:08:52,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 626 states. [2019-10-15 01:08:52,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 996 transitions. [2019-10-15 01:08:52,487 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 996 transitions. Word has length 116 [2019-10-15 01:08:52,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:52,489 INFO L462 AbstractCegarLoop]: Abstraction has 626 states and 996 transitions. [2019-10-15 01:08:52,489 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-15 01:08:52,490 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 996 transitions. [2019-10-15 01:08:52,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-10-15 01:08:52,494 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:52,494 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:08:52,704 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:52,705 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:52,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:52,706 INFO L82 PathProgramCache]: Analyzing trace with hash 835424246, now seen corresponding path program 1 times [2019-10-15 01:08:52,707 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:52,707 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887249624] [2019-10-15 01:08:52,708 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:52,708 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:52,708 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:52,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:52,983 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:08:52,983 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887249624] [2019-10-15 01:08:52,984 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163798626] [2019-10-15 01:08:52,984 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:53,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:53,591 INFO L256 TraceCheckSpWp]: Trace formula consists of 3179 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:08:53,613 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:53,662 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:08:53,663 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:53,892 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:08:53,892 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:08:53,893 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-15 01:08:53,896 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416573061] [2019-10-15 01:08:53,899 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:08:53,899 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:53,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:08:53,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:08:53,900 INFO L87 Difference]: Start difference. First operand 626 states and 996 transitions. Second operand 4 states. [2019-10-15 01:08:54,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:54,069 INFO L93 Difference]: Finished difference Result 1224 states and 1965 transitions. [2019-10-15 01:08:54,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:08:54,070 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 118 [2019-10-15 01:08:54,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:54,081 INFO L225 Difference]: With dead ends: 1224 [2019-10-15 01:08:54,082 INFO L226 Difference]: Without dead ends: 626 [2019-10-15 01:08:54,091 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 232 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:08:54,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2019-10-15 01:08:54,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 626. [2019-10-15 01:08:54,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 626 states. [2019-10-15 01:08:54,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 995 transitions. [2019-10-15 01:08:54,167 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 995 transitions. Word has length 118 [2019-10-15 01:08:54,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:54,168 INFO L462 AbstractCegarLoop]: Abstraction has 626 states and 995 transitions. [2019-10-15 01:08:54,168 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:08:54,168 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 995 transitions. [2019-10-15 01:08:54,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-10-15 01:08:54,172 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:54,172 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:08:54,381 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:54,381 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:54,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:54,382 INFO L82 PathProgramCache]: Analyzing trace with hash 963635798, now seen corresponding path program 1 times [2019-10-15 01:08:54,382 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:54,383 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920588664] [2019-10-15 01:08:54,383 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:54,383 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:54,383 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:54,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:54,567 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:08:54,567 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920588664] [2019-10-15 01:08:54,568 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445907530] [2019-10-15 01:08:54,568 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 01:08:55,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:55,277 INFO L256 TraceCheckSpWp]: Trace formula consists of 3181 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:08:55,294 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:55,326 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 01:08:55,326 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:55,517 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:08:55,518 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:08:55,518 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-15 01:08:55,518 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868477128] [2019-10-15 01:08:55,519 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:08:55,519 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:55,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:08:55,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:08:55,520 INFO L87 Difference]: Start difference. First operand 626 states and 995 transitions. Second operand 4 states. [2019-10-15 01:08:55,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:55,593 INFO L93 Difference]: Finished difference Result 1224 states and 1963 transitions. [2019-10-15 01:08:55,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:08:55,593 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 120 [2019-10-15 01:08:55,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:55,598 INFO L225 Difference]: With dead ends: 1224 [2019-10-15 01:08:55,598 INFO L226 Difference]: Without dead ends: 626 [2019-10-15 01:08:55,601 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 01:08:55,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2019-10-15 01:08:55,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 626. [2019-10-15 01:08:55,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 626 states. [2019-10-15 01:08:55,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 994 transitions. [2019-10-15 01:08:55,628 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 994 transitions. Word has length 120 [2019-10-15 01:08:55,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:55,629 INFO L462 AbstractCegarLoop]: Abstraction has 626 states and 994 transitions. [2019-10-15 01:08:55,629 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:08:55,629 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 994 transitions. [2019-10-15 01:08:55,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-10-15 01:08:55,631 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:55,632 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:08:55,839 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:55,840 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:55,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:55,840 INFO L82 PathProgramCache]: Analyzing trace with hash 684702014, now seen corresponding path program 1 times [2019-10-15 01:08:55,841 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:55,841 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840313506] [2019-10-15 01:08:55,841 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:55,841 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:55,841 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:55,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:55,968 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 01:08:55,968 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840313506] [2019-10-15 01:08:55,968 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112099840] [2019-10-15 01:08:55,969 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 01:08:56,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:56,580 INFO L256 TraceCheckSpWp]: Trace formula consists of 3183 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:08:56,586 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:56,620 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 01:08:56,620 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:56,940 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 01:08:56,941 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:08:56,941 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-15 01:08:56,941 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490646876] [2019-10-15 01:08:56,942 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:08:56,942 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:56,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:08:56,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:08:56,944 INFO L87 Difference]: Start difference. First operand 626 states and 994 transitions. Second operand 4 states. [2019-10-15 01:08:57,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:57,034 INFO L93 Difference]: Finished difference Result 1231 states and 1970 transitions. [2019-10-15 01:08:57,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:08:57,035 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 122 [2019-10-15 01:08:57,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:57,040 INFO L225 Difference]: With dead ends: 1231 [2019-10-15 01:08:57,040 INFO L226 Difference]: Without dead ends: 635 [2019-10-15 01:08:57,043 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 01:08:57,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2019-10-15 01:08:57,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 635. [2019-10-15 01:08:57,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 635 states. [2019-10-15 01:08:57,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 1006 transitions. [2019-10-15 01:08:57,069 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 1006 transitions. Word has length 122 [2019-10-15 01:08:57,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:57,069 INFO L462 AbstractCegarLoop]: Abstraction has 635 states and 1006 transitions. [2019-10-15 01:08:57,069 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:08:57,070 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 1006 transitions. [2019-10-15 01:08:57,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-10-15 01:08:57,072 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:57,072 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 01:08:57,282 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:57,282 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:57,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:57,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1568855861, now seen corresponding path program 1 times [2019-10-15 01:08:57,283 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:57,283 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896862310] [2019-10-15 01:08:57,283 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:57,283 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:57,283 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:57,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:57,388 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 01:08:57,388 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896862310] [2019-10-15 01:08:57,389 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430643177] [2019-10-15 01:08:57,389 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 01:08:57,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:57,954 INFO L256 TraceCheckSpWp]: Trace formula consists of 3184 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:08:57,960 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:57,997 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 01:08:57,997 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:58,245 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 01:08:58,246 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:08:58,246 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-15 01:08:58,248 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199693201] [2019-10-15 01:08:58,249 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:08:58,249 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:58,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:08:58,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:08:58,250 INFO L87 Difference]: Start difference. First operand 635 states and 1006 transitions. Second operand 4 states. [2019-10-15 01:08:58,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:58,334 INFO L93 Difference]: Finished difference Result 1233 states and 1971 transitions. [2019-10-15 01:08:58,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:08:58,335 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 123 [2019-10-15 01:08:58,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:58,340 INFO L225 Difference]: With dead ends: 1233 [2019-10-15 01:08:58,340 INFO L226 Difference]: Without dead ends: 635 [2019-10-15 01:08:58,343 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 01:08:58,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2019-10-15 01:08:58,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 635. [2019-10-15 01:08:58,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 635 states. [2019-10-15 01:08:58,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 1005 transitions. [2019-10-15 01:08:58,367 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 1005 transitions. Word has length 123 [2019-10-15 01:08:58,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:58,367 INFO L462 AbstractCegarLoop]: Abstraction has 635 states and 1005 transitions. [2019-10-15 01:08:58,368 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:08:58,368 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 1005 transitions. [2019-10-15 01:08:58,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-10-15 01:08:58,370 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:58,370 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 01:08:58,586 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:58,586 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:58,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:58,587 INFO L82 PathProgramCache]: Analyzing trace with hash 43826914, now seen corresponding path program 1 times [2019-10-15 01:08:58,587 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:58,587 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109258835] [2019-10-15 01:08:58,588 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:58,588 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:58,588 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:58,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:58,691 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 01:08:58,691 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109258835] [2019-10-15 01:08:58,691 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698464503] [2019-10-15 01:08:58,692 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 01:08:59,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:59,543 INFO L256 TraceCheckSpWp]: Trace formula consists of 3185 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:08:59,553 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:59,592 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 01:08:59,592 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:59,837 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 01:08:59,838 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:08:59,838 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-15 01:08:59,838 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784019609] [2019-10-15 01:08:59,840 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:08:59,842 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:59,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:08:59,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:08:59,844 INFO L87 Difference]: Start difference. First operand 635 states and 1005 transitions. Second operand 4 states. [2019-10-15 01:08:59,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:59,992 INFO L93 Difference]: Finished difference Result 1233 states and 1970 transitions. [2019-10-15 01:08:59,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:08:59,993 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 124 [2019-10-15 01:08:59,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:00,009 INFO L225 Difference]: With dead ends: 1233 [2019-10-15 01:09:00,009 INFO L226 Difference]: Without dead ends: 635 [2019-10-15 01:09:00,015 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 01:09:00,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2019-10-15 01:09:00,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 635. [2019-10-15 01:09:00,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 635 states. [2019-10-15 01:09:00,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 1004 transitions. [2019-10-15 01:09:00,040 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 1004 transitions. Word has length 124 [2019-10-15 01:09:00,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:00,040 INFO L462 AbstractCegarLoop]: Abstraction has 635 states and 1004 transitions. [2019-10-15 01:09:00,040 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:00,040 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 1004 transitions. [2019-10-15 01:09:00,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-10-15 01:09:00,043 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:00,044 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 01:09:00,252 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:00,252 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:00,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:00,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1250885551, now seen corresponding path program 1 times [2019-10-15 01:09:00,253 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:00,253 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188152886] [2019-10-15 01:09:00,253 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:00,253 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:00,253 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:00,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:00,423 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 01:09:00,423 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188152886] [2019-10-15 01:09:00,423 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684271299] [2019-10-15 01:09:00,424 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 01:09:00,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:01,007 INFO L256 TraceCheckSpWp]: Trace formula consists of 3186 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:09:01,014 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:01,103 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 01:09:01,103 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:01,451 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 01:09:01,451 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:01,451 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10, 7] total 16 [2019-10-15 01:09:01,452 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634899654] [2019-10-15 01:09:01,452 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-15 01:09:01,453 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:01,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-15 01:09:01,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2019-10-15 01:09:01,454 INFO L87 Difference]: Start difference. First operand 635 states and 1004 transitions. Second operand 7 states. [2019-10-15 01:09:01,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:01,631 INFO L93 Difference]: Finished difference Result 1240 states and 1979 transitions. [2019-10-15 01:09:01,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:09:01,632 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 125 [2019-10-15 01:09:01,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:01,637 INFO L225 Difference]: With dead ends: 1240 [2019-10-15 01:09:01,638 INFO L226 Difference]: Without dead ends: 646 [2019-10-15 01:09:01,641 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 242 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2019-10-15 01:09:01,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2019-10-15 01:09:01,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 642. [2019-10-15 01:09:01,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 642 states. [2019-10-15 01:09:01,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 1014 transitions. [2019-10-15 01:09:01,667 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 1014 transitions. Word has length 125 [2019-10-15 01:09:01,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:01,669 INFO L462 AbstractCegarLoop]: Abstraction has 642 states and 1014 transitions. [2019-10-15 01:09:01,669 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-15 01:09:01,669 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 1014 transitions. [2019-10-15 01:09:01,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-10-15 01:09:01,672 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:01,672 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 01:09:01,887 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:01,887 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:01,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:01,888 INFO L82 PathProgramCache]: Analyzing trace with hash 865518768, now seen corresponding path program 1 times [2019-10-15 01:09:01,888 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:01,889 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287386181] [2019-10-15 01:09:01,889 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:01,889 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:01,890 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:01,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:01,993 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:09:01,994 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287386181] [2019-10-15 01:09:01,994 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297731020] [2019-10-15 01:09:01,994 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 01:09:02,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:02,635 INFO L256 TraceCheckSpWp]: Trace formula consists of 3185 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:02,639 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:02,667 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 01:09:02,667 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:02,877 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:09:02,877 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:02,878 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-15 01:09:02,878 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513770741] [2019-10-15 01:09:02,879 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:02,879 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:02,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:02,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:09:02,880 INFO L87 Difference]: Start difference. First operand 642 states and 1014 transitions. Second operand 4 states. [2019-10-15 01:09:03,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:03,042 INFO L93 Difference]: Finished difference Result 1245 states and 1990 transitions. [2019-10-15 01:09:03,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:09:03,043 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 125 [2019-10-15 01:09:03,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:03,048 INFO L225 Difference]: With dead ends: 1245 [2019-10-15 01:09:03,048 INFO L226 Difference]: Without dead ends: 642 [2019-10-15 01:09:03,053 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 246 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:09:03,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2019-10-15 01:09:03,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 642. [2019-10-15 01:09:03,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 642 states. [2019-10-15 01:09:03,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 1009 transitions. [2019-10-15 01:09:03,084 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 1009 transitions. Word has length 125 [2019-10-15 01:09:03,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:03,084 INFO L462 AbstractCegarLoop]: Abstraction has 642 states and 1009 transitions. [2019-10-15 01:09:03,085 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:03,085 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 1009 transitions. [2019-10-15 01:09:03,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-10-15 01:09:03,088 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:03,088 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] [2019-10-15 01:09:03,294 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:03,295 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:03,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:03,296 INFO L82 PathProgramCache]: Analyzing trace with hash -162638701, now seen corresponding path program 1 times [2019-10-15 01:09:03,296 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:03,296 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486357765] [2019-10-15 01:09:03,297 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:03,297 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:03,297 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:03,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:03,442 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-15 01:09:03,443 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486357765] [2019-10-15 01:09:03,443 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518717140] [2019-10-15 01:09:03,443 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 01:09:04,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:04,127 INFO L256 TraceCheckSpWp]: Trace formula consists of 3189 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:04,133 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:04,165 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 01:09:04,165 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:04,367 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 01:09:04,368 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:04,368 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 10 [2019-10-15 01:09:04,368 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781146208] [2019-10-15 01:09:04,369 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:04,369 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:04,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:04,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-10-15 01:09:04,369 INFO L87 Difference]: Start difference. First operand 642 states and 1009 transitions. Second operand 4 states. [2019-10-15 01:09:04,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:04,530 INFO L93 Difference]: Finished difference Result 1245 states and 1980 transitions. [2019-10-15 01:09:04,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:09:04,531 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 128 [2019-10-15 01:09:04,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:04,536 INFO L225 Difference]: With dead ends: 1245 [2019-10-15 01:09:04,536 INFO L226 Difference]: Without dead ends: 642 [2019-10-15 01:09:04,541 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 253 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2019-10-15 01:09:04,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2019-10-15 01:09:04,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 642. [2019-10-15 01:09:04,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 642 states. [2019-10-15 01:09:04,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 1004 transitions. [2019-10-15 01:09:04,571 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 1004 transitions. Word has length 128 [2019-10-15 01:09:04,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:04,572 INFO L462 AbstractCegarLoop]: Abstraction has 642 states and 1004 transitions. [2019-10-15 01:09:04,572 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:04,572 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 1004 transitions. [2019-10-15 01:09:04,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-10-15 01:09:04,576 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:04,576 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 01:09:04,789 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:04,789 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:04,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:04,789 INFO L82 PathProgramCache]: Analyzing trace with hash 2001392257, now seen corresponding path program 1 times [2019-10-15 01:09:04,790 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:04,790 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073448178] [2019-10-15 01:09:04,790 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:04,790 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:04,790 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:04,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:04,918 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-15 01:09:04,918 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073448178] [2019-10-15 01:09:04,918 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713242496] [2019-10-15 01:09:04,919 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 01:09:05,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:05,803 INFO L256 TraceCheckSpWp]: Trace formula consists of 3191 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:05,807 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:05,837 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 01:09:05,837 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:06,026 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 01:09:06,027 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:06,027 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 10 [2019-10-15 01:09:06,027 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703020844] [2019-10-15 01:09:06,027 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:06,028 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:06,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:06,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-10-15 01:09:06,028 INFO L87 Difference]: Start difference. First operand 642 states and 1004 transitions. Second operand 4 states. [2019-10-15 01:09:06,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:06,226 INFO L93 Difference]: Finished difference Result 1281 states and 2028 transitions. [2019-10-15 01:09:06,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:09:06,227 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 130 [2019-10-15 01:09:06,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:06,232 INFO L225 Difference]: With dead ends: 1281 [2019-10-15 01:09:06,232 INFO L226 Difference]: Without dead ends: 684 [2019-10-15 01:09:06,236 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 257 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2019-10-15 01:09:06,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2019-10-15 01:09:06,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 681. [2019-10-15 01:09:06,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 681 states. [2019-10-15 01:09:06,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 1067 transitions. [2019-10-15 01:09:06,262 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 1067 transitions. Word has length 130 [2019-10-15 01:09:06,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:06,262 INFO L462 AbstractCegarLoop]: Abstraction has 681 states and 1067 transitions. [2019-10-15 01:09:06,262 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:06,262 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 1067 transitions. [2019-10-15 01:09:06,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-10-15 01:09:06,265 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:06,265 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 01:09:06,474 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:06,475 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:06,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:06,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1601209857, now seen corresponding path program 1 times [2019-10-15 01:09:06,476 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:06,476 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653935561] [2019-10-15 01:09:06,477 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:06,477 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:06,477 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:06,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:06,596 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 01:09:06,597 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653935561] [2019-10-15 01:09:06,597 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215656476] [2019-10-15 01:09:06,597 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 01:09:07,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:07,271 INFO L256 TraceCheckSpWp]: Trace formula consists of 3187 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-15 01:09:07,275 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:07,365 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 01:09:07,366 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:07,722 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:09:07,837 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 01:09:07,838 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:07,838 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 9] total 16 [2019-10-15 01:09:07,838 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678894614] [2019-10-15 01:09:07,839 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-15 01:09:07,840 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:07,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-15 01:09:07,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2019-10-15 01:09:07,840 INFO L87 Difference]: Start difference. First operand 681 states and 1067 transitions. Second operand 9 states. [2019-10-15 01:09:08,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:08,173 INFO L93 Difference]: Finished difference Result 1286 states and 2033 transitions. [2019-10-15 01:09:08,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-15 01:09:08,173 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 130 [2019-10-15 01:09:08,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:08,179 INFO L225 Difference]: With dead ends: 1286 [2019-10-15 01:09:08,179 INFO L226 Difference]: Without dead ends: 692 [2019-10-15 01:09:08,182 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 245 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2019-10-15 01:09:08,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2019-10-15 01:09:08,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 683. [2019-10-15 01:09:08,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 683 states. [2019-10-15 01:09:08,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 1071 transitions. [2019-10-15 01:09:08,217 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 1071 transitions. Word has length 130 [2019-10-15 01:09:08,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:08,217 INFO L462 AbstractCegarLoop]: Abstraction has 683 states and 1071 transitions. [2019-10-15 01:09:08,217 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-15 01:09:08,218 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 1071 transitions. [2019-10-15 01:09:08,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-10-15 01:09:08,221 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:08,221 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:08,430 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:08,430 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:08,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:08,431 INFO L82 PathProgramCache]: Analyzing trace with hash 791722400, now seen corresponding path program 1 times [2019-10-15 01:09:08,431 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:08,431 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111715876] [2019-10-15 01:09:08,431 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:08,431 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:08,432 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:08,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:08,552 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 01:09:08,553 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111715876] [2019-10-15 01:09:08,553 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609531546] [2019-10-15 01:09:08,553 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 01:09:09,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:09,190 INFO L256 TraceCheckSpWp]: Trace formula consists of 3186 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:09:09,194 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:09,244 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 01:09:09,244 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:09,531 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 01:09:09,531 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:09:09,532 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 13 [2019-10-15 01:09:09,532 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238135985] [2019-10-15 01:09:09,534 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-15 01:09:09,534 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:09,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-15 01:09:09,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2019-10-15 01:09:09,535 INFO L87 Difference]: Start difference. First operand 683 states and 1071 transitions. Second operand 11 states. [2019-10-15 01:09:09,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:09,692 INFO L93 Difference]: Finished difference Result 1222 states and 1933 transitions. [2019-10-15 01:09:09,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-15 01:09:09,692 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 130 [2019-10-15 01:09:09,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:09,697 INFO L225 Difference]: With dead ends: 1222 [2019-10-15 01:09:09,697 INFO L226 Difference]: Without dead ends: 700 [2019-10-15 01:09:09,700 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 251 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2019-10-15 01:09:09,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2019-10-15 01:09:09,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 690. [2019-10-15 01:09:09,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 690 states. [2019-10-15 01:09:09,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 1081 transitions. [2019-10-15 01:09:09,723 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 1081 transitions. Word has length 130 [2019-10-15 01:09:09,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:09,724 INFO L462 AbstractCegarLoop]: Abstraction has 690 states and 1081 transitions. [2019-10-15 01:09:09,724 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-15 01:09:09,724 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 1081 transitions. [2019-10-15 01:09:09,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-10-15 01:09:09,726 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:09,727 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:09,935 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:09,935 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:09,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:09,936 INFO L82 PathProgramCache]: Analyzing trace with hash -897013069, now seen corresponding path program 1 times [2019-10-15 01:09:09,936 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:09,937 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922503967] [2019-10-15 01:09:09,937 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:09,937 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:09,938 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:09,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:10,021 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 01:09:10,022 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922503967] [2019-10-15 01:09:10,022 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012394384] [2019-10-15 01:09:10,022 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 01:09:10,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:10,756 INFO L256 TraceCheckSpWp]: Trace formula consists of 3191 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:10,760 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:10,784 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 01:09:10,784 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:10,968 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:09:10,969 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:10,969 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-15 01:09:10,969 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090597633] [2019-10-15 01:09:10,970 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:10,970 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:10,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:10,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:09:10,971 INFO L87 Difference]: Start difference. First operand 690 states and 1081 transitions. Second operand 4 states. [2019-10-15 01:09:11,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:11,166 INFO L93 Difference]: Finished difference Result 1299 states and 2054 transitions. [2019-10-15 01:09:11,166 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:09:11,166 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 131 [2019-10-15 01:09:11,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:11,171 INFO L225 Difference]: With dead ends: 1299 [2019-10-15 01:09:11,171 INFO L226 Difference]: Without dead ends: 690 [2019-10-15 01:09:11,174 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 258 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:09:11,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2019-10-15 01:09:11,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 690. [2019-10-15 01:09:11,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 690 states. [2019-10-15 01:09:11,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 1076 transitions. [2019-10-15 01:09:11,197 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 1076 transitions. Word has length 131 [2019-10-15 01:09:11,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:11,197 INFO L462 AbstractCegarLoop]: Abstraction has 690 states and 1076 transitions. [2019-10-15 01:09:11,197 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:11,197 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 1076 transitions. [2019-10-15 01:09:11,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-10-15 01:09:11,200 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:11,200 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 01:09:11,407 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:11,408 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:11,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:11,408 INFO L82 PathProgramCache]: Analyzing trace with hash -257623020, now seen corresponding path program 1 times [2019-10-15 01:09:11,408 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:11,408 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233483201] [2019-10-15 01:09:11,409 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:11,409 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:11,409 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:11,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:11,525 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 01:09:11,526 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233483201] [2019-10-15 01:09:11,526 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503461018] [2019-10-15 01:09:11,526 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 01:09:12,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:12,218 INFO L256 TraceCheckSpWp]: Trace formula consists of 3187 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:09:12,222 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:12,266 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 01:09:12,266 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:12,576 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 01:09:12,576 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:09:12,577 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 10 [2019-10-15 01:09:12,577 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743775880] [2019-10-15 01:09:12,578 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-15 01:09:12,578 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:12,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-15 01:09:12,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-10-15 01:09:12,579 INFO L87 Difference]: Start difference. First operand 690 states and 1076 transitions. Second operand 8 states. [2019-10-15 01:09:12,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:12,704 INFO L93 Difference]: Finished difference Result 1226 states and 1937 transitions. [2019-10-15 01:09:12,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:09:12,705 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 131 [2019-10-15 01:09:12,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:12,709 INFO L225 Difference]: With dead ends: 1226 [2019-10-15 01:09:12,710 INFO L226 Difference]: Without dead ends: 704 [2019-10-15 01:09:12,713 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 01:09:12,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2019-10-15 01:09:12,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 697. [2019-10-15 01:09:12,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 697 states. [2019-10-15 01:09:12,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1087 transitions. [2019-10-15 01:09:12,804 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1087 transitions. Word has length 131 [2019-10-15 01:09:12,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:12,804 INFO L462 AbstractCegarLoop]: Abstraction has 697 states and 1087 transitions. [2019-10-15 01:09:12,804 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-15 01:09:12,804 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1087 transitions. [2019-10-15 01:09:12,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-10-15 01:09:12,807 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:12,808 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:13,023 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:13,023 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:13,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:13,023 INFO L82 PathProgramCache]: Analyzing trace with hash -63351501, now seen corresponding path program 1 times [2019-10-15 01:09:13,024 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:13,024 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077277213] [2019-10-15 01:09:13,024 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:13,025 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:13,025 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:13,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:13,116 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 01:09:13,116 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077277213] [2019-10-15 01:09:13,116 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492187923] [2019-10-15 01:09:13,117 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 01:09:13,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:13,837 INFO L256 TraceCheckSpWp]: Trace formula consists of 3188 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:13,841 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:13,866 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 01:09:13,866 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:14,061 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 01:09:14,061 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:14,062 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-15 01:09:14,062 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072703958] [2019-10-15 01:09:14,062 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:14,063 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:14,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:14,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:09:14,063 INFO L87 Difference]: Start difference. First operand 697 states and 1087 transitions. Second operand 4 states. [2019-10-15 01:09:14,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:14,250 INFO L93 Difference]: Finished difference Result 1313 states and 2071 transitions. [2019-10-15 01:09:14,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:09:14,253 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 132 [2019-10-15 01:09:14,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:14,258 INFO L225 Difference]: With dead ends: 1313 [2019-10-15 01:09:14,258 INFO L226 Difference]: Without dead ends: 697 [2019-10-15 01:09:14,268 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 260 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 01:09:14,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2019-10-15 01:09:14,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 697. [2019-10-15 01:09:14,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 697 states. [2019-10-15 01:09:14,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1082 transitions. [2019-10-15 01:09:14,294 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1082 transitions. Word has length 132 [2019-10-15 01:09:14,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:14,295 INFO L462 AbstractCegarLoop]: Abstraction has 697 states and 1082 transitions. [2019-10-15 01:09:14,295 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:14,295 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1082 transitions. [2019-10-15 01:09:14,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-10-15 01:09:14,297 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:14,298 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:14,505 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:14,506 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:14,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:14,506 INFO L82 PathProgramCache]: Analyzing trace with hash -346652232, now seen corresponding path program 1 times [2019-10-15 01:09:14,507 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:14,507 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829214434] [2019-10-15 01:09:14,507 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:14,507 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:14,508 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:14,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:14,596 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 01:09:14,596 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829214434] [2019-10-15 01:09:14,596 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626813006] [2019-10-15 01:09:14,597 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 01:09:15,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:15,381 INFO L256 TraceCheckSpWp]: Trace formula consists of 3189 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-15 01:09:15,385 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:15,453 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:09:15,454 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:15,795 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:09:15,920 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:09:15,921 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:09:15,921 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [4] total 16 [2019-10-15 01:09:15,921 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631621511] [2019-10-15 01:09:15,922 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-15 01:09:15,922 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:15,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-15 01:09:15,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2019-10-15 01:09:15,923 INFO L87 Difference]: Start difference. First operand 697 states and 1082 transitions. Second operand 14 states. [2019-10-15 01:09:16,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:16,142 INFO L93 Difference]: Finished difference Result 1227 states and 1932 transitions. [2019-10-15 01:09:16,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-15 01:09:16,143 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 133 [2019-10-15 01:09:16,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:16,147 INFO L225 Difference]: With dead ends: 1227 [2019-10-15 01:09:16,147 INFO L226 Difference]: Without dead ends: 705 [2019-10-15 01:09:16,150 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 252 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2019-10-15 01:09:16,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2019-10-15 01:09:16,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 697. [2019-10-15 01:09:16,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 697 states. [2019-10-15 01:09:16,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1082 transitions. [2019-10-15 01:09:16,171 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1082 transitions. Word has length 133 [2019-10-15 01:09:16,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:16,171 INFO L462 AbstractCegarLoop]: Abstraction has 697 states and 1082 transitions. [2019-10-15 01:09:16,171 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-15 01:09:16,171 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1082 transitions. [2019-10-15 01:09:16,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-10-15 01:09:16,174 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:16,174 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:16,389 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:16,390 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:16,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:16,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1310949591, now seen corresponding path program 1 times [2019-10-15 01:09:16,391 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:16,391 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965029341] [2019-10-15 01:09:16,391 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:16,392 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:16,392 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:16,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:16,482 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:09:16,482 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965029341] [2019-10-15 01:09:16,482 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580502960] [2019-10-15 01:09:16,482 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 01:09:17,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:17,225 INFO L256 TraceCheckSpWp]: Trace formula consists of 3190 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-15 01:09:17,229 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:17,300 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:09:17,300 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:17,623 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:09:17,725 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:09:17,726 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:09:17,726 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [4] total 13 [2019-10-15 01:09:17,726 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503378091] [2019-10-15 01:09:17,726 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-15 01:09:17,727 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:17,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-15 01:09:17,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2019-10-15 01:09:17,727 INFO L87 Difference]: Start difference. First operand 697 states and 1082 transitions. Second operand 11 states. [2019-10-15 01:09:17,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:17,947 INFO L93 Difference]: Finished difference Result 1228 states and 1940 transitions. [2019-10-15 01:09:17,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-15 01:09:17,948 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 134 [2019-10-15 01:09:17,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:17,953 INFO L225 Difference]: With dead ends: 1228 [2019-10-15 01:09:17,954 INFO L226 Difference]: Without dead ends: 706 [2019-10-15 01:09:17,957 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 255 SyntacticMatches, 7 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2019-10-15 01:09:17,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2019-10-15 01:09:17,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 699. [2019-10-15 01:09:17,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 699 states. [2019-10-15 01:09:17,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 1088 transitions. [2019-10-15 01:09:17,981 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 1088 transitions. Word has length 134 [2019-10-15 01:09:17,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:17,981 INFO L462 AbstractCegarLoop]: Abstraction has 699 states and 1088 transitions. [2019-10-15 01:09:17,981 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-15 01:09:17,982 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 1088 transitions. [2019-10-15 01:09:17,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-10-15 01:09:17,984 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:17,984 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 01:09:18,192 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:18,192 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:18,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:18,193 INFO L82 PathProgramCache]: Analyzing trace with hash 919812815, now seen corresponding path program 1 times [2019-10-15 01:09:18,194 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:18,194 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354163453] [2019-10-15 01:09:18,194 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:18,195 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:18,195 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:18,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:18,275 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:09:18,275 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354163453] [2019-10-15 01:09:18,275 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996093245] [2019-10-15 01:09:18,275 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:19,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:19,104 INFO L256 TraceCheckSpWp]: Trace formula consists of 3185 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-15 01:09:19,107 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:19,139 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 01:09:19,139 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:19,344 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:09:19,418 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 01:09:19,418 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:09:19,418 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [4] total 11 [2019-10-15 01:09:19,419 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91914600] [2019-10-15 01:09:19,419 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-15 01:09:19,419 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:19,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-15 01:09:19,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2019-10-15 01:09:19,420 INFO L87 Difference]: Start difference. First operand 699 states and 1088 transitions. Second operand 9 states. [2019-10-15 01:09:19,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:19,547 INFO L93 Difference]: Finished difference Result 1324 states and 2105 transitions. [2019-10-15 01:09:19,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:09:19,548 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 133 [2019-10-15 01:09:19,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:19,553 INFO L225 Difference]: With dead ends: 1324 [2019-10-15 01:09:19,553 INFO L226 Difference]: Without dead ends: 708 [2019-10-15 01:09:19,556 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 01:09:19,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2019-10-15 01:09:19,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 706. [2019-10-15 01:09:19,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 706 states. [2019-10-15 01:09:19,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 1096 transitions. [2019-10-15 01:09:19,579 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 1096 transitions. Word has length 133 [2019-10-15 01:09:19,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:19,579 INFO L462 AbstractCegarLoop]: Abstraction has 706 states and 1096 transitions. [2019-10-15 01:09:19,579 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-15 01:09:19,580 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 1096 transitions. [2019-10-15 01:09:19,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-10-15 01:09:19,582 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:19,582 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 01:09:19,799 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:19,799 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:19,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:19,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1282992091, now seen corresponding path program 1 times [2019-10-15 01:09:19,800 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:19,800 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403832802] [2019-10-15 01:09:19,800 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:19,800 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:19,801 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:19,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:19,889 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 01:09:19,889 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403832802] [2019-10-15 01:09:19,890 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623551260] [2019-10-15 01:09:19,890 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:20,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:20,671 INFO L256 TraceCheckSpWp]: Trace formula consists of 3192 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-15 01:09:20,674 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:20,711 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-15 01:09:20,711 INFO L321 TraceCheckSpWp]: Computing backward predicates...