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_spec13_product29.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 21:08:38,063 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 21:08:38,066 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 21:08:38,079 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 21:08:38,079 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 21:08:38,081 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 21:08:38,082 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 21:08:38,084 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 21:08:38,086 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 21:08:38,087 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 21:08:38,088 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 21:08:38,089 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 21:08:38,089 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 21:08:38,090 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 21:08:38,091 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 21:08:38,092 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 21:08:38,093 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 21:08:38,094 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 21:08:38,096 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 21:08:38,098 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 21:08:38,099 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 21:08:38,100 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 21:08:38,101 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 21:08:38,102 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 21:08:38,104 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 21:08:38,105 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 21:08:38,105 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 21:08:38,106 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 21:08:38,106 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 21:08:38,107 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 21:08:38,107 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 21:08:38,108 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 21:08:38,109 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 21:08:38,109 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 21:08:38,110 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 21:08:38,111 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 21:08:38,111 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 21:08:38,112 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 21:08:38,112 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 21:08:38,113 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 21:08:38,113 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 21:08:38,114 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 21:08:38,129 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 21:08:38,129 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 21:08:38,130 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 21:08:38,130 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 21:08:38,130 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 21:08:38,131 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 21:08:38,131 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 21:08:38,131 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 21:08:38,131 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 21:08:38,132 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 21:08:38,132 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 21:08:38,132 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 21:08:38,132 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 21:08:38,132 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 21:08:38,132 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 21:08:38,133 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 21:08:38,133 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 21:08:38,133 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 21:08:38,133 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 21:08:38,134 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 21:08:38,134 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 21:08:38,134 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:08:38,134 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 21:08:38,134 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 21:08:38,135 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 21:08:38,135 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 21:08:38,135 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 21:08:38,135 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 21:08:38,135 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-13 21:08:38,458 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 21:08:38,471 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 21:08:38,475 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 21:08:38,477 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 21:08:38,477 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 21:08:38,478 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec13_product29.cil.c [2019-10-13 21:08:38,565 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4bedbb96/3c1d026643a3448cb0319e5b5d0f65d0/FLAG25c705682 [2019-10-13 21:08:39,231 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 21:08:39,235 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec13_product29.cil.c [2019-10-13 21:08:39,278 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4bedbb96/3c1d026643a3448cb0319e5b5d0f65d0/FLAG25c705682 [2019-10-13 21:08:39,416 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4bedbb96/3c1d026643a3448cb0319e5b5d0f65d0 [2019-10-13 21:08:39,431 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 21:08:39,435 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 21:08:39,439 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 21:08:39,440 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 21:08:39,444 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 21:08:39,445 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:08:39" (1/1) ... [2019-10-13 21:08:39,449 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@183d653b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:39, skipping insertion in model container [2019-10-13 21:08:39,449 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:08:39" (1/1) ... [2019-10-13 21:08:39,459 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 21:08:39,557 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 21:08:40,407 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:08:40,439 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 21:08:40,597 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:08:40,668 INFO L192 MainTranslator]: Completed translation [2019-10-13 21:08:40,669 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:40 WrapperNode [2019-10-13 21:08:40,669 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 21:08:40,670 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 21:08:40,670 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 21:08:40,671 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 21:08:40,686 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:40" (1/1) ... [2019-10-13 21:08:40,687 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:40" (1/1) ... [2019-10-13 21:08:40,723 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:40" (1/1) ... [2019-10-13 21:08:40,724 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:40" (1/1) ... [2019-10-13 21:08:40,800 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:40" (1/1) ... [2019-10-13 21:08:40,855 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:40" (1/1) ... [2019-10-13 21:08:40,877 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:40" (1/1) ... [2019-10-13 21:08:40,901 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 21:08:40,902 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 21:08:40,902 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 21:08:40,903 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 21:08:40,904 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:40" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:08:40,975 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 21:08:40,976 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 21:08:40,976 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-13 21:08:40,976 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-10-13 21:08:40,976 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-10-13 21:08:40,977 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-10-13 21:08:40,978 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-10-13 21:08:40,978 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-10-13 21:08:40,978 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-10-13 21:08:40,979 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-10-13 21:08:40,979 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-10-13 21:08:40,979 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-13 21:08:40,980 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-10-13 21:08:40,981 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-10-13 21:08:40,981 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-10-13 21:08:40,981 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-10-13 21:08:40,983 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-10-13 21:08:40,983 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-10-13 21:08:40,983 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-10-13 21:08:40,984 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-10-13 21:08:40,984 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-10-13 21:08:40,985 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__weight [2019-10-13 21:08:40,985 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-10-13 21:08:40,985 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-10-13 21:08:40,985 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-10-13 21:08:40,985 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-10-13 21:08:40,987 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-10-13 21:08:40,987 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-10-13 21:08:40,987 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-10-13 21:08:40,987 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-10-13 21:08:40,987 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-10-13 21:08:40,987 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-10-13 21:08:40,988 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2019-10-13 21:08:40,988 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-10-13 21:08:40,988 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-10-13 21:08:40,988 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-10-13 21:08:40,988 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-10-13 21:08:40,988 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-10-13 21:08:40,989 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-10-13 21:08:40,989 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-10-13 21:08:40,989 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-13 21:08:40,989 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-10-13 21:08:40,989 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-10-13 21:08:40,989 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification13_spec__1 [2019-10-13 21:08:40,990 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification13_spec__2 [2019-10-13 21:08:40,990 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-13 21:08:40,990 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-10-13 21:08:40,990 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-10-13 21:08:40,990 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-10-13 21:08:40,990 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-10-13 21:08:40,991 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-10-13 21:08:40,991 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-10-13 21:08:40,991 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-10-13 21:08:40,991 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-10-13 21:08:40,991 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-10-13 21:08:40,991 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-10-13 21:08:40,991 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-13 21:08:40,992 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-10-13 21:08:40,992 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-10-13 21:08:40,992 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-10-13 21:08:40,993 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-13 21:08:40,993 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-10-13 21:08:40,994 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-13 21:08:40,994 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-13 21:08:40,994 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 21:08:40,994 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-13 21:08:40,994 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-13 21:08:40,995 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-13 21:08:40,995 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-13 21:08:40,995 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-13 21:08:40,995 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-13 21:08:40,995 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-13 21:08:40,995 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-13 21:08:40,996 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-13 21:08:40,996 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-13 21:08:40,997 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 21:08:40,997 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 21:08:40,997 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-10-13 21:08:40,997 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-10-13 21:08:40,998 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-10-13 21:08:40,998 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-10-13 21:08:40,998 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-10-13 21:08:40,998 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-10-13 21:08:40,999 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-10-13 21:08:40,999 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-10-13 21:08:41,000 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-10-13 21:08:41,001 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-10-13 21:08:41,001 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-10-13 21:08:41,001 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-10-13 21:08:41,001 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-13 21:08:41,001 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-13 21:08:41,002 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-10-13 21:08:41,002 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-10-13 21:08:41,002 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-10-13 21:08:41,002 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-13 21:08:41,002 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-10-13 21:08:41,002 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-13 21:08:41,003 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-10-13 21:08:41,003 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-10-13 21:08:41,003 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-10-13 21:08:41,003 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-10-13 21:08:41,003 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-10-13 21:08:41,003 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-10-13 21:08:41,004 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-10-13 21:08:41,004 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-10-13 21:08:41,004 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-10-13 21:08:41,004 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-10-13 21:08:41,004 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-10-13 21:08:41,005 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-10-13 21:08:41,005 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__weight [2019-10-13 21:08:41,005 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-10-13 21:08:41,005 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-10-13 21:08:41,005 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-10-13 21:08:41,005 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-10-13 21:08:41,006 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-10-13 21:08:41,006 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2019-10-13 21:08:41,006 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-10-13 21:08:41,007 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-10-13 21:08:41,007 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-10-13 21:08:41,007 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-10-13 21:08:41,008 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-10-13 21:08:41,008 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-10-13 21:08:41,008 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification13_spec__1 [2019-10-13 21:08:41,008 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification13_spec__2 [2019-10-13 21:08:41,009 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 21:08:41,010 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-10-13 21:08:41,010 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-13 21:08:41,013 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-10-13 21:08:41,013 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-10-13 21:08:41,013 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 21:08:41,013 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-10-13 21:08:41,013 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-10-13 21:08:41,014 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-10-13 21:08:41,014 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-10-13 21:08:41,014 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-10-13 21:08:41,014 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-10-13 21:08:41,016 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-10-13 21:08:41,019 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-13 21:08:41,019 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-10-13 21:08:41,019 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-13 21:08:41,020 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-13 21:08:41,020 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-13 21:08:41,020 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-13 21:08:41,021 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-13 21:08:41,026 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 21:08:41,026 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-13 21:08:41,026 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-13 21:08:41,026 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-13 21:08:41,027 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-13 21:08:41,027 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-13 21:08:41,027 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-13 21:08:41,028 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-13 21:08:41,028 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 21:08:41,028 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-13 21:08:41,028 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-13 21:08:41,028 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 21:08:41,029 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-13 21:08:41,029 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-13 21:08:41,029 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 21:08:41,029 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-13 21:08:41,029 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-13 21:08:41,029 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-13 21:08:41,030 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 21:08:41,030 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-13 21:08:41,030 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 21:08:43,425 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 21:08:43,425 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-13 21:08:43,428 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:08:43 BoogieIcfgContainer [2019-10-13 21:08:43,428 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 21:08:43,431 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 21:08:43,431 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 21:08:43,436 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 21:08:43,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:08:39" (1/3) ... [2019-10-13 21:08:43,438 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5273980e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:08:43, skipping insertion in model container [2019-10-13 21:08:43,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:40" (2/3) ... [2019-10-13 21:08:43,439 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5273980e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:08:43, skipping insertion in model container [2019-10-13 21:08:43,439 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:08:43" (3/3) ... [2019-10-13 21:08:43,441 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec13_product29.cil.c [2019-10-13 21:08:43,453 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 21:08:43,465 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 21:08:43,478 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 21:08:43,537 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 21:08:43,537 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 21:08:43,537 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 21:08:43,537 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 21:08:43,538 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 21:08:43,538 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 21:08:43,538 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 21:08:43,538 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 21:08:43,597 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states. [2019-10-13 21:08:43,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-10-13 21:08:43,646 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:43,648 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:08:43,651 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:43,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:43,657 INFO L82 PathProgramCache]: Analyzing trace with hash -332119901, now seen corresponding path program 1 times [2019-10-13 21:08:43,672 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:43,672 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754914437] [2019-10-13 21:08:43,673 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:43,673 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:43,673 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:44,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:44,502 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-13 21:08:44,503 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754914437] [2019-10-13 21:08:44,504 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451045038] [2019-10-13 21:08:44,504 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:45,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:45,179 INFO L256 TraceCheckSpWp]: Trace formula consists of 2987 conjuncts, 1 conjunts are in the unsatisfiable core [2019-10-13 21:08:45,211 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:45,274 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 21:08:45,274 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:45,417 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-13 21:08:45,418 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:08:45,418 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7, 2] total 7 [2019-10-13 21:08:45,418 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327551309] [2019-10-13 21:08:45,425 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-13 21:08:45,426 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:45,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-13 21:08:45,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:08:45,444 INFO L87 Difference]: Start difference. First operand 804 states. Second operand 2 states. [2019-10-13 21:08:45,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:45,548 INFO L93 Difference]: Finished difference Result 1301 states and 2111 transitions. [2019-10-13 21:08:45,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-13 21:08:45,550 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 152 [2019-10-13 21:08:45,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:45,579 INFO L225 Difference]: With dead ends: 1301 [2019-10-13 21:08:45,579 INFO L226 Difference]: Without dead ends: 658 [2019-10-13 21:08:45,598 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 307 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:08:45,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2019-10-13 21:08:45,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 658. [2019-10-13 21:08:45,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 658 states. [2019-10-13 21:08:45,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 1047 transitions. [2019-10-13 21:08:45,732 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 1047 transitions. Word has length 152 [2019-10-13 21:08:45,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:45,734 INFO L462 AbstractCegarLoop]: Abstraction has 658 states and 1047 transitions. [2019-10-13 21:08:45,734 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-13 21:08:45,734 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 1047 transitions. [2019-10-13 21:08:45,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-10-13 21:08:45,741 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:45,742 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:08:45,959 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:45,959 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:45,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:45,960 INFO L82 PathProgramCache]: Analyzing trace with hash 474844739, now seen corresponding path program 1 times [2019-10-13 21:08:45,960 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:45,961 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252156914] [2019-10-13 21:08:45,961 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:45,961 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:45,961 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:46,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:46,284 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-13 21:08:46,284 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252156914] [2019-10-13 21:08:46,285 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570199108] [2019-10-13 21:08:46,285 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:46,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:46,802 INFO L256 TraceCheckSpWp]: Trace formula consists of 2981 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:08:46,811 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:46,877 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:08:46,877 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:47,140 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-13 21:08:47,141 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:08:47,141 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 4] total 10 [2019-10-13 21:08:47,141 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832643213] [2019-10-13 21:08:47,143 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:08:47,143 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:47,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:08:47,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-10-13 21:08:47,144 INFO L87 Difference]: Start difference. First operand 658 states and 1047 transitions. Second operand 4 states. [2019-10-13 21:08:47,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:47,320 INFO L93 Difference]: Finished difference Result 1299 states and 2084 transitions. [2019-10-13 21:08:47,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:08:47,320 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 152 [2019-10-13 21:08:47,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:47,329 INFO L225 Difference]: With dead ends: 1299 [2019-10-13 21:08:47,329 INFO L226 Difference]: Without dead ends: 667 [2019-10-13 21:08:47,334 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 302 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:08:47,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2019-10-13 21:08:47,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 667. [2019-10-13 21:08:47,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 667 states. [2019-10-13 21:08:47,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 1061 transitions. [2019-10-13 21:08:47,374 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 1061 transitions. Word has length 152 [2019-10-13 21:08:47,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:47,374 INFO L462 AbstractCegarLoop]: Abstraction has 667 states and 1061 transitions. [2019-10-13 21:08:47,374 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:08:47,375 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 1061 transitions. [2019-10-13 21:08:47,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-10-13 21:08:47,380 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:47,381 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:08:47,593 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:47,594 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:47,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:47,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1998614119, now seen corresponding path program 1 times [2019-10-13 21:08:47,594 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:47,595 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482621488] [2019-10-13 21:08:47,595 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:47,595 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:47,595 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:47,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:47,780 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 21:08:47,781 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482621488] [2019-10-13 21:08:47,781 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448578015] [2019-10-13 21:08:47,782 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:48,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:48,528 INFO L256 TraceCheckSpWp]: Trace formula consists of 2983 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 21:08:48,536 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:48,624 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-13 21:08:48,624 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:48,901 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 21:08:48,902 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:08:48,902 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 16 [2019-10-13 21:08:48,902 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180626249] [2019-10-13 21:08:48,903 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 21:08:48,903 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:48,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 21:08:48,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2019-10-13 21:08:48,904 INFO L87 Difference]: Start difference. First operand 667 states and 1061 transitions. Second operand 7 states. [2019-10-13 21:08:49,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:49,096 INFO L93 Difference]: Finished difference Result 1317 states and 2109 transitions. [2019-10-13 21:08:49,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:08:49,098 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 154 [2019-10-13 21:08:49,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:49,107 INFO L225 Difference]: With dead ends: 1317 [2019-10-13 21:08:49,107 INFO L226 Difference]: Without dead ends: 678 [2019-10-13 21:08:49,111 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 298 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2019-10-13 21:08:49,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2019-10-13 21:08:49,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 674. [2019-10-13 21:08:49,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 674 states. [2019-10-13 21:08:49,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 674 states to 674 states and 1073 transitions. [2019-10-13 21:08:49,162 INFO L78 Accepts]: Start accepts. Automaton has 674 states and 1073 transitions. Word has length 154 [2019-10-13 21:08:49,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:49,163 INFO L462 AbstractCegarLoop]: Abstraction has 674 states and 1073 transitions. [2019-10-13 21:08:49,163 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 21:08:49,163 INFO L276 IsEmpty]: Start isEmpty. Operand 674 states and 1073 transitions. [2019-10-13 21:08:49,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2019-10-13 21:08:49,170 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:49,170 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:08:49,378 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:49,379 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:49,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:49,379 INFO L82 PathProgramCache]: Analyzing trace with hash -118777742, now seen corresponding path program 1 times [2019-10-13 21:08:49,380 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:49,380 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231324297] [2019-10-13 21:08:49,381 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:49,381 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:49,381 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:49,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:49,624 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-13 21:08:49,625 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231324297] [2019-10-13 21:08:49,625 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036277643] [2019-10-13 21:08:49,626 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:50,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:50,186 INFO L256 TraceCheckSpWp]: Trace formula consists of 2984 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:08:50,197 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:50,233 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:08:50,234 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:50,397 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-13 21:08:50,398 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:08:50,398 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-13 21:08:50,399 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457176685] [2019-10-13 21:08:50,399 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:08:50,400 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:50,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:08:50,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:08:50,401 INFO L87 Difference]: Start difference. First operand 674 states and 1073 transitions. Second operand 4 states. [2019-10-13 21:08:50,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:50,496 INFO L93 Difference]: Finished difference Result 1333 states and 2134 transitions. [2019-10-13 21:08:50,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:08:50,497 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 155 [2019-10-13 21:08:50,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:50,502 INFO L225 Difference]: With dead ends: 1333 [2019-10-13 21:08:50,502 INFO L226 Difference]: Without dead ends: 685 [2019-10-13 21:08:50,506 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 306 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:08:50,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2019-10-13 21:08:50,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 683. [2019-10-13 21:08:50,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 683 states. [2019-10-13 21:08:50,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 1081 transitions. [2019-10-13 21:08:50,533 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 1081 transitions. Word has length 155 [2019-10-13 21:08:50,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:50,534 INFO L462 AbstractCegarLoop]: Abstraction has 683 states and 1081 transitions. [2019-10-13 21:08:50,534 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:08:50,534 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 1081 transitions. [2019-10-13 21:08:50,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2019-10-13 21:08:50,539 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:50,539 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:08:50,750 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:50,751 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:50,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:50,751 INFO L82 PathProgramCache]: Analyzing trace with hash 31725172, now seen corresponding path program 1 times [2019-10-13 21:08:50,752 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:50,752 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834709467] [2019-10-13 21:08:50,752 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:50,752 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:50,752 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:50,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:50,989 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 21:08:50,989 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834709467] [2019-10-13 21:08:50,989 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968145522] [2019-10-13 21:08:50,990 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:51,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:51,515 INFO L256 TraceCheckSpWp]: Trace formula consists of 2984 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 21:08:51,522 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:51,591 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-13 21:08:51,592 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:51,854 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 21:08:51,855 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:08:51,855 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 16 [2019-10-13 21:08:51,856 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773542309] [2019-10-13 21:08:51,857 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 21:08:51,857 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:51,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 21:08:51,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2019-10-13 21:08:51,858 INFO L87 Difference]: Start difference. First operand 683 states and 1081 transitions. Second operand 7 states. [2019-10-13 21:08:52,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:52,059 INFO L93 Difference]: Finished difference Result 1334 states and 2125 transitions. [2019-10-13 21:08:52,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:08:52,060 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 155 [2019-10-13 21:08:52,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:52,065 INFO L225 Difference]: With dead ends: 1334 [2019-10-13 21:08:52,066 INFO L226 Difference]: Without dead ends: 692 [2019-10-13 21:08:52,069 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 300 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2019-10-13 21:08:52,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2019-10-13 21:08:52,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 683. [2019-10-13 21:08:52,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 683 states. [2019-10-13 21:08:52,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 1081 transitions. [2019-10-13 21:08:52,096 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 1081 transitions. Word has length 155 [2019-10-13 21:08:52,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:52,097 INFO L462 AbstractCegarLoop]: Abstraction has 683 states and 1081 transitions. [2019-10-13 21:08:52,097 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 21:08:52,097 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 1081 transitions. [2019-10-13 21:08:52,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2019-10-13 21:08:52,103 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:52,103 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:08:52,313 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:52,313 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:52,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:52,314 INFO L82 PathProgramCache]: Analyzing trace with hash -615340944, now seen corresponding path program 1 times [2019-10-13 21:08:52,314 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:52,314 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367000735] [2019-10-13 21:08:52,315 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:52,315 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:52,315 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:52,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:52,458 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-13 21:08:52,459 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367000735] [2019-10-13 21:08:52,459 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602993358] [2019-10-13 21:08:52,459 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:52,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:52,998 INFO L256 TraceCheckSpWp]: Trace formula consists of 2986 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:08:53,004 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:53,051 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-13 21:08:53,052 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:53,188 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:08:53,188 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:08:53,188 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-13 21:08:53,189 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524810212] [2019-10-13 21:08:53,190 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:08:53,191 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:53,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:08:53,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:08:53,192 INFO L87 Difference]: Start difference. First operand 683 states and 1081 transitions. Second operand 4 states. [2019-10-13 21:08:53,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:53,444 INFO L93 Difference]: Finished difference Result 1367 states and 2195 transitions. [2019-10-13 21:08:53,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:08:53,444 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 158 [2019-10-13 21:08:53,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:53,456 INFO L225 Difference]: With dead ends: 1367 [2019-10-13 21:08:53,456 INFO L226 Difference]: Without dead ends: 725 [2019-10-13 21:08:53,462 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 312 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:08:53,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2019-10-13 21:08:53,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 722. [2019-10-13 21:08:53,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 722 states. [2019-10-13 21:08:53,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 722 states to 722 states and 1154 transitions. [2019-10-13 21:08:53,500 INFO L78 Accepts]: Start accepts. Automaton has 722 states and 1154 transitions. Word has length 158 [2019-10-13 21:08:53,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:53,501 INFO L462 AbstractCegarLoop]: Abstraction has 722 states and 1154 transitions. [2019-10-13 21:08:53,501 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:08:53,501 INFO L276 IsEmpty]: Start isEmpty. Operand 722 states and 1154 transitions. [2019-10-13 21:08:53,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2019-10-13 21:08:53,507 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:53,507 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:08:53,715 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:53,715 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:53,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:53,717 INFO L82 PathProgramCache]: Analyzing trace with hash -35711704, now seen corresponding path program 1 times [2019-10-13 21:08:53,717 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:53,717 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53832063] [2019-10-13 21:08:53,718 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:53,718 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:53,718 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:53,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:53,899 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 21:08:53,900 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53832063] [2019-10-13 21:08:53,900 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231026078] [2019-10-13 21:08:53,900 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:54,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:54,447 INFO L256 TraceCheckSpWp]: Trace formula consists of 2988 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:08:54,454 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:54,484 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 21:08:54,485 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:54,628 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 21:08:54,629 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:08:54,629 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [4] total 7 [2019-10-13 21:08:54,629 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37311950] [2019-10-13 21:08:54,630 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:08:54,630 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:54,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:08:54,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:08:54,631 INFO L87 Difference]: Start difference. First operand 722 states and 1154 transitions. Second operand 5 states. [2019-10-13 21:08:54,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:54,711 INFO L93 Difference]: Finished difference Result 1391 states and 2241 transitions. [2019-10-13 21:08:54,712 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:08:54,712 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 160 [2019-10-13 21:08:54,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:54,720 INFO L225 Difference]: With dead ends: 1391 [2019-10-13 21:08:54,720 INFO L226 Difference]: Without dead ends: 722 [2019-10-13 21:08:54,725 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 317 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:08:54,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2019-10-13 21:08:54,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 722. [2019-10-13 21:08:54,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 722 states. [2019-10-13 21:08:54,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 722 states to 722 states and 1149 transitions. [2019-10-13 21:08:54,756 INFO L78 Accepts]: Start accepts. Automaton has 722 states and 1149 transitions. Word has length 160 [2019-10-13 21:08:54,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:54,756 INFO L462 AbstractCegarLoop]: Abstraction has 722 states and 1149 transitions. [2019-10-13 21:08:54,756 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:08:54,756 INFO L276 IsEmpty]: Start isEmpty. Operand 722 states and 1149 transitions. [2019-10-13 21:08:54,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-10-13 21:08:54,762 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:54,763 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:08:54,970 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:54,971 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:54,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:54,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1690094261, now seen corresponding path program 1 times [2019-10-13 21:08:54,972 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:54,973 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968186592] [2019-10-13 21:08:54,973 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:54,973 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:54,974 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:55,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:55,111 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 21:08:55,111 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968186592] [2019-10-13 21:08:55,112 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238023987] [2019-10-13 21:08:55,112 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:55,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:55,747 INFO L256 TraceCheckSpWp]: Trace formula consists of 2989 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 21:08:55,752 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:55,817 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:08:55,818 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:56,053 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:08:56,054 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:08:56,054 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 13 [2019-10-13 21:08:56,054 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992094588] [2019-10-13 21:08:56,055 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 21:08:56,055 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:56,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 21:08:56,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2019-10-13 21:08:56,056 INFO L87 Difference]: Start difference. First operand 722 states and 1149 transitions. Second operand 11 states. [2019-10-13 21:08:56,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:56,252 INFO L93 Difference]: Finished difference Result 1365 states and 2182 transitions. [2019-10-13 21:08:56,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 21:08:56,253 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 161 [2019-10-13 21:08:56,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:56,262 INFO L225 Difference]: With dead ends: 1365 [2019-10-13 21:08:56,262 INFO L226 Difference]: Without dead ends: 742 [2019-10-13 21:08:56,267 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 313 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:08:56,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2019-10-13 21:08:56,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 729. [2019-10-13 21:08:56,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 729 states. [2019-10-13 21:08:56,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 729 states to 729 states and 1160 transitions. [2019-10-13 21:08:56,320 INFO L78 Accepts]: Start accepts. Automaton has 729 states and 1160 transitions. Word has length 161 [2019-10-13 21:08:56,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:56,321 INFO L462 AbstractCegarLoop]: Abstraction has 729 states and 1160 transitions. [2019-10-13 21:08:56,322 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 21:08:56,322 INFO L276 IsEmpty]: Start isEmpty. Operand 729 states and 1160 transitions. [2019-10-13 21:08:56,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-10-13 21:08:56,330 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:56,330 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:08:56,539 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:56,539 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:56,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:56,540 INFO L82 PathProgramCache]: Analyzing trace with hash -696135748, now seen corresponding path program 1 times [2019-10-13 21:08:56,541 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:56,541 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392101197] [2019-10-13 21:08:56,541 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:56,541 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:56,542 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:56,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:56,670 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:08:56,671 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392101197] [2019-10-13 21:08:56,671 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472365434] [2019-10-13 21:08:56,671 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:57,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:57,274 INFO L256 TraceCheckSpWp]: Trace formula consists of 2990 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 21:08:57,278 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:57,403 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:08:57,403 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:57,641 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:08:57,642 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:08:57,642 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 10 [2019-10-13 21:08:57,642 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287524046] [2019-10-13 21:08:57,643 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 21:08:57,643 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:57,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 21:08:57,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-10-13 21:08:57,644 INFO L87 Difference]: Start difference. First operand 729 states and 1160 transitions. Second operand 8 states. [2019-10-13 21:08:57,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:57,793 INFO L93 Difference]: Finished difference Result 1363 states and 2178 transitions. [2019-10-13 21:08:57,793 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:08:57,793 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 162 [2019-10-13 21:08:57,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:57,800 INFO L225 Difference]: With dead ends: 1363 [2019-10-13 21:08:57,800 INFO L226 Difference]: Without dead ends: 740 [2019-10-13 21:08:57,804 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 315 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:08:57,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2019-10-13 21:08:57,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 733. [2019-10-13 21:08:57,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 733 states. [2019-10-13 21:08:57,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 1165 transitions. [2019-10-13 21:08:57,832 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 1165 transitions. Word has length 162 [2019-10-13 21:08:57,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:57,832 INFO L462 AbstractCegarLoop]: Abstraction has 733 states and 1165 transitions. [2019-10-13 21:08:57,833 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 21:08:57,833 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 1165 transitions. [2019-10-13 21:08:57,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-10-13 21:08:57,838 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:57,839 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:08:58,048 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:58,048 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:58,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:58,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1193684081, now seen corresponding path program 1 times [2019-10-13 21:08:58,049 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:58,050 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753219199] [2019-10-13 21:08:58,050 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:58,050 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:58,050 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:58,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:58,164 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:08:58,164 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753219199] [2019-10-13 21:08:58,165 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582340861] [2019-10-13 21:08:58,165 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:58,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:58,740 INFO L256 TraceCheckSpWp]: Trace formula consists of 2991 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:08:58,745 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:58,774 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-13 21:08:58,774 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:58,904 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-13 21:08:58,905 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:08:58,905 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [4] total 7 [2019-10-13 21:08:58,905 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52933405] [2019-10-13 21:08:58,906 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:08:58,907 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:58,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:08:58,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:08:58,907 INFO L87 Difference]: Start difference. First operand 733 states and 1165 transitions. Second operand 5 states. [2019-10-13 21:08:59,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:59,132 INFO L93 Difference]: Finished difference Result 1401 states and 2255 transitions. [2019-10-13 21:08:59,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:08:59,133 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 163 [2019-10-13 21:08:59,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:59,141 INFO L225 Difference]: With dead ends: 1401 [2019-10-13 21:08:59,141 INFO L226 Difference]: Without dead ends: 778 [2019-10-13 21:08:59,147 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 323 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:08:59,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2019-10-13 21:08:59,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 775. [2019-10-13 21:08:59,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 775 states. [2019-10-13 21:08:59,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 1241 transitions. [2019-10-13 21:08:59,198 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 1241 transitions. Word has length 163 [2019-10-13 21:08:59,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:59,199 INFO L462 AbstractCegarLoop]: Abstraction has 775 states and 1241 transitions. [2019-10-13 21:08:59,199 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:08:59,199 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 1241 transitions. [2019-10-13 21:08:59,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2019-10-13 21:08:59,206 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:59,206 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:08:59,415 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:59,415 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:59,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:59,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1972154266, now seen corresponding path program 1 times [2019-10-13 21:08:59,416 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:59,416 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446773487] [2019-10-13 21:08:59,416 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:59,416 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:59,416 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:59,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:59,589 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 21:08:59,589 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446773487] [2019-10-13 21:08:59,590 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100586275] [2019-10-13 21:08:59,590 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:00,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:00,196 INFO L256 TraceCheckSpWp]: Trace formula consists of 2992 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:09:00,200 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:00,253 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 21:09:00,254 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:00,373 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 21:09:00,373 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:09:00,374 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [4] total 8 [2019-10-13 21:09:00,374 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074214075] [2019-10-13 21:09:00,374 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 21:09:00,375 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:00,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 21:09:00,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:09:00,375 INFO L87 Difference]: Start difference. First operand 775 states and 1241 transitions. Second operand 6 states. [2019-10-13 21:09:00,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:00,452 INFO L93 Difference]: Finished difference Result 1455 states and 2340 transitions. [2019-10-13 21:09:00,453 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:09:00,453 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 164 [2019-10-13 21:09:00,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:00,459 INFO L225 Difference]: With dead ends: 1455 [2019-10-13 21:09:00,459 INFO L226 Difference]: Without dead ends: 771 [2019-10-13 21:09:00,462 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 326 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2019-10-13 21:09:00,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2019-10-13 21:09:00,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 768. [2019-10-13 21:09:00,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 768 states. [2019-10-13 21:09:00,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 1228 transitions. [2019-10-13 21:09:00,493 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 1228 transitions. Word has length 164 [2019-10-13 21:09:00,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:00,493 INFO L462 AbstractCegarLoop]: Abstraction has 768 states and 1228 transitions. [2019-10-13 21:09:00,493 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 21:09:00,493 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 1228 transitions. [2019-10-13 21:09:00,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2019-10-13 21:09:00,498 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:00,499 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:00,707 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:00,707 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:00,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:00,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1100933032, now seen corresponding path program 1 times [2019-10-13 21:09:00,708 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:00,708 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304727266] [2019-10-13 21:09:00,708 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:00,708 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:00,708 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:00,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:00,807 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 21:09:00,807 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304727266] [2019-10-13 21:09:00,808 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595729396] [2019-10-13 21:09:00,808 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:01,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:01,451 INFO L256 TraceCheckSpWp]: Trace formula consists of 2992 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 21:09:01,457 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:01,477 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-13 21:09:01,477 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:01,692 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 21:09:01,693 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:01,693 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 5 [2019-10-13 21:09:01,693 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091757270] [2019-10-13 21:09:01,694 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:01,694 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:01,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:01,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 21:09:01,695 INFO L87 Difference]: Start difference. First operand 768 states and 1228 transitions. Second operand 4 states. [2019-10-13 21:09:01,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:01,759 INFO L93 Difference]: Finished difference Result 1495 states and 2412 transitions. [2019-10-13 21:09:01,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:09:01,760 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 165 [2019-10-13 21:09:01,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:01,766 INFO L225 Difference]: With dead ends: 1495 [2019-10-13 21:09:01,766 INFO L226 Difference]: Without dead ends: 745 [2019-10-13 21:09:01,771 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:09:01,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2019-10-13 21:09:01,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 745. [2019-10-13 21:09:01,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 745 states. [2019-10-13 21:09:01,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 1185 transitions. [2019-10-13 21:09:01,803 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 1185 transitions. Word has length 165 [2019-10-13 21:09:01,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:01,803 INFO L462 AbstractCegarLoop]: Abstraction has 745 states and 1185 transitions. [2019-10-13 21:09:01,803 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:09:01,803 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 1185 transitions. [2019-10-13 21:09:01,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-10-13 21:09:01,808 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:01,808 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:02,017 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:02,018 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:02,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:02,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1009694125, now seen corresponding path program 1 times [2019-10-13 21:09:02,019 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:02,019 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070291254] [2019-10-13 21:09:02,019 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:02,020 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:02,020 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:02,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:02,161 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 21:09:02,162 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070291254] [2019-10-13 21:09:02,162 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712347517] [2019-10-13 21:09:02,163 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:02,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:02,773 INFO L256 TraceCheckSpWp]: Trace formula consists of 2991 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 21:09:02,777 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:02,844 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-13 21:09:02,845 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:03,066 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 21:09:03,066 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:03,066 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 13 [2019-10-13 21:09:03,066 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320492460] [2019-10-13 21:09:03,067 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 21:09:03,067 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:03,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 21:09:03,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2019-10-13 21:09:03,068 INFO L87 Difference]: Start difference. First operand 745 states and 1185 transitions. Second operand 7 states. [2019-10-13 21:09:03,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:03,203 INFO L93 Difference]: Finished difference Result 1444 states and 2305 transitions. [2019-10-13 21:09:03,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:09:03,204 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 163 [2019-10-13 21:09:03,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:03,210 INFO L225 Difference]: With dead ends: 1444 [2019-10-13 21:09:03,210 INFO L226 Difference]: Without dead ends: 747 [2019-10-13 21:09:03,214 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 316 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:09:03,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2019-10-13 21:09:03,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 739. [2019-10-13 21:09:03,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 739 states. [2019-10-13 21:09:03,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 1171 transitions. [2019-10-13 21:09:03,243 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 1171 transitions. Word has length 163 [2019-10-13 21:09:03,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:03,243 INFO L462 AbstractCegarLoop]: Abstraction has 739 states and 1171 transitions. [2019-10-13 21:09:03,243 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 21:09:03,243 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 1171 transitions. [2019-10-13 21:09:03,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-10-13 21:09:03,248 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:03,249 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:03,457 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:03,458 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:03,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:03,458 INFO L82 PathProgramCache]: Analyzing trace with hash -363462827, now seen corresponding path program 1 times [2019-10-13 21:09:03,459 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:03,459 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215244769] [2019-10-13 21:09:03,459 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:03,459 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:03,459 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:03,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:03,599 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 21:09:03,600 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215244769] [2019-10-13 21:09:03,600 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262910356] [2019-10-13 21:09:03,600 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:04,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:04,255 INFO L256 TraceCheckSpWp]: Trace formula consists of 2987 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 21:09:04,259 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:04,350 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-13 21:09:04,351 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:04,615 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:09:04,702 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:09:04,702 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:04,702 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 9] total 19 [2019-10-13 21:09:04,703 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705182066] [2019-10-13 21:09:04,703 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 21:09:04,703 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:04,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 21:09:04,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2019-10-13 21:09:04,704 INFO L87 Difference]: Start difference. First operand 739 states and 1171 transitions. Second operand 9 states. [2019-10-13 21:09:04,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:04,930 INFO L93 Difference]: Finished difference Result 1441 states and 2297 transitions. [2019-10-13 21:09:04,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 21:09:04,931 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 163 [2019-10-13 21:09:04,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:04,936 INFO L225 Difference]: With dead ends: 1441 [2019-10-13 21:09:04,936 INFO L226 Difference]: Without dead ends: 751 [2019-10-13 21:09:04,940 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 311 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2019-10-13 21:09:04,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2019-10-13 21:09:04,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 741. [2019-10-13 21:09:04,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 741 states. [2019-10-13 21:09:04,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 1175 transitions. [2019-10-13 21:09:04,970 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 1175 transitions. Word has length 163 [2019-10-13 21:09:04,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:04,970 INFO L462 AbstractCegarLoop]: Abstraction has 741 states and 1175 transitions. [2019-10-13 21:09:04,970 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 21:09:04,970 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 1175 transitions. [2019-10-13 21:09:04,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2019-10-13 21:09:04,975 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:04,976 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:05,184 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:05,184 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:05,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:05,185 INFO L82 PathProgramCache]: Analyzing trace with hash -2016603232, now seen corresponding path program 1 times [2019-10-13 21:09:05,185 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:05,185 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920388655] [2019-10-13 21:09:05,186 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:05,186 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:05,186 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:05,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:05,329 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 21:09:05,329 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920388655] [2019-10-13 21:09:05,329 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693325870] [2019-10-13 21:09:05,330 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:05,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:05,962 INFO L256 TraceCheckSpWp]: Trace formula consists of 2988 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 21:09:05,967 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:06,057 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-13 21:09:06,057 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:06,298 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:09:06,397 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:09:06,398 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:06,398 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 9] total 19 [2019-10-13 21:09:06,398 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123335393] [2019-10-13 21:09:06,399 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 21:09:06,399 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:06,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 21:09:06,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2019-10-13 21:09:06,400 INFO L87 Difference]: Start difference. First operand 741 states and 1175 transitions. Second operand 9 states. [2019-10-13 21:09:06,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:06,671 INFO L93 Difference]: Finished difference Result 1442 states and 2301 transitions. [2019-10-13 21:09:06,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 21:09:06,672 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 164 [2019-10-13 21:09:06,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:06,730 INFO L225 Difference]: With dead ends: 1442 [2019-10-13 21:09:06,730 INFO L226 Difference]: Without dead ends: 750 [2019-10-13 21:09:06,735 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 313 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2019-10-13 21:09:06,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2019-10-13 21:09:06,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 741. [2019-10-13 21:09:06,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 741 states. [2019-10-13 21:09:06,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 1175 transitions. [2019-10-13 21:09:06,764 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 1175 transitions. Word has length 164 [2019-10-13 21:09:06,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:06,765 INFO L462 AbstractCegarLoop]: Abstraction has 741 states and 1175 transitions. [2019-10-13 21:09:06,765 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 21:09:06,765 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 1175 transitions. [2019-10-13 21:09:06,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2019-10-13 21:09:06,774 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:06,774 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:06,982 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:06,983 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:06,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:06,984 INFO L82 PathProgramCache]: Analyzing trace with hash -407919536, now seen corresponding path program 1 times [2019-10-13 21:09:06,984 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:06,984 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841991609] [2019-10-13 21:09:06,985 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:06,985 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:06,986 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:07,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:07,111 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 21:09:07,112 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841991609] [2019-10-13 21:09:07,112 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325636695] [2019-10-13 21:09:07,113 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:07,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:07,749 INFO L256 TraceCheckSpWp]: Trace formula consists of 2989 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 21:09:07,755 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:07,843 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-13 21:09:07,843 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:08,081 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:09:08,171 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:09:08,171 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:08,172 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 9] total 16 [2019-10-13 21:09:08,172 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801389476] [2019-10-13 21:09:08,172 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 21:09:08,172 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:08,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 21:09:08,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2019-10-13 21:09:08,173 INFO L87 Difference]: Start difference. First operand 741 states and 1175 transitions. Second operand 9 states. [2019-10-13 21:09:08,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:08,405 INFO L93 Difference]: Finished difference Result 1443 states and 2305 transitions. [2019-10-13 21:09:08,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 21:09:08,405 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 165 [2019-10-13 21:09:08,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:08,413 INFO L225 Difference]: With dead ends: 1443 [2019-10-13 21:09:08,413 INFO L226 Difference]: Without dead ends: 751 [2019-10-13 21:09:08,417 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 315 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2019-10-13 21:09:08,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2019-10-13 21:09:08,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 741. [2019-10-13 21:09:08,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 741 states. [2019-10-13 21:09:08,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 1175 transitions. [2019-10-13 21:09:08,442 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 1175 transitions. Word has length 165 [2019-10-13 21:09:08,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:08,443 INFO L462 AbstractCegarLoop]: Abstraction has 741 states and 1175 transitions. [2019-10-13 21:09:08,443 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 21:09:08,443 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 1175 transitions. [2019-10-13 21:09:08,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-10-13 21:09:08,448 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:08,448 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:08,655 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:08,656 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:08,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:08,656 INFO L82 PathProgramCache]: Analyzing trace with hash -761903813, now seen corresponding path program 1 times [2019-10-13 21:09:08,657 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:08,657 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194744354] [2019-10-13 21:09:08,657 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:08,658 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:08,658 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:08,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:08,780 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 21:09:08,780 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194744354] [2019-10-13 21:09:08,780 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922860764] [2019-10-13 21:09:08,781 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:09,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:09,611 INFO L256 TraceCheckSpWp]: Trace formula consists of 2990 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-13 21:09:09,616 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:09,770 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-13 21:09:09,770 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:09,955 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 21:09:09,956 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:09,957 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 8 [2019-10-13 21:09:09,957 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523232313] [2019-10-13 21:09:09,957 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 21:09:09,957 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:09,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 21:09:09,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:09:09,958 INFO L87 Difference]: Start difference. First operand 741 states and 1175 transitions. Second operand 7 states. [2019-10-13 21:09:10,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:10,065 INFO L93 Difference]: Finished difference Result 1440 states and 2298 transitions. [2019-10-13 21:09:10,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:09:10,066 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 166 [2019-10-13 21:09:10,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:10,071 INFO L225 Difference]: With dead ends: 1440 [2019-10-13 21:09:10,071 INFO L226 Difference]: Without dead ends: 740 [2019-10-13 21:09:10,074 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:09:10,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2019-10-13 21:09:10,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 734. [2019-10-13 21:09:10,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 734 states. [2019-10-13 21:09:10,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 1159 transitions. [2019-10-13 21:09:10,098 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 1159 transitions. Word has length 166 [2019-10-13 21:09:10,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:10,098 INFO L462 AbstractCegarLoop]: Abstraction has 734 states and 1159 transitions. [2019-10-13 21:09:10,098 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 21:09:10,098 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 1159 transitions. [2019-10-13 21:09:10,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2019-10-13 21:09:10,103 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:10,103 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:10,311 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:10,312 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:10,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:10,312 INFO L82 PathProgramCache]: Analyzing trace with hash 2040198580, now seen corresponding path program 1 times [2019-10-13 21:09:10,312 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:10,312 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101675027] [2019-10-13 21:09:10,313 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:10,313 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:10,313 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:10,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:10,431 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:09:10,432 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101675027] [2019-10-13 21:09:10,432 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:09:10,432 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 21:09:10,432 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277218125] [2019-10-13 21:09:10,433 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:10,433 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:10,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:10,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:09:10,434 INFO L87 Difference]: Start difference. First operand 734 states and 1159 transitions. Second operand 4 states. [2019-10-13 21:09:10,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:10,488 INFO L93 Difference]: Finished difference Result 1404 states and 2242 transitions. [2019-10-13 21:09:10,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:09:10,490 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 167 [2019-10-13 21:09:10,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:10,498 INFO L225 Difference]: With dead ends: 1404 [2019-10-13 21:09:10,498 INFO L226 Difference]: Without dead ends: 712 [2019-10-13 21:09:10,502 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 21:09:10,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states. [2019-10-13 21:09:10,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 712. [2019-10-13 21:09:10,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 712 states. [2019-10-13 21:09:10,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 1121 transitions. [2019-10-13 21:09:10,523 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 1121 transitions. Word has length 167 [2019-10-13 21:09:10,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:10,524 INFO L462 AbstractCegarLoop]: Abstraction has 712 states and 1121 transitions. [2019-10-13 21:09:10,524 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:09:10,524 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 1121 transitions. [2019-10-13 21:09:10,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2019-10-13 21:09:10,528 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:10,530 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:10,530 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:10,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:10,530 INFO L82 PathProgramCache]: Analyzing trace with hash 111297517, now seen corresponding path program 1 times [2019-10-13 21:09:10,531 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:10,531 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079564815] [2019-10-13 21:09:10,531 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:10,531 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:10,531 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:10,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:10,666 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 21:09:10,667 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079564815] [2019-10-13 21:09:10,667 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:09:10,667 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 21:09:10,667 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545192109] [2019-10-13 21:09:10,668 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 21:09:10,668 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:10,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 21:09:10,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:09:10,669 INFO L87 Difference]: Start difference. First operand 712 states and 1121 transitions. Second operand 7 states. [2019-10-13 21:09:10,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:10,778 INFO L93 Difference]: Finished difference Result 1343 states and 2136 transitions. [2019-10-13 21:09:10,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:09:10,778 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 165 [2019-10-13 21:09:10,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:10,783 INFO L225 Difference]: With dead ends: 1343 [2019-10-13 21:09:10,784 INFO L226 Difference]: Without dead ends: 701 [2019-10-13 21:09:10,788 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:09:10,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2019-10-13 21:09:10,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 698. [2019-10-13 21:09:10,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 698 states. [2019-10-13 21:09:10,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 1093 transitions. [2019-10-13 21:09:10,810 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 1093 transitions. Word has length 165 [2019-10-13 21:09:10,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:10,810 INFO L462 AbstractCegarLoop]: Abstraction has 698 states and 1093 transitions. [2019-10-13 21:09:10,810 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 21:09:10,810 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 1093 transitions. [2019-10-13 21:09:10,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-10-13 21:09:10,814 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:10,814 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:10,815 INFO L410 AbstractCegarLoop]: === Iteration 20 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:10,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:10,815 INFO L82 PathProgramCache]: Analyzing trace with hash -397307674, now seen corresponding path program 1 times [2019-10-13 21:09:10,815 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:10,816 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122925889] [2019-10-13 21:09:10,816 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:10,816 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:10,816 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:10,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:10,997 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 21:09:10,997 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122925889] [2019-10-13 21:09:10,998 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:09:10,998 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2019-10-13 21:09:10,998 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329031451] [2019-10-13 21:09:10,998 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 21:09:10,999 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:10,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 21:09:10,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:09:10,999 INFO L87 Difference]: Start difference. First operand 698 states and 1093 transitions. Second operand 11 states. [2019-10-13 21:09:11,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:11,321 INFO L93 Difference]: Finished difference Result 1334 states and 2116 transitions. [2019-10-13 21:09:11,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 21:09:11,324 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 166 [2019-10-13 21:09:11,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:11,330 INFO L225 Difference]: With dead ends: 1334 [2019-10-13 21:09:11,330 INFO L226 Difference]: Without dead ends: 700 [2019-10-13 21:09:11,334 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2019-10-13 21:09:11,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2019-10-13 21:09:11,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 698. [2019-10-13 21:09:11,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 698 states. [2019-10-13 21:09:11,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 1092 transitions. [2019-10-13 21:09:11,355 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 1092 transitions. Word has length 166 [2019-10-13 21:09:11,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:11,355 INFO L462 AbstractCegarLoop]: Abstraction has 698 states and 1092 transitions. [2019-10-13 21:09:11,355 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 21:09:11,356 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 1092 transitions. [2019-10-13 21:09:11,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2019-10-13 21:09:11,359 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:11,359 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:11,360 INFO L410 AbstractCegarLoop]: === Iteration 21 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:11,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:11,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1137515439, now seen corresponding path program 1 times [2019-10-13 21:09:11,360 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:11,360 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574229708] [2019-10-13 21:09:11,361 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:11,361 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:11,361 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:11,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:11,569 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 21:09:11,570 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574229708] [2019-10-13 21:09:11,570 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:09:11,570 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2019-10-13 21:09:11,571 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742869400] [2019-10-13 21:09:11,572 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 21:09:11,572 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:11,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 21:09:11,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:09:11,572 INFO L87 Difference]: Start difference. First operand 698 states and 1092 transitions. Second operand 11 states. [2019-10-13 21:09:11,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:11,943 INFO L93 Difference]: Finished difference Result 1333 states and 2116 transitions. [2019-10-13 21:09:11,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 21:09:11,944 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 167 [2019-10-13 21:09:11,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:11,949 INFO L225 Difference]: With dead ends: 1333 [2019-10-13 21:09:11,950 INFO L226 Difference]: Without dead ends: 706 [2019-10-13 21:09:11,954 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2019-10-13 21:09:11,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2019-10-13 21:09:11,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 704. [2019-10-13 21:09:11,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 704 states. [2019-10-13 21:09:11,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704 states to 704 states and 1099 transitions. [2019-10-13 21:09:11,984 INFO L78 Accepts]: Start accepts. Automaton has 704 states and 1099 transitions. Word has length 167 [2019-10-13 21:09:11,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:11,984 INFO L462 AbstractCegarLoop]: Abstraction has 704 states and 1099 transitions. [2019-10-13 21:09:11,984 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 21:09:11,984 INFO L276 IsEmpty]: Start isEmpty. Operand 704 states and 1099 transitions. [2019-10-13 21:09:11,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2019-10-13 21:09:11,989 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:11,989 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:11,989 INFO L410 AbstractCegarLoop]: === Iteration 22 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:11,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:11,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1719921697, now seen corresponding path program 1 times [2019-10-13 21:09:11,990 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:11,990 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831754223] [2019-10-13 21:09:11,990 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:11,990 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:11,991 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:12,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:12,172 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-10-13 21:09:12,173 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831754223] [2019-10-13 21:09:12,173 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:09:12,173 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 21:09:12,173 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955536490] [2019-10-13 21:09:12,174 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:12,174 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:12,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:12,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:09:12,175 INFO L87 Difference]: Start difference. First operand 704 states and 1099 transitions. Second operand 4 states.