/usr/bin/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 --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/product-lines/elevator_spec3_product25.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 04:12:14,896 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 04:12:14,899 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 04:12:14,914 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 04:12:14,914 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 04:12:14,916 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 04:12:14,918 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 04:12:14,927 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 04:12:14,933 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 04:12:14,936 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 04:12:14,938 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 04:12:14,939 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 04:12:14,939 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 04:12:14,941 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 04:12:14,943 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 04:12:14,945 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 04:12:14,947 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 04:12:14,949 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 04:12:14,951 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 04:12:14,957 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 04:12:14,962 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 04:12:14,965 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 04:12:14,969 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 04:12:14,969 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 04:12:14,972 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-07 04:12:14,972 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-07 04:12:14,972 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-07 04:12:14,974 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-07 04:12:14,975 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-07 04:12:14,977 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-07 04:12:14,977 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-07 04:12:14,978 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-07 04:12:14,979 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-07 04:12:14,980 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-07 04:12:14,981 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-07 04:12:14,982 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-07 04:12:14,982 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-07 04:12:14,983 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-07 04:12:14,983 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 04:12:14,984 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 04:12:14,984 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 04:12:14,985 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 [2019-11-07 04:12:15,018 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 04:12:15,022 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 04:12:15,023 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 04:12:15,024 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 04:12:15,027 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 04:12:15,027 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 04:12:15,027 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 04:12:15,028 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 04:12:15,028 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 04:12:15,028 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 04:12:15,028 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 04:12:15,028 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 04:12:15,029 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 04:12:15,029 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 04:12:15,029 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 04:12:15,029 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 04:12:15,029 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 04:12:15,031 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 04:12:15,031 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 04:12:15,032 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 04:12:15,032 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 04:12:15,032 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 04:12:15,032 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 04:12:15,033 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 04:12:15,033 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 04:12:15,033 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 04:12:15,033 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 04:12:15,033 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 04:12:15,033 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-11-07 04:12:15,302 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 04:12:15,318 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 04:12:15,322 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 04:12:15,323 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 04:12:15,324 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 04:12:15,324 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec3_product25.cil.c [2019-11-07 04:12:15,403 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05e683c22/76c0d78cb71d4427859c10b4b5eca97b/FLAG09ac6483f [2019-11-07 04:12:16,028 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 04:12:16,031 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec3_product25.cil.c [2019-11-07 04:12:16,060 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05e683c22/76c0d78cb71d4427859c10b4b5eca97b/FLAG09ac6483f [2019-11-07 04:12:16,235 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05e683c22/76c0d78cb71d4427859c10b4b5eca97b [2019-11-07 04:12:16,244 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 04:12:16,246 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 04:12:16,247 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 04:12:16,248 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 04:12:16,251 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 04:12:16,252 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:12:16" (1/1) ... [2019-11-07 04:12:16,255 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c25fe17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:12:16, skipping insertion in model container [2019-11-07 04:12:16,256 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:12:16" (1/1) ... [2019-11-07 04:12:16,264 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 04:12:16,342 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 04:12:17,104 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 04:12:17,124 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 04:12:17,288 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 04:12:17,367 INFO L192 MainTranslator]: Completed translation [2019-11-07 04:12:17,368 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:12:17 WrapperNode [2019-11-07 04:12:17,368 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 04:12:17,369 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 04:12:17,369 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 04:12:17,369 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 04:12:17,384 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:12:17" (1/1) ... [2019-11-07 04:12:17,386 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:12:17" (1/1) ... [2019-11-07 04:12:17,420 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:12:17" (1/1) ... [2019-11-07 04:12:17,421 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:12:17" (1/1) ... [2019-11-07 04:12:17,482 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:12:17" (1/1) ... [2019-11-07 04:12:17,533 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:12:17" (1/1) ... [2019-11-07 04:12:17,559 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:12:17" (1/1) ... [2019-11-07 04:12:17,597 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 04:12:17,597 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 04:12:17,598 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 04:12:17,598 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 04:12:17,599 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:12:17" (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 [2019-11-07 04:12:17,669 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 04:12:17,669 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 04:12:17,669 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-11-07 04:12:17,669 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-11-07 04:12:17,670 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-11-07 04:12:17,670 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-11-07 04:12:17,670 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-11-07 04:12:17,670 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-11-07 04:12:17,671 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-11-07 04:12:17,671 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-11-07 04:12:17,671 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-11-07 04:12:17,671 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-11-07 04:12:17,672 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-11-07 04:12:17,672 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-11-07 04:12:17,672 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-11-07 04:12:17,672 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-11-07 04:12:17,672 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-11-07 04:12:17,673 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-11-07 04:12:17,673 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-11-07 04:12:17,673 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-11-07 04:12:17,673 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-11-07 04:12:17,675 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-11-07 04:12:17,675 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-11-07 04:12:17,675 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-11-07 04:12:17,675 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-11-07 04:12:17,676 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-11-07 04:12:17,676 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-11-07 04:12:17,676 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-11-07 04:12:17,676 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-11-07 04:12:17,676 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-11-07 04:12:17,676 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-11-07 04:12:17,677 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-11-07 04:12:17,677 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-11-07 04:12:17,677 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-11-07 04:12:17,677 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-11-07 04:12:17,677 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-11-07 04:12:17,677 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-11-07 04:12:17,678 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-11-07 04:12:17,678 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 04:12:17,678 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-11-07 04:12:17,678 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-11-07 04:12:17,678 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-11-07 04:12:17,679 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-11-07 04:12:17,679 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-11-07 04:12:17,679 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-11-07 04:12:17,679 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-11-07 04:12:17,679 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-11-07 04:12:17,679 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-11-07 04:12:17,680 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__weight [2019-11-07 04:12:17,680 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-11-07 04:12:17,680 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-11-07 04:12:17,680 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-11-07 04:12:17,680 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-11-07 04:12:17,680 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-11-07 04:12:17,681 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-11-07 04:12:17,681 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-11-07 04:12:17,681 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-11-07 04:12:17,681 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-11-07 04:12:17,681 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-11-07 04:12:17,681 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-11-07 04:12:17,682 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-11-07 04:12:17,682 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-11-07 04:12:17,682 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-11-07 04:12:17,682 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-11-07 04:12:17,682 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-11-07 04:12:17,683 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-11-07 04:12:17,683 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-11-07 04:12:17,683 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-11-07 04:12:17,683 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification3_spec__1 [2019-11-07 04:12:17,683 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification3_spec__2 [2019-11-07 04:12:17,684 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-11-07 04:12:17,684 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-11-07 04:12:17,684 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-11-07 04:12:17,684 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 04:12:17,685 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 04:12:17,685 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-11-07 04:12:17,685 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-07 04:12:17,685 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-07 04:12:17,685 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-11-07 04:12:17,686 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-07 04:12:17,686 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-07 04:12:17,686 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 04:12:17,686 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-07 04:12:17,686 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-11-07 04:12:17,687 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 04:12:17,687 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-11-07 04:12:17,687 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-11-07 04:12:17,687 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 04:12:17,687 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-11-07 04:12:17,687 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-11-07 04:12:17,688 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 04:12:17,688 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-11-07 04:12:17,688 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-11-07 04:12:17,688 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-11-07 04:12:17,688 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-11-07 04:12:17,689 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-11-07 04:12:17,689 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-11-07 04:12:17,689 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-11-07 04:12:17,689 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-11-07 04:12:17,689 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-11-07 04:12:17,689 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-11-07 04:12:17,690 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-11-07 04:12:17,690 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-11-07 04:12:17,690 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-11-07 04:12:17,690 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-11-07 04:12:17,690 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-07 04:12:17,690 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-11-07 04:12:17,691 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-11-07 04:12:17,691 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-11-07 04:12:17,691 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-11-07 04:12:17,691 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-11-07 04:12:17,691 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-11-07 04:12:17,691 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-11-07 04:12:17,692 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-11-07 04:12:17,692 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-11-07 04:12:17,692 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-11-07 04:12:17,692 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-11-07 04:12:17,692 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-11-07 04:12:17,693 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-11-07 04:12:17,693 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-11-07 04:12:17,693 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-11-07 04:12:17,693 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-11-07 04:12:17,694 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-11-07 04:12:17,694 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-11-07 04:12:17,694 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-11-07 04:12:17,694 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-11-07 04:12:17,694 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-11-07 04:12:17,695 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-11-07 04:12:17,695 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-11-07 04:12:17,695 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 04:12:17,695 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-11-07 04:12:17,695 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-11-07 04:12:17,695 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-11-07 04:12:17,696 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-11-07 04:12:17,696 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-11-07 04:12:17,696 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-11-07 04:12:17,696 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-11-07 04:12:17,696 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-11-07 04:12:17,696 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-11-07 04:12:17,697 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-11-07 04:12:17,697 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-11-07 04:12:17,697 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-11-07 04:12:17,697 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-11-07 04:12:17,697 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-11-07 04:12:17,697 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__weight [2019-11-07 04:12:17,698 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-11-07 04:12:17,698 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-11-07 04:12:17,698 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-11-07 04:12:17,698 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-11-07 04:12:17,698 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-11-07 04:12:17,699 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-11-07 04:12:17,699 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-11-07 04:12:17,699 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-11-07 04:12:17,699 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-11-07 04:12:17,699 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-11-07 04:12:17,699 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification3_spec__1 [2019-11-07 04:12:17,700 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification3_spec__2 [2019-11-07 04:12:17,700 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-11-07 04:12:17,700 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 04:12:17,700 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-07 04:12:17,700 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 04:12:23,113 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 04:12:23,113 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-11-07 04:12:23,115 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:12:23 BoogieIcfgContainer [2019-11-07 04:12:23,115 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 04:12:23,116 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 04:12:23,116 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 04:12:23,120 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 04:12:23,120 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 04:12:16" (1/3) ... [2019-11-07 04:12:23,121 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42f5443b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:12:23, skipping insertion in model container [2019-11-07 04:12:23,121 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:12:17" (2/3) ... [2019-11-07 04:12:23,121 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42f5443b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:12:23, skipping insertion in model container [2019-11-07 04:12:23,121 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:12:23" (3/3) ... [2019-11-07 04:12:23,123 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product25.cil.c [2019-11-07 04:12:23,133 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 04:12:23,143 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 04:12:23,155 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 04:12:23,188 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 04:12:23,188 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 04:12:23,188 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 04:12:23,188 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 04:12:23,189 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 04:12:23,189 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 04:12:23,189 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 04:12:23,189 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 04:12:23,226 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states. [2019-11-07 04:12:23,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-11-07 04:12:23,244 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:12:23,245 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:12:23,248 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:12:23,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:12:23,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1500061591, now seen corresponding path program 1 times [2019-11-07 04:12:23,264 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:12:23,265 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427045978] [2019-11-07 04:12:23,265 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:12:23,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:12:24,071 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-07 04:12:24,072 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427045978] [2019-11-07 04:12:24,073 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:12:24,073 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-07 04:12:24,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241578060] [2019-11-07 04:12:24,079 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-07 04:12:24,079 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:12:24,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-07 04:12:24,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-07 04:12:24,098 INFO L87 Difference]: Start difference. First operand 573 states. Second operand 8 states. [2019-11-07 04:12:27,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:12:27,438 INFO L93 Difference]: Finished difference Result 1614 states and 2480 transitions. [2019-11-07 04:12:27,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-07 04:12:27,441 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 98 [2019-11-07 04:12:27,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:12:27,470 INFO L225 Difference]: With dead ends: 1614 [2019-11-07 04:12:27,470 INFO L226 Difference]: Without dead ends: 1163 [2019-11-07 04:12:27,484 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2019-11-07 04:12:27,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1163 states. [2019-11-07 04:12:27,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1163 to 1153. [2019-11-07 04:12:27,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1153 states. [2019-11-07 04:12:27,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1153 states to 1153 states and 1725 transitions. [2019-11-07 04:12:27,684 INFO L78 Accepts]: Start accepts. Automaton has 1153 states and 1725 transitions. Word has length 98 [2019-11-07 04:12:27,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:12:27,687 INFO L462 AbstractCegarLoop]: Abstraction has 1153 states and 1725 transitions. [2019-11-07 04:12:27,687 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-07 04:12:27,687 INFO L276 IsEmpty]: Start isEmpty. Operand 1153 states and 1725 transitions. [2019-11-07 04:12:27,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-11-07 04:12:27,702 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:12:27,702 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:12:27,702 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:12:27,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:12:27,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1113138244, now seen corresponding path program 1 times [2019-11-07 04:12:27,703 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:12:27,703 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945934681] [2019-11-07 04:12:27,704 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:12:27,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:12:28,049 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-07 04:12:28,049 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945934681] [2019-11-07 04:12:28,050 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:12:28,050 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-07 04:12:28,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255427561] [2019-11-07 04:12:28,054 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-07 04:12:28,055 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:12:28,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-07 04:12:28,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-11-07 04:12:28,056 INFO L87 Difference]: Start difference. First operand 1153 states and 1725 transitions. Second operand 8 states. [2019-11-07 04:12:28,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:12:28,168 INFO L93 Difference]: Finished difference Result 2012 states and 3042 transitions. [2019-11-07 04:12:28,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-07 04:12:28,169 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 103 [2019-11-07 04:12:28,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:12:28,181 INFO L225 Difference]: With dead ends: 2012 [2019-11-07 04:12:28,181 INFO L226 Difference]: Without dead ends: 1171 [2019-11-07 04:12:28,188 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-11-07 04:12:28,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1171 states. [2019-11-07 04:12:28,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1171 to 1171. [2019-11-07 04:12:28,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1171 states. [2019-11-07 04:12:28,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1171 states to 1171 states and 1746 transitions. [2019-11-07 04:12:28,286 INFO L78 Accepts]: Start accepts. Automaton has 1171 states and 1746 transitions. Word has length 103 [2019-11-07 04:12:28,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:12:28,289 INFO L462 AbstractCegarLoop]: Abstraction has 1171 states and 1746 transitions. [2019-11-07 04:12:28,289 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-07 04:12:28,290 INFO L276 IsEmpty]: Start isEmpty. Operand 1171 states and 1746 transitions. [2019-11-07 04:12:28,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-11-07 04:12:28,297 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:12:28,300 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:12:28,301 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:12:28,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:12:28,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1868811998, now seen corresponding path program 1 times [2019-11-07 04:12:28,302 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:12:28,302 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645453055] [2019-11-07 04:12:28,302 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:12:28,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:12:28,624 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 04:12:28,624 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645453055] [2019-11-07 04:12:28,633 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062824696] [2019-11-07 04:12:28,635 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 [2019-11-07 04:12:29,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:12:29,463 INFO L256 TraceCheckSpWp]: Trace formula consists of 2981 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-07 04:12:29,502 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:12:29,655 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-07 04:12:29,655 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:12:29,722 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:12:29,869 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-07 04:12:29,869 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 04:12:29,869 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [7] total 12 [2019-11-07 04:12:29,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617451270] [2019-11-07 04:12:29,872 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 04:12:29,872 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:12:29,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 04:12:29,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2019-11-07 04:12:29,874 INFO L87 Difference]: Start difference. First operand 1171 states and 1746 transitions. Second operand 7 states. [2019-11-07 04:12:31,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:12:31,115 INFO L93 Difference]: Finished difference Result 2061 states and 3106 transitions. [2019-11-07 04:12:31,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 04:12:31,116 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 107 [2019-11-07 04:12:31,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:12:31,130 INFO L225 Difference]: With dead ends: 2061 [2019-11-07 04:12:31,130 INFO L226 Difference]: Without dead ends: 1207 [2019-11-07 04:12:31,138 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 208 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2019-11-07 04:12:31,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1207 states. [2019-11-07 04:12:31,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1207 to 1175. [2019-11-07 04:12:31,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1175 states. [2019-11-07 04:12:31,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1175 states to 1175 states and 1749 transitions. [2019-11-07 04:12:31,215 INFO L78 Accepts]: Start accepts. Automaton has 1175 states and 1749 transitions. Word has length 107 [2019-11-07 04:12:31,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:12:31,216 INFO L462 AbstractCegarLoop]: Abstraction has 1175 states and 1749 transitions. [2019-11-07 04:12:31,216 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 04:12:31,216 INFO L276 IsEmpty]: Start isEmpty. Operand 1175 states and 1749 transitions. [2019-11-07 04:12:31,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-11-07 04:12:31,227 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:12:31,227 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:12:31,435 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:12:31,436 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:12:31,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:12:31,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1196719180, now seen corresponding path program 1 times [2019-11-07 04:12:31,436 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:12:31,437 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344630733] [2019-11-07 04:12:31,437 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:12:31,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:12:31,631 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 04:12:31,632 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344630733] [2019-11-07 04:12:31,632 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036502211] [2019-11-07 04:12:31,632 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 [2019-11-07 04:12:32,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:12:32,226 INFO L256 TraceCheckSpWp]: Trace formula consists of 2970 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 04:12:32,233 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:12:32,270 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-07 04:12:32,270 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:12:32,431 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-07 04:12:32,431 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 04:12:32,432 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [7] total 10 [2019-11-07 04:12:32,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308044107] [2019-11-07 04:12:32,433 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 04:12:32,433 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:12:32,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 04:12:32,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-11-07 04:12:32,434 INFO L87 Difference]: Start difference. First operand 1175 states and 1749 transitions. Second operand 5 states. [2019-11-07 04:12:32,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:12:32,634 INFO L93 Difference]: Finished difference Result 2163 states and 3293 transitions. [2019-11-07 04:12:32,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 04:12:32,635 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 108 [2019-11-07 04:12:32,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:12:32,707 INFO L225 Difference]: With dead ends: 2163 [2019-11-07 04:12:32,707 INFO L226 Difference]: Without dead ends: 1175 [2019-11-07 04:12:32,714 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 214 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2019-11-07 04:12:32,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1175 states. [2019-11-07 04:12:32,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1175 to 1175. [2019-11-07 04:12:32,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1175 states. [2019-11-07 04:12:32,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1175 states to 1175 states and 1731 transitions. [2019-11-07 04:12:32,777 INFO L78 Accepts]: Start accepts. Automaton has 1175 states and 1731 transitions. Word has length 108 [2019-11-07 04:12:32,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:12:32,778 INFO L462 AbstractCegarLoop]: Abstraction has 1175 states and 1731 transitions. [2019-11-07 04:12:32,778 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 04:12:32,778 INFO L276 IsEmpty]: Start isEmpty. Operand 1175 states and 1731 transitions. [2019-11-07 04:12:32,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-11-07 04:12:32,781 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:12:32,781 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:12:32,993 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:12:32,994 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:12:32,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:12:32,994 INFO L82 PathProgramCache]: Analyzing trace with hash -287959244, now seen corresponding path program 1 times [2019-11-07 04:12:32,995 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:12:32,995 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368636719] [2019-11-07 04:12:32,995 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:12:33,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:12:33,235 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-07 04:12:33,236 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368636719] [2019-11-07 04:12:33,236 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367056012] [2019-11-07 04:12:33,236 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 [2019-11-07 04:12:33,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:12:33,784 INFO L256 TraceCheckSpWp]: Trace formula consists of 2980 conjuncts, 34 conjunts are in the unsatisfiable core [2019-11-07 04:12:33,791 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:12:33,840 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:12:33,858 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:12:33,930 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-07 04:12:33,930 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:12:34,104 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:12:34,276 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:12:34,280 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:12:34,434 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-07 04:12:34,434 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 04:12:34,434 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [7, 10] total 23 [2019-11-07 04:12:34,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671921723] [2019-11-07 04:12:34,435 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-07 04:12:34,436 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:12:34,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-07 04:12:34,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2019-11-07 04:12:34,436 INFO L87 Difference]: Start difference. First operand 1175 states and 1731 transitions. Second operand 10 states. [2019-11-07 04:12:40,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:12:40,189 INFO L93 Difference]: Finished difference Result 2910 states and 4402 transitions. [2019-11-07 04:12:40,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-07 04:12:40,190 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 110 [2019-11-07 04:12:40,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:12:40,215 INFO L225 Difference]: With dead ends: 2910 [2019-11-07 04:12:40,215 INFO L226 Difference]: Without dead ends: 2137 [2019-11-07 04:12:40,225 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=154, Invalid=902, Unknown=0, NotChecked=0, Total=1056 [2019-11-07 04:12:40,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2137 states. [2019-11-07 04:12:40,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2137 to 2020. [2019-11-07 04:12:40,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2020 states. [2019-11-07 04:12:40,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2020 states to 2020 states and 3016 transitions. [2019-11-07 04:12:40,422 INFO L78 Accepts]: Start accepts. Automaton has 2020 states and 3016 transitions. Word has length 110 [2019-11-07 04:12:40,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:12:40,426 INFO L462 AbstractCegarLoop]: Abstraction has 2020 states and 3016 transitions. [2019-11-07 04:12:40,426 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-07 04:12:40,427 INFO L276 IsEmpty]: Start isEmpty. Operand 2020 states and 3016 transitions. [2019-11-07 04:12:40,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-11-07 04:12:40,431 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:12:40,432 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:12:40,642 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:12:40,643 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:12:40,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:12:40,643 INFO L82 PathProgramCache]: Analyzing trace with hash -43094052, now seen corresponding path program 1 times [2019-11-07 04:12:40,644 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:12:40,644 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757397751] [2019-11-07 04:12:40,644 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:12:40,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:12:41,007 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-07 04:12:41,007 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757397751] [2019-11-07 04:12:41,008 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796829101] [2019-11-07 04:12:41,008 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 [2019-11-07 04:12:41,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:12:41,571 INFO L256 TraceCheckSpWp]: Trace formula consists of 2981 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 04:12:41,576 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:12:41,613 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-07 04:12:41,613 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:12:41,729 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-07 04:12:41,730 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 04:12:41,730 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 8 [2019-11-07 04:12:41,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000155471] [2019-11-07 04:12:41,732 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 04:12:41,733 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:12:41,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 04:12:41,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-11-07 04:12:41,733 INFO L87 Difference]: Start difference. First operand 2020 states and 3016 transitions. Second operand 3 states. [2019-11-07 04:12:41,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:12:41,983 INFO L93 Difference]: Finished difference Result 5789 states and 8901 transitions. [2019-11-07 04:12:41,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 04:12:41,984 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 111 [2019-11-07 04:12:41,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:12:42,018 INFO L225 Difference]: With dead ends: 5789 [2019-11-07 04:12:42,018 INFO L226 Difference]: Without dead ends: 3800 [2019-11-07 04:12:42,033 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-11-07 04:12:42,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3800 states. [2019-11-07 04:12:42,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3800 to 3677. [2019-11-07 04:12:42,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3677 states. [2019-11-07 04:12:42,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3677 states to 3677 states and 5541 transitions. [2019-11-07 04:12:42,272 INFO L78 Accepts]: Start accepts. Automaton has 3677 states and 5541 transitions. Word has length 111 [2019-11-07 04:12:42,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:12:42,274 INFO L462 AbstractCegarLoop]: Abstraction has 3677 states and 5541 transitions. [2019-11-07 04:12:42,274 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 04:12:42,274 INFO L276 IsEmpty]: Start isEmpty. Operand 3677 states and 5541 transitions. [2019-11-07 04:12:42,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-11-07 04:12:42,277 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:12:42,277 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:12:42,485 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:12:42,485 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:12:42,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:12:42,486 INFO L82 PathProgramCache]: Analyzing trace with hash -191467676, now seen corresponding path program 1 times [2019-11-07 04:12:42,486 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:12:42,486 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774893069] [2019-11-07 04:12:42,486 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:12:42,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:12:42,734 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 04:12:42,735 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774893069] [2019-11-07 04:12:42,736 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059966805] [2019-11-07 04:12:42,736 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 [2019-11-07 04:12:43,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:12:43,394 INFO L256 TraceCheckSpWp]: Trace formula consists of 2970 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-07 04:12:43,399 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:12:43,423 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-07 04:12:43,423 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:12:43,519 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-07 04:12:43,520 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 04:12:43,520 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [11] total 12 [2019-11-07 04:12:43,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343247930] [2019-11-07 04:12:43,521 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 04:12:43,521 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:12:43,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 04:12:43,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-11-07 04:12:43,521 INFO L87 Difference]: Start difference. First operand 3677 states and 5541 transitions. Second operand 3 states. [2019-11-07 04:12:43,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:12:43,781 INFO L93 Difference]: Finished difference Result 8236 states and 12606 transitions. [2019-11-07 04:12:43,781 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 04:12:43,781 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 110 [2019-11-07 04:12:43,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:12:43,818 INFO L225 Difference]: With dead ends: 8236 [2019-11-07 04:12:43,819 INFO L226 Difference]: Without dead ends: 4590 [2019-11-07 04:12:43,843 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 222 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-11-07 04:12:43,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4590 states. [2019-11-07 04:12:44,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4590 to 4480. [2019-11-07 04:12:44,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4480 states. [2019-11-07 04:12:44,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4480 states to 4480 states and 6770 transitions. [2019-11-07 04:12:44,108 INFO L78 Accepts]: Start accepts. Automaton has 4480 states and 6770 transitions. Word has length 110 [2019-11-07 04:12:44,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:12:44,110 INFO L462 AbstractCegarLoop]: Abstraction has 4480 states and 6770 transitions. [2019-11-07 04:12:44,111 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 04:12:44,111 INFO L276 IsEmpty]: Start isEmpty. Operand 4480 states and 6770 transitions. [2019-11-07 04:12:44,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-11-07 04:12:44,115 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:12:44,116 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-07 04:12:44,325 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:12:44,325 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:12:44,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:12:44,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1202175783, now seen corresponding path program 1 times [2019-11-07 04:12:44,326 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:12:44,326 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201593057] [2019-11-07 04:12:44,326 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:12:44,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:12:44,510 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-07 04:12:44,511 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201593057] [2019-11-07 04:12:44,511 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621048485] [2019-11-07 04:12:44,511 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 [2019-11-07 04:12:45,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:12:45,213 INFO L256 TraceCheckSpWp]: Trace formula consists of 3052 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-07 04:12:45,228 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:12:45,298 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-07 04:12:45,298 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:12:45,435 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-07 04:12:45,436 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 04:12:45,436 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 5] total 10 [2019-11-07 04:12:45,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578105724] [2019-11-07 04:12:45,437 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 04:12:45,437 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:12:45,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 04:12:45,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2019-11-07 04:12:45,437 INFO L87 Difference]: Start difference. First operand 4480 states and 6770 transitions. Second operand 5 states. [2019-11-07 04:12:45,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:12:45,671 INFO L93 Difference]: Finished difference Result 8496 states and 13038 transitions. [2019-11-07 04:12:45,671 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 04:12:45,672 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 130 [2019-11-07 04:12:45,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:12:45,716 INFO L225 Difference]: With dead ends: 8496 [2019-11-07 04:12:45,716 INFO L226 Difference]: Without dead ends: 4576 [2019-11-07 04:12:45,746 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 257 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2019-11-07 04:12:45,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4576 states. [2019-11-07 04:12:45,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4576 to 4534. [2019-11-07 04:12:45,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4534 states. [2019-11-07 04:12:46,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4534 states to 4534 states and 6858 transitions. [2019-11-07 04:12:46,012 INFO L78 Accepts]: Start accepts. Automaton has 4534 states and 6858 transitions. Word has length 130 [2019-11-07 04:12:46,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:12:46,012 INFO L462 AbstractCegarLoop]: Abstraction has 4534 states and 6858 transitions. [2019-11-07 04:12:46,013 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 04:12:46,013 INFO L276 IsEmpty]: Start isEmpty. Operand 4534 states and 6858 transitions. [2019-11-07 04:12:46,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-11-07 04:12:46,020 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:12:46,021 INFO L410 BasicCegarLoop]: trace histogram [5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:12:46,229 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:12:46,230 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:12:46,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:12:46,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1336885174, now seen corresponding path program 1 times [2019-11-07 04:12:46,230 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:12:46,230 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010358112] [2019-11-07 04:12:46,231 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:12:46,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:12:46,842 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2019-11-07 04:12:46,845 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010358112] [2019-11-07 04:12:46,845 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889857637] [2019-11-07 04:12:46,845 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 [2019-11-07 04:12:47,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:12:47,778 INFO L256 TraceCheckSpWp]: Trace formula consists of 3114 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 04:12:47,786 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:12:47,867 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-11-07 04:12:47,868 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:12:47,994 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-11-07 04:12:47,994 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 04:12:47,995 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 4] total 10 [2019-11-07 04:12:47,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914096236] [2019-11-07 04:12:47,995 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 04:12:47,996 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:12:47,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 04:12:47,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-11-07 04:12:47,996 INFO L87 Difference]: Start difference. First operand 4534 states and 6858 transitions. Second operand 4 states. [2019-11-07 04:12:48,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:12:48,285 INFO L93 Difference]: Finished difference Result 9159 states and 14097 transitions. [2019-11-07 04:12:48,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 04:12:48,285 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 161 [2019-11-07 04:12:48,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:12:48,318 INFO L225 Difference]: With dead ends: 9159 [2019-11-07 04:12:48,319 INFO L226 Difference]: Without dead ends: 4534 [2019-11-07 04:12:48,346 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 320 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2019-11-07 04:12:48,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4534 states.