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_product09.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 03:09:04,925 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 03:09:04,928 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 03:09:04,945 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 03:09:04,946 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 03:09:04,947 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 03:09:04,948 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 03:09:04,950 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 03:09:04,952 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 03:09:04,953 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 03:09:04,954 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 03:09:04,955 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 03:09:04,955 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 03:09:04,956 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 03:09:04,957 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 03:09:04,958 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 03:09:04,959 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 03:09:04,960 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 03:09:04,962 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 03:09:04,964 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 03:09:04,966 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 03:09:04,967 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 03:09:04,968 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 03:09:04,969 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 03:09:04,972 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 03:09:04,972 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 03:09:04,972 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 03:09:04,973 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 03:09:04,974 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 03:09:04,975 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 03:09:04,976 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 03:09:04,976 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 03:09:04,977 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 03:09:04,978 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 03:09:04,980 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 03:09:04,980 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 03:09:04,981 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 03:09:04,981 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 03:09:04,981 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 03:09:04,982 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 03:09:04,983 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 03:09:04,984 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 03:09:05,000 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 03:09:05,000 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 03:09:05,003 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 03:09:05,004 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 03:09:05,004 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 03:09:05,004 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 03:09:05,004 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 03:09:05,005 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 03:09:05,005 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 03:09:05,005 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 03:09:05,005 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 03:09:05,005 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 03:09:05,006 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 03:09:05,006 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 03:09:05,006 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 03:09:05,006 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 03:09:05,006 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 03:09:05,007 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 03:09:05,007 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 03:09:05,007 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 03:09:05,007 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 03:09:05,007 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 03:09:05,008 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 03:09:05,008 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 03:09:05,008 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 03:09:05,008 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 03:09:05,009 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 03:09:05,009 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 03:09:05,009 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 [2019-10-15 03:09:05,312 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 03:09:05,334 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 03:09:05,339 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 03:09:05,340 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 03:09:05,341 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 03:09:05,341 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec3_product09.cil.c [2019-10-15 03:09:05,420 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/685dd80d8/d54ab54d402b4df69274224da4a75dbb/FLAG0d5d11dd1 [2019-10-15 03:09:06,128 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 03:09:06,129 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec3_product09.cil.c [2019-10-15 03:09:06,171 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/685dd80d8/d54ab54d402b4df69274224da4a75dbb/FLAG0d5d11dd1 [2019-10-15 03:09:06,278 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/685dd80d8/d54ab54d402b4df69274224da4a75dbb [2019-10-15 03:09:06,292 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 03:09:06,294 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 03:09:06,296 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 03:09:06,296 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 03:09:06,300 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 03:09:06,301 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:09:06" (1/1) ... [2019-10-15 03:09:06,305 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c3ebb7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:09:06, skipping insertion in model container [2019-10-15 03:09:06,305 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:09:06" (1/1) ... [2019-10-15 03:09:06,315 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 03:09:06,401 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 03:09:07,211 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:09:07,232 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 03:09:07,432 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:09:07,516 INFO L192 MainTranslator]: Completed translation [2019-10-15 03:09:07,517 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:09:07 WrapperNode [2019-10-15 03:09:07,517 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 03:09:07,518 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 03:09:07,518 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 03:09:07,519 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 03:09:07,540 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:09:07" (1/1) ... [2019-10-15 03:09:07,541 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:09:07" (1/1) ... [2019-10-15 03:09:07,618 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:09:07" (1/1) ... [2019-10-15 03:09:07,618 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:09:07" (1/1) ... [2019-10-15 03:09:07,681 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:09:07" (1/1) ... [2019-10-15 03:09:07,729 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:09:07" (1/1) ... [2019-10-15 03:09:07,743 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:09:07" (1/1) ... [2019-10-15 03:09:07,768 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 03:09:07,770 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 03:09:07,770 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 03:09:07,771 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 03:09:07,772 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:09:07" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 03:09:07,855 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 03:09:07,855 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 03:09:07,856 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-15 03:09:07,856 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-10-15 03:09:07,857 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-10-15 03:09:07,858 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-15 03:09:07,859 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-10-15 03:09:07,859 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-10-15 03:09:07,859 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-10-15 03:09:07,860 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-10-15 03:09:07,860 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-10-15 03:09:07,861 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-10-15 03:09:07,861 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-10-15 03:09:07,861 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-10-15 03:09:07,862 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-10-15 03:09:07,862 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-10-15 03:09:07,864 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-10-15 03:09:07,864 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-15 03:09:07,865 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-10-15 03:09:07,866 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-10-15 03:09:07,866 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-10-15 03:09:07,867 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-10-15 03:09:07,867 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-10-15 03:09:07,867 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-10-15 03:09:07,868 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-10-15 03:09:07,868 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-10-15 03:09:07,868 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-10-15 03:09:07,868 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-10-15 03:09:07,868 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-10-15 03:09:07,869 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-10-15 03:09:07,869 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-10-15 03:09:07,870 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-10-15 03:09:07,870 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-10-15 03:09:07,870 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-10-15 03:09:07,870 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-10-15 03:09:07,871 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-10-15 03:09:07,871 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-10-15 03:09:07,871 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-10-15 03:09:07,871 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-10-15 03:09:07,871 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-15 03:09:07,871 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-10-15 03:09:07,872 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-10-15 03:09:07,872 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-15 03:09:07,872 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-15 03:09:07,873 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-15 03:09:07,873 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-15 03:09:07,873 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-10-15 03:09:07,873 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-10-15 03:09:07,873 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-10-15 03:09:07,873 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-10-15 03:09:07,874 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-10-15 03:09:07,874 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-10-15 03:09:07,874 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-10-15 03:09:07,874 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-10-15 03:09:07,874 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-15 03:09:07,875 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-10-15 03:09:07,875 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-10-15 03:09:07,875 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-10-15 03:09:07,875 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-15 03:09:07,876 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-10-15 03:09:07,876 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-15 03:09:07,877 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-15 03:09:07,877 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 03:09:07,877 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification3_spec__1 [2019-10-15 03:09:07,877 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification3_spec__2 [2019-10-15 03:09:07,877 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-15 03:09:07,878 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-15 03:09:07,878 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-15 03:09:07,878 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-15 03:09:07,878 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-15 03:09:07,878 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-15 03:09:07,879 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 03:09:07,879 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 03:09:07,880 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-10-15 03:09:07,880 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-10-15 03:09:07,880 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-15 03:09:07,881 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-10-15 03:09:07,881 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-10-15 03:09:07,881 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-10-15 03:09:07,882 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-10-15 03:09:07,882 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-10-15 03:09:07,883 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-10-15 03:09:07,883 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-10-15 03:09:07,883 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-10-15 03:09:07,883 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-15 03:09:07,883 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-15 03:09:07,884 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-10-15 03:09:07,885 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-10-15 03:09:07,885 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-10-15 03:09:07,885 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-10-15 03:09:07,885 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-10-15 03:09:07,885 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-10-15 03:09:07,886 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-10-15 03:09:07,886 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-10-15 03:09:07,886 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-10-15 03:09:07,886 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-15 03:09:07,886 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-15 03:09:07,886 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-10-15 03:09:07,887 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-10-15 03:09:07,887 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-10-15 03:09:07,887 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-10-15 03:09:07,887 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-10-15 03:09:07,887 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-10-15 03:09:07,887 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-10-15 03:09:07,888 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-10-15 03:09:07,888 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-10-15 03:09:07,888 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-10-15 03:09:07,888 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-10-15 03:09:07,888 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-10-15 03:09:07,889 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-10-15 03:09:07,889 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-10-15 03:09:07,889 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-10-15 03:09:07,889 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-10-15 03:09:07,889 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-10-15 03:09:07,890 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-10-15 03:09:07,890 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification3_spec__1 [2019-10-15 03:09:07,890 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification3_spec__2 [2019-10-15 03:09:07,891 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 03:09:07,891 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-10-15 03:09:07,891 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-15 03:09:07,892 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-15 03:09:07,892 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-15 03:09:07,892 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-15 03:09:07,892 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 03:09:07,893 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-10-15 03:09:07,893 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-10-15 03:09:07,894 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-10-15 03:09:07,894 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-10-15 03:09:07,894 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-10-15 03:09:07,894 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-10-15 03:09:07,895 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-10-15 03:09:07,895 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-10-15 03:09:07,896 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-10-15 03:09:07,896 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-15 03:09:07,899 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-10-15 03:09:07,900 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-15 03:09:07,900 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-15 03:09:07,900 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 03:09:07,901 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-15 03:09:07,901 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-15 03:09:07,901 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-15 03:09:07,901 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-15 03:09:07,902 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-15 03:09:07,902 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-15 03:09:07,911 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 03:09:07,911 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-15 03:09:07,912 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-15 03:09:07,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 03:09:07,912 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-15 03:09:07,914 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-15 03:09:07,914 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 03:09:07,914 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-15 03:09:07,915 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-15 03:09:07,915 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-15 03:09:07,915 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 03:09:07,915 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-15 03:09:07,915 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 03:09:14,085 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 03:09:14,085 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-15 03:09:14,087 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:09:14 BoogieIcfgContainer [2019-10-15 03:09:14,087 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 03:09:14,090 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 03:09:14,090 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 03:09:14,095 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 03:09:14,095 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 03:09:06" (1/3) ... [2019-10-15 03:09:14,096 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ab86ace and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:09:14, skipping insertion in model container [2019-10-15 03:09:14,096 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:09:07" (2/3) ... [2019-10-15 03:09:14,097 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ab86ace and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:09:14, skipping insertion in model container [2019-10-15 03:09:14,097 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:09:14" (3/3) ... [2019-10-15 03:09:14,101 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product09.cil.c [2019-10-15 03:09:14,115 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 03:09:14,129 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 03:09:14,142 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 03:09:14,176 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 03:09:14,177 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 03:09:14,177 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 03:09:14,177 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 03:09:14,177 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 03:09:14,177 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 03:09:14,178 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 03:09:14,178 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 03:09:14,225 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states. [2019-10-15 03:09:14,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-10-15 03:09:14,245 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:09:14,246 INFO L380 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] [2019-10-15 03:09:14,248 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:09:14,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:09:14,254 INFO L82 PathProgramCache]: Analyzing trace with hash -843125818, now seen corresponding path program 1 times [2019-10-15 03:09:14,264 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:09:14,264 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550190563] [2019-10-15 03:09:14,264 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:09:14,265 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:09:14,265 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:09:14,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:09:15,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 03:09:15,258 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550190563] [2019-10-15 03:09:15,260 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802220526] [2019-10-15 03:09:15,260 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:09:15,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:09:15,945 INFO L256 TraceCheckSpWp]: Trace formula consists of 2911 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-15 03:09:16,048 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:09:16,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:09:16,165 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:09:16,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 03:09:16,503 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 03:09:16,504 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [11] total 12 [2019-10-15 03:09:16,504 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796818355] [2019-10-15 03:09:16,515 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:09:16,515 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:09:16,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:09:16,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-10-15 03:09:16,534 INFO L87 Difference]: Start difference. First operand 561 states. Second operand 3 states. [2019-10-15 03:09:16,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:09:16,777 INFO L93 Difference]: Finished difference Result 1203 states and 1865 transitions. [2019-10-15 03:09:16,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:09:16,779 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 98 [2019-10-15 03:09:16,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:09:16,808 INFO L225 Difference]: With dead ends: 1203 [2019-10-15 03:09:16,808 INFO L226 Difference]: Without dead ends: 774 [2019-10-15 03:09:16,819 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 198 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-10-15 03:09:16,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2019-10-15 03:09:16,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 761. [2019-10-15 03:09:16,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 761 states. [2019-10-15 03:09:17,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 761 states to 761 states and 1165 transitions. [2019-10-15 03:09:17,011 INFO L78 Accepts]: Start accepts. Automaton has 761 states and 1165 transitions. Word has length 98 [2019-10-15 03:09:17,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:09:17,015 INFO L462 AbstractCegarLoop]: Abstraction has 761 states and 1165 transitions. [2019-10-15 03:09:17,015 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:09:17,015 INFO L276 IsEmpty]: Start isEmpty. Operand 761 states and 1165 transitions. [2019-10-15 03:09:17,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-10-15 03:09:17,031 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:09:17,031 INFO L380 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] [2019-10-15 03:09:17,236 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:09:17,237 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:09:17,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:09:17,238 INFO L82 PathProgramCache]: Analyzing trace with hash -846004538, now seen corresponding path program 1 times [2019-10-15 03:09:17,238 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:09:17,239 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031547972] [2019-10-15 03:09:17,239 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:09:17,239 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:09:17,240 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:09:17,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:09:17,788 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 03:09:17,789 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031547972] [2019-10-15 03:09:17,789 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:09:17,789 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-15 03:09:17,790 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198056981] [2019-10-15 03:09:17,793 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-15 03:09:17,794 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:09:17,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-15 03:09:17,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-10-15 03:09:17,795 INFO L87 Difference]: Start difference. First operand 761 states and 1165 transitions. Second operand 8 states. [2019-10-15 03:09:17,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:09:17,952 INFO L93 Difference]: Finished difference Result 1505 states and 2333 transitions. [2019-10-15 03:09:17,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 03:09:17,953 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 99 [2019-10-15 03:09:17,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:09:17,962 INFO L225 Difference]: With dead ends: 1505 [2019-10-15 03:09:17,962 INFO L226 Difference]: Without dead ends: 775 [2019-10-15 03:09:17,969 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-10-15 03:09:17,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2019-10-15 03:09:18,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 769. [2019-10-15 03:09:18,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 769 states. [2019-10-15 03:09:18,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 769 states to 769 states and 1173 transitions. [2019-10-15 03:09:18,080 INFO L78 Accepts]: Start accepts. Automaton has 769 states and 1173 transitions. Word has length 99 [2019-10-15 03:09:18,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:09:18,081 INFO L462 AbstractCegarLoop]: Abstraction has 769 states and 1173 transitions. [2019-10-15 03:09:18,081 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-15 03:09:18,081 INFO L276 IsEmpty]: Start isEmpty. Operand 769 states and 1173 transitions. [2019-10-15 03:09:18,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-10-15 03:09:18,088 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:09:18,089 INFO L380 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] [2019-10-15 03:09:18,090 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:09:18,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:09:18,091 INFO L82 PathProgramCache]: Analyzing trace with hash 535744625, now seen corresponding path program 1 times [2019-10-15 03:09:18,091 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:09:18,091 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018740702] [2019-10-15 03:09:18,091 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:09:18,091 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:09:18,092 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:09:18,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:09:18,425 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-15 03:09:18,426 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018740702] [2019-10-15 03:09:18,426 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711439419] [2019-10-15 03:09:18,427 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:09:19,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:09:19,130 INFO L256 TraceCheckSpWp]: Trace formula consists of 2933 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 03:09:19,154 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:09:19,242 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 03:09:19,243 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:09:19,469 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 03:09:19,469 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 03:09:19,470 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [7] total 10 [2019-10-15 03:09:19,470 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445753312] [2019-10-15 03:09:19,472 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 03:09:19,472 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:09:19,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 03:09:19,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-10-15 03:09:19,474 INFO L87 Difference]: Start difference. First operand 769 states and 1173 transitions. Second operand 5 states. [2019-10-15 03:09:22,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:09:22,022 INFO L93 Difference]: Finished difference Result 2894 states and 4479 transitions. [2019-10-15 03:09:22,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 03:09:22,022 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 103 [2019-10-15 03:09:22,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:09:22,040 INFO L225 Difference]: With dead ends: 2894 [2019-10-15 03:09:22,040 INFO L226 Difference]: Without dead ends: 2156 [2019-10-15 03:09:22,047 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 205 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-10-15 03:09:22,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2156 states. [2019-10-15 03:09:22,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2156 to 2106. [2019-10-15 03:09:22,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2106 states. [2019-10-15 03:09:22,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2106 states to 2106 states and 3172 transitions. [2019-10-15 03:09:22,184 INFO L78 Accepts]: Start accepts. Automaton has 2106 states and 3172 transitions. Word has length 103 [2019-10-15 03:09:22,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:09:22,185 INFO L462 AbstractCegarLoop]: Abstraction has 2106 states and 3172 transitions. [2019-10-15 03:09:22,185 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 03:09:22,185 INFO L276 IsEmpty]: Start isEmpty. Operand 2106 states and 3172 transitions. [2019-10-15 03:09:22,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-10-15 03:09:22,189 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:09:22,189 INFO L380 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] [2019-10-15 03:09:22,398 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:09:22,399 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:09:22,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:09:22,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1662512205, now seen corresponding path program 1 times [2019-10-15 03:09:22,400 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:09:22,400 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215175905] [2019-10-15 03:09:22,400 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:09:22,401 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:09:22,401 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:09:22,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:09:22,656 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-15 03:09:22,656 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215175905] [2019-10-15 03:09:22,656 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489435107] [2019-10-15 03:09:22,657 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:09:23,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:09:23,324 INFO L256 TraceCheckSpWp]: Trace formula consists of 2949 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-15 03:09:23,337 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:09:23,438 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 03:09:23,438 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:09:23,505 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:09:23,708 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 03:09:23,708 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 03:09:23,708 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [7] total 12 [2019-10-15 03:09:23,709 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496325259] [2019-10-15 03:09:23,709 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-15 03:09:23,710 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:09:23,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-15 03:09:23,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2019-10-15 03:09:23,710 INFO L87 Difference]: Start difference. First operand 2106 states and 3172 transitions. Second operand 7 states. [2019-10-15 03:09:24,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:09:24,757 INFO L93 Difference]: Finished difference Result 3905 states and 5917 transitions. [2019-10-15 03:09:24,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 03:09:24,758 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 107 [2019-10-15 03:09:24,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:09:24,777 INFO L225 Difference]: With dead ends: 3905 [2019-10-15 03:09:24,778 INFO L226 Difference]: Without dead ends: 2348 [2019-10-15 03:09:24,788 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 208 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2019-10-15 03:09:24,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2348 states. [2019-10-15 03:09:24,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2348 to 2250. [2019-10-15 03:09:24,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2250 states. [2019-10-15 03:09:25,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2250 states to 2250 states and 3372 transitions. [2019-10-15 03:09:25,009 INFO L78 Accepts]: Start accepts. Automaton has 2250 states and 3372 transitions. Word has length 107 [2019-10-15 03:09:25,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:09:25,009 INFO L462 AbstractCegarLoop]: Abstraction has 2250 states and 3372 transitions. [2019-10-15 03:09:25,009 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-15 03:09:25,009 INFO L276 IsEmpty]: Start isEmpty. Operand 2250 states and 3372 transitions. [2019-10-15 03:09:25,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-10-15 03:09:25,013 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:09:25,013 INFO L380 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] [2019-10-15 03:09:25,221 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:09:25,222 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:09:25,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:09:25,222 INFO L82 PathProgramCache]: Analyzing trace with hash 929761059, now seen corresponding path program 1 times [2019-10-15 03:09:25,223 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:09:25,223 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530096787] [2019-10-15 03:09:25,223 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:09:25,224 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:09:25,224 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:09:25,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:09:25,456 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-15 03:09:25,457 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530096787] [2019-10-15 03:09:25,457 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638876745] [2019-10-15 03:09:25,458 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:09:26,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:09:26,028 INFO L256 TraceCheckSpWp]: Trace formula consists of 2938 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 03:09:26,034 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:09:26,068 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 03:09:26,068 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:09:26,409 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 03:09:26,409 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 03:09:26,410 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [7] total 10 [2019-10-15 03:09:26,410 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247812266] [2019-10-15 03:09:26,411 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 03:09:26,412 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:09:26,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 03:09:26,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-10-15 03:09:26,413 INFO L87 Difference]: Start difference. First operand 2250 states and 3372 transitions. Second operand 5 states. [2019-10-15 03:09:26,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:09:26,668 INFO L93 Difference]: Finished difference Result 4247 states and 6472 transitions. [2019-10-15 03:09:26,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 03:09:26,669 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 108 [2019-10-15 03:09:26,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:09:26,690 INFO L225 Difference]: With dead ends: 4247 [2019-10-15 03:09:26,691 INFO L226 Difference]: Without dead ends: 2250 [2019-10-15 03:09:26,706 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 214 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2019-10-15 03:09:26,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2250 states. [2019-10-15 03:09:26,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2250 to 2250. [2019-10-15 03:09:26,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2250 states. [2019-10-15 03:09:26,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2250 states to 2250 states and 3330 transitions. [2019-10-15 03:09:26,865 INFO L78 Accepts]: Start accepts. Automaton has 2250 states and 3330 transitions. Word has length 108 [2019-10-15 03:09:26,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:09:26,866 INFO L462 AbstractCegarLoop]: Abstraction has 2250 states and 3330 transitions. [2019-10-15 03:09:26,866 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 03:09:26,866 INFO L276 IsEmpty]: Start isEmpty. Operand 2250 states and 3330 transitions. [2019-10-15 03:09:26,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-10-15 03:09:26,874 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:09:26,875 INFO L380 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] [2019-10-15 03:09:27,085 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:09:27,086 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:09:27,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:09:27,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1432817663, now seen corresponding path program 1 times [2019-10-15 03:09:27,090 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:09:27,091 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606207023] [2019-10-15 03:09:27,092 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:09:27,092 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:09:27,092 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:09:27,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:09:27,477 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-15 03:09:27,478 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606207023] [2019-10-15 03:09:27,478 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550827369] [2019-10-15 03:09:27,478 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:09:28,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:09:28,204 INFO L256 TraceCheckSpWp]: Trace formula consists of 2948 conjuncts, 20 conjunts are in the unsatisfiable core [2019-10-15 03:09:28,216 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:09:28,592 WARN L191 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2019-10-15 03:09:28,668 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 03:09:28,668 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:09:28,885 WARN L191 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2019-10-15 03:09:29,234 WARN L191 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 13 [2019-10-15 03:09:29,708 WARN L191 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 13 [2019-10-15 03:09:29,739 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:09:29,739 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:09:29,740 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:09:29,741 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:09:29,742 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:09:29,872 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-15 03:09:29,873 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 03:09:29,873 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7] total 13 [2019-10-15 03:09:29,873 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819929099] [2019-10-15 03:09:29,874 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 03:09:29,875 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:09:29,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 03:09:29,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2019-10-15 03:09:29,876 INFO L87 Difference]: Start difference. First operand 2250 states and 3330 transitions. Second operand 6 states. [2019-10-15 03:09:32,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:09:32,092 INFO L93 Difference]: Finished difference Result 6605 states and 9985 transitions. [2019-10-15 03:09:32,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-15 03:09:32,092 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 110 [2019-10-15 03:09:32,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:09:32,126 INFO L225 Difference]: With dead ends: 6605 [2019-10-15 03:09:32,126 INFO L226 Difference]: Without dead ends: 4386 [2019-10-15 03:09:32,142 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 216 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2019-10-15 03:09:32,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4386 states. [2019-10-15 03:09:32,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4386 to 4230. [2019-10-15 03:09:32,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4230 states. [2019-10-15 03:09:32,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4230 states to 4230 states and 6339 transitions. [2019-10-15 03:09:32,355 INFO L78 Accepts]: Start accepts. Automaton has 4230 states and 6339 transitions. Word has length 110 [2019-10-15 03:09:32,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:09:32,356 INFO L462 AbstractCegarLoop]: Abstraction has 4230 states and 6339 transitions. [2019-10-15 03:09:32,356 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 03:09:32,356 INFO L276 IsEmpty]: Start isEmpty. Operand 4230 states and 6339 transitions. [2019-10-15 03:09:32,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-10-15 03:09:32,360 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:09:32,361 INFO L380 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, 1] [2019-10-15 03:09:32,570 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:09:32,571 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:09:32,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:09:32,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1731626062, now seen corresponding path program 1 times [2019-10-15 03:09:32,572 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:09:32,573 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617375429] [2019-10-15 03:09:32,573 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:09:32,573 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:09:32,573 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:09:32,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:09:32,886 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 03:09:32,886 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617375429] [2019-10-15 03:09:32,886 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:09:32,887 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-15 03:09:32,887 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607970353] [2019-10-15 03:09:32,887 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-15 03:09:32,888 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:09:32,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-15 03:09:32,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-15 03:09:32,888 INFO L87 Difference]: Start difference. First operand 4230 states and 6339 transitions. Second operand 8 states. [2019-10-15 03:09:37,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:09:37,054 INFO L93 Difference]: Finished difference Result 10918 states and 16571 transitions. [2019-10-15 03:09:37,056 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-15 03:09:37,057 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 112 [2019-10-15 03:09:37,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:09:37,109 INFO L225 Difference]: With dead ends: 10918 [2019-10-15 03:09:37,109 INFO L226 Difference]: Without dead ends: 6719 [2019-10-15 03:09:37,134 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2019-10-15 03:09:37,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6719 states. [2019-10-15 03:09:37,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6719 to 6695. [2019-10-15 03:09:37,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6695 states. [2019-10-15 03:09:37,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6695 states to 6695 states and 10154 transitions. [2019-10-15 03:09:37,507 INFO L78 Accepts]: Start accepts. Automaton has 6695 states and 10154 transitions. Word has length 112 [2019-10-15 03:09:37,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:09:37,508 INFO L462 AbstractCegarLoop]: Abstraction has 6695 states and 10154 transitions. [2019-10-15 03:09:37,508 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-15 03:09:37,508 INFO L276 IsEmpty]: Start isEmpty. Operand 6695 states and 10154 transitions. [2019-10-15 03:09:37,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-10-15 03:09:37,511 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:09:37,512 INFO L380 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] [2019-10-15 03:09:37,512 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:09:37,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:09:37,512 INFO L82 PathProgramCache]: Analyzing trace with hash -701252849, now seen corresponding path program 1 times [2019-10-15 03:09:37,513 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:09:37,513 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805728857] [2019-10-15 03:09:37,513 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:09:37,513 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:09:37,513 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:09:37,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:09:37,719 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-15 03:09:37,720 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805728857] [2019-10-15 03:09:37,721 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427270628] [2019-10-15 03:09:37,721 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:09:38,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:09:38,460 INFO L256 TraceCheckSpWp]: Trace formula consists of 2938 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-15 03:09:38,467 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:09:38,497 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 03:09:38,497 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:09:38,629 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 03:09:38,635 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 03:09:38,636 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [11] total 12 [2019-10-15 03:09:38,636 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916990058] [2019-10-15 03:09:38,640 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:09:38,641 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:09:38,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:09:38,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-10-15 03:09:38,641 INFO L87 Difference]: Start difference. First operand 6695 states and 10154 transitions. Second operand 3 states. [2019-10-15 03:09:39,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:09:39,069 INFO L93 Difference]: Finished difference Result 15051 states and 23261 transitions. [2019-10-15 03:09:39,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:09:39,069 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 110 [2019-10-15 03:09:39,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:09:39,163 INFO L225 Difference]: With dead ends: 15051 [2019-10-15 03:09:39,163 INFO L226 Difference]: Without dead ends: 8387 [2019-10-15 03:09:39,206 INFO L600 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 [2019-10-15 03:09:39,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8387 states. [2019-10-15 03:09:39,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8387 to 8173. [2019-10-15 03:09:39,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8173 states. [2019-10-15 03:09:39,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8173 states to 8173 states and 12360 transitions. [2019-10-15 03:09:39,649 INFO L78 Accepts]: Start accepts. Automaton has 8173 states and 12360 transitions. Word has length 110 [2019-10-15 03:09:39,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:09:39,650 INFO L462 AbstractCegarLoop]: Abstraction has 8173 states and 12360 transitions. [2019-10-15 03:09:39,650 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:09:39,650 INFO L276 IsEmpty]: Start isEmpty. Operand 8173 states and 12360 transitions. [2019-10-15 03:09:39,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-10-15 03:09:39,655 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:09:39,655 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:09:39,856 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:09:39,857 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:09:39,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:09:39,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1650288734, now seen corresponding path program 1 times [2019-10-15 03:09:39,858 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:09:39,858 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364229791] [2019-10-15 03:09:39,858 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:09:39,858 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:09:39,859 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:09:39,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:09:40,196 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-15 03:09:40,196 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364229791] [2019-10-15 03:09:40,196 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252153119] [2019-10-15 03:09:40,197 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:09:41,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:09:41,623 INFO L256 TraceCheckSpWp]: Trace formula consists of 2964 conjuncts, 20 conjunts are in the unsatisfiable core [2019-10-15 03:09:41,630 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:09:41,785 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2019-10-15 03:09:41,840 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-15 03:09:41,841 INFO L321 TraceCheckSpWp]: Computing backward predicates...