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_product17.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 03:09:07,872 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 03:09:07,878 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 03:09:07,895 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 03:09:07,896 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 03:09:07,898 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 03:09:07,900 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 03:09:07,909 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 03:09:07,913 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 03:09:07,914 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 03:09:07,915 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 03:09:07,917 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 03:09:07,918 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 03:09:07,921 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 03:09:07,923 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 03:09:07,925 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 03:09:07,927 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 03:09:07,930 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 03:09:07,931 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 03:09:07,935 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 03:09:07,939 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 03:09:07,942 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 03:09:07,945 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 03:09:07,945 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 03:09:07,949 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 03:09:07,949 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 03:09:07,949 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 03:09:07,951 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 03:09:07,953 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 03:09:07,954 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 03:09:07,954 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 03:09:07,955 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 03:09:07,956 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 03:09:07,957 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 03:09:07,958 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 03:09:07,959 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 03:09:07,959 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 03:09:07,960 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 03:09:07,960 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 03:09:07,961 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 03:09:07,962 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 03:09:07,963 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 03:09:07,998 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 03:09:07,998 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 03:09:08,002 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 03:09:08,002 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 03:09:08,002 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 03:09:08,003 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 03:09:08,003 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 03:09:08,003 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 03:09:08,006 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 03:09:08,007 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 03:09:08,007 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 03:09:08,007 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 03:09:08,007 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 03:09:08,007 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 03:09:08,007 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 03:09:08,008 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 03:09:08,008 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 03:09:08,008 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 03:09:08,008 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 03:09:08,008 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 03:09:08,009 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 03:09:08,009 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 03:09:08,010 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 03:09:08,011 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 03:09:08,011 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 03:09:08,011 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 03:09:08,012 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 03:09:08,012 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 03:09:08,012 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 03:09:08,362 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 03:09:08,388 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 03:09:08,392 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 03:09:08,394 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 03:09:08,395 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 03:09:08,396 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec3_product17.cil.c [2019-10-15 03:09:08,487 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0bddbcadd/7019d505698347078597c5b2e2db6a64/FLAGd457d57e0 [2019-10-15 03:09:09,261 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 03:09:09,262 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec3_product17.cil.c [2019-10-15 03:09:09,292 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0bddbcadd/7019d505698347078597c5b2e2db6a64/FLAGd457d57e0 [2019-10-15 03:09:09,358 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0bddbcadd/7019d505698347078597c5b2e2db6a64 [2019-10-15 03:09:09,368 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 03:09:09,370 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 03:09:09,378 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 03:09:09,378 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 03:09:09,382 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 03:09:09,383 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:09:09" (1/1) ... [2019-10-15 03:09:09,386 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6af97dc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:09:09, skipping insertion in model container [2019-10-15 03:09:09,386 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:09:09" (1/1) ... [2019-10-15 03:09:09,393 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 03:09:09,490 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 03:09:10,208 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:09:10,232 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 03:09:10,384 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:09:10,451 INFO L192 MainTranslator]: Completed translation [2019-10-15 03:09:10,452 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:09:10 WrapperNode [2019-10-15 03:09:10,452 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 03:09:10,453 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 03:09:10,453 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 03:09:10,453 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 03:09:10,468 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:09:10" (1/1) ... [2019-10-15 03:09:10,468 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:09:10" (1/1) ... [2019-10-15 03:09:10,501 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:09:10" (1/1) ... [2019-10-15 03:09:10,501 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:09:10" (1/1) ... [2019-10-15 03:09:10,577 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:09:10" (1/1) ... [2019-10-15 03:09:10,623 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:09:10" (1/1) ... [2019-10-15 03:09:10,632 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:09:10" (1/1) ... [2019-10-15 03:09:10,649 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 03:09:10,650 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 03:09:10,650 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 03:09:10,650 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 03:09:10,652 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:09:10" (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 03:09:10,749 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 03:09:10,749 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 03:09:10,749 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-15 03:09:10,750 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-15 03:09:10,750 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification3_spec__1 [2019-10-15 03:09:10,751 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification3_spec__2 [2019-10-15 03:09:10,752 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-15 03:09:10,752 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-10-15 03:09:10,752 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-10-15 03:09:10,753 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-10-15 03:09:10,753 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-10-15 03:09:10,754 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-10-15 03:09:10,755 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-10-15 03:09:10,755 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-10-15 03:09:10,756 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-10-15 03:09:10,756 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-10-15 03:09:10,759 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-10-15 03:09:10,759 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-15 03:09:10,760 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-15 03:09:10,760 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-15 03:09:10,760 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-15 03:09:10,761 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-15 03:09:10,761 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-15 03:09:10,762 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-10-15 03:09:10,762 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-10-15 03:09:10,762 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-10-15 03:09:10,762 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-10-15 03:09:10,762 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-10-15 03:09:10,763 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-10-15 03:09:10,763 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-10-15 03:09:10,763 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-10-15 03:09:10,764 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-10-15 03:09:10,764 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-10-15 03:09:10,764 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-10-15 03:09:10,764 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-10-15 03:09:10,764 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-10-15 03:09:10,765 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-10-15 03:09:10,765 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-10-15 03:09:10,765 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-10-15 03:09:10,765 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-10-15 03:09:10,765 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-10-15 03:09:10,766 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-10-15 03:09:10,766 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-10-15 03:09:10,766 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-10-15 03:09:10,766 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-10-15 03:09:10,767 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-15 03:09:10,767 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-10-15 03:09:10,767 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-10-15 03:09:10,767 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-10-15 03:09:10,768 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-10-15 03:09:10,768 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-10-15 03:09:10,768 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-10-15 03:09:10,768 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-10-15 03:09:10,768 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-10-15 03:09:10,768 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-10-15 03:09:10,769 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-10-15 03:09:10,769 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-15 03:09:10,769 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-10-15 03:09:10,769 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-10-15 03:09:10,770 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-10-15 03:09:10,770 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-15 03:09:10,771 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-10-15 03:09:10,771 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-15 03:09:10,771 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-15 03:09:10,771 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 03:09:10,772 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-10-15 03:09:10,772 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-10-15 03:09:10,772 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-10-15 03:09:10,772 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-15 03:09:10,773 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-15 03:09:10,773 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-15 03:09:10,773 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-15 03:09:10,773 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 03:09:10,774 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 03:09:10,775 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-10-15 03:09:10,775 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-10-15 03:09:10,776 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-10-15 03:09:10,776 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-15 03:09:10,776 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-15 03:09:10,777 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-15 03:09:10,777 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-10-15 03:09:10,778 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-10-15 03:09:10,778 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-10-15 03:09:10,778 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification3_spec__1 [2019-10-15 03:09:10,778 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification3_spec__2 [2019-10-15 03:09:10,779 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-10-15 03:09:10,779 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-10-15 03:09:10,780 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-15 03:09:10,780 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-10-15 03:09:10,780 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-10-15 03:09:10,780 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-10-15 03:09:10,780 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-10-15 03:09:10,781 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-10-15 03:09:10,781 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-10-15 03:09:10,781 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-10-15 03:09:10,781 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-10-15 03:09:10,781 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-10-15 03:09:10,782 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-10-15 03:09:10,782 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-10-15 03:09:10,782 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-10-15 03:09:10,782 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-15 03:09:10,782 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-15 03:09:10,783 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-15 03:09:10,783 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-15 03:09:10,783 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-15 03:09:10,783 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-15 03:09:10,783 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 03:09:10,784 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-15 03:09:10,784 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-15 03:09:10,784 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 03:09:10,784 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-15 03:09:10,784 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-15 03:09:10,785 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 03:09:10,785 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-15 03:09:10,785 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-15 03:09:10,785 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 03:09:10,786 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-15 03:09:10,786 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-15 03:09:10,787 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-10-15 03:09:10,787 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-10-15 03:09:10,787 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-10-15 03:09:10,788 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-10-15 03:09:10,788 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-10-15 03:09:10,788 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-10-15 03:09:10,790 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-10-15 03:09:10,790 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-10-15 03:09:10,790 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-10-15 03:09:10,791 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-10-15 03:09:10,791 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-10-15 03:09:10,791 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-10-15 03:09:10,791 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-10-15 03:09:10,792 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-10-15 03:09:10,792 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-10-15 03:09:10,793 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-10-15 03:09:10,796 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-10-15 03:09:10,796 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-10-15 03:09:10,797 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-10-15 03:09:10,797 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 03:09:10,798 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-10-15 03:09:10,798 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-10-15 03:09:10,798 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-10-15 03:09:10,798 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-10-15 03:09:10,799 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-10-15 03:09:10,800 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-10-15 03:09:10,807 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-10-15 03:09:10,807 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-10-15 03:09:10,808 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-10-15 03:09:10,808 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-15 03:09:10,809 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-10-15 03:09:10,810 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-15 03:09:10,810 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-15 03:09:10,810 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-15 03:09:10,810 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-15 03:09:10,811 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-15 03:09:10,811 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 03:09:10,811 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-15 03:09:10,811 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 03:09:10,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-15 03:09:10,811 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 03:09:17,751 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 03:09:17,751 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-15 03:09:17,753 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:09:17 BoogieIcfgContainer [2019-10-15 03:09:17,753 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 03:09:17,755 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 03:09:17,755 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 03:09:17,758 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 03:09:17,759 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 03:09:09" (1/3) ... [2019-10-15 03:09:17,760 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b82d9b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:09:17, skipping insertion in model container [2019-10-15 03:09:17,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:09:10" (2/3) ... [2019-10-15 03:09:17,760 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b82d9b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:09:17, skipping insertion in model container [2019-10-15 03:09:17,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:09:17" (3/3) ... [2019-10-15 03:09:17,762 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product17.cil.c [2019-10-15 03:09:17,773 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 03:09:17,786 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 03:09:17,798 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 03:09:17,834 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 03:09:17,835 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 03:09:17,835 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 03:09:17,835 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 03:09:17,835 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 03:09:17,835 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 03:09:17,835 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 03:09:17,835 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 03:09:17,896 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states. [2019-10-15 03:09:17,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-10-15 03:09:17,914 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:09:17,915 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 03:09:17,918 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:09:17,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:09:17,923 INFO L82 PathProgramCache]: Analyzing trace with hash -656663885, now seen corresponding path program 1 times [2019-10-15 03:09:17,932 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:09:17,933 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850244183] [2019-10-15 03:09:17,933 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:09:17,933 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:09:17,933 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:09:18,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:09:18,753 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 03:09:18,754 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850244183] [2019-10-15 03:09:18,755 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126013494] [2019-10-15 03:09:18,755 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 03:09:19,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:09:19,482 INFO L256 TraceCheckSpWp]: Trace formula consists of 2943 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-15 03:09:19,517 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:09:19,773 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 03:09:19,773 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:09:20,244 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 03:09:20,245 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 03:09:20,245 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [11] total 12 [2019-10-15 03:09:20,245 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013194845] [2019-10-15 03:09:20,256 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:09:20,256 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:09:20,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:09:20,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-10-15 03:09:20,276 INFO L87 Difference]: Start difference. First operand 566 states. Second operand 3 states. [2019-10-15 03:09:20,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:09:20,623 INFO L93 Difference]: Finished difference Result 1218 states and 1883 transitions. [2019-10-15 03:09:20,624 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:09:20,626 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 98 [2019-10-15 03:09:20,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:09:20,658 INFO L225 Difference]: With dead ends: 1218 [2019-10-15 03:09:20,658 INFO L226 Difference]: Without dead ends: 784 [2019-10-15 03:09:20,670 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 198 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-10-15 03:09:20,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2019-10-15 03:09:20,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 771. [2019-10-15 03:09:20,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 771 states. [2019-10-15 03:09:20,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 1177 transitions. [2019-10-15 03:09:20,858 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 1177 transitions. Word has length 98 [2019-10-15 03:09:20,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:09:20,859 INFO L462 AbstractCegarLoop]: Abstraction has 771 states and 1177 transitions. [2019-10-15 03:09:20,859 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:09:20,859 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 1177 transitions. [2019-10-15 03:09:20,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-10-15 03:09:20,881 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:09:20,882 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 03:09:21,085 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:09:21,085 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:09:21,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:09:21,086 INFO L82 PathProgramCache]: Analyzing trace with hash -768869353, now seen corresponding path program 1 times [2019-10-15 03:09:21,087 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:09:21,087 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930724828] [2019-10-15 03:09:21,087 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:09:21,087 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:09:21,088 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:09:21,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:09:21,709 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 03:09:21,710 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930724828] [2019-10-15 03:09:21,710 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:09:21,710 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-15 03:09:21,710 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848784577] [2019-10-15 03:09:21,711 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-15 03:09:21,711 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:09:21,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-15 03:09:21,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-10-15 03:09:21,712 INFO L87 Difference]: Start difference. First operand 771 states and 1177 transitions. Second operand 8 states. [2019-10-15 03:09:21,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:09:21,886 INFO L93 Difference]: Finished difference Result 1525 states and 2357 transitions. [2019-10-15 03:09:21,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 03:09:21,888 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 99 [2019-10-15 03:09:21,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:09:21,906 INFO L225 Difference]: With dead ends: 1525 [2019-10-15 03:09:21,907 INFO L226 Difference]: Without dead ends: 785 [2019-10-15 03:09:21,912 INFO L600 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 [2019-10-15 03:09:21,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2019-10-15 03:09:21,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 779. [2019-10-15 03:09:21,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 779 states. [2019-10-15 03:09:21,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 779 states to 779 states and 1185 transitions. [2019-10-15 03:09:21,981 INFO L78 Accepts]: Start accepts. Automaton has 779 states and 1185 transitions. Word has length 99 [2019-10-15 03:09:21,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:09:21,982 INFO L462 AbstractCegarLoop]: Abstraction has 779 states and 1185 transitions. [2019-10-15 03:09:21,982 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-15 03:09:21,982 INFO L276 IsEmpty]: Start isEmpty. Operand 779 states and 1185 transitions. [2019-10-15 03:09:21,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-10-15 03:09:21,986 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:09:21,987 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 03:09:21,987 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:09:21,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:09:21,987 INFO L82 PathProgramCache]: Analyzing trace with hash -2139774390, now seen corresponding path program 1 times [2019-10-15 03:09:21,988 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:09:21,988 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128326671] [2019-10-15 03:09:21,988 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:09:21,988 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:09:21,988 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:09:22,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:09:22,283 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 03:09:22,284 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128326671] [2019-10-15 03:09:22,284 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516638201] [2019-10-15 03:09:22,285 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:09:22,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:09:23,013 INFO L256 TraceCheckSpWp]: Trace formula consists of 2965 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 03:09:23,023 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:09:23,107 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 03:09:23,108 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:09:23,335 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 03:09:23,336 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 03:09:23,336 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [7] total 10 [2019-10-15 03:09:23,336 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28683789] [2019-10-15 03:09:23,337 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 03:09:23,337 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:09:23,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 03:09:23,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-10-15 03:09:23,338 INFO L87 Difference]: Start difference. First operand 779 states and 1185 transitions. Second operand 5 states. [2019-10-15 03:09:25,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:09:25,974 INFO L93 Difference]: Finished difference Result 2934 states and 4527 transitions. [2019-10-15 03:09:25,975 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 03:09:25,975 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 103 [2019-10-15 03:09:25,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:09:26,000 INFO L225 Difference]: With dead ends: 2934 [2019-10-15 03:09:26,001 INFO L226 Difference]: Without dead ends: 2186 [2019-10-15 03:09:26,010 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 03:09:26,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2186 states. [2019-10-15 03:09:26,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2186 to 2136. [2019-10-15 03:09:26,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2136 states. [2019-10-15 03:09:26,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2136 states to 2136 states and 3208 transitions. [2019-10-15 03:09:26,142 INFO L78 Accepts]: Start accepts. Automaton has 2136 states and 3208 transitions. Word has length 103 [2019-10-15 03:09:26,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:09:26,143 INFO L462 AbstractCegarLoop]: Abstraction has 2136 states and 3208 transitions. [2019-10-15 03:09:26,143 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 03:09:26,143 INFO L276 IsEmpty]: Start isEmpty. Operand 2136 states and 3208 transitions. [2019-10-15 03:09:26,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-10-15 03:09:26,147 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:09:26,147 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 03:09:26,356 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:09:26,356 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:09:26,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:09:26,357 INFO L82 PathProgramCache]: Analyzing trace with hash 2040806792, now seen corresponding path program 1 times [2019-10-15 03:09:26,358 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:09:26,358 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310783628] [2019-10-15 03:09:26,358 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:09:26,359 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:09:26,359 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:09:26,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:09:26,604 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 03:09:26,604 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310783628] [2019-10-15 03:09:26,605 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591144499] [2019-10-15 03:09:26,605 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 03:09:27,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:09:27,366 INFO L256 TraceCheckSpWp]: Trace formula consists of 2981 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-15 03:09:27,378 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:09:27,470 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 03:09:27,471 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:09:27,537 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:09:27,783 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 03:09:27,784 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 03:09:27,784 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [7] total 12 [2019-10-15 03:09:27,784 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453944075] [2019-10-15 03:09:27,785 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-15 03:09:27,785 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:09:27,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-15 03:09:27,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2019-10-15 03:09:27,786 INFO L87 Difference]: Start difference. First operand 2136 states and 3208 transitions. Second operand 7 states. [2019-10-15 03:09:29,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:09:29,537 INFO L93 Difference]: Finished difference Result 3955 states and 5977 transitions. [2019-10-15 03:09:29,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 03:09:29,538 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 107 [2019-10-15 03:09:29,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:09:29,560 INFO L225 Difference]: With dead ends: 3955 [2019-10-15 03:09:29,561 INFO L226 Difference]: Without dead ends: 2378 [2019-10-15 03:09:29,574 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 03:09:29,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2378 states. [2019-10-15 03:09:29,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2378 to 2280. [2019-10-15 03:09:29,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2280 states. [2019-10-15 03:09:29,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2280 states to 2280 states and 3408 transitions. [2019-10-15 03:09:29,739 INFO L78 Accepts]: Start accepts. Automaton has 2280 states and 3408 transitions. Word has length 107 [2019-10-15 03:09:29,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:09:29,740 INFO L462 AbstractCegarLoop]: Abstraction has 2280 states and 3408 transitions. [2019-10-15 03:09:29,740 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-15 03:09:29,740 INFO L276 IsEmpty]: Start isEmpty. Operand 2280 states and 3408 transitions. [2019-10-15 03:09:29,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-10-15 03:09:29,745 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:09:29,745 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 03:09:29,954 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:09:29,955 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:09:29,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:09:29,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1849756224, now seen corresponding path program 1 times [2019-10-15 03:09:29,955 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:09:29,956 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809890400] [2019-10-15 03:09:29,956 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:09:29,956 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:09:29,956 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:09:30,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:09:30,277 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 03:09:30,278 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809890400] [2019-10-15 03:09:30,278 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657840650] [2019-10-15 03:09:30,278 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 03:09:30,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:09:30,881 INFO L256 TraceCheckSpWp]: Trace formula consists of 2970 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 03:09:30,887 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:09:30,944 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 03:09:30,945 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:09:31,224 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 03:09:31,225 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 03:09:31,225 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [7] total 10 [2019-10-15 03:09:31,225 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890389676] [2019-10-15 03:09:31,226 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 03:09:31,226 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:09:31,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 03:09:31,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-10-15 03:09:31,227 INFO L87 Difference]: Start difference. First operand 2280 states and 3408 transitions. Second operand 5 states. [2019-10-15 03:09:31,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:09:31,576 INFO L93 Difference]: Finished difference Result 4297 states and 6532 transitions. [2019-10-15 03:09:31,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 03:09:31,577 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 108 [2019-10-15 03:09:31,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:09:31,600 INFO L225 Difference]: With dead ends: 4297 [2019-10-15 03:09:31,601 INFO L226 Difference]: Without dead ends: 2280 [2019-10-15 03:09:31,616 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 03:09:31,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2280 states. [2019-10-15 03:09:31,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2280 to 2280. [2019-10-15 03:09:31,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2280 states. [2019-10-15 03:09:31,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2280 states to 2280 states and 3366 transitions. [2019-10-15 03:09:31,773 INFO L78 Accepts]: Start accepts. Automaton has 2280 states and 3366 transitions. Word has length 108 [2019-10-15 03:09:31,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:09:31,774 INFO L462 AbstractCegarLoop]: Abstraction has 2280 states and 3366 transitions. [2019-10-15 03:09:31,774 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 03:09:31,774 INFO L276 IsEmpty]: Start isEmpty. Operand 2280 states and 3366 transitions. [2019-10-15 03:09:31,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-10-15 03:09:31,778 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:09:31,779 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 03:09:31,980 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:09:31,980 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:09:31,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:09:31,981 INFO L82 PathProgramCache]: Analyzing trace with hash -465779275, now seen corresponding path program 1 times [2019-10-15 03:09:31,981 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:09:31,981 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294186113] [2019-10-15 03:09:31,982 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:09:31,982 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:09:31,983 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:09:32,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:09:32,294 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 03:09:32,294 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294186113] [2019-10-15 03:09:32,295 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594000567] [2019-10-15 03:09:32,295 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 03:09:32,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:09:32,930 INFO L256 TraceCheckSpWp]: Trace formula consists of 2980 conjuncts, 20 conjunts are in the unsatisfiable core [2019-10-15 03:09:32,937 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:09:33,099 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2019-10-15 03:09:33,141 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 03:09:33,141 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:09:33,289 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2019-10-15 03:09:33,643 WARN L191 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 13 [2019-10-15 03:09:33,909 WARN L191 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2019-10-15 03:09:34,088 WARN L191 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2019-10-15 03:09:34,388 WARN L191 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 13 [2019-10-15 03:09:34,425 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:09:34,431 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:09:34,432 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:09:34,435 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:09:34,435 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:09:34,499 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 03:09:34,499 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 03:09:34,500 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7] total 13 [2019-10-15 03:09:34,500 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238038951] [2019-10-15 03:09:34,501 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 03:09:34,501 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:09:34,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 03:09:34,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2019-10-15 03:09:34,503 INFO L87 Difference]: Start difference. First operand 2280 states and 3366 transitions. Second operand 6 states. [2019-10-15 03:09:36,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:09:36,440 INFO L93 Difference]: Finished difference Result 6665 states and 10057 transitions. [2019-10-15 03:09:36,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-15 03:09:36,441 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 110 [2019-10-15 03:09:36,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:09:36,486 INFO L225 Difference]: With dead ends: 6665 [2019-10-15 03:09:36,486 INFO L226 Difference]: Without dead ends: 4416 [2019-10-15 03:09:36,507 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 216 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2019-10-15 03:09:36,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4416 states. [2019-10-15 03:09:36,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4416 to 4260. [2019-10-15 03:09:36,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4260 states. [2019-10-15 03:09:36,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4260 states to 4260 states and 6375 transitions. [2019-10-15 03:09:36,776 INFO L78 Accepts]: Start accepts. Automaton has 4260 states and 6375 transitions. Word has length 110 [2019-10-15 03:09:36,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:09:36,776 INFO L462 AbstractCegarLoop]: Abstraction has 4260 states and 6375 transitions. [2019-10-15 03:09:36,776 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 03:09:36,777 INFO L276 IsEmpty]: Start isEmpty. Operand 4260 states and 6375 transitions. [2019-10-15 03:09:36,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-10-15 03:09:36,781 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:09:36,781 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 03:09:36,990 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:09:36,990 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:09:36,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:09:36,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1388389254, now seen corresponding path program 1 times [2019-10-15 03:09:36,992 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:09:36,993 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765347355] [2019-10-15 03:09:36,993 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:09:36,993 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:09:36,993 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:09:37,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:09:37,247 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 03:09:37,248 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765347355] [2019-10-15 03:09:37,248 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802832201] [2019-10-15 03:09:37,248 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 03:09:37,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:09:37,928 INFO L256 TraceCheckSpWp]: Trace formula consists of 2970 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-15 03:09:37,933 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:09:37,960 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 03:09:37,961 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:09:38,105 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 03:09:38,106 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 03:09:38,106 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [11] total 12 [2019-10-15 03:09:38,106 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306382702] [2019-10-15 03:09:38,107 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:09:38,107 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:09:38,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:09:38,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-10-15 03:09:38,108 INFO L87 Difference]: Start difference. First operand 4260 states and 6375 transitions. Second operand 3 states. [2019-10-15 03:09:38,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:09:38,459 INFO L93 Difference]: Finished difference Result 10524 states and 16049 transitions. [2019-10-15 03:09:38,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:09:38,460 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 110 [2019-10-15 03:09:38,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:09:38,529 INFO L225 Difference]: With dead ends: 10524 [2019-10-15 03:09:38,529 INFO L226 Difference]: Without dead ends: 6295 [2019-10-15 03:09:38,560 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 222 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-10-15 03:09:38,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6295 states. [2019-10-15 03:09:38,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6295 to 6129. [2019-10-15 03:09:38,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6129 states. [2019-10-15 03:09:38,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6129 states to 6129 states and 9177 transitions. [2019-10-15 03:09:38,979 INFO L78 Accepts]: Start accepts. Automaton has 6129 states and 9177 transitions. Word has length 110 [2019-10-15 03:09:38,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:09:38,980 INFO L462 AbstractCegarLoop]: Abstraction has 6129 states and 9177 transitions. [2019-10-15 03:09:38,980 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:09:38,980 INFO L276 IsEmpty]: Start isEmpty. Operand 6129 states and 9177 transitions. [2019-10-15 03:09:38,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-10-15 03:09:38,984 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:09:38,985 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] [2019-10-15 03:09:39,196 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:09:39,196 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:09:39,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:09:39,196 INFO L82 PathProgramCache]: Analyzing trace with hash -2040787126, now seen corresponding path program 1 times [2019-10-15 03:09:39,197 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:09:39,197 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750530287] [2019-10-15 03:09:39,197 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:09:39,197 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:09:39,197 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:09:39,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:09:39,471 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 03:09:39,472 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750530287] [2019-10-15 03:09:39,472 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854608214] [2019-10-15 03:09:39,472 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 03:09:40,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:09:40,190 INFO L256 TraceCheckSpWp]: Trace formula consists of 2982 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-15 03:09:40,208 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:09:40,616 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 03:09:40,616 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:09:41,045 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:09:41,271 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 03:09:41,271 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 03:09:41,271 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6, 7] imperfect sequences [11] total 20 [2019-10-15 03:09:41,272 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000434500] [2019-10-15 03:09:41,273 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-15 03:09:41,274 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:09:41,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-15 03:09:41,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2019-10-15 03:09:41,274 INFO L87 Difference]: Start difference. First operand 6129 states and 9177 transitions. Second operand 11 states.