/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/product-lines/elevator_spec13_product23.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 04:06:55,098 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 04:06:55,100 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 04:06:55,116 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 04:06:55,117 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 04:06:55,119 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 04:06:55,121 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 04:06:55,130 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 04:06:55,135 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 04:06:55,139 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 04:06:55,140 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 04:06:55,142 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 04:06:55,142 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 04:06:55,144 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 04:06:55,146 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 04:06:55,148 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 04:06:55,150 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 04:06:55,150 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 04:06:55,152 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 04:06:55,157 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 04:06:55,163 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 04:06:55,164 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 04:06:55,165 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 04:06:55,166 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 04:06:55,168 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-07 04:06:55,168 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-07 04:06:55,169 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-07 04:06:55,171 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-07 04:06:55,171 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-07 04:06:55,173 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-07 04:06:55,173 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-07 04:06:55,176 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-07 04:06:55,176 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-07 04:06:55,177 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-07 04:06:55,178 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-07 04:06:55,179 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-07 04:06:55,179 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-07 04:06:55,179 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-07 04:06:55,180 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 04:06:55,184 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 04:06:55,185 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 04:06:55,186 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-07 04:06:55,224 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 04:06:55,225 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 04:06:55,226 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 04:06:55,226 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 04:06:55,226 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 04:06:55,227 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 04:06:55,227 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 04:06:55,227 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 04:06:55,227 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 04:06:55,227 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 04:06:55,228 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 04:06:55,228 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 04:06:55,228 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 04:06:55,228 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 04:06:55,228 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 04:06:55,230 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 04:06:55,231 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 04:06:55,231 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 04:06:55,231 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 04:06:55,231 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 04:06:55,232 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 04:06:55,232 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 04:06:55,232 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 04:06:55,232 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 04:06:55,232 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 04:06:55,233 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 04:06:55,233 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 04:06:55,233 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 04:06:55,233 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-11-07 04:06:55,519 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 04:06:55,536 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 04:06:55,539 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 04:06:55,541 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 04:06:55,541 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 04:06:55,542 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec13_product23.cil.c [2019-11-07 04:06:55,623 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/65b466291/2df74b5c4f544426be4cfb8eef4d62db/FLAG98d98e5bb [2019-11-07 04:06:56,246 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 04:06:56,247 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec13_product23.cil.c [2019-11-07 04:06:56,279 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/65b466291/2df74b5c4f544426be4cfb8eef4d62db/FLAG98d98e5bb [2019-11-07 04:06:56,491 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/65b466291/2df74b5c4f544426be4cfb8eef4d62db [2019-11-07 04:06:56,510 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 04:06:56,525 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 04:06:56,528 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 04:06:56,528 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 04:06:56,532 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 04:06:56,533 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:06:56" (1/1) ... [2019-11-07 04:06:56,536 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@682403da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:06:56, skipping insertion in model container [2019-11-07 04:06:56,536 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:06:56" (1/1) ... [2019-11-07 04:06:56,544 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 04:06:56,639 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 04:06:57,395 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 04:06:57,421 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 04:06:57,556 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 04:06:57,640 INFO L192 MainTranslator]: Completed translation [2019-11-07 04:06:57,640 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:06:57 WrapperNode [2019-11-07 04:06:57,641 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 04:06:57,641 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 04:06:57,642 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 04:06:57,642 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 04:06:57,655 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:06:57" (1/1) ... [2019-11-07 04:06:57,655 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:06:57" (1/1) ... [2019-11-07 04:06:57,688 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:06:57" (1/1) ... [2019-11-07 04:06:57,689 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:06:57" (1/1) ... [2019-11-07 04:06:57,767 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:06:57" (1/1) ... [2019-11-07 04:06:57,788 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:06:57" (1/1) ... [2019-11-07 04:06:57,807 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:06:57" (1/1) ... [2019-11-07 04:06:57,836 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 04:06:57,837 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 04:06:57,837 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 04:06:57,838 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 04:06:57,839 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:06:57" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 04:06:57,917 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 04:06:57,918 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 04:06:57,918 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-11-07 04:06:57,918 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-11-07 04:06:57,918 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-11-07 04:06:57,920 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification13_spec__1 [2019-11-07 04:06:57,920 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification13_spec__2 [2019-11-07 04:06:57,921 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-11-07 04:06:57,921 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-11-07 04:06:57,922 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-11-07 04:06:57,922 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-11-07 04:06:57,923 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-11-07 04:06:57,923 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-11-07 04:06:57,924 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-11-07 04:06:57,924 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-11-07 04:06:57,924 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-11-07 04:06:57,927 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-11-07 04:06:57,928 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-11-07 04:06:57,928 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-11-07 04:06:57,928 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-11-07 04:06:57,930 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-11-07 04:06:57,930 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-11-07 04:06:57,930 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-11-07 04:06:57,931 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-11-07 04:06:57,931 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-11-07 04:06:57,931 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2019-11-07 04:06:57,932 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__twothirdsfull [2019-11-07 04:06:57,932 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-11-07 04:06:57,932 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-11-07 04:06:57,932 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-11-07 04:06:57,932 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__weight [2019-11-07 04:06:57,933 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2019-11-07 04:06:57,933 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-11-07 04:06:57,933 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-11-07 04:06:57,933 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-11-07 04:06:57,934 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-11-07 04:06:57,934 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-11-07 04:06:57,934 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-11-07 04:06:57,934 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2019-11-07 04:06:57,935 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloor [2019-11-07 04:06:57,935 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-11-07 04:06:57,935 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-11-07 04:06:57,935 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-11-07 04:06:57,936 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-11-07 04:06:57,936 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-11-07 04:06:57,936 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-11-07 04:06:57,936 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-11-07 04:06:57,937 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-11-07 04:06:57,937 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-11-07 04:06:57,937 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-11-07 04:06:57,937 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-11-07 04:06:57,938 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-11-07 04:06:57,938 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-11-07 04:06:57,938 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-11-07 04:06:57,938 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-11-07 04:06:57,939 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-11-07 04:06:57,939 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-11-07 04:06:57,939 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-11-07 04:06:57,939 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-11-07 04:06:57,940 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 04:06:57,941 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-11-07 04:06:57,941 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-11-07 04:06:57,941 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-11-07 04:06:57,941 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-11-07 04:06:57,941 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-11-07 04:06:57,941 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-11-07 04:06:57,942 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-11-07 04:06:57,942 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-11-07 04:06:57,942 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-11-07 04:06:57,942 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-11-07 04:06:57,942 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-11-07 04:06:57,943 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-11-07 04:06:57,943 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-11-07 04:06:57,944 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-11-07 04:06:57,944 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-11-07 04:06:57,944 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-11-07 04:06:57,945 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-11-07 04:06:57,945 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-11-07 04:06:57,945 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 04:06:57,946 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 04:06:57,946 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-11-07 04:06:57,947 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-11-07 04:06:57,947 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-11-07 04:06:57,947 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-11-07 04:06:57,947 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-11-07 04:06:57,948 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-11-07 04:06:57,949 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-11-07 04:06:57,949 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-11-07 04:06:57,949 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification13_spec__1 [2019-11-07 04:06:57,949 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-11-07 04:06:57,949 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification13_spec__2 [2019-11-07 04:06:57,950 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-11-07 04:06:57,950 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-11-07 04:06:57,950 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-11-07 04:06:57,950 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-11-07 04:06:57,950 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-11-07 04:06:57,950 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-11-07 04:06:57,951 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-11-07 04:06:57,951 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-11-07 04:06:57,951 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-11-07 04:06:57,951 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-11-07 04:06:57,951 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-11-07 04:06:57,952 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-11-07 04:06:57,952 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-11-07 04:06:57,952 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-11-07 04:06:57,952 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-11-07 04:06:57,952 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-11-07 04:06:57,952 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-11-07 04:06:57,953 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-11-07 04:06:57,953 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-11-07 04:06:57,953 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-11-07 04:06:57,953 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-11-07 04:06:57,954 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-11-07 04:06:57,954 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-11-07 04:06:57,954 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-11-07 04:06:57,954 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-11-07 04:06:57,955 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2019-11-07 04:06:57,955 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloor [2019-11-07 04:06:57,956 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-11-07 04:06:57,956 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-11-07 04:06:57,957 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-11-07 04:06:57,957 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-11-07 04:06:57,957 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-11-07 04:06:57,958 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-11-07 04:06:57,959 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2019-11-07 04:06:57,959 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__twothirdsfull [2019-11-07 04:06:57,959 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-11-07 04:06:57,960 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-11-07 04:06:57,960 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__weight [2019-11-07 04:06:57,960 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2019-11-07 04:06:57,960 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-11-07 04:06:57,961 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-11-07 04:06:57,961 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-11-07 04:06:57,962 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 04:06:57,966 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-07 04:06:57,967 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-11-07 04:06:57,967 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-11-07 04:06:57,967 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-11-07 04:06:57,968 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-11-07 04:06:57,969 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-11-07 04:06:57,969 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-11-07 04:06:57,970 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-11-07 04:06:57,970 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-11-07 04:06:57,971 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-11-07 04:06:57,978 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-11-07 04:06:57,978 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-11-07 04:06:57,978 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-11-07 04:06:57,978 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-11-07 04:06:57,978 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-11-07 04:06:57,980 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 04:06:57,981 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-11-07 04:06:57,981 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-07 04:06:57,981 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-07 04:06:57,981 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-11-07 04:06:57,981 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-07 04:06:57,982 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-07 04:06:57,982 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 04:06:57,982 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-07 04:06:57,982 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-11-07 04:06:57,982 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 04:06:57,983 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-11-07 04:06:57,983 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-11-07 04:06:57,983 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 04:06:57,983 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-11-07 04:06:57,983 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-11-07 04:06:57,984 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-11-07 04:06:57,984 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-11-07 04:06:57,984 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-11-07 04:06:57,984 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 04:06:57,984 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-07 04:06:57,984 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 04:07:02,765 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 04:07:02,766 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-11-07 04:07:02,767 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:07:02 BoogieIcfgContainer [2019-11-07 04:07:02,767 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 04:07:02,768 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 04:07:02,768 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 04:07:02,771 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 04:07:02,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 04:06:56" (1/3) ... [2019-11-07 04:07:02,772 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@107d0f0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:07:02, skipping insertion in model container [2019-11-07 04:07:02,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:06:57" (2/3) ... [2019-11-07 04:07:02,773 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@107d0f0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:07:02, skipping insertion in model container [2019-11-07 04:07:02,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:07:02" (3/3) ... [2019-11-07 04:07:02,774 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec13_product23.cil.c [2019-11-07 04:07:02,784 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 04:07:02,793 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 04:07:02,805 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 04:07:02,836 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 04:07:02,837 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 04:07:02,837 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 04:07:02,837 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 04:07:02,837 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 04:07:02,837 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 04:07:02,837 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 04:07:02,838 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 04:07:02,871 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states. [2019-11-07 04:07:02,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-11-07 04:07:02,896 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:07:02,898 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:07:02,900 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:07:02,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:07:02,906 INFO L82 PathProgramCache]: Analyzing trace with hash 302796206, now seen corresponding path program 1 times [2019-11-07 04:07:02,916 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:07:02,916 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89251987] [2019-11-07 04:07:02,917 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:07:03,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:07:03,701 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 04:07:03,702 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89251987] [2019-11-07 04:07:03,703 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736841669] [2019-11-07 04:07:03,703 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:07:04,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:07:04,380 INFO L256 TraceCheckSpWp]: Trace formula consists of 2942 conjuncts, 1 conjunts are in the unsatisfiable core [2019-11-07 04:07:04,397 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:07:04,432 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-07 04:07:04,432 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:07:04,578 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 04:07:04,579 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 04:07:04,579 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 2 [2019-11-07 04:07:04,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069272757] [2019-11-07 04:07:04,587 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-07 04:07:04,587 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:07:04,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-07 04:07:04,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-07 04:07:04,606 INFO L87 Difference]: Start difference. First operand 614 states. Second operand 2 states. [2019-11-07 04:07:04,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:07:04,734 INFO L93 Difference]: Finished difference Result 978 states and 1484 transitions. [2019-11-07 04:07:04,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-07 04:07:04,737 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 133 [2019-11-07 04:07:04,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:07:04,772 INFO L225 Difference]: With dead ends: 978 [2019-11-07 04:07:04,773 INFO L226 Difference]: Without dead ends: 497 [2019-11-07 04:07:04,785 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-07 04:07:04,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2019-11-07 04:07:04,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 497. [2019-11-07 04:07:04,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 497 states. [2019-11-07 04:07:04,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 738 transitions. [2019-11-07 04:07:04,895 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 738 transitions. Word has length 133 [2019-11-07 04:07:04,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:07:04,898 INFO L462 AbstractCegarLoop]: Abstraction has 497 states and 738 transitions. [2019-11-07 04:07:04,898 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-07 04:07:04,898 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 738 transitions. [2019-11-07 04:07:04,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-11-07 04:07:04,915 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:07:04,915 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:07:05,124 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:07:05,125 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:07:05,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:07:05,125 INFO L82 PathProgramCache]: Analyzing trace with hash 2109520046, now seen corresponding path program 1 times [2019-11-07 04:07:05,126 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:07:05,126 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373805525] [2019-11-07 04:07:05,126 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:07:05,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:07:05,495 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-11-07 04:07:05,496 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373805525] [2019-11-07 04:07:05,496 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:07:05,496 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-07 04:07:05,497 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821450366] [2019-11-07 04:07:05,498 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 04:07:05,498 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:07:05,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 04:07:05,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-07 04:07:05,499 INFO L87 Difference]: Start difference. First operand 497 states and 738 transitions. Second operand 5 states. [2019-11-07 04:07:06,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:07:06,387 INFO L93 Difference]: Finished difference Result 1417 states and 2145 transitions. [2019-11-07 04:07:06,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 04:07:06,388 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 133 [2019-11-07 04:07:06,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:07:06,399 INFO L225 Difference]: With dead ends: 1417 [2019-11-07 04:07:06,399 INFO L226 Difference]: Without dead ends: 957 [2019-11-07 04:07:06,403 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-07 04:07:06,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2019-11-07 04:07:06,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 949. [2019-11-07 04:07:06,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 949 states. [2019-11-07 04:07:06,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 949 states to 949 states and 1432 transitions. [2019-11-07 04:07:06,493 INFO L78 Accepts]: Start accepts. Automaton has 949 states and 1432 transitions. Word has length 133 [2019-11-07 04:07:06,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:07:06,494 INFO L462 AbstractCegarLoop]: Abstraction has 949 states and 1432 transitions. [2019-11-07 04:07:06,494 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 04:07:06,494 INFO L276 IsEmpty]: Start isEmpty. Operand 949 states and 1432 transitions. [2019-11-07 04:07:06,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-11-07 04:07:06,500 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:07:06,501 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:07:06,501 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:07:06,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:07:06,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1450524096, now seen corresponding path program 1 times [2019-11-07 04:07:06,501 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:07:06,502 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590709387] [2019-11-07 04:07:06,502 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:07:06,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:07:06,691 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-07 04:07:06,691 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590709387] [2019-11-07 04:07:06,691 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015431374] [2019-11-07 04:07:06,692 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:07:07,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:07:07,385 INFO L256 TraceCheckSpWp]: Trace formula consists of 2953 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-07 04:07:07,402 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:07:07,443 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 04:07:07,443 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:07:07,629 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-07 04:07:07,629 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 04:07:07,629 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 5 [2019-11-07 04:07:07,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643426982] [2019-11-07 04:07:07,630 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 04:07:07,631 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:07:07,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 04:07:07,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-07 04:07:07,632 INFO L87 Difference]: Start difference. First operand 949 states and 1432 transitions. Second operand 4 states. [2019-11-07 04:07:07,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:07:07,720 INFO L93 Difference]: Finished difference Result 1873 states and 2859 transitions. [2019-11-07 04:07:07,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 04:07:07,721 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 137 [2019-11-07 04:07:07,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:07:07,730 INFO L225 Difference]: With dead ends: 1873 [2019-11-07 04:07:07,730 INFO L226 Difference]: Without dead ends: 961 [2019-11-07 04:07:07,736 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-11-07 04:07:07,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 961 states. [2019-11-07 04:07:07,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 961 to 961. [2019-11-07 04:07:07,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 961 states. [2019-11-07 04:07:07,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 961 states to 961 states and 1444 transitions. [2019-11-07 04:07:07,795 INFO L78 Accepts]: Start accepts. Automaton has 961 states and 1444 transitions. Word has length 137 [2019-11-07 04:07:07,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:07:07,796 INFO L462 AbstractCegarLoop]: Abstraction has 961 states and 1444 transitions. [2019-11-07 04:07:07,796 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 04:07:07,796 INFO L276 IsEmpty]: Start isEmpty. Operand 961 states and 1444 transitions. [2019-11-07 04:07:07,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2019-11-07 04:07:07,800 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:07:07,801 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:07:08,008 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:07:08,009 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:07:08,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:07:08,009 INFO L82 PathProgramCache]: Analyzing trace with hash 295639127, now seen corresponding path program 1 times [2019-11-07 04:07:08,010 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:07:08,010 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683309071] [2019-11-07 04:07:08,010 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:07:08,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:07:08,284 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-07 04:07:08,285 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683309071] [2019-11-07 04:07:08,285 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317607250] [2019-11-07 04:07:08,286 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:07:08,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:07:08,850 INFO L256 TraceCheckSpWp]: Trace formula consists of 2958 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-07 04:07:08,856 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:07:08,895 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-07 04:07:08,895 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:07:09,116 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-07 04:07:09,116 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 04:07:09,116 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5] total 8 [2019-11-07 04:07:09,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396703932] [2019-11-07 04:07:09,119 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 04:07:09,119 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:07:09,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 04:07:09,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-07 04:07:09,121 INFO L87 Difference]: Start difference. First operand 961 states and 1444 transitions. Second operand 5 states. [2019-11-07 04:07:09,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:07:09,209 INFO L93 Difference]: Finished difference Result 1891 states and 2869 transitions. [2019-11-07 04:07:09,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 04:07:09,210 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 139 [2019-11-07 04:07:09,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:07:09,218 INFO L225 Difference]: With dead ends: 1891 [2019-11-07 04:07:09,218 INFO L226 Difference]: Without dead ends: 959 [2019-11-07 04:07:09,224 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 277 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-11-07 04:07:09,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2019-11-07 04:07:09,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 959. [2019-11-07 04:07:09,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 959 states. [2019-11-07 04:07:09,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 959 states to 959 states and 1436 transitions. [2019-11-07 04:07:09,273 INFO L78 Accepts]: Start accepts. Automaton has 959 states and 1436 transitions. Word has length 139 [2019-11-07 04:07:09,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:07:09,274 INFO L462 AbstractCegarLoop]: Abstraction has 959 states and 1436 transitions. [2019-11-07 04:07:09,274 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 04:07:09,274 INFO L276 IsEmpty]: Start isEmpty. Operand 959 states and 1436 transitions. [2019-11-07 04:07:09,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-11-07 04:07:09,278 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:07:09,279 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:07:09,494 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:07:09,495 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:07:09,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:07:09,495 INFO L82 PathProgramCache]: Analyzing trace with hash 2005309906, now seen corresponding path program 1 times [2019-11-07 04:07:09,495 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:07:09,496 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669704774] [2019-11-07 04:07:09,496 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:07:09,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:07:09,681 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 04:07:09,681 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669704774] [2019-11-07 04:07:09,681 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059859069] [2019-11-07 04:07:09,682 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:07:10,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:07:10,496 INFO L256 TraceCheckSpWp]: Trace formula consists of 2962 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 04:07:10,504 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:07:10,587 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 04:07:10,587 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:07:10,823 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-07 04:07:10,823 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 04:07:10,824 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 6] total 12 [2019-11-07 04:07:10,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149093121] [2019-11-07 04:07:10,825 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 04:07:10,825 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:07:10,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 04:07:10,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2019-11-07 04:07:10,827 INFO L87 Difference]: Start difference. First operand 959 states and 1436 transitions. Second operand 5 states. [2019-11-07 04:07:12,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:07:12,183 INFO L93 Difference]: Finished difference Result 2318 states and 3535 transitions. [2019-11-07 04:07:12,186 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 04:07:12,187 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 140 [2019-11-07 04:07:12,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:07:12,198 INFO L225 Difference]: With dead ends: 2318 [2019-11-07 04:07:12,198 INFO L226 Difference]: Without dead ends: 1396 [2019-11-07 04:07:12,205 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 272 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2019-11-07 04:07:12,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1396 states. [2019-11-07 04:07:12,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1396 to 1376. [2019-11-07 04:07:12,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1376 states. [2019-11-07 04:07:12,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1376 states to 1376 states and 2035 transitions. [2019-11-07 04:07:12,271 INFO L78 Accepts]: Start accepts. Automaton has 1376 states and 2035 transitions. Word has length 140 [2019-11-07 04:07:12,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:07:12,272 INFO L462 AbstractCegarLoop]: Abstraction has 1376 states and 2035 transitions. [2019-11-07 04:07:12,272 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 04:07:12,272 INFO L276 IsEmpty]: Start isEmpty. Operand 1376 states and 2035 transitions. [2019-11-07 04:07:12,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-11-07 04:07:12,276 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:07:12,276 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:07:12,484 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:07:12,484 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:07:12,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:07:12,484 INFO L82 PathProgramCache]: Analyzing trace with hash 25610835, now seen corresponding path program 1 times [2019-11-07 04:07:12,485 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:07:12,485 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214997058] [2019-11-07 04:07:12,485 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:07:12,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:07:12,689 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-07 04:07:12,690 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214997058] [2019-11-07 04:07:12,690 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368008615] [2019-11-07 04:07:12,690 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:07:13,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:07:13,485 INFO L256 TraceCheckSpWp]: Trace formula consists of 2963 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-07 04:07:13,502 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:07:13,672 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 04:07:13,673 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:07:14,009 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-07 04:07:14,010 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 04:07:14,010 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 15 [2019-11-07 04:07:14,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594661275] [2019-11-07 04:07:14,011 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 04:07:14,012 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:07:14,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 04:07:14,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2019-11-07 04:07:14,012 INFO L87 Difference]: Start difference. First operand 1376 states and 2035 transitions. Second operand 7 states. [2019-11-07 04:07:15,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:07:15,556 INFO L93 Difference]: Finished difference Result 2980 states and 4418 transitions. [2019-11-07 04:07:15,557 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-07 04:07:15,557 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 141 [2019-11-07 04:07:15,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:07:15,574 INFO L225 Difference]: With dead ends: 2980 [2019-11-07 04:07:15,574 INFO L226 Difference]: Without dead ends: 1641 [2019-11-07 04:07:15,582 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 271 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2019-11-07 04:07:15,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1641 states. [2019-11-07 04:07:15,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1641 to 1622. [2019-11-07 04:07:15,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1622 states. [2019-11-07 04:07:15,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1622 states to 1622 states and 2381 transitions. [2019-11-07 04:07:15,672 INFO L78 Accepts]: Start accepts. Automaton has 1622 states and 2381 transitions. Word has length 141 [2019-11-07 04:07:15,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:07:15,673 INFO L462 AbstractCegarLoop]: Abstraction has 1622 states and 2381 transitions. [2019-11-07 04:07:15,673 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 04:07:15,673 INFO L276 IsEmpty]: Start isEmpty. Operand 1622 states and 2381 transitions. [2019-11-07 04:07:15,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-11-07 04:07:15,676 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:07:15,676 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:07:15,883 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:07:15,883 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:07:15,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:07:15,884 INFO L82 PathProgramCache]: Analyzing trace with hash -526233702, now seen corresponding path program 1 times [2019-11-07 04:07:15,884 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:07:15,884 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943083192] [2019-11-07 04:07:15,884 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:07:15,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:07:16,138 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-07 04:07:16,139 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943083192] [2019-11-07 04:07:16,140 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968505240] [2019-11-07 04:07:16,140 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:07:16,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:07:16,846 INFO L256 TraceCheckSpWp]: Trace formula consists of 2965 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-07 04:07:16,852 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:07:16,892 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-07 04:07:16,893 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:07:17,048 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-07 04:07:17,049 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 04:07:17,049 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5] total 8 [2019-11-07 04:07:17,049 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279966751] [2019-11-07 04:07:17,050 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 04:07:17,050 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:07:17,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 04:07:17,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-11-07 04:07:17,051 INFO L87 Difference]: Start difference. First operand 1622 states and 2381 transitions. Second operand 5 states. [2019-11-07 04:07:17,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:07:17,133 INFO L93 Difference]: Finished difference Result 3226 states and 4793 transitions. [2019-11-07 04:07:17,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 04:07:17,133 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 141 [2019-11-07 04:07:17,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:07:17,148 INFO L225 Difference]: With dead ends: 3226 [2019-11-07 04:07:17,148 INFO L226 Difference]: Without dead ends: 1654 [2019-11-07 04:07:17,159 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 277 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-11-07 04:07:17,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1654 states. [2019-11-07 04:07:17,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1654 to 1634. [2019-11-07 04:07:17,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1634 states. [2019-11-07 04:07:17,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1634 states to 1634 states and 2393 transitions. [2019-11-07 04:07:17,229 INFO L78 Accepts]: Start accepts. Automaton has 1634 states and 2393 transitions. Word has length 141 [2019-11-07 04:07:17,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:07:17,230 INFO L462 AbstractCegarLoop]: Abstraction has 1634 states and 2393 transitions. [2019-11-07 04:07:17,230 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 04:07:17,230 INFO L276 IsEmpty]: Start isEmpty. Operand 1634 states and 2393 transitions. [2019-11-07 04:07:17,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2019-11-07 04:07:17,234 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:07:17,234 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:07:17,442 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:07:17,443 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:07:17,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:07:17,443 INFO L82 PathProgramCache]: Analyzing trace with hash 517519867, now seen corresponding path program 1 times [2019-11-07 04:07:17,443 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:07:17,444 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943323575] [2019-11-07 04:07:17,444 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:07:17,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:07:17,619 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-07 04:07:17,620 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943323575] [2019-11-07 04:07:17,620 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571476222] [2019-11-07 04:07:17,620 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:07:18,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:07:18,316 INFO L256 TraceCheckSpWp]: Trace formula consists of 2969 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 04:07:18,322 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:07:18,357 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-07 04:07:18,358 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:07:18,512 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-07 04:07:18,517 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 04:07:18,518 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-11-07 04:07:18,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107176138] [2019-11-07 04:07:18,520 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 04:07:18,520 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:07:18,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 04:07:18,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-11-07 04:07:18,520 INFO L87 Difference]: Start difference. First operand 1634 states and 2393 transitions. Second operand 4 states. [2019-11-07 04:07:18,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:07:18,937 INFO L93 Difference]: Finished difference Result 3292 states and 4909 transitions. [2019-11-07 04:07:18,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 04:07:18,937 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 143 [2019-11-07 04:07:18,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:07:18,953 INFO L225 Difference]: With dead ends: 3292 [2019-11-07 04:07:18,953 INFO L226 Difference]: Without dead ends: 1709 [2019-11-07 04:07:18,965 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 287 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-11-07 04:07:18,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1709 states. [2019-11-07 04:07:19,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1709 to 1691. [2019-11-07 04:07:19,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1691 states. [2019-11-07 04:07:19,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1691 states to 1691 states and 2486 transitions. [2019-11-07 04:07:19,049 INFO L78 Accepts]: Start accepts. Automaton has 1691 states and 2486 transitions. Word has length 143 [2019-11-07 04:07:19,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:07:19,050 INFO L462 AbstractCegarLoop]: Abstraction has 1691 states and 2486 transitions. [2019-11-07 04:07:19,050 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 04:07:19,050 INFO L276 IsEmpty]: Start isEmpty. Operand 1691 states and 2486 transitions. [2019-11-07 04:07:19,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-11-07 04:07:19,054 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:07:19,054 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:07:19,262 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:07:19,263 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:07:19,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:07:19,263 INFO L82 PathProgramCache]: Analyzing trace with hash -204798223, now seen corresponding path program 1 times [2019-11-07 04:07:19,264 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:07:19,264 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111672709] [2019-11-07 04:07:19,264 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:07:19,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:07:19,409 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-07 04:07:19,410 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111672709] [2019-11-07 04:07:19,410 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202118799] [2019-11-07 04:07:19,410 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:07:20,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:07:20,022 INFO L256 TraceCheckSpWp]: Trace formula consists of 2971 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 04:07:20,036 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:07:20,080 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 04:07:20,080 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:07:20,329 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-07 04:07:20,329 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 04:07:20,330 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 6] total 10 [2019-11-07 04:07:20,333 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498561374] [2019-11-07 04:07:20,335 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 04:07:20,335 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:07:20,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 04:07:20,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-11-07 04:07:20,335 INFO L87 Difference]: Start difference. First operand 1691 states and 2486 transitions. Second operand 5 states. [2019-11-07 04:07:21,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:07:21,594 INFO L93 Difference]: Finished difference Result 3951 states and 6024 transitions. [2019-11-07 04:07:21,595 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 04:07:21,595 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 145 [2019-11-07 04:07:21,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:07:21,614 INFO L225 Difference]: With dead ends: 3951 [2019-11-07 04:07:21,615 INFO L226 Difference]: Without dead ends: 2770 [2019-11-07 04:07:21,622 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 287 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-11-07 04:07:21,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2770 states. [2019-11-07 04:07:21,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2770 to 2705. [2019-11-07 04:07:21,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2705 states. [2019-11-07 04:07:21,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2705 states to 2705 states and 4076 transitions. [2019-11-07 04:07:21,781 INFO L78 Accepts]: Start accepts. Automaton has 2705 states and 4076 transitions. Word has length 145 [2019-11-07 04:07:21,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:07:21,784 INFO L462 AbstractCegarLoop]: Abstraction has 2705 states and 4076 transitions. [2019-11-07 04:07:21,784 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 04:07:21,784 INFO L276 IsEmpty]: Start isEmpty. Operand 2705 states and 4076 transitions. [2019-11-07 04:07:21,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-11-07 04:07:21,793 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:07:21,795 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:07:22,014 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:07:22,014 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:07:22,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:07:22,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1824863963, now seen corresponding path program 1 times [2019-11-07 04:07:22,015 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:07:22,016 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620579170] [2019-11-07 04:07:22,016 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:07:22,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:07:22,174 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-07 04:07:22,174 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620579170] [2019-11-07 04:07:22,175 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996011883] [2019-11-07 04:07:22,175 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:07:22,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:07:22,790 INFO L256 TraceCheckSpWp]: Trace formula consists of 2970 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 04:07:22,800 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:07:22,968 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-07 04:07:22,968 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:07:23,126 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-07 04:07:23,126 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 04:07:23,127 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 6 [2019-11-07 04:07:23,127 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34441063] [2019-11-07 04:07:23,132 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 04:07:23,133 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:07:23,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 04:07:23,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-07 04:07:23,133 INFO L87 Difference]: Start difference. First operand 2705 states and 4076 transitions. Second operand 4 states. [2019-11-07 04:07:23,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:07:23,261 INFO L93 Difference]: Finished difference Result 5348 states and 8234 transitions. [2019-11-07 04:07:23,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 04:07:23,262 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 145 [2019-11-07 04:07:23,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:07:23,287 INFO L225 Difference]: With dead ends: 5348 [2019-11-07 04:07:23,287 INFO L226 Difference]: Without dead ends: 2694 [2019-11-07 04:07:23,303 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 289 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-07 04:07:23,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2694 states. [2019-11-07 04:07:23,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2694 to 2607. [2019-11-07 04:07:23,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2607 states. [2019-11-07 04:07:23,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2607 states to 2607 states and 3894 transitions. [2019-11-07 04:07:23,445 INFO L78 Accepts]: Start accepts. Automaton has 2607 states and 3894 transitions. Word has length 145 [2019-11-07 04:07:23,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:07:23,445 INFO L462 AbstractCegarLoop]: Abstraction has 2607 states and 3894 transitions. [2019-11-07 04:07:23,445 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 04:07:23,446 INFO L276 IsEmpty]: Start isEmpty. Operand 2607 states and 3894 transitions. [2019-11-07 04:07:23,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2019-11-07 04:07:23,449 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:07:23,449 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:07:23,657 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:07:23,657 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:07:23,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:07:23,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1523029652, now seen corresponding path program 1 times [2019-11-07 04:07:23,658 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:07:23,658 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727096956] [2019-11-07 04:07:23,658 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:07:23,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:07:23,809 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-11-07 04:07:23,810 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727096956] [2019-11-07 04:07:23,810 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177099588] [2019-11-07 04:07:23,810 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:07:24,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:07:24,443 INFO L256 TraceCheckSpWp]: Trace formula consists of 2971 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 04:07:24,447 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:07:24,501 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-07 04:07:24,501 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:07:24,622 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-07 04:07:24,623 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 04:07:24,623 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5] total 7 [2019-11-07 04:07:24,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204989388] [2019-11-07 04:07:24,624 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 04:07:24,624 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:07:24,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 04:07:24,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-11-07 04:07:24,625 INFO L87 Difference]: Start difference. First operand 2607 states and 3894 transitions. Second operand 4 states. [2019-11-07 04:07:24,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:07:24,749 INFO L93 Difference]: Finished difference Result 5263 states and 8075 transitions. [2019-11-07 04:07:24,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 04:07:24,750 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 148 [2019-11-07 04:07:24,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:07:24,767 INFO L225 Difference]: With dead ends: 5263 [2019-11-07 04:07:24,767 INFO L226 Difference]: Without dead ends: 2707 [2019-11-07 04:07:24,781 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 292 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-11-07 04:07:24,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2707 states. [2019-11-07 04:07:24,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2707 to 2654. [2019-11-07 04:07:24,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2654 states. [2019-11-07 04:07:24,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2654 states to 2654 states and 3965 transitions. [2019-11-07 04:07:24,915 INFO L78 Accepts]: Start accepts. Automaton has 2654 states and 3965 transitions. Word has length 148 [2019-11-07 04:07:24,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:07:24,916 INFO L462 AbstractCegarLoop]: Abstraction has 2654 states and 3965 transitions. [2019-11-07 04:07:24,916 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 04:07:24,916 INFO L276 IsEmpty]: Start isEmpty. Operand 2654 states and 3965 transitions. [2019-11-07 04:07:24,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-11-07 04:07:24,926 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:07:24,926 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:07:25,137 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:07:25,138 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:07:25,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:07:25,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1981356709, now seen corresponding path program 1 times [2019-11-07 04:07:25,138 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:07:25,139 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254473162] [2019-11-07 04:07:25,139 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:07:25,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:07:25,392 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-07 04:07:25,393 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254473162] [2019-11-07 04:07:25,393 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367018215] [2019-11-07 04:07:25,393 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:07:26,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:07:26,113 INFO L256 TraceCheckSpWp]: Trace formula consists of 2983 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 04:07:26,118 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:07:26,164 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 04:07:26,164 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:07:26,344 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-07 04:07:26,344 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 04:07:26,345 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 6] total 11 [2019-11-07 04:07:26,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880312873] [2019-11-07 04:07:26,345 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 04:07:26,345 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:07:26,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 04:07:26,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-11-07 04:07:26,346 INFO L87 Difference]: Start difference. First operand 2654 states and 3965 transitions. Second operand 5 states. [2019-11-07 04:07:27,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:07:27,578 INFO L93 Difference]: Finished difference Result 5918 states and 9154 transitions. [2019-11-07 04:07:27,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 04:07:27,579 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 154 [2019-11-07 04:07:27,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:07:27,604 INFO L225 Difference]: With dead ends: 5918 [2019-11-07 04:07:27,604 INFO L226 Difference]: Without dead ends: 3824 [2019-11-07 04:07:27,617 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 305 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2019-11-07 04:07:27,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3824 states. [2019-11-07 04:07:27,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3824 to 3774. [2019-11-07 04:07:27,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3774 states. [2019-11-07 04:07:27,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3774 states to 3774 states and 5774 transitions. [2019-11-07 04:07:27,812 INFO L78 Accepts]: Start accepts. Automaton has 3774 states and 5774 transitions. Word has length 154 [2019-11-07 04:07:27,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:07:27,812 INFO L462 AbstractCegarLoop]: Abstraction has 3774 states and 5774 transitions. [2019-11-07 04:07:27,812 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 04:07:27,812 INFO L276 IsEmpty]: Start isEmpty. Operand 3774 states and 5774 transitions. [2019-11-07 04:07:27,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2019-11-07 04:07:27,817 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:07:27,817 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:07:28,025 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:07:28,025 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:07:28,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:07:28,026 INFO L82 PathProgramCache]: Analyzing trace with hash 718068239, now seen corresponding path program 1 times [2019-11-07 04:07:28,026 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:07:28,026 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108623512] [2019-11-07 04:07:28,026 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:07:28,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:07:28,239 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-07 04:07:28,240 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108623512] [2019-11-07 04:07:28,240 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567204850] [2019-11-07 04:07:28,240 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true