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_spec2_product26.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-36ac518-m [2019-10-07 14:18:58,355 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-07 14:18:58,358 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-07 14:18:58,370 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-07 14:18:58,370 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-07 14:18:58,371 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-07 14:18:58,373 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-07 14:18:58,375 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-07 14:18:58,376 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-07 14:18:58,377 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-07 14:18:58,378 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-07 14:18:58,379 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-07 14:18:58,380 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-07 14:18:58,381 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-07 14:18:58,382 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-07 14:18:58,383 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-07 14:18:58,384 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-07 14:18:58,385 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-07 14:18:58,387 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-07 14:18:58,389 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-07 14:18:58,390 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-07 14:18:58,392 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-07 14:18:58,393 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-07 14:18:58,394 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-07 14:18:58,396 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-07 14:18:58,396 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-07 14:18:58,397 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-07 14:18:58,397 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-07 14:18:58,398 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-07 14:18:58,399 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-07 14:18:58,399 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-07 14:18:58,400 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-07 14:18:58,401 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-07 14:18:58,401 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-07 14:18:58,402 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-07 14:18:58,402 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-07 14:18:58,403 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-07 14:18:58,403 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-07 14:18:58,404 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-07 14:18:58,404 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-07 14:18:58,405 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-07 14:18:58,406 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-07 14:18:58,420 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-07 14:18:58,420 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-07 14:18:58,422 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-07 14:18:58,422 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-07 14:18:58,422 INFO L138 SettingsManager]: * Use SBE=true [2019-10-07 14:18:58,422 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-07 14:18:58,423 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-07 14:18:58,423 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-07 14:18:58,423 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-07 14:18:58,423 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-07 14:18:58,424 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-07 14:18:58,424 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-07 14:18:58,424 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-07 14:18:58,424 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-07 14:18:58,424 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-07 14:18:58,424 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-07 14:18:58,425 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-07 14:18:58,425 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-07 14:18:58,425 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-07 14:18:58,425 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-07 14:18:58,426 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-07 14:18:58,426 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-07 14:18:58,426 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-07 14:18:58,426 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-07 14:18:58,426 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-07 14:18:58,427 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-07 14:18:58,427 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-07 14:18:58,427 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-07 14:18:58,427 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-07 14:18:58,760 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-07 14:18:58,780 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-07 14:18:58,783 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-07 14:18:58,785 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-07 14:18:58,786 INFO L275 PluginConnector]: CDTParser initialized [2019-10-07 14:18:58,786 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec2_product26.cil.c [2019-10-07 14:18:58,863 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b8edd7968/131874eece4a4ccaaf11a92d0ee64ed5/FLAG5244f24b4 [2019-10-07 14:18:59,514 INFO L306 CDTParser]: Found 1 translation units. [2019-10-07 14:18:59,515 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec2_product26.cil.c [2019-10-07 14:18:59,537 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b8edd7968/131874eece4a4ccaaf11a92d0ee64ed5/FLAG5244f24b4 [2019-10-07 14:18:59,681 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b8edd7968/131874eece4a4ccaaf11a92d0ee64ed5 [2019-10-07 14:18:59,691 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-07 14:18:59,693 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-07 14:18:59,694 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-07 14:18:59,694 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-07 14:18:59,697 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-07 14:18:59,698 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 02:18:59" (1/1) ... [2019-10-07 14:18:59,701 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51fe3b84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:18:59, skipping insertion in model container [2019-10-07 14:18:59,701 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 02:18:59" (1/1) ... [2019-10-07 14:18:59,709 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-07 14:18:59,789 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-07 14:19:00,602 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 14:19:00,617 INFO L188 MainTranslator]: Completed pre-run [2019-10-07 14:19:00,725 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 14:19:00,808 INFO L192 MainTranslator]: Completed translation [2019-10-07 14:19:00,809 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:19:00 WrapperNode [2019-10-07 14:19:00,809 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-07 14:19:00,810 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-07 14:19:00,810 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-07 14:19:00,810 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-07 14:19:00,826 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:19:00" (1/1) ... [2019-10-07 14:19:00,826 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:19:00" (1/1) ... [2019-10-07 14:19:00,884 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:19:00" (1/1) ... [2019-10-07 14:19:00,885 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:19:00" (1/1) ... [2019-10-07 14:19:00,971 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:19:00" (1/1) ... [2019-10-07 14:19:00,990 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:19:00" (1/1) ... [2019-10-07 14:19:01,000 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:19:00" (1/1) ... [2019-10-07 14:19:01,017 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-07 14:19:01,018 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-07 14:19:01,019 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-07 14:19:01,019 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-07 14:19:01,020 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:19:00" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-07 14:19:01,087 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-07 14:19:01,088 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-07 14:19:01,088 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-07 14:19:01,088 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-10-07 14:19:01,088 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-10-07 14:19:01,089 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-10-07 14:19:01,089 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-10-07 14:19:01,089 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-10-07 14:19:01,089 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-10-07 14:19:01,090 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-10-07 14:19:01,090 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-10-07 14:19:01,090 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-07 14:19:01,090 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-10-07 14:19:01,090 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-10-07 14:19:01,091 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-10-07 14:19:01,091 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-07 14:19:01,091 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-10-07 14:19:01,091 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-07 14:19:01,092 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-07 14:19:01,092 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-07 14:19:01,092 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-10-07 14:19:01,092 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-10-07 14:19:01,093 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-10-07 14:19:01,093 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-10-07 14:19:01,093 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-10-07 14:19:01,093 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-10-07 14:19:01,094 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__weight [2019-10-07 14:19:01,094 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-10-07 14:19:01,094 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-10-07 14:19:01,094 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-10-07 14:19:01,094 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-10-07 14:19:01,094 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-10-07 14:19:01,095 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-10-07 14:19:01,095 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-10-07 14:19:01,095 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-10-07 14:19:01,095 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-10-07 14:19:01,096 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-10-07 14:19:01,096 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-10-07 14:19:01,096 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-10-07 14:19:01,096 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-10-07 14:19:01,096 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-10-07 14:19:01,097 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-10-07 14:19:01,097 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-10-07 14:19:01,097 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__empty [2019-10-07 14:19:01,097 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-07 14:19:01,097 INFO L138 BoogieDeclarations]: Found implementation of procedure printState__wrappee__empty [2019-10-07 14:19:01,097 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-10-07 14:19:01,098 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-10-07 14:19:01,098 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-10-07 14:19:01,098 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-10-07 14:19:01,098 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-10-07 14:19:01,098 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-07 14:19:01,099 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-07 14:19:01,099 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-07 14:19:01,099 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-07 14:19:01,099 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-07 14:19:01,099 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-07 14:19:01,099 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-07 14:19:01,100 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-07 14:19:01,100 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-07 14:19:01,100 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-07 14:19:01,100 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-07 14:19:01,100 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-10-07 14:19:01,101 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-10-07 14:19:01,101 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-10-07 14:19:01,101 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-10-07 14:19:01,101 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-10-07 14:19:01,101 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-10-07 14:19:01,101 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-10-07 14:19:01,102 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-10-07 14:19:01,102 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__1 [2019-10-07 14:19:01,102 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__2 [2019-10-07 14:19:01,102 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__3 [2019-10-07 14:19:01,102 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__4 [2019-10-07 14:19:01,103 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-07 14:19:01,103 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-10-07 14:19:01,103 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-10-07 14:19:01,103 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-07 14:19:01,103 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-07 14:19:01,104 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-07 14:19:01,104 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-10-07 14:19:01,104 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-10-07 14:19:01,104 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-10-07 14:19:01,104 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-10-07 14:19:01,105 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-10-07 14:19:01,105 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-10-07 14:19:01,105 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-10-07 14:19:01,105 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-10-07 14:19:01,105 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-10-07 14:19:01,106 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-07 14:19:01,106 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-10-07 14:19:01,106 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-10-07 14:19:01,106 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-10-07 14:19:01,106 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-07 14:19:01,106 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-10-07 14:19:01,107 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-10-07 14:19:01,107 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-10-07 14:19:01,107 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-10-07 14:19:01,107 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-10-07 14:19:01,107 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-07 14:19:01,107 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-10-07 14:19:01,108 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-07 14:19:01,108 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__1 [2019-10-07 14:19:01,108 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__4 [2019-10-07 14:19:01,108 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-07 14:19:01,108 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-07 14:19:01,108 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-07 14:19:01,109 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-07 14:19:01,109 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-07 14:19:01,109 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-07 14:19:01,109 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-07 14:19:01,109 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-10-07 14:19:01,109 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-10-07 14:19:01,110 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-10-07 14:19:01,110 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-10-07 14:19:01,110 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-10-07 14:19:01,110 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-10-07 14:19:01,110 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-10-07 14:19:01,111 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-10-07 14:19:01,111 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-10-07 14:19:01,111 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-10-07 14:19:01,111 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-10-07 14:19:01,111 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-10-07 14:19:01,111 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-10-07 14:19:01,112 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-10-07 14:19:01,112 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-10-07 14:19:01,112 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-10-07 14:19:01,112 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-10-07 14:19:01,112 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__weight [2019-10-07 14:19:01,113 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-10-07 14:19:01,113 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__2 [2019-10-07 14:19:01,113 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-10-07 14:19:01,113 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-10-07 14:19:01,113 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-10-07 14:19:01,114 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-10-07 14:19:01,114 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-10-07 14:19:01,114 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-10-07 14:19:01,114 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-10-07 14:19:01,114 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-10-07 14:19:01,115 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-10-07 14:19:01,115 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__empty [2019-10-07 14:19:01,115 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__3 [2019-10-07 14:19:01,115 INFO L130 BoogieDeclarations]: Found specification of procedure printState__wrappee__empty [2019-10-07 14:19:01,115 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-07 14:19:01,115 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-10-07 14:19:01,116 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-07 14:19:01,116 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-07 14:19:01,116 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-07 14:19:01,117 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-07 14:19:01,117 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-07 14:19:01,117 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-07 14:19:01,117 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-07 14:19:01,118 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-07 14:19:01,118 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-07 14:19:01,118 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-07 14:19:01,118 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-07 14:19:01,118 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-07 14:19:01,118 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-07 14:19:01,118 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-07 14:19:01,118 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-07 14:19:01,119 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-07 14:19:01,119 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-07 14:19:01,119 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-10-07 14:19:01,119 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-07 14:19:01,119 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-10-07 14:19:01,119 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-10-07 14:19:01,120 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-07 14:19:01,120 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-07 14:19:01,120 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-07 14:19:05,887 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-07 14:19:05,887 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-07 14:19:05,889 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 02:19:05 BoogieIcfgContainer [2019-10-07 14:19:05,889 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-07 14:19:05,890 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-07 14:19:05,890 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-07 14:19:05,893 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-07 14:19:05,893 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.10 02:18:59" (1/3) ... [2019-10-07 14:19:05,894 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f4a2dda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 02:19:05, skipping insertion in model container [2019-10-07 14:19:05,894 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:19:00" (2/3) ... [2019-10-07 14:19:05,895 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f4a2dda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 02:19:05, skipping insertion in model container [2019-10-07 14:19:05,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 02:19:05" (3/3) ... [2019-10-07 14:19:05,897 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product26.cil.c [2019-10-07 14:19:05,904 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-07 14:19:05,912 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-07 14:19:05,922 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-07 14:19:05,953 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-07 14:19:05,954 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-07 14:19:05,954 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-07 14:19:05,954 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-07 14:19:05,954 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-07 14:19:05,954 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-07 14:19:05,954 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-07 14:19:05,955 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-07 14:19:05,986 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states. [2019-10-07 14:19:06,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-10-07 14:19:06,002 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:19:06,003 INFO L385 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:19:06,005 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:19:06,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:19:06,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1452112933, now seen corresponding path program 1 times [2019-10-07 14:19:06,021 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:19:06,021 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:19:06,021 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:19:06,022 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:19:06,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:19:06,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:19:06,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 14:19:06,597 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:19:06,598 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 14:19:06,600 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-07 14:19:06,609 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-07 14:19:06,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-07 14:19:06,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-07 14:19:06,627 INFO L87 Difference]: Start difference. First operand 564 states. Second operand 2 states. [2019-10-07 14:19:06,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:19:06,722 INFO L93 Difference]: Finished difference Result 461 states and 688 transitions. [2019-10-07 14:19:06,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-07 14:19:06,723 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 74 [2019-10-07 14:19:06,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:19:06,762 INFO L225 Difference]: With dead ends: 461 [2019-10-07 14:19:06,762 INFO L226 Difference]: Without dead ends: 427 [2019-10-07 14:19:06,766 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-07 14:19:06,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2019-10-07 14:19:06,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 427. [2019-10-07 14:19:06,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 427 states. [2019-10-07 14:19:06,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 637 transitions. [2019-10-07 14:19:06,869 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 637 transitions. Word has length 74 [2019-10-07 14:19:06,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:19:06,872 INFO L462 AbstractCegarLoop]: Abstraction has 427 states and 637 transitions. [2019-10-07 14:19:06,872 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-07 14:19:06,872 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 637 transitions. [2019-10-07 14:19:06,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-10-07 14:19:06,878 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:19:06,879 INFO L385 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:19:06,879 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:19:06,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:19:06,880 INFO L82 PathProgramCache]: Analyzing trace with hash -176499596, now seen corresponding path program 1 times [2019-10-07 14:19:06,880 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:19:06,880 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:19:06,880 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:19:06,880 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:19:06,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:19:06,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:19:07,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 14:19:07,236 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:19:07,237 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 14:19:07,237 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-07 14:19:07,241 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-07 14:19:07,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-07 14:19:07,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-07 14:19:07,242 INFO L87 Difference]: Start difference. First operand 427 states and 637 transitions. Second operand 6 states. [2019-10-07 14:19:10,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:19:10,466 INFO L93 Difference]: Finished difference Result 1301 states and 2013 transitions. [2019-10-07 14:19:10,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-07 14:19:10,467 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 75 [2019-10-07 14:19:10,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:19:10,478 INFO L225 Difference]: With dead ends: 1301 [2019-10-07 14:19:10,478 INFO L226 Difference]: Without dead ends: 916 [2019-10-07 14:19:10,484 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-10-07 14:19:10,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 916 states. [2019-10-07 14:19:10,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 916 to 821. [2019-10-07 14:19:10,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 821 states. [2019-10-07 14:19:10,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 1274 transitions. [2019-10-07 14:19:10,569 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 1274 transitions. Word has length 75 [2019-10-07 14:19:10,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:19:10,571 INFO L462 AbstractCegarLoop]: Abstraction has 821 states and 1274 transitions. [2019-10-07 14:19:10,571 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-07 14:19:10,571 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 1274 transitions. [2019-10-07 14:19:10,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-10-07 14:19:10,588 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:19:10,588 INFO L385 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:19:10,589 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:19:10,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:19:10,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1050688871, now seen corresponding path program 1 times [2019-10-07 14:19:10,589 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:19:10,590 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:19:10,590 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:19:10,590 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:19:10,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:19:10,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:19:10,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 14:19:10,990 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:19:10,990 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 14:19:10,990 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2019-10-07 14:19:10,992 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-07 14:19:10,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-07 14:19:10,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-10-07 14:19:10,993 INFO L87 Difference]: Start difference. First operand 821 states and 1274 transitions. Second operand 12 states. [2019-10-07 14:19:18,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:19:18,322 INFO L93 Difference]: Finished difference Result 2446 states and 3831 transitions. [2019-10-07 14:19:18,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-10-07 14:19:18,322 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 102 [2019-10-07 14:19:18,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:19:18,334 INFO L225 Difference]: With dead ends: 2446 [2019-10-07 14:19:18,334 INFO L226 Difference]: Without dead ends: 1667 [2019-10-07 14:19:18,339 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=156, Invalid=836, Unknown=0, NotChecked=0, Total=992 [2019-10-07 14:19:18,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1667 states. [2019-10-07 14:19:18,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1667 to 1608. [2019-10-07 14:19:18,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1608 states. [2019-10-07 14:19:18,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1608 states to 1608 states and 2504 transitions. [2019-10-07 14:19:18,441 INFO L78 Accepts]: Start accepts. Automaton has 1608 states and 2504 transitions. Word has length 102 [2019-10-07 14:19:18,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:19:18,441 INFO L462 AbstractCegarLoop]: Abstraction has 1608 states and 2504 transitions. [2019-10-07 14:19:18,442 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-07 14:19:18,442 INFO L276 IsEmpty]: Start isEmpty. Operand 1608 states and 2504 transitions. [2019-10-07 14:19:18,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-10-07 14:19:18,446 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:19:18,446 INFO L385 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:19:18,446 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:19:18,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:19:18,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1040642516, now seen corresponding path program 1 times [2019-10-07 14:19:18,447 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:19:18,447 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:19:18,447 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:19:18,447 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:19:18,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:19:18,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:19:18,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 14:19:18,623 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:19:18,623 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 14:19:18,623 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-07 14:19:18,624 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-07 14:19:18,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-07 14:19:18,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-10-07 14:19:18,625 INFO L87 Difference]: Start difference. First operand 1608 states and 2504 transitions. Second operand 8 states. [2019-10-07 14:19:18,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:19:18,737 INFO L93 Difference]: Finished difference Result 3454 states and 5464 transitions. [2019-10-07 14:19:18,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-07 14:19:18,738 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 103 [2019-10-07 14:19:18,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:19:18,752 INFO L225 Difference]: With dead ends: 3454 [2019-10-07 14:19:18,752 INFO L226 Difference]: Without dead ends: 1890 [2019-10-07 14:19:18,760 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-10-07 14:19:18,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1890 states. [2019-10-07 14:19:18,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1890 to 1632. [2019-10-07 14:19:18,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1632 states. [2019-10-07 14:19:18,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1632 states to 1632 states and 2528 transitions. [2019-10-07 14:19:18,861 INFO L78 Accepts]: Start accepts. Automaton has 1632 states and 2528 transitions. Word has length 103 [2019-10-07 14:19:18,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:19:18,861 INFO L462 AbstractCegarLoop]: Abstraction has 1632 states and 2528 transitions. [2019-10-07 14:19:18,862 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-07 14:19:18,862 INFO L276 IsEmpty]: Start isEmpty. Operand 1632 states and 2528 transitions. [2019-10-07 14:19:18,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-10-07 14:19:18,865 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:19:18,866 INFO L385 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:19:18,866 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:19:18,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:19:18,866 INFO L82 PathProgramCache]: Analyzing trace with hash -443802238, now seen corresponding path program 1 times [2019-10-07 14:19:18,867 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:19:18,867 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:19:18,867 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:19:18,867 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:19:18,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:19:18,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:19:19,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 14:19:19,076 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:19:19,076 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 14:19:19,076 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-07 14:19:19,077 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-07 14:19:19,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-07 14:19:19,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-07 14:19:19,077 INFO L87 Difference]: Start difference. First operand 1632 states and 2528 transitions. Second operand 7 states. [2019-10-07 14:19:22,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:19:22,606 INFO L93 Difference]: Finished difference Result 4473 states and 7017 transitions. [2019-10-07 14:19:22,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-07 14:19:22,607 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 107 [2019-10-07 14:19:22,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:19:22,631 INFO L225 Difference]: With dead ends: 4473 [2019-10-07 14:19:22,632 INFO L226 Difference]: Without dead ends: 2885 [2019-10-07 14:19:22,645 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2019-10-07 14:19:22,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2885 states. [2019-10-07 14:19:22,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2885 to 2820. [2019-10-07 14:19:22,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2820 states. [2019-10-07 14:19:22,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2820 states to 2820 states and 4445 transitions. [2019-10-07 14:19:22,875 INFO L78 Accepts]: Start accepts. Automaton has 2820 states and 4445 transitions. Word has length 107 [2019-10-07 14:19:22,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:19:22,878 INFO L462 AbstractCegarLoop]: Abstraction has 2820 states and 4445 transitions. [2019-10-07 14:19:22,878 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-07 14:19:22,878 INFO L276 IsEmpty]: Start isEmpty. Operand 2820 states and 4445 transitions. [2019-10-07 14:19:22,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-10-07 14:19:22,886 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:19:22,886 INFO L385 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:19:22,886 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:19:22,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:19:22,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1169992528, now seen corresponding path program 1 times [2019-10-07 14:19:22,887 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:19:22,887 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:19:22,887 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:19:22,887 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:19:22,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:19:22,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:19:23,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 14:19:23,083 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:19:23,084 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 14:19:23,084 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-07 14:19:23,084 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-07 14:19:23,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-07 14:19:23,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-07 14:19:23,085 INFO L87 Difference]: Start difference. First operand 2820 states and 4445 transitions. Second operand 5 states. [2019-10-07 14:19:23,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:19:23,213 INFO L93 Difference]: Finished difference Result 4910 states and 7772 transitions. [2019-10-07 14:19:23,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-07 14:19:23,214 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 111 [2019-10-07 14:19:23,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:19:23,233 INFO L225 Difference]: With dead ends: 4910 [2019-10-07 14:19:23,233 INFO L226 Difference]: Without dead ends: 2884 [2019-10-07 14:19:23,244 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-07 14:19:23,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2884 states. [2019-10-07 14:19:23,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2884 to 2860. [2019-10-07 14:19:23,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2860 states. [2019-10-07 14:19:23,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2860 states to 2860 states and 4495 transitions. [2019-10-07 14:19:23,395 INFO L78 Accepts]: Start accepts. Automaton has 2860 states and 4495 transitions. Word has length 111 [2019-10-07 14:19:23,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:19:23,396 INFO L462 AbstractCegarLoop]: Abstraction has 2860 states and 4495 transitions. [2019-10-07 14:19:23,396 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-07 14:19:23,396 INFO L276 IsEmpty]: Start isEmpty. Operand 2860 states and 4495 transitions. [2019-10-07 14:19:23,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-10-07 14:19:23,400 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:19:23,400 INFO L385 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:19:23,400 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:19:23,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:19:23,401 INFO L82 PathProgramCache]: Analyzing trace with hash 996206408, now seen corresponding path program 1 times [2019-10-07 14:19:23,401 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:19:23,401 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:19:23,401 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:19:23,401 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:19:23,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:19:23,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:19:23,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 14:19:23,622 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:19:23,623 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 14:19:23,623 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-07 14:19:23,624 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-07 14:19:23,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-07 14:19:23,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-07 14:19:23,625 INFO L87 Difference]: Start difference. First operand 2860 states and 4495 transitions. Second operand 7 states. [2019-10-07 14:19:27,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:19:27,450 INFO L93 Difference]: Finished difference Result 6804 states and 10714 transitions. [2019-10-07 14:19:27,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-07 14:19:27,450 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 115 [2019-10-07 14:19:27,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:19:27,478 INFO L225 Difference]: With dead ends: 6804 [2019-10-07 14:19:27,478 INFO L226 Difference]: Without dead ends: 4546 [2019-10-07 14:19:27,489 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-10-07 14:19:27,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4546 states. [2019-10-07 14:19:27,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4546 to 4482. [2019-10-07 14:19:27,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4482 states. [2019-10-07 14:19:27,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4482 states to 4482 states and 6891 transitions. [2019-10-07 14:19:27,740 INFO L78 Accepts]: Start accepts. Automaton has 4482 states and 6891 transitions. Word has length 115 [2019-10-07 14:19:27,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:19:27,741 INFO L462 AbstractCegarLoop]: Abstraction has 4482 states and 6891 transitions. [2019-10-07 14:19:27,741 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-07 14:19:27,741 INFO L276 IsEmpty]: Start isEmpty. Operand 4482 states and 6891 transitions. [2019-10-07 14:19:27,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-10-07 14:19:27,744 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:19:27,745 INFO L385 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:19:27,745 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:19:27,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:19:27,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1825621464, now seen corresponding path program 1 times [2019-10-07 14:19:27,746 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:19:27,746 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:19:27,746 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:19:27,746 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:19:27,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:19:27,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:19:27,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 14:19:27,956 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:19:27,956 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 14:19:27,956 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-07 14:19:27,957 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-07 14:19:27,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-07 14:19:27,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-07 14:19:27,958 INFO L87 Difference]: Start difference. First operand 4482 states and 6891 transitions. Second operand 7 states. [2019-10-07 14:19:28,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:19:28,259 INFO L93 Difference]: Finished difference Result 8902 states and 13999 transitions. [2019-10-07 14:19:28,259 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-07 14:19:28,259 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 118 [2019-10-07 14:19:28,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:19:28,288 INFO L225 Difference]: With dead ends: 8902 [2019-10-07 14:19:28,288 INFO L226 Difference]: Without dead ends: 4482 [2019-10-07 14:19:28,311 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-07 14:19:28,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4482 states. [2019-10-07 14:19:28,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4482 to 4482. [2019-10-07 14:19:28,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4482 states. [2019-10-07 14:19:28,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4482 states to 4482 states and 6771 transitions. [2019-10-07 14:19:28,737 INFO L78 Accepts]: Start accepts. Automaton has 4482 states and 6771 transitions. Word has length 118 [2019-10-07 14:19:28,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:19:28,738 INFO L462 AbstractCegarLoop]: Abstraction has 4482 states and 6771 transitions. [2019-10-07 14:19:28,738 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-07 14:19:28,738 INFO L276 IsEmpty]: Start isEmpty. Operand 4482 states and 6771 transitions. [2019-10-07 14:19:28,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-10-07 14:19:28,742 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:19:28,743 INFO L385 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:19:28,743 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:19:28,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:19:28,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1374084091, now seen corresponding path program 1 times [2019-10-07 14:19:28,744 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:19:28,744 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:19:28,744 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:19:28,744 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:19:28,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:19:28,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:19:28,978 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-07 14:19:28,978 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:19:28,979 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 14:19:28,979 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-07 14:19:28,981 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-07 14:19:28,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-07 14:19:28,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-07 14:19:28,982 INFO L87 Difference]: Start difference. First operand 4482 states and 6771 transitions. Second operand 7 states. [2019-10-07 14:19:33,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:19:33,244 INFO L93 Difference]: Finished difference Result 8459 states and 12797 transitions. [2019-10-07 14:19:33,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-07 14:19:33,245 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 120 [2019-10-07 14:19:33,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:19:33,292 INFO L225 Difference]: With dead ends: 8459 [2019-10-07 14:19:33,295 INFO L226 Difference]: Without dead ends: 4693 [2019-10-07 14:19:33,320 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2019-10-07 14:19:33,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4693 states. [2019-10-07 14:19:33,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4693 to 4572. [2019-10-07 14:19:33,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4572 states. [2019-10-07 14:19:33,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4572 states to 4572 states and 6885 transitions. [2019-10-07 14:19:33,664 INFO L78 Accepts]: Start accepts. Automaton has 4572 states and 6885 transitions. Word has length 120 [2019-10-07 14:19:33,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:19:33,665 INFO L462 AbstractCegarLoop]: Abstraction has 4572 states and 6885 transitions. [2019-10-07 14:19:33,665 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-07 14:19:33,666 INFO L276 IsEmpty]: Start isEmpty. Operand 4572 states and 6885 transitions. [2019-10-07 14:19:33,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-10-07 14:19:33,674 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:19:33,675 INFO L385 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:19:33,675 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:19:33,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:19:33,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1268782595, now seen corresponding path program 1 times [2019-10-07 14:19:33,676 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:19:33,676 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:19:33,677 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:19:33,677 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:19:33,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:19:33,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:19:33,934 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-07 14:19:33,934 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:19:33,935 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 14:19:33,935 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-07 14:19:33,936 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-07 14:19:33,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-07 14:19:33,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-07 14:19:33,937 INFO L87 Difference]: Start difference. First operand 4572 states and 6885 transitions. Second operand 4 states. [2019-10-07 14:19:35,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:19:35,786 INFO L93 Difference]: Finished difference Result 11797 states and 18145 transitions. [2019-10-07 14:19:35,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-07 14:19:35,788 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 124 [2019-10-07 14:19:35,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:19:35,818 INFO L225 Difference]: With dead ends: 11797 [2019-10-07 14:19:35,818 INFO L226 Difference]: Without dead ends: 7267 [2019-10-07 14:19:35,839 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-07 14:19:35,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7267 states. [2019-10-07 14:19:36,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7267 to 7060. [2019-10-07 14:19:36,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7060 states. [2019-10-07 14:19:36,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7060 states to 7060 states and 10745 transitions. [2019-10-07 14:19:36,196 INFO L78 Accepts]: Start accepts. Automaton has 7060 states and 10745 transitions. Word has length 124 [2019-10-07 14:19:36,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:19:36,196 INFO L462 AbstractCegarLoop]: Abstraction has 7060 states and 10745 transitions. [2019-10-07 14:19:36,196 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-07 14:19:36,196 INFO L276 IsEmpty]: Start isEmpty. Operand 7060 states and 10745 transitions. [2019-10-07 14:19:36,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-10-07 14:19:36,200 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:19:36,200 INFO L385 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:19:36,201 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:19:36,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:19:36,201 INFO L82 PathProgramCache]: Analyzing trace with hash 676242935, now seen corresponding path program 1 times [2019-10-07 14:19:36,201 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:19:36,201 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:19:36,201 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:19:36,202 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:19:36,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:19:36,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:19:36,371 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-07 14:19:36,371 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:19:36,371 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 14:19:36,372 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-07 14:19:36,372 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-07 14:19:36,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-07 14:19:36,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-07 14:19:36,373 INFO L87 Difference]: Start difference. First operand 7060 states and 10745 transitions. Second operand 4 states. [2019-10-07 14:19:38,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:19:38,293 INFO L93 Difference]: Finished difference Result 19319 states and 30426 transitions. [2019-10-07 14:19:38,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-07 14:19:38,294 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 125 [2019-10-07 14:19:38,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:19:38,356 INFO L225 Difference]: With dead ends: 19319 [2019-10-07 14:19:38,356 INFO L226 Difference]: Without dead ends: 12302 [2019-10-07 14:19:38,381 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-07 14:19:38,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12302 states. [2019-10-07 14:19:39,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12302 to 12022. [2019-10-07 14:19:39,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12022 states. [2019-10-07 14:19:39,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12022 states to 12022 states and 18657 transitions. [2019-10-07 14:19:39,066 INFO L78 Accepts]: Start accepts. Automaton has 12022 states and 18657 transitions. Word has length 125 [2019-10-07 14:19:39,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:19:39,067 INFO L462 AbstractCegarLoop]: Abstraction has 12022 states and 18657 transitions. [2019-10-07 14:19:39,067 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-07 14:19:39,067 INFO L276 IsEmpty]: Start isEmpty. Operand 12022 states and 18657 transitions. [2019-10-07 14:19:39,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-10-07 14:19:39,072 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:19:39,072 INFO L385 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:19:39,072 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:19:39,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:19:39,073 INFO L82 PathProgramCache]: Analyzing trace with hash -512613435, now seen corresponding path program 1 times [2019-10-07 14:19:39,073 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:19:39,073 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:19:39,073 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:19:39,074 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:19:39,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:19:39,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:19:39,221 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-07 14:19:39,222 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:19:39,222 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 14:19:39,222 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-07 14:19:39,223 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-07 14:19:39,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-07 14:19:39,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-07 14:19:39,223 INFO L87 Difference]: Start difference. First operand 12022 states and 18657 transitions. Second operand 4 states. [2019-10-07 14:19:41,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:19:41,425 INFO L93 Difference]: Finished difference Result 34410 states and 56483 transitions. [2019-10-07 14:19:41,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-07 14:19:41,426 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 126 [2019-10-07 14:19:41,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:19:41,555 INFO L225 Difference]: With dead ends: 34410 [2019-10-07 14:19:41,556 INFO L226 Difference]: Without dead ends: 22433 [2019-10-07 14:19:41,598 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-07 14:19:41,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22433 states. [2019-10-07 14:19:44,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22433 to 22008. [2019-10-07 14:19:44,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22008 states. [2019-10-07 14:19:44,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22008 states to 22008 states and 35361 transitions. [2019-10-07 14:19:44,142 INFO L78 Accepts]: Start accepts. Automaton has 22008 states and 35361 transitions. Word has length 126 [2019-10-07 14:19:44,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:19:44,144 INFO L462 AbstractCegarLoop]: Abstraction has 22008 states and 35361 transitions. [2019-10-07 14:19:44,144 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-07 14:19:44,144 INFO L276 IsEmpty]: Start isEmpty. Operand 22008 states and 35361 transitions. [2019-10-07 14:19:44,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-10-07 14:19:44,148 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:19:44,148 INFO L385 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:19:44,148 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:19:44,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:19:44,149 INFO L82 PathProgramCache]: Analyzing trace with hash -287579725, now seen corresponding path program 1 times [2019-10-07 14:19:44,149 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:19:44,149 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:19:44,149 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:19:44,149 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:19:44,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:19:44,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:19:44,297 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-07 14:19:44,298 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:19:44,298 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 14:19:44,298 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-07 14:19:44,299 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-07 14:19:44,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-07 14:19:44,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-07 14:19:44,299 INFO L87 Difference]: Start difference. First operand 22008 states and 35361 transitions. Second operand 4 states. [2019-10-07 14:19:47,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:19:47,215 INFO L93 Difference]: Finished difference Result 64755 states and 113712 transitions. [2019-10-07 14:19:47,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-07 14:19:47,215 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 130 [2019-10-07 14:19:47,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:19:47,425 INFO L225 Difference]: With dead ends: 64755 [2019-10-07 14:19:47,425 INFO L226 Difference]: Without dead ends: 42796 [2019-10-07 14:19:47,508 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-07 14:19:47,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42796 states. [2019-10-07 14:19:49,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42796 to 42082. [2019-10-07 14:19:49,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42082 states. [2019-10-07 14:19:49,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42082 states to 42082 states and 71625 transitions. [2019-10-07 14:19:49,830 INFO L78 Accepts]: Start accepts. Automaton has 42082 states and 71625 transitions. Word has length 130 [2019-10-07 14:19:49,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:19:49,830 INFO L462 AbstractCegarLoop]: Abstraction has 42082 states and 71625 transitions. [2019-10-07 14:19:49,830 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-07 14:19:49,830 INFO L276 IsEmpty]: Start isEmpty. Operand 42082 states and 71625 transitions. [2019-10-07 14:19:49,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-10-07 14:19:49,834 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:19:49,834 INFO L385 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:19:49,835 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:19:49,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:19:49,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1258002823, now seen corresponding path program 1 times [2019-10-07 14:19:49,835 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:19:49,836 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:19:49,836 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:19:49,836 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:19:49,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:19:49,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:19:49,966 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-07 14:19:49,966 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:19:49,967 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 14:19:49,967 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-07 14:19:49,967 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-07 14:19:49,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-07 14:19:49,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-07 14:19:49,968 INFO L87 Difference]: Start difference. First operand 42082 states and 71625 transitions. Second operand 4 states. [2019-10-07 14:19:55,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:19:55,332 INFO L93 Difference]: Finished difference Result 125909 states and 245505 transitions. [2019-10-07 14:19:55,332 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-07 14:19:55,332 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 128 [2019-10-07 14:19:55,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:19:55,879 INFO L225 Difference]: With dead ends: 125909 [2019-10-07 14:19:55,879 INFO L226 Difference]: Without dead ends: 83872 [2019-10-07 14:19:55,989 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-07 14:19:56,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83872 states. [2019-10-07 14:20:00,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83872 to 81693. [2019-10-07 14:20:00,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81693 states. [2019-10-07 14:20:04,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81693 states to 81693 states and 148907 transitions. [2019-10-07 14:20:04,280 INFO L78 Accepts]: Start accepts. Automaton has 81693 states and 148907 transitions. Word has length 128 [2019-10-07 14:20:04,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:20:04,281 INFO L462 AbstractCegarLoop]: Abstraction has 81693 states and 148907 transitions. [2019-10-07 14:20:04,281 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-07 14:20:04,281 INFO L276 IsEmpty]: Start isEmpty. Operand 81693 states and 148907 transitions. [2019-10-07 14:20:04,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2019-10-07 14:20:04,289 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:20:04,290 INFO L385 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:20:04,290 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:20:04,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:20:04,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1367433322, now seen corresponding path program 1 times [2019-10-07 14:20:04,291 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:20:04,291 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:20:04,291 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:20:04,291 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:20:04,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:20:04,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:20:04,469 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-10-07 14:20:04,469 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:20:04,470 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 14:20:04,470 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-07 14:20:04,470 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-07 14:20:04,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-07 14:20:04,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-07 14:20:04,472 INFO L87 Difference]: Start difference. First operand 81693 states and 148907 transitions. Second operand 5 states. [2019-10-07 14:20:15,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:20:15,486 INFO L93 Difference]: Finished difference Result 260588 states and 509131 transitions. [2019-10-07 14:20:15,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-07 14:20:15,486 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 204 [2019-10-07 14:20:15,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:20:16,325 INFO L225 Difference]: With dead ends: 260588 [2019-10-07 14:20:16,325 INFO L226 Difference]: Without dead ends: 178938 [2019-10-07 14:20:16,522 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-07 14:20:16,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178938 states. [2019-10-07 14:20:29,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178938 to 174231. [2019-10-07 14:20:29,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174231 states. [2019-10-07 14:20:30,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174231 states to 174231 states and 333904 transitions. [2019-10-07 14:20:30,855 INFO L78 Accepts]: Start accepts. Automaton has 174231 states and 333904 transitions. Word has length 204 [2019-10-07 14:20:30,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:20:30,856 INFO L462 AbstractCegarLoop]: Abstraction has 174231 states and 333904 transitions. [2019-10-07 14:20:30,856 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-07 14:20:30,856 INFO L276 IsEmpty]: Start isEmpty. Operand 174231 states and 333904 transitions. [2019-10-07 14:20:30,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2019-10-07 14:20:30,864 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:20:30,864 INFO L385 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:20:30,864 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:20:30,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:20:30,865 INFO L82 PathProgramCache]: Analyzing trace with hash 695334874, now seen corresponding path program 1 times [2019-10-07 14:20:30,865 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:20:30,865 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:20:30,865 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:20:30,865 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:20:30,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:20:30,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:20:31,039 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-10-07 14:20:31,039 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:20:31,041 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 14:20:31,042 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-07 14:20:31,042 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-07 14:20:31,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-07 14:20:31,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-07 14:20:31,043 INFO L87 Difference]: Start difference. First operand 174231 states and 333904 transitions. Second operand 5 states. [2019-10-07 14:20:53,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:20:53,003 INFO L93 Difference]: Finished difference Result 552079 states and 1162741 transitions. [2019-10-07 14:20:53,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-07 14:20:53,003 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 204 [2019-10-07 14:20:53,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:21:03,106 INFO L225 Difference]: With dead ends: 552079 [2019-10-07 14:21:03,107 INFO L226 Difference]: Without dead ends: 377891 [2019-10-07 14:21:03,553 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-07 14:21:03,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377891 states. [2019-10-07 14:21:46,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377891 to 368530. [2019-10-07 14:21:46,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 368530 states. [2019-10-07 14:21:49,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368530 states to 368530 states and 755108 transitions. [2019-10-07 14:21:49,881 INFO L78 Accepts]: Start accepts. Automaton has 368530 states and 755108 transitions. Word has length 204 [2019-10-07 14:21:49,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:21:49,882 INFO L462 AbstractCegarLoop]: Abstraction has 368530 states and 755108 transitions. [2019-10-07 14:21:49,882 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-07 14:21:49,882 INFO L276 IsEmpty]: Start isEmpty. Operand 368530 states and 755108 transitions. [2019-10-07 14:21:49,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2019-10-07 14:21:49,890 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:21:49,890 INFO L385 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:21:49,890 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:21:49,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:21:49,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1006248569, now seen corresponding path program 1 times [2019-10-07 14:21:49,891 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:21:49,891 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:21:49,891 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:21:49,891 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:21:49,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:21:49,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:21:50,049 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-10-07 14:21:50,050 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:21:50,050 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 14:21:50,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 14:21:50,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:21:50,737 INFO L256 TraceCheckSpWp]: Trace formula consists of 3656 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-07 14:21:50,768 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 14:21:50,874 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-07 14:21:50,874 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 14:21:51,466 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-10-07 14:21:51,468 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 14:21:51,468 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 4] total 10 [2019-10-07 14:21:51,469 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-07 14:21:51,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-07 14:21:51,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-10-07 14:21:51,469 INFO L87 Difference]: Start difference. First operand 368530 states and 755108 transitions. Second operand 4 states. [2019-10-07 14:22:25,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:22:25,623 INFO L93 Difference]: Finished difference Result 763342 states and 1708580 transitions. [2019-10-07 14:22:25,623 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-07 14:22:25,623 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 182 [2019-10-07 14:22:25,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:22:29,300 INFO L225 Difference]: With dead ends: 763342 [2019-10-07 14:22:29,300 INFO L226 Difference]: Without dead ends: 394855 [2019-10-07 14:22:31,763 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 363 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-10-07 14:22:32,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394855 states. [2019-10-07 14:23:20,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394855 to 394855. [2019-10-07 14:23:20,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 394855 states. [2019-10-07 14:23:23,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394855 states to 394855 states and 804383 transitions. [2019-10-07 14:23:23,335 INFO L78 Accepts]: Start accepts. Automaton has 394855 states and 804383 transitions. Word has length 182 [2019-10-07 14:23:23,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:23:23,336 INFO L462 AbstractCegarLoop]: Abstraction has 394855 states and 804383 transitions. [2019-10-07 14:23:23,336 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-07 14:23:23,336 INFO L276 IsEmpty]: Start isEmpty. Operand 394855 states and 804383 transitions. [2019-10-07 14:23:23,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2019-10-07 14:23:23,347 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:23:23,348 INFO L385 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:23:23,564 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 14:23:23,564 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:23:23,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:23:23,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1072285983, now seen corresponding path program 1 times [2019-10-07 14:23:23,565 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:23:23,565 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:23:23,565 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:23:23,565 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:23:23,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:23:23,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:23:23,758 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-10-07 14:23:23,759 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:23:23,759 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 14:23:23,760 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-07 14:23:23,761 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-07 14:23:23,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-07 14:23:23,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-07 14:23:23,762 INFO L87 Difference]: Start difference. First operand 394855 states and 804383 transitions. Second operand 5 states. [2019-10-07 14:24:44,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:24:44,541 INFO L93 Difference]: Finished difference Result 1256269 states and 2881324 transitions. [2019-10-07 14:24:44,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-07 14:24:44,541 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 209 [2019-10-07 14:24:44,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:25:07,188 INFO L225 Difference]: With dead ends: 1256269 [2019-10-07 14:25:07,188 INFO L226 Difference]: Without dead ends: 861457 [2019-10-07 14:25:09,110 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-07 14:25:09,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861457 states.