java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/product-lines/elevator_spec3_product25.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 23:04:50,351 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 23:04:50,353 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 23:04:50,372 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 23:04:50,372 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 23:04:50,374 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 23:04:50,376 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 23:04:50,389 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 23:04:50,391 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 23:04:50,393 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 23:04:50,394 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 23:04:50,396 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 23:04:50,396 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 23:04:50,400 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 23:04:50,403 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 23:04:50,405 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 23:04:50,407 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 23:04:50,410 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 23:04:50,411 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 23:04:50,417 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 23:04:50,422 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 23:04:50,426 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 23:04:50,429 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 23:04:50,430 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 23:04:50,434 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 23:04:50,434 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 23:04:50,434 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 23:04:50,436 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 23:04:50,438 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 23:04:50,439 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 23:04:50,439 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 23:04:50,440 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 23:04:50,441 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 23:04:50,442 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 23:04:50,444 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 23:04:50,444 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 23:04:50,444 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 23:04:50,445 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 23:04:50,445 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 23:04:50,446 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 23:04:50,447 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 23:04:50,448 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 [2019-10-13 23:04:50,467 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 23:04:50,467 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 23:04:50,469 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 23:04:50,469 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 23:04:50,469 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 23:04:50,469 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 23:04:50,470 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 23:04:50,470 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 23:04:50,470 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 23:04:50,470 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 23:04:50,471 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 23:04:50,472 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 23:04:50,472 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 23:04:50,472 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 23:04:50,473 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 23:04:50,473 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 23:04:50,473 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 23:04:50,473 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 23:04:50,473 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 23:04:50,474 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 23:04:50,474 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 23:04:50,474 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 23:04:50,474 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 23:04:50,474 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 23:04:50,475 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 23:04:50,475 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 23:04:50,475 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 23:04:50,475 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 23:04:50,475 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 [2019-10-13 23:04:50,774 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 23:04:50,787 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 23:04:50,791 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 23:04:50,793 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 23:04:50,793 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 23:04:50,794 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec3_product25.cil.c [2019-10-13 23:04:50,860 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f103f94e/8fc74a6e274e41dfbbf38e985cf25862/FLAG409bda60d [2019-10-13 23:04:51,524 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 23:04:51,525 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec3_product25.cil.c [2019-10-13 23:04:51,561 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f103f94e/8fc74a6e274e41dfbbf38e985cf25862/FLAG409bda60d [2019-10-13 23:04:51,676 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f103f94e/8fc74a6e274e41dfbbf38e985cf25862 [2019-10-13 23:04:51,686 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 23:04:51,688 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 23:04:51,689 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 23:04:51,689 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 23:04:51,693 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 23:04:51,694 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:04:51" (1/1) ... [2019-10-13 23:04:51,698 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@507cfa22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:04:51, skipping insertion in model container [2019-10-13 23:04:51,698 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:04:51" (1/1) ... [2019-10-13 23:04:51,704 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 23:04:51,784 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 23:04:52,539 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 23:04:52,560 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 23:04:52,731 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 23:04:52,805 INFO L192 MainTranslator]: Completed translation [2019-10-13 23:04:52,806 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:04:52 WrapperNode [2019-10-13 23:04:52,807 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 23:04:52,807 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 23:04:52,808 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 23:04:52,808 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 23:04:52,820 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:04:52" (1/1) ... [2019-10-13 23:04:52,820 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:04:52" (1/1) ... [2019-10-13 23:04:52,852 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:04:52" (1/1) ... [2019-10-13 23:04:52,853 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:04:52" (1/1) ... [2019-10-13 23:04:52,912 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:04:52" (1/1) ... [2019-10-13 23:04:52,950 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:04:52" (1/1) ... [2019-10-13 23:04:52,962 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:04:52" (1/1) ... [2019-10-13 23:04:52,983 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 23:04:52,983 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 23:04:52,984 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 23:04:52,984 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 23:04:52,985 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:04:52" (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 [2019-10-13 23:04:53,106 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 23:04:53,107 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 23:04:53,107 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-13 23:04:53,107 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-13 23:04:53,108 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-13 23:04:53,109 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-13 23:04:53,109 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-13 23:04:53,110 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-13 23:04:53,110 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-13 23:04:53,110 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-10-13 23:04:53,111 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-10-13 23:04:53,112 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-10-13 23:04:53,112 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-10-13 23:04:53,113 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-10-13 23:04:53,113 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-10-13 23:04:53,113 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-10-13 23:04:53,117 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-10-13 23:04:53,117 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-13 23:04:53,117 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-13 23:04:53,118 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-13 23:04:53,118 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-13 23:04:53,119 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-13 23:04:53,119 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-10-13 23:04:53,119 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-10-13 23:04:53,120 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-10-13 23:04:53,120 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-10-13 23:04:53,120 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-10-13 23:04:53,121 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-10-13 23:04:53,121 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-10-13 23:04:53,121 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-10-13 23:04:53,121 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-13 23:04:53,122 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-10-13 23:04:53,122 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-10-13 23:04:53,122 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-10-13 23:04:53,123 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-13 23:04:53,123 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-10-13 23:04:53,123 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-13 23:04:53,124 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-13 23:04:53,124 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 23:04:53,124 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-10-13 23:04:53,124 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-10-13 23:04:53,125 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-13 23:04:53,125 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-10-13 23:04:53,125 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-10-13 23:04:53,125 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-10-13 23:04:53,125 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-10-13 23:04:53,126 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-10-13 23:04:53,126 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-10-13 23:04:53,126 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__weight [2019-10-13 23:04:53,126 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-10-13 23:04:53,126 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-10-13 23:04:53,127 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-10-13 23:04:53,127 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-10-13 23:04:53,127 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-10-13 23:04:53,127 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-10-13 23:04:53,127 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-10-13 23:04:53,128 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-10-13 23:04:53,128 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-10-13 23:04:53,128 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-10-13 23:04:53,129 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-10-13 23:04:53,129 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-10-13 23:04:53,129 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-10-13 23:04:53,129 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-10-13 23:04:53,130 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-10-13 23:04:53,130 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-10-13 23:04:53,130 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-13 23:04:53,130 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-10-13 23:04:53,130 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-10-13 23:04:53,131 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification3_spec__1 [2019-10-13 23:04:53,131 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification3_spec__2 [2019-10-13 23:04:53,131 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-10-13 23:04:53,131 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-10-13 23:04:53,131 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-10-13 23:04:53,132 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 23:04:53,133 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 23:04:53,133 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-13 23:04:53,134 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-13 23:04:53,134 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-13 23:04:53,134 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-13 23:04:53,134 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-13 23:04:53,135 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-13 23:04:53,135 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 23:04:53,136 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-13 23:04:53,136 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-13 23:04:53,136 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 23:04:53,136 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-13 23:04:53,136 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-13 23:04:53,137 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 23:04:53,138 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-13 23:04:53,138 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-13 23:04:53,138 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 23:04:53,138 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-13 23:04:53,138 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-10-13 23:04:53,139 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-10-13 23:04:53,139 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-10-13 23:04:53,139 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-10-13 23:04:53,139 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-10-13 23:04:53,140 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-10-13 23:04:53,140 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-10-13 23:04:53,140 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-10-13 23:04:53,140 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-13 23:04:53,141 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-13 23:04:53,141 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-13 23:04:53,141 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-13 23:04:53,142 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-13 23:04:53,142 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 23:04:53,142 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-10-13 23:04:53,142 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-10-13 23:04:53,143 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-10-13 23:04:53,143 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-10-13 23:04:53,143 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-10-13 23:04:53,143 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-10-13 23:04:53,144 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-10-13 23:04:53,144 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-10-13 23:04:53,144 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-13 23:04:53,145 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-10-13 23:04:53,145 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-10-13 23:04:53,146 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-10-13 23:04:53,146 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-13 23:04:53,146 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-10-13 23:04:53,147 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-10-13 23:04:53,147 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-10-13 23:04:53,147 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-10-13 23:04:53,148 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-10-13 23:04:53,150 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-13 23:04:53,150 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-10-13 23:04:53,150 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-13 23:04:53,150 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-13 23:04:53,151 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-13 23:04:53,151 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 23:04:53,151 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-10-13 23:04:53,152 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-10-13 23:04:53,152 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-10-13 23:04:53,154 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-13 23:04:53,158 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-10-13 23:04:53,158 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-10-13 23:04:53,159 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-10-13 23:04:53,159 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-10-13 23:04:53,160 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-10-13 23:04:53,160 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-10-13 23:04:53,160 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-10-13 23:04:53,160 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-10-13 23:04:53,161 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-10-13 23:04:53,161 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-10-13 23:04:53,167 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__weight [2019-10-13 23:04:53,168 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-10-13 23:04:53,168 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-10-13 23:04:53,168 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-10-13 23:04:53,169 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-10-13 23:04:53,169 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-10-13 23:04:53,169 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-10-13 23:04:53,171 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-10-13 23:04:53,171 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-10-13 23:04:53,171 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-10-13 23:04:53,171 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-10-13 23:04:53,172 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification3_spec__1 [2019-10-13 23:04:53,172 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification3_spec__2 [2019-10-13 23:04:53,172 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-10-13 23:04:53,172 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 23:04:53,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-13 23:04:53,173 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 23:04:58,229 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 23:04:58,230 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-13 23:04:58,232 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:04:58 BoogieIcfgContainer [2019-10-13 23:04:58,232 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 23:04:58,233 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 23:04:58,233 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 23:04:58,236 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 23:04:58,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:04:51" (1/3) ... [2019-10-13 23:04:58,238 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2067c507 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:04:58, skipping insertion in model container [2019-10-13 23:04:58,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:04:52" (2/3) ... [2019-10-13 23:04:58,238 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2067c507 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:04:58, skipping insertion in model container [2019-10-13 23:04:58,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:04:58" (3/3) ... [2019-10-13 23:04:58,240 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product25.cil.c [2019-10-13 23:04:58,250 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 23:04:58,260 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 23:04:58,271 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 23:04:58,303 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 23:04:58,303 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 23:04:58,303 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 23:04:58,303 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 23:04:58,303 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 23:04:58,303 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 23:04:58,303 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 23:04:58,304 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 23:04:58,334 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states. [2019-10-13 23:04:58,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-10-13 23:04:58,351 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:04:58,352 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:04:58,354 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:04:58,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:04:58,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1500061591, now seen corresponding path program 1 times [2019-10-13 23:04:58,370 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:04:58,371 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093845863] [2019-10-13 23:04:58,371 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:04:58,371 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:04:58,371 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:04:58,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:04:59,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-13 23:04:59,133 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093845863] [2019-10-13 23:04:59,134 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:04:59,134 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-13 23:04:59,134 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073821442] [2019-10-13 23:04:59,141 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 23:04:59,142 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:04:59,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 23:04:59,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-13 23:04:59,160 INFO L87 Difference]: Start difference. First operand 573 states. Second operand 8 states. [2019-10-13 23:05:02,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:05:02,388 INFO L93 Difference]: Finished difference Result 1614 states and 2480 transitions. [2019-10-13 23:05:02,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 23:05:02,390 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 98 [2019-10-13 23:05:02,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:05:02,425 INFO L225 Difference]: With dead ends: 1614 [2019-10-13 23:05:02,426 INFO L226 Difference]: Without dead ends: 1163 [2019-10-13 23:05:02,452 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2019-10-13 23:05:02,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1163 states. [2019-10-13 23:05:02,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1163 to 1153. [2019-10-13 23:05:02,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1153 states. [2019-10-13 23:05:02,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1153 states to 1153 states and 1725 transitions. [2019-10-13 23:05:02,651 INFO L78 Accepts]: Start accepts. Automaton has 1153 states and 1725 transitions. Word has length 98 [2019-10-13 23:05:02,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:05:02,652 INFO L462 AbstractCegarLoop]: Abstraction has 1153 states and 1725 transitions. [2019-10-13 23:05:02,652 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 23:05:02,652 INFO L276 IsEmpty]: Start isEmpty. Operand 1153 states and 1725 transitions. [2019-10-13 23:05:02,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-10-13 23:05:02,669 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:05:02,670 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:05:02,670 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:05:02,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:05:02,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1113138244, now seen corresponding path program 1 times [2019-10-13 23:05:02,672 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:05:02,672 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505792421] [2019-10-13 23:05:02,672 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:05:02,672 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:05:02,673 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:05:02,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:05:03,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-13 23:05:03,108 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505792421] [2019-10-13 23:05:03,109 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:05:03,109 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-13 23:05:03,109 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429203594] [2019-10-13 23:05:03,111 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 23:05:03,111 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:05:03,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 23:05:03,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-10-13 23:05:03,115 INFO L87 Difference]: Start difference. First operand 1153 states and 1725 transitions. Second operand 8 states. [2019-10-13 23:05:03,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:05:03,217 INFO L93 Difference]: Finished difference Result 2012 states and 3042 transitions. [2019-10-13 23:05:03,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 23:05:03,217 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 103 [2019-10-13 23:05:03,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:05:03,228 INFO L225 Difference]: With dead ends: 2012 [2019-10-13 23:05:03,229 INFO L226 Difference]: Without dead ends: 1171 [2019-10-13 23:05:03,235 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-10-13 23:05:03,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1171 states. [2019-10-13 23:05:03,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1171 to 1171. [2019-10-13 23:05:03,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1171 states. [2019-10-13 23:05:03,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1171 states to 1171 states and 1746 transitions. [2019-10-13 23:05:03,316 INFO L78 Accepts]: Start accepts. Automaton has 1171 states and 1746 transitions. Word has length 103 [2019-10-13 23:05:03,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:05:03,319 INFO L462 AbstractCegarLoop]: Abstraction has 1171 states and 1746 transitions. [2019-10-13 23:05:03,319 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 23:05:03,319 INFO L276 IsEmpty]: Start isEmpty. Operand 1171 states and 1746 transitions. [2019-10-13 23:05:03,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-10-13 23:05:03,325 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:05:03,325 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:05:03,325 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:05:03,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:05:03,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1868811998, now seen corresponding path program 1 times [2019-10-13 23:05:03,326 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:05:03,326 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484716579] [2019-10-13 23:05:03,326 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:05:03,326 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:05:03,327 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:05:03,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:05:03,558 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 23:05:03,558 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484716579] [2019-10-13 23:05:03,559 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985228606] [2019-10-13 23:05:03,559 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:05:04,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:05:04,290 INFO L256 TraceCheckSpWp]: Trace formula consists of 2981 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-13 23:05:04,309 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:05:04,531 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-13 23:05:04,531 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:05:04,607 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:05:04,734 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 23:05:04,734 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 23:05:04,734 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [7] total 12 [2019-10-13 23:05:04,735 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456858193] [2019-10-13 23:05:04,736 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 23:05:04,736 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:05:04,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 23:05:04,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2019-10-13 23:05:04,737 INFO L87 Difference]: Start difference. First operand 1171 states and 1746 transitions. Second operand 7 states. [2019-10-13 23:05:05,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:05:05,750 INFO L93 Difference]: Finished difference Result 2061 states and 3106 transitions. [2019-10-13 23:05:05,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 23:05:05,750 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 107 [2019-10-13 23:05:05,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:05:05,763 INFO L225 Difference]: With dead ends: 2061 [2019-10-13 23:05:05,763 INFO L226 Difference]: Without dead ends: 1207 [2019-10-13 23:05:05,770 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 208 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2019-10-13 23:05:05,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1207 states. [2019-10-13 23:05:05,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1207 to 1175. [2019-10-13 23:05:05,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1175 states. [2019-10-13 23:05:05,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1175 states to 1175 states and 1749 transitions. [2019-10-13 23:05:05,889 INFO L78 Accepts]: Start accepts. Automaton has 1175 states and 1749 transitions. Word has length 107 [2019-10-13 23:05:05,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:05:05,890 INFO L462 AbstractCegarLoop]: Abstraction has 1175 states and 1749 transitions. [2019-10-13 23:05:05,890 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 23:05:05,890 INFO L276 IsEmpty]: Start isEmpty. Operand 1175 states and 1749 transitions. [2019-10-13 23:05:05,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-10-13 23:05:05,905 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:05:05,906 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:05:06,116 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:05:06,117 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:05:06,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:05:06,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1196719180, now seen corresponding path program 1 times [2019-10-13 23:05:06,118 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:05:06,119 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721854626] [2019-10-13 23:05:06,119 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:05:06,119 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:05:06,120 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:05:06,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:05:06,480 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 23:05:06,481 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721854626] [2019-10-13 23:05:06,481 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913586034] [2019-10-13 23:05:06,481 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:05:07,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:05:07,044 INFO L256 TraceCheckSpWp]: Trace formula consists of 2970 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 23:05:07,052 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:05:07,084 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-13 23:05:07,085 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:05:07,249 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 23:05:07,250 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 23:05:07,251 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [7] total 10 [2019-10-13 23:05:07,251 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829948512] [2019-10-13 23:05:07,252 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 23:05:07,252 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:05:07,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 23:05:07,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-10-13 23:05:07,253 INFO L87 Difference]: Start difference. First operand 1175 states and 1749 transitions. Second operand 5 states. [2019-10-13 23:05:07,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:05:07,438 INFO L93 Difference]: Finished difference Result 2163 states and 3293 transitions. [2019-10-13 23:05:07,439 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 23:05:07,439 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 108 [2019-10-13 23:05:07,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:05:07,452 INFO L225 Difference]: With dead ends: 2163 [2019-10-13 23:05:07,452 INFO L226 Difference]: Without dead ends: 1175 [2019-10-13 23:05:07,459 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 214 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2019-10-13 23:05:07,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1175 states. [2019-10-13 23:05:07,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1175 to 1175. [2019-10-13 23:05:07,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1175 states. [2019-10-13 23:05:07,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1175 states to 1175 states and 1731 transitions. [2019-10-13 23:05:07,528 INFO L78 Accepts]: Start accepts. Automaton has 1175 states and 1731 transitions. Word has length 108 [2019-10-13 23:05:07,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:05:07,529 INFO L462 AbstractCegarLoop]: Abstraction has 1175 states and 1731 transitions. [2019-10-13 23:05:07,529 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 23:05:07,529 INFO L276 IsEmpty]: Start isEmpty. Operand 1175 states and 1731 transitions. [2019-10-13 23:05:07,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-10-13 23:05:07,533 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:05:07,533 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:05:07,740 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:05:07,741 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:05:07,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:05:07,742 INFO L82 PathProgramCache]: Analyzing trace with hash -287959244, now seen corresponding path program 1 times [2019-10-13 23:05:07,742 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:05:07,743 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264803337] [2019-10-13 23:05:07,743 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:05:07,743 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:05:07,743 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:05:07,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:05:07,998 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 23:05:07,998 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264803337] [2019-10-13 23:05:07,999 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169677764] [2019-10-13 23:05:07,999 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:05:08,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:05:08,596 INFO L256 TraceCheckSpWp]: Trace formula consists of 2980 conjuncts, 34 conjunts are in the unsatisfiable core [2019-10-13 23:05:08,608 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:05:08,673 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:05:08,693 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:05:08,775 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 23:05:08,775 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:05:08,976 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:05:09,161 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:05:09,164 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:05:09,242 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 23:05:09,242 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 23:05:09,242 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [7, 10] total 23 [2019-10-13 23:05:09,243 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952579755] [2019-10-13 23:05:09,244 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-13 23:05:09,244 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:05:09,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-13 23:05:09,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2019-10-13 23:05:09,245 INFO L87 Difference]: Start difference. First operand 1175 states and 1731 transitions. Second operand 10 states. [2019-10-13 23:05:14,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:05:14,508 INFO L93 Difference]: Finished difference Result 2910 states and 4402 transitions. [2019-10-13 23:05:14,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-13 23:05:14,509 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 110 [2019-10-13 23:05:14,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:05:14,543 INFO L225 Difference]: With dead ends: 2910 [2019-10-13 23:05:14,543 INFO L226 Difference]: Without dead ends: 2137 [2019-10-13 23:05:14,553 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=154, Invalid=902, Unknown=0, NotChecked=0, Total=1056 [2019-10-13 23:05:14,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2137 states. [2019-10-13 23:05:14,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2137 to 2020. [2019-10-13 23:05:14,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2020 states. [2019-10-13 23:05:14,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2020 states to 2020 states and 3016 transitions. [2019-10-13 23:05:14,770 INFO L78 Accepts]: Start accepts. Automaton has 2020 states and 3016 transitions. Word has length 110 [2019-10-13 23:05:14,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:05:14,771 INFO L462 AbstractCegarLoop]: Abstraction has 2020 states and 3016 transitions. [2019-10-13 23:05:14,771 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-13 23:05:14,772 INFO L276 IsEmpty]: Start isEmpty. Operand 2020 states and 3016 transitions. [2019-10-13 23:05:14,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-10-13 23:05:14,777 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:05:14,777 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:05:14,988 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:05:14,988 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:05:14,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:05:14,989 INFO L82 PathProgramCache]: Analyzing trace with hash -43094052, now seen corresponding path program 1 times [2019-10-13 23:05:14,989 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:05:14,990 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285084490] [2019-10-13 23:05:14,990 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:05:14,990 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:05:14,990 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:05:15,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:05:15,245 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 23:05:15,246 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285084490] [2019-10-13 23:05:15,246 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542250809] [2019-10-13 23:05:15,246 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:05:15,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:05:15,850 INFO L256 TraceCheckSpWp]: Trace formula consists of 2981 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 23:05:15,856 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:05:15,886 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-13 23:05:15,887 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:05:16,001 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-13 23:05:16,001 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 23:05:16,002 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 8 [2019-10-13 23:05:16,002 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81892495] [2019-10-13 23:05:16,003 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 23:05:16,004 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:05:16,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 23:05:16,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-10-13 23:05:16,004 INFO L87 Difference]: Start difference. First operand 2020 states and 3016 transitions. Second operand 3 states. [2019-10-13 23:05:16,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:05:16,292 INFO L93 Difference]: Finished difference Result 5789 states and 8901 transitions. [2019-10-13 23:05:16,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 23:05:16,293 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 111 [2019-10-13 23:05:16,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:05:16,335 INFO L225 Difference]: With dead ends: 5789 [2019-10-13 23:05:16,335 INFO L226 Difference]: Without dead ends: 3800 [2019-10-13 23:05:16,355 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-10-13 23:05:16,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3800 states. [2019-10-13 23:05:16,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3800 to 3677. [2019-10-13 23:05:16,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3677 states. [2019-10-13 23:05:16,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3677 states to 3677 states and 5541 transitions. [2019-10-13 23:05:16,673 INFO L78 Accepts]: Start accepts. Automaton has 3677 states and 5541 transitions. Word has length 111 [2019-10-13 23:05:16,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:05:16,675 INFO L462 AbstractCegarLoop]: Abstraction has 3677 states and 5541 transitions. [2019-10-13 23:05:16,675 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 23:05:16,676 INFO L276 IsEmpty]: Start isEmpty. Operand 3677 states and 5541 transitions. [2019-10-13 23:05:16,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-10-13 23:05:16,680 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:05:16,680 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:05:16,897 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:05:16,897 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:05:16,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:05:16,898 INFO L82 PathProgramCache]: Analyzing trace with hash -191467676, now seen corresponding path program 1 times [2019-10-13 23:05:16,898 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:05:16,898 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537213303] [2019-10-13 23:05:16,898 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:05:16,899 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:05:16,899 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:05:16,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:05:17,136 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 23:05:17,137 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537213303] [2019-10-13 23:05:17,138 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255793858] [2019-10-13 23:05:17,138 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:05:17,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:05:17,983 INFO L256 TraceCheckSpWp]: Trace formula consists of 2970 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-13 23:05:17,989 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:05:18,026 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-13 23:05:18,027 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:05:18,121 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 23:05:18,122 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 23:05:18,123 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [11] total 12 [2019-10-13 23:05:18,123 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593215146] [2019-10-13 23:05:18,125 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 23:05:18,125 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:05:18,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 23:05:18,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-10-13 23:05:18,126 INFO L87 Difference]: Start difference. First operand 3677 states and 5541 transitions. Second operand 3 states. [2019-10-13 23:05:18,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:05:18,386 INFO L93 Difference]: Finished difference Result 8236 states and 12606 transitions. [2019-10-13 23:05:18,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 23:05:18,386 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 110 [2019-10-13 23:05:18,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:05:18,424 INFO L225 Difference]: With dead ends: 8236 [2019-10-13 23:05:18,424 INFO L226 Difference]: Without dead ends: 4590 [2019-10-13 23:05:18,446 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 222 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-10-13 23:05:18,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4590 states. [2019-10-13 23:05:18,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4590 to 4480. [2019-10-13 23:05:18,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4480 states. [2019-10-13 23:05:18,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4480 states to 4480 states and 6770 transitions. [2019-10-13 23:05:18,744 INFO L78 Accepts]: Start accepts. Automaton has 4480 states and 6770 transitions. Word has length 110 [2019-10-13 23:05:18,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:05:18,746 INFO L462 AbstractCegarLoop]: Abstraction has 4480 states and 6770 transitions. [2019-10-13 23:05:18,746 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 23:05:18,746 INFO L276 IsEmpty]: Start isEmpty. Operand 4480 states and 6770 transitions. [2019-10-13 23:05:18,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-10-13 23:05:18,752 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:05:18,752 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:05:18,970 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:05:18,971 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:05:18,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:05:18,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1280558161, now seen corresponding path program 1 times [2019-10-13 23:05:18,971 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:05:18,971 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867799924] [2019-10-13 23:05:18,972 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:05:18,972 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:05:18,972 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:05:19,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:05:19,186 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-13 23:05:19,186 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867799924] [2019-10-13 23:05:19,187 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758853768] [2019-10-13 23:05:19,187 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:05:19,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:05:19,833 INFO L256 TraceCheckSpWp]: Trace formula consists of 3041 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-13 23:05:19,845 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:05:19,879 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-13 23:05:19,880 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:05:20,010 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 23:05:20,010 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 23:05:20,010 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [11] total 12 [2019-10-13 23:05:20,011 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22205400] [2019-10-13 23:05:20,011 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 23:05:20,012 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:05:20,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 23:05:20,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-10-13 23:05:20,012 INFO L87 Difference]: Start difference. First operand 4480 states and 6770 transitions. Second operand 3 states. [2019-10-13 23:05:20,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:05:20,299 INFO L93 Difference]: Finished difference Result 9850 states and 15162 transitions. [2019-10-13 23:05:20,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 23:05:20,300 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 129 [2019-10-13 23:05:20,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:05:20,346 INFO L225 Difference]: With dead ends: 9850 [2019-10-13 23:05:20,346 INFO L226 Difference]: Without dead ends: 5401 [2019-10-13 23:05:20,377 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 260 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-10-13 23:05:20,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5401 states. [2019-10-13 23:05:20,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5401 to 5200. [2019-10-13 23:05:20,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5200 states. [2019-10-13 23:05:20,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5200 states to 5200 states and 7858 transitions. [2019-10-13 23:05:20,689 INFO L78 Accepts]: Start accepts. Automaton has 5200 states and 7858 transitions. Word has length 129 [2019-10-13 23:05:20,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:05:20,689 INFO L462 AbstractCegarLoop]: Abstraction has 5200 states and 7858 transitions. [2019-10-13 23:05:20,689 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 23:05:20,690 INFO L276 IsEmpty]: Start isEmpty. Operand 5200 states and 7858 transitions. [2019-10-13 23:05:20,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-10-13 23:05:20,694 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:05:20,694 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:05:20,902 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:05:20,903 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:05:20,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:05:20,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1202175783, now seen corresponding path program 1 times [2019-10-13 23:05:20,904 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:05:20,904 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791601067] [2019-10-13 23:05:20,904 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:05:20,905 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:05:20,905 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:05:20,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:05:21,103 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-13 23:05:21,104 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791601067] [2019-10-13 23:05:21,104 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8914968] [2019-10-13 23:05:21,104 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true