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_product21.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 23:04:46,341 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 23:04:46,343 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 23:04:46,356 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 23:04:46,356 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 23:04:46,357 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 23:04:46,358 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 23:04:46,360 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 23:04:46,362 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 23:04:46,363 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 23:04:46,364 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 23:04:46,365 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 23:04:46,365 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 23:04:46,366 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 23:04:46,367 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 23:04:46,369 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 23:04:46,369 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 23:04:46,370 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 23:04:46,372 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 23:04:46,374 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 23:04:46,375 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 23:04:46,376 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 23:04:46,377 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 23:04:46,378 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 23:04:46,380 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 23:04:46,380 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 23:04:46,380 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 23:04:46,381 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 23:04:46,382 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 23:04:46,383 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 23:04:46,383 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 23:04:46,385 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 23:04:46,386 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 23:04:46,387 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 23:04:46,388 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 23:04:46,388 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 23:04:46,389 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 23:04:46,389 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 23:04:46,392 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 23:04:46,393 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 23:04:46,394 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 23:04:46,397 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 23:04:46,418 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 23:04:46,419 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 23:04:46,421 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 23:04:46,421 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 23:04:46,421 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 23:04:46,422 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 23:04:46,422 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 23:04:46,422 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 23:04:46,422 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 23:04:46,422 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 23:04:46,424 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 23:04:46,424 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 23:04:46,424 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 23:04:46,424 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 23:04:46,425 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 23:04:46,425 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 23:04:46,425 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 23:04:46,425 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 23:04:46,425 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 23:04:46,426 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 23:04:46,426 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 23:04:46,426 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 23:04:46,426 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 23:04:46,427 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 23:04:46,427 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 23:04:46,427 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 23:04:46,427 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 23:04:46,427 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 23:04:46,428 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 23:04:46,716 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 23:04:46,729 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 23:04:46,733 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 23:04:46,734 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 23:04:46,735 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 23:04:46,735 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec3_product21.cil.c [2019-10-13 23:04:46,797 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e5cbf982/af22b2a28cb54e6a9afa0e1812cf9a22/FLAGbbe6d64c9 [2019-10-13 23:04:47,491 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 23:04:47,492 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec3_product21.cil.c [2019-10-13 23:04:47,513 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e5cbf982/af22b2a28cb54e6a9afa0e1812cf9a22/FLAGbbe6d64c9 [2019-10-13 23:04:47,639 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e5cbf982/af22b2a28cb54e6a9afa0e1812cf9a22 [2019-10-13 23:04:47,649 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 23:04:47,651 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 23:04:47,652 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 23:04:47,652 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 23:04:47,656 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 23:04:47,657 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:04:47" (1/1) ... [2019-10-13 23:04:47,660 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14543c48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:04:47, skipping insertion in model container [2019-10-13 23:04:47,661 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:04:47" (1/1) ... [2019-10-13 23:04:47,668 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 23:04:47,750 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 23:04:48,559 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 23:04:48,578 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 23:04:48,707 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 23:04:48,771 INFO L192 MainTranslator]: Completed translation [2019-10-13 23:04:48,772 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:04:48 WrapperNode [2019-10-13 23:04:48,773 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 23:04:48,774 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 23:04:48,774 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 23:04:48,774 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 23:04:48,790 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:04:48" (1/1) ... [2019-10-13 23:04:48,790 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:04:48" (1/1) ... [2019-10-13 23:04:48,825 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:04:48" (1/1) ... [2019-10-13 23:04:48,826 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:04:48" (1/1) ... [2019-10-13 23:04:48,908 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:04:48" (1/1) ... [2019-10-13 23:04:48,955 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:04:48" (1/1) ... [2019-10-13 23:04:48,976 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:04:48" (1/1) ... [2019-10-13 23:04:49,001 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 23:04:49,002 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 23:04:49,002 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 23:04:49,002 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 23:04:49,003 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:04:48" (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 23:04:49,091 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 23:04:49,091 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 23:04:49,092 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-13 23:04:49,092 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-10-13 23:04:49,092 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-10-13 23:04:49,093 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-10-13 23:04:49,093 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-10-13 23:04:49,094 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-10-13 23:04:49,094 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-10-13 23:04:49,094 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-10-13 23:04:49,094 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-10-13 23:04:49,094 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-13 23:04:49,095 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-10-13 23:04:49,095 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-10-13 23:04:49,095 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-10-13 23:04:49,095 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-13 23:04:49,096 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-10-13 23:04:49,096 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-13 23:04:49,096 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-13 23:04:49,096 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 23:04:49,097 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-10-13 23:04:49,097 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-10-13 23:04:49,098 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-10-13 23:04:49,098 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-10-13 23:04:49,098 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-10-13 23:04:49,098 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-10-13 23:04:49,098 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-10-13 23:04:49,099 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-10-13 23:04:49,099 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-10-13 23:04:49,099 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-10-13 23:04:49,099 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-10-13 23:04:49,099 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-10-13 23:04:49,099 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-10-13 23:04:49,100 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-10-13 23:04:49,100 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-10-13 23:04:49,100 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-10-13 23:04:49,100 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-10-13 23:04:49,100 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-10-13 23:04:49,101 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-10-13 23:04:49,101 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-10-13 23:04:49,101 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-10-13 23:04:49,101 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2019-10-13 23:04:49,101 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-10-13 23:04:49,102 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-10-13 23:04:49,102 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-10-13 23:04:49,102 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__weight [2019-10-13 23:04:49,102 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-10-13 23:04:49,102 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-10-13 23:04:49,102 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-10-13 23:04:49,103 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-13 23:04:49,103 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-10-13 23:04:49,103 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-10-13 23:04:49,103 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-10-13 23:04:49,103 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-10-13 23:04:49,104 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-10-13 23:04:49,104 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-10-13 23:04:49,104 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-10-13 23:04:49,104 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-10-13 23:04:49,104 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-10-13 23:04:49,105 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-10-13 23:04:49,105 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-13 23:04:49,105 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification3_spec__1 [2019-10-13 23:04:49,105 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification3_spec__2 [2019-10-13 23:04:49,105 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-13 23:04:49,106 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-13 23:04:49,106 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-13 23:04:49,106 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-13 23:04:49,106 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-13 23:04:49,106 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-13 23:04:49,107 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-13 23:04:49,107 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-13 23:04:49,107 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-13 23:04:49,107 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-13 23:04:49,107 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-13 23:04:49,108 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 23:04:49,108 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 23:04:49,108 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 23:04:49,108 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-10-13 23:04:49,109 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-10-13 23:04:49,109 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-10-13 23:04:49,111 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-10-13 23:04:49,111 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-10-13 23:04:49,111 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-10-13 23:04:49,111 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-10-13 23:04:49,111 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-10-13 23:04:49,112 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-10-13 23:04:49,112 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-13 23:04:49,113 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-10-13 23:04:49,113 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-10-13 23:04:49,113 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-10-13 23:04:49,114 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-13 23:04:49,114 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-10-13 23:04:49,114 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-10-13 23:04:49,114 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-10-13 23:04:49,114 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-10-13 23:04:49,114 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-10-13 23:04:49,115 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-13 23:04:49,115 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-10-13 23:04:49,115 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-13 23:04:49,115 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-13 23:04:49,115 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-13 23:04:49,115 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-13 23:04:49,116 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-13 23:04:49,116 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-13 23:04:49,116 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 23:04:49,116 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-10-13 23:04:49,116 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-10-13 23:04:49,117 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-10-13 23:04:49,117 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-10-13 23:04:49,117 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-10-13 23:04:49,117 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-13 23:04:49,117 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-10-13 23:04:49,117 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-10-13 23:04:49,118 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-10-13 23:04:49,118 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-10-13 23:04:49,118 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-10-13 23:04:49,119 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-10-13 23:04:49,119 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-10-13 23:04:49,119 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-10-13 23:04:49,119 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-10-13 23:04:49,120 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-10-13 23:04:49,120 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-10-13 23:04:49,120 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-10-13 23:04:49,120 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-10-13 23:04:49,122 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-10-13 23:04:49,122 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-10-13 23:04:49,122 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-10-13 23:04:49,122 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-10-13 23:04:49,122 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-10-13 23:04:49,123 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-10-13 23:04:49,123 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2019-10-13 23:04:49,123 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-10-13 23:04:49,124 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-10-13 23:04:49,125 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__weight [2019-10-13 23:04:49,128 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-10-13 23:04:49,129 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-10-13 23:04:49,129 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-10-13 23:04:49,129 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification3_spec__1 [2019-10-13 23:04:49,129 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification3_spec__2 [2019-10-13 23:04:49,129 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 23:04:49,130 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-10-13 23:04:49,130 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-10-13 23:04:49,130 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-13 23:04:49,130 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-13 23:04:49,137 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-13 23:04:49,138 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-13 23:04:49,138 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-13 23:04:49,138 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-13 23:04:49,138 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-13 23:04:49,138 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 23:04:49,139 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-13 23:04:49,139 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-13 23:04:49,139 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 23:04:49,139 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-13 23:04:49,139 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-13 23:04:49,140 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 23:04:49,140 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-13 23:04:49,140 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-13 23:04:49,140 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-13 23:04:49,140 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-13 23:04:49,141 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 23:04:49,141 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-13 23:04:49,141 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 23:04:54,161 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 23:04:54,161 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-13 23:04:54,164 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:04:54 BoogieIcfgContainer [2019-10-13 23:04:54,164 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 23:04:54,165 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 23:04:54,166 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 23:04:54,169 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 23:04:54,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:04:47" (1/3) ... [2019-10-13 23:04:54,170 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17f9bcaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:04:54, skipping insertion in model container [2019-10-13 23:04:54,171 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:04:48" (2/3) ... [2019-10-13 23:04:54,171 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17f9bcaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:04:54, skipping insertion in model container [2019-10-13 23:04:54,171 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:04:54" (3/3) ... [2019-10-13 23:04:54,173 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product21.cil.c [2019-10-13 23:04:54,184 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 23:04:54,194 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 23:04:54,206 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 23:04:54,240 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 23:04:54,240 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 23:04:54,240 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 23:04:54,240 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 23:04:54,241 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 23:04:54,241 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 23:04:54,241 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 23:04:54,241 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 23:04:54,337 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states. [2019-10-13 23:04:54,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-10-13 23:04:54,358 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:04:54,360 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, 1, 1] [2019-10-13 23:04:54,362 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:04:54,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:04:54,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1849535445, now seen corresponding path program 1 times [2019-10-13 23:04:54,378 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:04:54,378 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640279057] [2019-10-13 23:04:54,379 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:04:54,379 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:04:54,379 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:04:54,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:04:55,158 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 23:04:55,159 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640279057] [2019-10-13 23:04:55,160 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25552360] [2019-10-13 23:04:55,160 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 23:04:55,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:04:55,826 INFO L256 TraceCheckSpWp]: Trace formula consists of 3002 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-13 23:04:55,843 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:04:55,916 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 23:04:55,917 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:04:56,070 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 23:04:56,071 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 23:04:56,071 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [11] total 12 [2019-10-13 23:04:56,072 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492196471] [2019-10-13 23:04:56,080 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 23:04:56,081 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:04:56,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 23:04:56,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-10-13 23:04:56,098 INFO L87 Difference]: Start difference. First operand 591 states. Second operand 3 states. [2019-10-13 23:04:56,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:04:56,316 INFO L93 Difference]: Finished difference Result 1295 states and 1980 transitions. [2019-10-13 23:04:56,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 23:04:56,318 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 112 [2019-10-13 23:04:56,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:04:56,348 INFO L225 Difference]: With dead ends: 1295 [2019-10-13 23:04:56,348 INFO L226 Difference]: Without dead ends: 836 [2019-10-13 23:04:56,360 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 226 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-10-13 23:04:56,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2019-10-13 23:04:56,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 823. [2019-10-13 23:04:56,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 823 states. [2019-10-13 23:04:56,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 823 states to 823 states and 1242 transitions. [2019-10-13 23:04:56,565 INFO L78 Accepts]: Start accepts. Automaton has 823 states and 1242 transitions. Word has length 112 [2019-10-13 23:04:56,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:04:56,566 INFO L462 AbstractCegarLoop]: Abstraction has 823 states and 1242 transitions. [2019-10-13 23:04:56,566 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 23:04:56,567 INFO L276 IsEmpty]: Start isEmpty. Operand 823 states and 1242 transitions. [2019-10-13 23:04:56,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-10-13 23:04:56,578 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:04:56,578 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:04:56,786 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:04:56,787 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:04:56,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:04:56,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1890203850, now seen corresponding path program 1 times [2019-10-13 23:04:56,788 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:04:56,788 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347571238] [2019-10-13 23:04:56,789 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:04:56,789 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:04:56,789 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:04:56,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:04:57,163 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 23:04:57,164 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347571238] [2019-10-13 23:04:57,164 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482244025] [2019-10-13 23:04:57,164 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 23:04:57,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:04:57,879 INFO L256 TraceCheckSpWp]: Trace formula consists of 3013 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 23:04:57,900 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:04:57,964 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 23:04:57,965 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:04:58,143 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 23:04:58,144 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 23:04:58,144 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [7] total 10 [2019-10-13 23:04:58,144 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831277040] [2019-10-13 23:04:58,147 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 23:04:58,149 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:04:58,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 23:04:58,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-10-13 23:04:58,149 INFO L87 Difference]: Start difference. First operand 823 states and 1242 transitions. Second operand 5 states. [2019-10-13 23:05:00,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:05:00,071 INFO L93 Difference]: Finished difference Result 3140 states and 4841 transitions. [2019-10-13 23:05:00,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 23:05:00,072 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 113 [2019-10-13 23:05:00,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:05:00,094 INFO L225 Difference]: With dead ends: 3140 [2019-10-13 23:05:00,094 INFO L226 Difference]: Without dead ends: 2348 [2019-10-13 23:05:00,103 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 225 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-10-13 23:05:00,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2348 states. [2019-10-13 23:05:00,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2348 to 2298. [2019-10-13 23:05:00,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2298 states. [2019-10-13 23:05:00,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2298 states to 2298 states and 3441 transitions. [2019-10-13 23:05:00,263 INFO L78 Accepts]: Start accepts. Automaton has 2298 states and 3441 transitions. Word has length 113 [2019-10-13 23:05:00,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:05:00,264 INFO L462 AbstractCegarLoop]: Abstraction has 2298 states and 3441 transitions. [2019-10-13 23:05:00,264 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 23:05:00,265 INFO L276 IsEmpty]: Start isEmpty. Operand 2298 states and 3441 transitions. [2019-10-13 23:05:00,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-10-13 23:05:00,271 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:05:00,271 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:05:00,478 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:05:00,479 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:05:00,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:05:00,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1610128671, now seen corresponding path program 1 times [2019-10-13 23:05:00,480 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:05:00,480 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164916453] [2019-10-13 23:05:00,480 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:05:00,480 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:05:00,480 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:05:00,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:05:00,716 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 23:05:00,717 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164916453] [2019-10-13 23:05:00,717 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270205784] [2019-10-13 23:05:00,717 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 23:05:01,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:05:01,358 INFO L256 TraceCheckSpWp]: Trace formula consists of 3029 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-13 23:05:01,365 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:05:01,487 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 23:05:01,488 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:05:01,637 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 23:05:01,669 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:05:01,696 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 23:05:01,811 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 23:05:01,811 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 23:05:01,812 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [7] total 16 [2019-10-13 23:05:01,812 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085117686] [2019-10-13 23:05:01,813 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 23:05:01,813 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:05:01,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 23:05:01,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2019-10-13 23:05:01,814 INFO L87 Difference]: Start difference. First operand 2298 states and 3441 transitions. Second operand 11 states. [2019-10-13 23:05:03,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:05:03,313 INFO L93 Difference]: Finished difference Result 4335 states and 6542 transitions. [2019-10-13 23:05:03,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 23:05:03,314 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 117 [2019-10-13 23:05:03,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:05:03,339 INFO L225 Difference]: With dead ends: 4335 [2019-10-13 23:05:03,339 INFO L226 Difference]: Without dead ends: 2610 [2019-10-13 23:05:03,351 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 224 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2019-10-13 23:05:03,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2610 states. [2019-10-13 23:05:03,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2610 to 2482. [2019-10-13 23:05:03,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2482 states. [2019-10-13 23:05:03,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2482 states to 2482 states and 3693 transitions. [2019-10-13 23:05:03,548 INFO L78 Accepts]: Start accepts. Automaton has 2482 states and 3693 transitions. Word has length 117 [2019-10-13 23:05:03,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:05:03,551 INFO L462 AbstractCegarLoop]: Abstraction has 2482 states and 3693 transitions. [2019-10-13 23:05:03,551 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 23:05:03,551 INFO L276 IsEmpty]: Start isEmpty. Operand 2482 states and 3693 transitions. [2019-10-13 23:05:03,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-10-13 23:05:03,558 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:05:03,558 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:05:03,776 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:05:03,777 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:05:03,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:05:03,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1143572123, now seen corresponding path program 1 times [2019-10-13 23:05:03,777 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:05:03,777 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433888790] [2019-10-13 23:05:03,778 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:05:03,778 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:05:03,778 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:05:03,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:05:03,951 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 23:05:03,952 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433888790] [2019-10-13 23:05:03,952 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632544186] [2019-10-13 23:05:03,952 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 23:05:04,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:05:04,506 INFO L256 TraceCheckSpWp]: Trace formula consists of 3018 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 23:05:04,511 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:05:04,596 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 23:05:04,597 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:05:04,787 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:05:04,902 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 23:05:04,903 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 23:05:04,903 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [7] total 13 [2019-10-13 23:05:04,903 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547242712] [2019-10-13 23:05:04,904 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 23:05:04,904 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:05:04,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 23:05:04,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2019-10-13 23:05:04,905 INFO L87 Difference]: Start difference. First operand 2482 states and 3693 transitions. Second operand 8 states. [2019-10-13 23:05:05,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:05:05,233 INFO L93 Difference]: Finished difference Result 4911 states and 7403 transitions. [2019-10-13 23:05:05,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 23:05:05,233 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 118 [2019-10-13 23:05:05,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:05:05,259 INFO L225 Difference]: With dead ends: 4911 [2019-10-13 23:05:05,260 INFO L226 Difference]: Without dead ends: 2970 [2019-10-13 23:05:05,276 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 229 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2019-10-13 23:05:05,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2970 states. [2019-10-13 23:05:05,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2970 to 2970. [2019-10-13 23:05:05,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2970 states. [2019-10-13 23:05:05,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2970 states to 2970 states and 4437 transitions. [2019-10-13 23:05:05,450 INFO L78 Accepts]: Start accepts. Automaton has 2970 states and 4437 transitions. Word has length 118 [2019-10-13 23:05:05,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:05:05,451 INFO L462 AbstractCegarLoop]: Abstraction has 2970 states and 4437 transitions. [2019-10-13 23:05:05,451 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 23:05:05,452 INFO L276 IsEmpty]: Start isEmpty. Operand 2970 states and 4437 transitions. [2019-10-13 23:05:05,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-10-13 23:05:05,458 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:05:05,458 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:05:05,677 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:05:05,677 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:05:05,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:05:05,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1846674351, now seen corresponding path program 1 times [2019-10-13 23:05:05,678 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:05:05,678 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735167688] [2019-10-13 23:05:05,678 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:05:05,678 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:05:05,679 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:05:05,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:05:05,859 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 23:05:05,859 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735167688] [2019-10-13 23:05:05,859 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569369637] [2019-10-13 23:05:05,860 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 23:05:06,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:05:06,421 INFO L256 TraceCheckSpWp]: Trace formula consists of 3028 conjuncts, 34 conjunts are in the unsatisfiable core [2019-10-13 23:05:06,427 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:05:06,584 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2019-10-13 23:05:06,626 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:05:06,643 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:05:06,733 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 23:05:06,734 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:05:06,905 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:05:07,087 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:05:07,093 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:05:07,161 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 23:05:07,162 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 23:05:07,162 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [7, 10] total 23 [2019-10-13 23:05:07,163 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403768447] [2019-10-13 23:05:07,164 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-13 23:05:07,165 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:05:07,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-13 23:05:07,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2019-10-13 23:05:07,166 INFO L87 Difference]: Start difference. First operand 2970 states and 4437 transitions. Second operand 10 states. [2019-10-13 23:05:12,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:05:12,858 INFO L93 Difference]: Finished difference Result 5251 states and 7920 transitions. [2019-10-13 23:05:12,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-13 23:05:12,859 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 120 [2019-10-13 23:05:12,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:05:12,900 INFO L225 Difference]: With dead ends: 5251 [2019-10-13 23:05:12,901 INFO L226 Difference]: Without dead ends: 5248 [2019-10-13 23:05:12,908 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 228 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 23:05:12,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5248 states. [2019-10-13 23:05:13,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5248 to 5151. [2019-10-13 23:05:13,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5151 states. [2019-10-13 23:05:13,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5151 states to 5151 states and 7790 transitions. [2019-10-13 23:05:13,269 INFO L78 Accepts]: Start accepts. Automaton has 5151 states and 7790 transitions. Word has length 120 [2019-10-13 23:05:13,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:05:13,270 INFO L462 AbstractCegarLoop]: Abstraction has 5151 states and 7790 transitions. [2019-10-13 23:05:13,270 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-13 23:05:13,270 INFO L276 IsEmpty]: Start isEmpty. Operand 5151 states and 7790 transitions. [2019-10-13 23:05:13,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-10-13 23:05:13,275 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:05:13,275 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:05:13,483 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:05:13,483 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:05:13,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:05:13,484 INFO L82 PathProgramCache]: Analyzing trace with hash -673741192, now seen corresponding path program 1 times [2019-10-13 23:05:13,485 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:05:13,485 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105376557] [2019-10-13 23:05:13,485 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:05:13,485 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:05:13,486 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:05:13,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:05:13,718 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 23:05:13,719 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105376557] [2019-10-13 23:05:13,719 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514093774] [2019-10-13 23:05:13,719 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 23:05:14,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:05:14,313 INFO L256 TraceCheckSpWp]: Trace formula consists of 3019 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-13 23:05:14,319 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:05:14,346 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 23:05:14,346 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:05:14,437 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 23:05:14,438 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 23:05:14,438 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [11] total 12 [2019-10-13 23:05:14,438 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260831520] [2019-10-13 23:05:14,439 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 23:05:14,439 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:05:14,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 23:05:14,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-10-13 23:05:14,440 INFO L87 Difference]: Start difference. First operand 5151 states and 7790 transitions. Second operand 3 states. [2019-10-13 23:05:14,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:05:14,768 INFO L93 Difference]: Finished difference Result 12729 states and 19578 transitions. [2019-10-13 23:05:14,768 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 23:05:14,768 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 121 [2019-10-13 23:05:14,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:05:14,828 INFO L225 Difference]: With dead ends: 12729 [2019-10-13 23:05:14,829 INFO L226 Difference]: Without dead ends: 7609 [2019-10-13 23:05:14,865 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 244 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 23:05:14,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7609 states. [2019-10-13 23:05:15,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7609 to 7464. [2019-10-13 23:05:15,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7464 states. [2019-10-13 23:05:15,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7464 states to 7464 states and 11282 transitions. [2019-10-13 23:05:15,500 INFO L78 Accepts]: Start accepts. Automaton has 7464 states and 11282 transitions. Word has length 121 [2019-10-13 23:05:15,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:05:15,501 INFO L462 AbstractCegarLoop]: Abstraction has 7464 states and 11282 transitions. [2019-10-13 23:05:15,501 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 23:05:15,501 INFO L276 IsEmpty]: Start isEmpty. Operand 7464 states and 11282 transitions. [2019-10-13 23:05:15,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-10-13 23:05:15,507 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:05:15,508 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:05:15,715 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:05:15,716 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:05:15,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:05:15,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1469350349, now seen corresponding path program 1 times [2019-10-13 23:05:15,717 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:05:15,717 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429593005] [2019-10-13 23:05:15,717 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:05:15,718 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:05:15,718 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:05:15,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:05:15,970 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 23:05:15,971 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429593005] [2019-10-13 23:05:15,971 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617168812] [2019-10-13 23:05:15,971 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:05:16,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:05:16,504 INFO L256 TraceCheckSpWp]: Trace formula consists of 3031 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 23:05:16,510 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:05:16,596 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 23:05:16,596 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:05:16,734 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:05:16,855 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 23:05:16,855 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 23:05:16,856 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11, 7] total 20 [2019-10-13 23:05:16,856 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852231] [2019-10-13 23:05:16,856 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 23:05:16,857 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:05:16,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 23:05:16,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2019-10-13 23:05:16,857 INFO L87 Difference]: Start difference. First operand 7464 states and 11282 transitions. Second operand 6 states. [2019-10-13 23:05:18,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:05:18,356 INFO L93 Difference]: Finished difference Result 14506 states and 21986 transitions. [2019-10-13 23:05:18,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 23:05:18,357 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 122 [2019-10-13 23:05:18,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:05:18,403 INFO L225 Difference]: With dead ends: 14506 [2019-10-13 23:05:18,404 INFO L226 Difference]: Without dead ends: 7073 [2019-10-13 23:05:18,439 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 236 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2019-10-13 23:05:18,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7073 states. [2019-10-13 23:05:18,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7073 to 7073. [2019-10-13 23:05:18,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7073 states. [2019-10-13 23:05:18,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7073 states to 7073 states and 10688 transitions. [2019-10-13 23:05:18,799 INFO L78 Accepts]: Start accepts. Automaton has 7073 states and 10688 transitions. Word has length 122 [2019-10-13 23:05:18,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:05:18,800 INFO L462 AbstractCegarLoop]: Abstraction has 7073 states and 10688 transitions. [2019-10-13 23:05:18,800 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 23:05:18,800 INFO L276 IsEmpty]: Start isEmpty. Operand 7073 states and 10688 transitions. [2019-10-13 23:05:18,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-10-13 23:05:18,806 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:05:18,806 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:05:19,008 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:05:19,009 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:05:19,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:05:19,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1407780026, now seen corresponding path program 1 times [2019-10-13 23:05:19,010 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:05:19,011 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446443754] [2019-10-13 23:05:19,011 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:05:19,012 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:05:19,012 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:05:19,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:05:19,195 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-10-13 23:05:19,201 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446443754] [2019-10-13 23:05:19,202 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476471470] [2019-10-13 23:05:19,202 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:05:19,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:05:19,821 INFO L256 TraceCheckSpWp]: Trace formula consists of 3143 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-13 23:05:19,827 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:05:19,903 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-13 23:05:19,903 INFO L321 TraceCheckSpWp]: Computing backward predicates...