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_product01.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 23:04:19,282 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 23:04:19,285 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 23:04:19,298 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 23:04:19,298 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 23:04:19,299 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 23:04:19,301 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 23:04:19,303 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 23:04:19,304 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 23:04:19,305 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 23:04:19,306 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 23:04:19,307 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 23:04:19,307 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 23:04:19,308 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 23:04:19,309 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 23:04:19,310 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 23:04:19,311 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 23:04:19,312 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 23:04:19,314 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 23:04:19,315 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 23:04:19,317 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 23:04:19,318 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 23:04:19,319 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 23:04:19,320 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 23:04:19,322 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 23:04:19,322 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 23:04:19,322 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 23:04:19,323 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 23:04:19,324 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 23:04:19,325 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 23:04:19,326 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 23:04:19,326 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 23:04:19,328 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 23:04:19,329 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 23:04:19,330 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 23:04:19,332 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 23:04:19,333 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 23:04:19,333 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 23:04:19,333 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 23:04:19,334 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 23:04:19,335 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 23:04:19,336 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 23:04:19,359 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 23:04:19,359 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 23:04:19,361 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 23:04:19,361 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 23:04:19,361 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 23:04:19,362 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 23:04:19,362 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 23:04:19,362 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 23:04:19,362 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 23:04:19,362 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 23:04:19,363 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 23:04:19,364 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 23:04:19,364 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 23:04:19,364 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 23:04:19,364 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 23:04:19,365 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 23:04:19,365 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 23:04:19,365 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 23:04:19,365 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 23:04:19,365 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 23:04:19,366 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 23:04:19,366 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 23:04:19,366 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 23:04:19,367 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 23:04:19,367 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 23:04:19,367 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 23:04:19,367 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 23:04:19,367 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 23:04:19,368 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 23:04:19,659 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 23:04:19,679 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 23:04:19,684 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 23:04:19,685 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 23:04:19,685 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 23:04:19,686 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec3_product01.cil.c [2019-10-13 23:04:19,749 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36a24b067/c3333fff306042649fe5af05e37101d3/FLAGda77bd5d0 [2019-10-13 23:04:20,304 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 23:04:20,307 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec3_product01.cil.c [2019-10-13 23:04:20,346 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36a24b067/c3333fff306042649fe5af05e37101d3/FLAGda77bd5d0 [2019-10-13 23:04:20,570 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36a24b067/c3333fff306042649fe5af05e37101d3 [2019-10-13 23:04:20,580 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 23:04:20,582 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 23:04:20,586 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 23:04:20,586 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 23:04:20,589 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 23:04:20,590 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:04:20" (1/1) ... [2019-10-13 23:04:20,593 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74752006 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:04:20, skipping insertion in model container [2019-10-13 23:04:20,594 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:04:20" (1/1) ... [2019-10-13 23:04:20,602 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 23:04:20,690 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 23:04:21,316 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 23:04:21,342 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 23:04:21,505 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 23:04:21,588 INFO L192 MainTranslator]: Completed translation [2019-10-13 23:04:21,589 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:04:21 WrapperNode [2019-10-13 23:04:21,590 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 23:04:21,591 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 23:04:21,591 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 23:04:21,591 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 23:04:21,610 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:04:21" (1/1) ... [2019-10-13 23:04:21,611 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:04:21" (1/1) ... [2019-10-13 23:04:21,680 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:04:21" (1/1) ... [2019-10-13 23:04:21,680 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:04:21" (1/1) ... [2019-10-13 23:04:21,747 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:04:21" (1/1) ... [2019-10-13 23:04:21,786 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:04:21" (1/1) ... [2019-10-13 23:04:21,803 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:04:21" (1/1) ... [2019-10-13 23:04:21,826 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 23:04:21,827 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 23:04:21,828 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 23:04:21,828 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 23:04:21,829 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:04:21" (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 23:04:21,905 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 23:04:21,906 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 23:04:21,906 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-13 23:04:21,906 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-10-13 23:04:21,907 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-10-13 23:04:21,908 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-10-13 23:04:21,908 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-10-13 23:04:21,908 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-10-13 23:04:21,909 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-10-13 23:04:21,909 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-10-13 23:04:21,909 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-10-13 23:04:21,910 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-13 23:04:21,910 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-10-13 23:04:21,910 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-10-13 23:04:21,910 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-10-13 23:04:21,911 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-13 23:04:21,911 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-10-13 23:04:21,911 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-13 23:04:21,911 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-13 23:04:21,911 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 23:04:21,912 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-10-13 23:04:21,912 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-10-13 23:04:21,912 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-10-13 23:04:21,912 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-10-13 23:04:21,913 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-10-13 23:04:21,913 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-10-13 23:04:21,913 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-10-13 23:04:21,913 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-10-13 23:04:21,914 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-10-13 23:04:21,914 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-10-13 23:04:21,914 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-10-13 23:04:21,915 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-10-13 23:04:21,917 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-10-13 23:04:21,917 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification3_spec__1 [2019-10-13 23:04:21,917 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification3_spec__2 [2019-10-13 23:04:21,918 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-13 23:04:21,918 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-13 23:04:21,918 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-13 23:04:21,918 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-13 23:04:21,918 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-13 23:04:21,918 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-13 23:04:21,918 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-13 23:04:21,919 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-13 23:04:21,919 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-13 23:04:21,919 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-13 23:04:21,919 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-13 23:04:21,919 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-13 23:04:21,919 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-10-13 23:04:21,919 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-10-13 23:04:21,920 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-10-13 23:04:21,920 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-10-13 23:04:21,920 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-10-13 23:04:21,920 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-10-13 23:04:21,920 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-10-13 23:04:21,920 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-10-13 23:04:21,920 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-10-13 23:04:21,921 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-10-13 23:04:21,921 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-10-13 23:04:21,921 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-10-13 23:04:21,921 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-10-13 23:04:21,921 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-10-13 23:04:21,921 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-10-13 23:04:21,922 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-10-13 23:04:21,922 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-10-13 23:04:21,922 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-10-13 23:04:21,922 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-10-13 23:04:21,922 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-10-13 23:04:21,922 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-13 23:04:21,922 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-10-13 23:04:21,923 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-10-13 23:04:21,923 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 23:04:21,923 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 23:04:21,923 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 23:04:21,923 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-10-13 23:04:21,924 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-10-13 23:04:21,924 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-10-13 23:04:21,924 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-10-13 23:04:21,924 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-10-13 23:04:21,924 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-10-13 23:04:21,924 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-10-13 23:04:21,925 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-10-13 23:04:21,925 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-10-13 23:04:21,925 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-13 23:04:21,925 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-10-13 23:04:21,925 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-10-13 23:04:21,925 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-10-13 23:04:21,926 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-13 23:04:21,926 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-10-13 23:04:21,926 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-10-13 23:04:21,926 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-10-13 23:04:21,926 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-10-13 23:04:21,926 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-10-13 23:04:21,927 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-13 23:04:21,927 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-10-13 23:04:21,927 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-13 23:04:21,927 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-13 23:04:21,927 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-13 23:04:21,927 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-13 23:04:21,928 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-13 23:04:21,928 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-13 23:04:21,928 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 23:04:21,928 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-10-13 23:04:21,928 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-10-13 23:04:21,928 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-10-13 23:04:21,929 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-10-13 23:04:21,929 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-10-13 23:04:21,929 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-10-13 23:04:21,929 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-10-13 23:04:21,929 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-10-13 23:04:21,929 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-10-13 23:04:21,930 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-10-13 23:04:21,930 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-10-13 23:04:21,930 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-10-13 23:04:21,930 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-13 23:04:21,930 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-10-13 23:04:21,930 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-10-13 23:04:21,931 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-10-13 23:04:21,931 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification3_spec__1 [2019-10-13 23:04:21,931 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification3_spec__2 [2019-10-13 23:04:21,931 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-13 23:04:21,931 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-13 23:04:21,932 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-13 23:04:21,932 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-13 23:04:21,932 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-13 23:04:21,932 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-13 23:04:21,932 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 23:04:21,933 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-13 23:04:21,933 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-13 23:04:21,933 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 23:04:21,933 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-13 23:04:21,933 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-13 23:04:21,933 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 23:04:21,934 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-13 23:04:21,934 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-13 23:04:21,934 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 23:04:21,934 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-13 23:04:21,934 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-13 23:04:21,935 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-13 23:04:21,935 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-10-13 23:04:21,935 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-10-13 23:04:21,935 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-10-13 23:04:21,935 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-10-13 23:04:21,936 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-10-13 23:04:21,937 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-10-13 23:04:21,937 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-10-13 23:04:21,938 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-10-13 23:04:21,938 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-10-13 23:04:21,938 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-10-13 23:04:21,938 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-10-13 23:04:21,938 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-10-13 23:04:21,938 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-10-13 23:04:21,939 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-10-13 23:04:21,939 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 23:04:21,939 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-13 23:04:21,939 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 23:04:26,197 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 23:04:26,198 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-13 23:04:26,199 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:04:26 BoogieIcfgContainer [2019-10-13 23:04:26,200 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 23:04:26,201 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 23:04:26,201 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 23:04:26,204 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 23:04:26,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:04:20" (1/3) ... [2019-10-13 23:04:26,205 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a8664b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:04:26, skipping insertion in model container [2019-10-13 23:04:26,205 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:04:21" (2/3) ... [2019-10-13 23:04:26,206 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a8664b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:04:26, skipping insertion in model container [2019-10-13 23:04:26,206 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:04:26" (3/3) ... [2019-10-13 23:04:26,208 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product01.cil.c [2019-10-13 23:04:26,217 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 23:04:26,226 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 23:04:26,237 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 23:04:26,266 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 23:04:26,267 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 23:04:26,267 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 23:04:26,267 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 23:04:26,267 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 23:04:26,267 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 23:04:26,267 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 23:04:26,268 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 23:04:26,297 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states. [2019-10-13 23:04:26,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-10-13 23:04:26,312 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:04:26,313 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:04:26,315 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:04:26,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:04:26,321 INFO L82 PathProgramCache]: Analyzing trace with hash 2102671491, now seen corresponding path program 1 times [2019-10-13 23:04:26,330 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:04:26,331 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437105431] [2019-10-13 23:04:26,331 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:04:26,331 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:04:26,331 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:04:26,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:04:27,025 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 23:04:27,026 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437105431] [2019-10-13 23:04:27,027 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:04:27,027 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-13 23:04:27,028 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895984762] [2019-10-13 23:04:27,033 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 23:04:27,033 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:04:27,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 23:04:27,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-10-13 23:04:27,050 INFO L87 Difference]: Start difference. First operand 554 states. Second operand 8 states. [2019-10-13 23:04:27,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:04:27,255 INFO L93 Difference]: Finished difference Result 841 states and 1303 transitions. [2019-10-13 23:04:27,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 23:04:27,261 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 99 [2019-10-13 23:04:27,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:04:27,294 INFO L225 Difference]: With dead ends: 841 [2019-10-13 23:04:27,295 INFO L226 Difference]: Without dead ends: 429 [2019-10-13 23:04:27,309 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-10-13 23:04:27,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2019-10-13 23:04:27,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 426. [2019-10-13 23:04:27,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 426 states. [2019-10-13 23:04:27,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 645 transitions. [2019-10-13 23:04:27,414 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 645 transitions. Word has length 99 [2019-10-13 23:04:27,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:04:27,415 INFO L462 AbstractCegarLoop]: Abstraction has 426 states and 645 transitions. [2019-10-13 23:04:27,415 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 23:04:27,415 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 645 transitions. [2019-10-13 23:04:27,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-10-13 23:04:27,422 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:04:27,423 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:04:27,423 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:04:27,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:04:27,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1636883222, now seen corresponding path program 1 times [2019-10-13 23:04:27,424 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:04:27,424 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300980670] [2019-10-13 23:04:27,424 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:04:27,425 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:04:27,425 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:04:27,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:04:27,788 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 23:04:27,789 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300980670] [2019-10-13 23:04:27,789 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239498258] [2019-10-13 23:04:27,789 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 23:04:28,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:04:28,430 INFO L256 TraceCheckSpWp]: Trace formula consists of 2933 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 23:04:28,450 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:04:28,526 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 23:04:28,526 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:04:28,670 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 23:04:28,671 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 23:04:28,671 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [7] total 10 [2019-10-13 23:04:28,671 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750714469] [2019-10-13 23:04:28,674 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 23:04:28,674 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:04:28,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 23:04:28,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-10-13 23:04:28,675 INFO L87 Difference]: Start difference. First operand 426 states and 645 transitions. Second operand 5 states. [2019-10-13 23:04:30,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:04:30,180 INFO L93 Difference]: Finished difference Result 1566 states and 2425 transitions. [2019-10-13 23:04:30,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 23:04:30,181 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 103 [2019-10-13 23:04:30,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:04:30,192 INFO L225 Difference]: With dead ends: 1566 [2019-10-13 23:04:30,192 INFO L226 Difference]: Without dead ends: 1171 [2019-10-13 23:04:30,197 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 205 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 23:04:30,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1171 states. [2019-10-13 23:04:30,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1171 to 1159. [2019-10-13 23:04:30,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1159 states. [2019-10-13 23:04:30,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1159 states to 1159 states and 1743 transitions. [2019-10-13 23:04:30,423 INFO L78 Accepts]: Start accepts. Automaton has 1159 states and 1743 transitions. Word has length 103 [2019-10-13 23:04:30,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:04:30,426 INFO L462 AbstractCegarLoop]: Abstraction has 1159 states and 1743 transitions. [2019-10-13 23:04:30,426 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 23:04:30,426 INFO L276 IsEmpty]: Start isEmpty. Operand 1159 states and 1743 transitions. [2019-10-13 23:04:30,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-10-13 23:04:30,432 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:04:30,432 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 23:04:30,649 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:04:30,650 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:04:30,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:04:30,650 INFO L82 PathProgramCache]: Analyzing trace with hash 27946490, now seen corresponding path program 1 times [2019-10-13 23:04:30,650 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:04:30,651 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457066094] [2019-10-13 23:04:30,651 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:04:30,651 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:04:30,651 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:04:30,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:04:30,880 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 23:04:30,881 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457066094] [2019-10-13 23:04:30,881 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975489464] [2019-10-13 23:04:30,881 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 23:04:31,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:04:31,391 INFO L256 TraceCheckSpWp]: Trace formula consists of 2949 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-13 23:04:31,401 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:04:31,461 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 23:04:31,461 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:04:31,523 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:04:31,672 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 23:04:31,672 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 23:04:31,673 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [7] total 12 [2019-10-13 23:04:31,673 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145358074] [2019-10-13 23:04:31,674 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 23:04:31,674 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:04:31,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 23:04:31,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2019-10-13 23:04:31,675 INFO L87 Difference]: Start difference. First operand 1159 states and 1743 transitions. Second operand 7 states. [2019-10-13 23:04:32,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:04:32,385 INFO L93 Difference]: Finished difference Result 2127 states and 3217 transitions. [2019-10-13 23:04:32,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 23:04:32,386 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 107 [2019-10-13 23:04:32,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:04:32,396 INFO L225 Difference]: With dead ends: 2127 [2019-10-13 23:04:32,396 INFO L226 Difference]: Without dead ends: 1282 [2019-10-13 23:04:32,400 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 23:04:32,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1282 states. [2019-10-13 23:04:32,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1282 to 1231. [2019-10-13 23:04:32,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1231 states. [2019-10-13 23:04:32,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1231 states to 1231 states and 1843 transitions. [2019-10-13 23:04:32,465 INFO L78 Accepts]: Start accepts. Automaton has 1231 states and 1843 transitions. Word has length 107 [2019-10-13 23:04:32,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:04:32,466 INFO L462 AbstractCegarLoop]: Abstraction has 1231 states and 1843 transitions. [2019-10-13 23:04:32,466 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 23:04:32,466 INFO L276 IsEmpty]: Start isEmpty. Operand 1231 states and 1843 transitions. [2019-10-13 23:04:32,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-10-13 23:04:32,468 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:04:32,468 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 23:04:32,680 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:04:32,682 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:04:32,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:04:32,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1106744652, now seen corresponding path program 1 times [2019-10-13 23:04:32,683 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:04:32,684 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224749119] [2019-10-13 23:04:32,684 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:04:32,684 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:04:32,684 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:04:32,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:04:32,848 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 23:04:32,848 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224749119] [2019-10-13 23:04:32,849 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199852641] [2019-10-13 23:04:32,849 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 23:04:33,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:04:33,402 INFO L256 TraceCheckSpWp]: Trace formula consists of 2938 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 23:04:33,408 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:04:33,438 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 23:04:33,439 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:04:33,552 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 23:04:33,552 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 23:04:33,553 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [7] total 10 [2019-10-13 23:04:33,553 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572591419] [2019-10-13 23:04:33,553 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 23:04:33,554 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:04:33,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 23:04:33,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-10-13 23:04:33,554 INFO L87 Difference]: Start difference. First operand 1231 states and 1843 transitions. Second operand 5 states. [2019-10-13 23:04:33,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:04:33,739 INFO L93 Difference]: Finished difference Result 2296 states and 3493 transitions. [2019-10-13 23:04:33,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 23:04:33,740 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 108 [2019-10-13 23:04:33,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:04:33,750 INFO L225 Difference]: With dead ends: 2296 [2019-10-13 23:04:33,750 INFO L226 Difference]: Without dead ends: 1231 [2019-10-13 23:04:33,758 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 23:04:33,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1231 states. [2019-10-13 23:04:33,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1231 to 1231. [2019-10-13 23:04:33,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1231 states. [2019-10-13 23:04:33,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1231 states to 1231 states and 1822 transitions. [2019-10-13 23:04:33,829 INFO L78 Accepts]: Start accepts. Automaton has 1231 states and 1822 transitions. Word has length 108 [2019-10-13 23:04:33,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:04:33,830 INFO L462 AbstractCegarLoop]: Abstraction has 1231 states and 1822 transitions. [2019-10-13 23:04:33,830 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 23:04:33,830 INFO L276 IsEmpty]: Start isEmpty. Operand 1231 states and 1822 transitions. [2019-10-13 23:04:33,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-10-13 23:04:33,833 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:04:33,833 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 23:04:34,042 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:04:34,043 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:04:34,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:04:34,043 INFO L82 PathProgramCache]: Analyzing trace with hash -2082142587, now seen corresponding path program 1 times [2019-10-13 23:04:34,045 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:04:34,045 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36987741] [2019-10-13 23:04:34,045 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:04:34,045 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:04:34,045 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:04:34,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:04:34,224 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 23:04:34,224 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36987741] [2019-10-13 23:04:34,224 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139348530] [2019-10-13 23:04:34,225 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 23:04:34,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:04:34,786 INFO L256 TraceCheckSpWp]: Trace formula consists of 2948 conjuncts, 34 conjunts are in the unsatisfiable core [2019-10-13 23:04:34,794 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:04:34,851 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:04:34,984 WARN L191 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2019-10-13 23:04:34,986 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:04:35,061 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 23:04:35,061 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:04:35,225 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:04:35,376 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:04:35,379 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:04:35,444 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 23:04:35,444 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 23:04:35,445 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [7, 10] total 23 [2019-10-13 23:04:35,445 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37387835] [2019-10-13 23:04:35,446 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-13 23:04:35,446 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:04:35,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-13 23:04:35,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2019-10-13 23:04:35,447 INFO L87 Difference]: Start difference. First operand 1231 states and 1822 transitions. Second operand 10 states. [2019-10-13 23:04:39,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:04:39,944 INFO L93 Difference]: Finished difference Result 2151 states and 3213 transitions. [2019-10-13 23:04:39,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-13 23:04:39,945 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 110 [2019-10-13 23:04:39,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:04:39,972 INFO L225 Difference]: With dead ends: 2151 [2019-10-13 23:04:39,973 INFO L226 Difference]: Without dead ends: 2148 [2019-10-13 23:04:39,975 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 23:04:39,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2148 states. [2019-10-13 23:04:40,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2148 to 2077. [2019-10-13 23:04:40,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2077 states. [2019-10-13 23:04:40,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2077 states to 2077 states and 3108 transitions. [2019-10-13 23:04:40,129 INFO L78 Accepts]: Start accepts. Automaton has 2077 states and 3108 transitions. Word has length 110 [2019-10-13 23:04:40,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:04:40,130 INFO L462 AbstractCegarLoop]: Abstraction has 2077 states and 3108 transitions. [2019-10-13 23:04:40,130 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-13 23:04:40,130 INFO L276 IsEmpty]: Start isEmpty. Operand 2077 states and 3108 transitions. [2019-10-13 23:04:40,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-10-13 23:04:40,135 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:04:40,135 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 23:04:40,337 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:04:40,338 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:04:40,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:04:40,338 INFO L82 PathProgramCache]: Analyzing trace with hash -662345039, now seen corresponding path program 1 times [2019-10-13 23:04:40,338 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:04:40,338 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404210105] [2019-10-13 23:04:40,339 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:04:40,339 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:04:40,339 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:04:40,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:04:40,486 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 23:04:40,486 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404210105] [2019-10-13 23:04:40,487 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684879476] [2019-10-13 23:04:40,487 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 23:04:41,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:04:41,042 INFO L256 TraceCheckSpWp]: Trace formula consists of 2949 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 23:04:41,046 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:04:41,083 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 23:04:41,083 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:04:41,174 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 23:04:41,175 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 23:04:41,175 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 8 [2019-10-13 23:04:41,175 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212306562] [2019-10-13 23:04:41,176 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 23:04:41,177 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:04:41,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 23:04:41,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-10-13 23:04:41,177 INFO L87 Difference]: Start difference. First operand 2077 states and 3108 transitions. Second operand 3 states. [2019-10-13 23:04:41,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:04:41,412 INFO L93 Difference]: Finished difference Result 5912 states and 9145 transitions. [2019-10-13 23:04:41,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 23:04:41,413 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 111 [2019-10-13 23:04:41,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:04:41,448 INFO L225 Difference]: With dead ends: 5912 [2019-10-13 23:04:41,449 INFO L226 Difference]: Without dead ends: 3866 [2019-10-13 23:04:41,464 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 23:04:41,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3866 states. [2019-10-13 23:04:41,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3866 to 3743. [2019-10-13 23:04:41,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3743 states. [2019-10-13 23:04:41,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3743 states to 3743 states and 5637 transitions. [2019-10-13 23:04:41,682 INFO L78 Accepts]: Start accepts. Automaton has 3743 states and 5637 transitions. Word has length 111 [2019-10-13 23:04:41,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:04:41,684 INFO L462 AbstractCegarLoop]: Abstraction has 3743 states and 5637 transitions. [2019-10-13 23:04:41,684 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 23:04:41,684 INFO L276 IsEmpty]: Start isEmpty. Operand 3743 states and 5637 transitions. [2019-10-13 23:04:41,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-10-13 23:04:41,687 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:04:41,688 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 23:04:41,895 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:04:41,896 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:04:41,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:04:41,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1717081084, now seen corresponding path program 1 times [2019-10-13 23:04:41,897 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:04:41,897 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789465313] [2019-10-13 23:04:41,897 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:04:41,897 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:04:41,897 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:04:42,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:04:42,169 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 23:04:42,169 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789465313] [2019-10-13 23:04:42,170 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:04:42,170 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-13 23:04:42,170 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858549476] [2019-10-13 23:04:42,171 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 23:04:42,171 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:04:42,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 23:04:42,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-13 23:04:42,172 INFO L87 Difference]: Start difference. First operand 3743 states and 5637 transitions. Second operand 8 states. [2019-10-13 23:04:45,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:04:45,128 INFO L93 Difference]: Finished difference Result 10044 states and 15259 transitions. [2019-10-13 23:04:45,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 23:04:45,129 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 110 [2019-10-13 23:04:45,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:04:45,183 INFO L225 Difference]: With dead ends: 10044 [2019-10-13 23:04:45,184 INFO L226 Difference]: Without dead ends: 6332 [2019-10-13 23:04:45,209 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2019-10-13 23:04:45,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6332 states. [2019-10-13 23:04:45,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6332 to 6317. [2019-10-13 23:04:45,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6317 states. [2019-10-13 23:04:45,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6317 states to 6317 states and 9599 transitions. [2019-10-13 23:04:45,680 INFO L78 Accepts]: Start accepts. Automaton has 6317 states and 9599 transitions. Word has length 110 [2019-10-13 23:04:45,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:04:45,682 INFO L462 AbstractCegarLoop]: Abstraction has 6317 states and 9599 transitions. [2019-10-13 23:04:45,682 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 23:04:45,682 INFO L276 IsEmpty]: Start isEmpty. Operand 6317 states and 9599 transitions. [2019-10-13 23:04:45,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-10-13 23:04:45,685 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:04:45,685 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 23:04:45,685 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:04:45,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:04:45,685 INFO L82 PathProgramCache]: Analyzing trace with hash -822865660, now seen corresponding path program 1 times [2019-10-13 23:04:45,686 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:04:45,686 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44797508] [2019-10-13 23:04:45,686 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:04:45,686 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:04:45,686 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:04:45,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:04:45,875 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 23:04:45,876 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44797508] [2019-10-13 23:04:45,876 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61565801] [2019-10-13 23:04:45,876 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 23:04:46,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:04:46,480 INFO L256 TraceCheckSpWp]: Trace formula consists of 2938 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-13 23:04:46,486 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:04:46,515 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 23:04:46,516 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:04:46,602 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 23:04:46,603 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 23:04:46,603 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [11] total 12 [2019-10-13 23:04:46,603 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335122252] [2019-10-13 23:04:46,605 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 23:04:46,605 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:04:46,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 23:04:46,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-10-13 23:04:46,607 INFO L87 Difference]: Start difference. First operand 6317 states and 9599 transitions. Second operand 3 states. [2019-10-13 23:04:46,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:04:46,876 INFO L93 Difference]: Finished difference Result 14365 states and 22296 transitions. [2019-10-13 23:04:46,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 23:04:46,877 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 110 [2019-10-13 23:04:46,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:04:46,938 INFO L225 Difference]: With dead ends: 14365 [2019-10-13 23:04:46,938 INFO L226 Difference]: Without dead ends: 8079 [2019-10-13 23:04:46,978 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 23:04:46,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8079 states. [2019-10-13 23:04:47,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8079 to 7863. [2019-10-13 23:04:47,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7863 states. [2019-10-13 23:04:47,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7863 states to 7863 states and 11953 transitions. [2019-10-13 23:04:47,483 INFO L78 Accepts]: Start accepts. Automaton has 7863 states and 11953 transitions. Word has length 110 [2019-10-13 23:04:47,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:04:47,484 INFO L462 AbstractCegarLoop]: Abstraction has 7863 states and 11953 transitions. [2019-10-13 23:04:47,484 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 23:04:47,484 INFO L276 IsEmpty]: Start isEmpty. Operand 7863 states and 11953 transitions. [2019-10-13 23:04:47,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-10-13 23:04:47,488 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:04:47,488 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 23:04:47,695 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:04:47,696 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:04:47,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:04:47,697 INFO L82 PathProgramCache]: Analyzing trace with hash -943739269, now seen corresponding path program 1 times [2019-10-13 23:04:47,697 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:04:47,697 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532352877] [2019-10-13 23:04:47,698 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:04:47,698 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:04:47,698 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:04:47,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:04:47,836 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 23:04:47,836 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532352877] [2019-10-13 23:04:47,837 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526119136] [2019-10-13 23:04:47,837 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 23:04:48,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:04:48,372 INFO L256 TraceCheckSpWp]: Trace formula consists of 3020 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 23:04:48,386 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:04:48,427 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-13 23:04:48,428 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:04:48,552 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 23:04:48,553 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 23:04:48,553 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 5] total 10 [2019-10-13 23:04:48,553 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592034170] [2019-10-13 23:04:48,556 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 23:04:48,556 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:04:48,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 23:04:48,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2019-10-13 23:04:48,557 INFO L87 Difference]: Start difference. First operand 7863 states and 11953 transitions. Second operand 5 states. [2019-10-13 23:04:48,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:04:48,994 INFO L93 Difference]: Finished difference Result 15353 states and 23848 transitions. [2019-10-13 23:04:48,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 23:04:48,995 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 130 [2019-10-13 23:04:48,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:04:49,098 INFO L225 Difference]: With dead ends: 15353 [2019-10-13 23:04:49,098 INFO L226 Difference]: Without dead ends: 8012 [2019-10-13 23:04:50,024 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 257 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2019-10-13 23:04:50,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8012 states. [2019-10-13 23:04:50,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8012 to 7972. [2019-10-13 23:04:50,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7972 states. [2019-10-13 23:04:50,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7972 states to 7972 states and 12274 transitions. [2019-10-13 23:04:50,412 INFO L78 Accepts]: Start accepts. Automaton has 7972 states and 12274 transitions. Word has length 130 [2019-10-13 23:04:50,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:04:50,412 INFO L462 AbstractCegarLoop]: Abstraction has 7972 states and 12274 transitions. [2019-10-13 23:04:50,412 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 23:04:50,413 INFO L276 IsEmpty]: Start isEmpty. Operand 7972 states and 12274 transitions. [2019-10-13 23:04:50,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-10-13 23:04:50,419 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:04:50,420 INFO L380 BasicCegarLoop]: trace histogram [5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:04:50,627 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:04:50,628 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:04:50,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:04:50,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1520733588, now seen corresponding path program 1 times [2019-10-13 23:04:50,629 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:04:50,629 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882181834] [2019-10-13 23:04:50,630 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:04:50,630 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:04:50,630 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:04:50,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:04:50,773 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2019-10-13 23:04:50,774 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882181834] [2019-10-13 23:04:50,774 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967610874] [2019-10-13 23:04:50,774 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 23:04:51,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:04:51,329 INFO L256 TraceCheckSpWp]: Trace formula consists of 3082 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 23:04:51,344 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:04:51,377 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-13 23:04:51,377 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:04:51,540 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-10-13 23:04:51,540 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 23:04:51,540 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 4] total 10 [2019-10-13 23:04:51,541 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43986109] [2019-10-13 23:04:51,542 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 23:04:51,542 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:04:51,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 23:04:51,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-10-13 23:04:51,543 INFO L87 Difference]: Start difference. First operand 7972 states and 12274 transitions. Second operand 4 states. [2019-10-13 23:04:51,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:04:51,979 INFO L93 Difference]: Finished difference Result 16326 states and 25699 transitions. [2019-10-13 23:04:51,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 23:04:51,979 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 161 [2019-10-13 23:04:51,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted.