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 --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/product-lines/elevator_spec1_product24.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 21:09:51,195 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 21:09:51,198 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 21:09:51,217 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 21:09:51,217 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 21:09:51,219 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 21:09:51,221 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 21:09:51,230 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 21:09:51,234 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 21:09:51,239 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 21:09:51,240 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 21:09:51,241 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 21:09:51,242 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 21:09:51,243 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 21:09:51,246 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 21:09:51,247 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 21:09:51,249 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 21:09:51,249 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 21:09:51,251 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 21:09:51,254 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 21:09:51,255 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 21:09:51,256 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 21:09:51,258 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 21:09:51,258 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 21:09:51,260 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 21:09:51,261 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 21:09:51,261 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 21:09:51,262 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 21:09:51,262 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 21:09:51,263 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 21:09:51,263 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 21:09:51,264 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 21:09:51,265 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 21:09:51,266 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 21:09:51,267 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 21:09:51,267 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 21:09:51,268 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 21:09:51,268 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 21:09:51,268 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 21:09:51,269 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 21:09:51,270 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 21:09:51,270 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 21:09:51,284 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 21:09:51,285 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 21:09:51,286 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 21:09:51,286 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 21:09:51,286 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 21:09:51,287 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 21:09:51,287 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 21:09:51,287 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 21:09:51,287 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 21:09:51,287 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 21:09:51,288 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 21:09:51,288 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 21:09:51,288 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 21:09:51,288 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 21:09:51,288 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 21:09:51,289 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 21:09:51,289 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 21:09:51,289 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 21:09:51,289 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 21:09:51,289 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 21:09:51,290 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 21:09:51,290 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:09:51,290 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 21:09:51,290 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 21:09:51,290 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 21:09:51,291 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 21:09:51,291 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 21:09:51,291 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 21:09:51,291 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-13 21:09:51,568 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 21:09:51,585 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 21:09:51,589 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 21:09:51,591 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 21:09:51,591 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 21:09:51,592 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec1_product24.cil.c [2019-10-13 21:09:51,669 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea763993c/6f6b96793ffa490fafa00adea544a36d/FLAG6c93dfb22 [2019-10-13 21:09:52,419 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 21:09:52,420 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec1_product24.cil.c [2019-10-13 21:09:52,455 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea763993c/6f6b96793ffa490fafa00adea544a36d/FLAG6c93dfb22 [2019-10-13 21:09:52,500 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea763993c/6f6b96793ffa490fafa00adea544a36d [2019-10-13 21:09:52,511 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 21:09:52,513 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 21:09:52,514 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 21:09:52,514 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 21:09:52,518 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 21:09:52,520 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:09:52" (1/1) ... [2019-10-13 21:09:52,523 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@599a6431 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:52, skipping insertion in model container [2019-10-13 21:09:52,523 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:09:52" (1/1) ... [2019-10-13 21:09:52,531 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 21:09:52,623 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 21:09:53,381 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:09:53,397 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 21:09:53,543 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:09:53,655 INFO L192 MainTranslator]: Completed translation [2019-10-13 21:09:53,656 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:53 WrapperNode [2019-10-13 21:09:53,656 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 21:09:53,657 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 21:09:53,657 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 21:09:53,658 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 21:09:53,675 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:53" (1/1) ... [2019-10-13 21:09:53,676 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:53" (1/1) ... [2019-10-13 21:09:53,752 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:53" (1/1) ... [2019-10-13 21:09:53,753 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:53" (1/1) ... [2019-10-13 21:09:53,828 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:53" (1/1) ... [2019-10-13 21:09:53,865 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:53" (1/1) ... [2019-10-13 21:09:53,886 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:53" (1/1) ... [2019-10-13 21:09:53,906 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 21:09:53,907 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 21:09:53,907 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 21:09:53,907 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 21:09:53,908 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:53" (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 21:09:53,978 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 21:09:53,979 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 21:09:53,979 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-13 21:09:53,979 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-13 21:09:53,979 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-13 21:09:53,980 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-13 21:09:53,980 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-13 21:09:53,980 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-13 21:09:53,980 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-13 21:09:53,980 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-13 21:09:53,981 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-10-13 21:09:53,981 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-10-13 21:09:53,981 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-10-13 21:09:53,981 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-10-13 21:09:53,982 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-10-13 21:09:53,982 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-10-13 21:09:53,982 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-10-13 21:09:53,982 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-10-13 21:09:53,983 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-13 21:09:53,983 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-10-13 21:09:53,983 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-10-13 21:09:53,984 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-10-13 21:09:53,984 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-13 21:09:53,984 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-10-13 21:09:53,985 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-13 21:09:53,985 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-13 21:09:53,985 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 21:09:53,985 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-10-13 21:09:53,986 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-10-13 21:09:53,986 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-10-13 21:09:53,986 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-10-13 21:09:53,986 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-10-13 21:09:53,986 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-10-13 21:09:53,986 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-10-13 21:09:53,987 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-10-13 21:09:53,987 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-10-13 21:09:53,987 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-10-13 21:09:53,987 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-10-13 21:09:53,988 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-10-13 21:09:53,988 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-10-13 21:09:53,988 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-10-13 21:09:53,988 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-10-13 21:09:53,988 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-10-13 21:09:53,988 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-10-13 21:09:53,989 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-10-13 21:09:53,989 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-10-13 21:09:53,989 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-10-13 21:09:53,990 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-10-13 21:09:53,990 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-10-13 21:09:53,990 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-10-13 21:09:53,990 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-10-13 21:09:53,990 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2019-10-13 21:09:53,990 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__twothirdsfull [2019-10-13 21:09:53,991 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-10-13 21:09:53,991 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-10-13 21:09:53,991 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-10-13 21:09:53,991 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__weight [2019-10-13 21:09:53,991 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2019-10-13 21:09:53,991 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-10-13 21:09:53,991 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-10-13 21:09:53,991 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-10-13 21:09:53,992 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2019-10-13 21:09:53,992 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-13 21:09:53,992 INFO L138 BoogieDeclarations]: Found implementation of procedure printState__wrappee__executivefloor [2019-10-13 21:09:53,992 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-10-13 21:09:53,992 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-10-13 21:09:53,992 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2019-10-13 21:09:53,993 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloor [2019-10-13 21:09:53,993 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-10-13 21:09:53,993 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-10-13 21:09:53,993 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2019-10-13 21:09:53,993 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__2 [2019-10-13 21:09:53,993 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__3 [2019-10-13 21:09:53,994 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__4 [2019-10-13 21:09:53,994 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-13 21:09:53,994 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-10-13 21:09:53,994 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-10-13 21:09:53,994 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-10-13 21:09:53,994 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-13 21:09:53,995 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-13 21:09:53,995 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-13 21:09:53,995 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-13 21:09:53,995 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 21:09:53,995 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 21:09:53,996 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-13 21:09:53,996 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-13 21:09:53,996 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-13 21:09:53,996 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-13 21:09:53,996 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-13 21:09:53,997 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-13 21:09:53,997 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 21:09:53,997 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-13 21:09:53,997 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-13 21:09:53,997 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 21:09:53,997 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-13 21:09:53,998 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-13 21:09:53,998 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 21:09:53,998 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-13 21:09:53,998 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-13 21:09:53,998 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 21:09:53,999 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-13 21:09:53,999 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-13 21:09:53,999 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 21:09:53,999 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-10-13 21:09:53,999 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-10-13 21:09:53,999 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-10-13 21:09:54,000 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-10-13 21:09:54,000 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-10-13 21:09:54,000 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-10-13 21:09:54,000 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-10-13 21:09:54,000 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-10-13 21:09:54,000 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-10-13 21:09:54,000 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-13 21:09:54,001 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-10-13 21:09:54,001 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-10-13 21:09:54,001 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-10-13 21:09:54,001 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-13 21:09:54,001 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-10-13 21:09:54,001 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-10-13 21:09:54,001 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-10-13 21:09:54,002 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-10-13 21:09:54,002 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-10-13 21:09:54,002 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-13 21:09:54,002 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-10-13 21:09:54,002 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-13 21:09:54,002 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2019-10-13 21:09:54,003 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__4 [2019-10-13 21:09:54,003 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-13 21:09:54,003 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-13 21:09:54,003 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-13 21:09:54,003 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-13 21:09:54,003 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-13 21:09:54,003 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 21:09:54,004 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-10-13 21:09:54,004 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-10-13 21:09:54,004 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-10-13 21:09:54,004 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-10-13 21:09:54,004 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-10-13 21:09:54,004 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-10-13 21:09:54,005 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-10-13 21:09:54,005 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__2 [2019-10-13 21:09:54,005 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-13 21:09:54,005 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-10-13 21:09:54,005 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-10-13 21:09:54,005 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-10-13 21:09:54,006 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-10-13 21:09:54,006 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-10-13 21:09:54,006 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-10-13 21:09:54,006 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-10-13 21:09:54,006 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-10-13 21:09:54,006 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-10-13 21:09:54,006 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2019-10-13 21:09:54,007 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloor [2019-10-13 21:09:54,007 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-10-13 21:09:54,007 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-10-13 21:09:54,007 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-10-13 21:09:54,007 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-10-13 21:09:54,007 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-10-13 21:09:54,007 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-10-13 21:09:54,008 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-10-13 21:09:54,008 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2019-10-13 21:09:54,008 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__twothirdsfull [2019-10-13 21:09:54,008 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-10-13 21:09:54,008 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-10-13 21:09:54,008 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__weight [2019-10-13 21:09:54,008 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2019-10-13 21:09:54,009 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-10-13 21:09:54,009 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-10-13 21:09:54,009 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-10-13 21:09:54,009 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2019-10-13 21:09:54,009 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__3 [2019-10-13 21:09:54,009 INFO L130 BoogieDeclarations]: Found specification of procedure printState__wrappee__executivefloor [2019-10-13 21:09:54,009 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-10-13 21:09:54,010 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-10-13 21:09:54,010 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-10-13 21:09:54,010 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-13 21:09:54,010 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 21:09:54,010 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-13 21:09:54,010 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 21:09:56,334 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 21:09:56,334 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-13 21:09:56,337 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:09:56 BoogieIcfgContainer [2019-10-13 21:09:56,337 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 21:09:56,340 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 21:09:56,340 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 21:09:56,344 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 21:09:56,344 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:09:52" (1/3) ... [2019-10-13 21:09:56,345 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74fb326e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:09:56, skipping insertion in model container [2019-10-13 21:09:56,345 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:53" (2/3) ... [2019-10-13 21:09:56,346 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74fb326e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:09:56, skipping insertion in model container [2019-10-13 21:09:56,346 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:09:56" (3/3) ... [2019-10-13 21:09:56,349 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product24.cil.c [2019-10-13 21:09:56,361 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 21:09:56,376 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 21:09:56,388 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 21:09:56,453 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 21:09:56,454 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 21:09:56,454 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 21:09:56,454 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 21:09:56,454 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 21:09:56,454 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 21:09:56,455 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 21:09:56,455 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 21:09:56,510 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states. [2019-10-13 21:09:56,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-10-13 21:09:56,539 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:56,541 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:56,544 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:56,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:56,551 INFO L82 PathProgramCache]: Analyzing trace with hash 2036682546, now seen corresponding path program 1 times [2019-10-13 21:09:56,562 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:56,562 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083035284] [2019-10-13 21:09:56,563 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:56,563 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:56,563 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:57,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:57,286 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:09:57,287 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083035284] [2019-10-13 21:09:57,288 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210101725] [2019-10-13 21:09:57,288 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 21:09:57,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:57,957 INFO L256 TraceCheckSpWp]: Trace formula consists of 3176 conjuncts, 1 conjunts are in the unsatisfiable core [2019-10-13 21:09:57,974 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:58,011 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:09:58,012 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:58,199 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:09:58,200 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:09:58,200 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [4] total 4 [2019-10-13 21:09:58,200 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536873981] [2019-10-13 21:09:58,206 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-13 21:09:58,208 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:58,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-13 21:09:58,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:09:58,225 INFO L87 Difference]: Start difference. First operand 818 states. Second operand 2 states. [2019-10-13 21:09:58,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:58,301 INFO L93 Difference]: Finished difference Result 694 states and 1094 transitions. [2019-10-13 21:09:58,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-13 21:09:58,302 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 116 [2019-10-13 21:09:58,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:58,343 INFO L225 Difference]: With dead ends: 694 [2019-10-13 21:09:58,344 INFO L226 Difference]: Without dead ends: 657 [2019-10-13 21:09:58,349 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:09:58,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2019-10-13 21:09:58,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 657. [2019-10-13 21:09:58,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 657 states. [2019-10-13 21:09:58,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 1039 transitions. [2019-10-13 21:09:58,495 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 1039 transitions. Word has length 116 [2019-10-13 21:09:58,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:58,497 INFO L462 AbstractCegarLoop]: Abstraction has 657 states and 1039 transitions. [2019-10-13 21:09:58,498 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-13 21:09:58,498 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 1039 transitions. [2019-10-13 21:09:58,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-10-13 21:09:58,502 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:58,503 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:58,710 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:58,711 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:58,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:58,712 INFO L82 PathProgramCache]: Analyzing trace with hash -778540699, now seen corresponding path program 1 times [2019-10-13 21:09:58,712 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:58,713 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943342093] [2019-10-13 21:09:58,714 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:58,714 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:58,714 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:58,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:58,991 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:09:58,992 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943342093] [2019-10-13 21:09:58,992 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559093115] [2019-10-13 21:09:58,992 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 21:09:59,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:59,555 INFO L256 TraceCheckSpWp]: Trace formula consists of 3179 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:09:59,565 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:59,617 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:09:59,625 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:59,907 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:09:59,908 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:59,908 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:09:59,908 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745862935] [2019-10-13 21:09:59,909 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:59,909 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:59,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:59,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:09:59,910 INFO L87 Difference]: Start difference. First operand 657 states and 1039 transitions. Second operand 4 states. [2019-10-13 21:10:00,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:00,032 INFO L93 Difference]: Finished difference Result 1286 states and 2051 transitions. [2019-10-13 21:10:00,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:10:00,033 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 118 [2019-10-13 21:10:00,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:00,042 INFO L225 Difference]: With dead ends: 1286 [2019-10-13 21:10:00,042 INFO L226 Difference]: Without dead ends: 657 [2019-10-13 21:10:00,051 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 232 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:10:00,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2019-10-13 21:10:00,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 657. [2019-10-13 21:10:00,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 657 states. [2019-10-13 21:10:00,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 1038 transitions. [2019-10-13 21:10:00,108 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 1038 transitions. Word has length 118 [2019-10-13 21:10:00,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:00,109 INFO L462 AbstractCegarLoop]: Abstraction has 657 states and 1038 transitions. [2019-10-13 21:10:00,109 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:00,109 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 1038 transitions. [2019-10-13 21:10:00,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-10-13 21:10:00,113 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:00,114 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:00,322 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:00,322 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:00,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:00,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1816210495, now seen corresponding path program 1 times [2019-10-13 21:10:00,323 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:00,323 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305660428] [2019-10-13 21:10:00,324 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:00,324 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:00,324 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:00,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:00,533 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:10:00,534 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305660428] [2019-10-13 21:10:00,534 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634695792] [2019-10-13 21:10:00,535 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 21:10:01,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:01,182 INFO L256 TraceCheckSpWp]: Trace formula consists of 3181 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:01,189 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:01,223 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:10:01,223 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:01,414 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:10:01,415 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:01,415 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:10:01,415 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062358921] [2019-10-13 21:10:01,418 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:01,418 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:01,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:01,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:10:01,419 INFO L87 Difference]: Start difference. First operand 657 states and 1038 transitions. Second operand 4 states. [2019-10-13 21:10:01,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:01,492 INFO L93 Difference]: Finished difference Result 1286 states and 2049 transitions. [2019-10-13 21:10:01,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:10:01,493 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 120 [2019-10-13 21:10:01,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:01,498 INFO L225 Difference]: With dead ends: 1286 [2019-10-13 21:10:01,498 INFO L226 Difference]: Without dead ends: 657 [2019-10-13 21:10:01,501 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 236 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:10:01,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2019-10-13 21:10:01,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 657. [2019-10-13 21:10:01,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 657 states. [2019-10-13 21:10:01,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 1037 transitions. [2019-10-13 21:10:01,533 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 1037 transitions. Word has length 120 [2019-10-13 21:10:01,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:01,534 INFO L462 AbstractCegarLoop]: Abstraction has 657 states and 1037 transitions. [2019-10-13 21:10:01,534 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:01,534 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 1037 transitions. [2019-10-13 21:10:01,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-10-13 21:10:01,536 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:01,536 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:01,743 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:01,744 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:01,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:01,745 INFO L82 PathProgramCache]: Analyzing trace with hash 920540717, now seen corresponding path program 1 times [2019-10-13 21:10:01,745 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:01,745 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949505388] [2019-10-13 21:10:01,746 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:01,746 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:01,746 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:01,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:01,865 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:10:01,865 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949505388] [2019-10-13 21:10:01,865 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790096489] [2019-10-13 21:10:01,866 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 21:10:02,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:02,493 INFO L256 TraceCheckSpWp]: Trace formula consists of 3183 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:02,499 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:02,533 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:10:02,533 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:02,733 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:10:02,734 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:02,734 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:10:02,734 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383597699] [2019-10-13 21:10:02,735 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:02,735 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:02,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:02,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:10:02,736 INFO L87 Difference]: Start difference. First operand 657 states and 1037 transitions. Second operand 4 states. [2019-10-13 21:10:02,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:02,815 INFO L93 Difference]: Finished difference Result 1293 states and 2056 transitions. [2019-10-13 21:10:02,815 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:10:02,817 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 122 [2019-10-13 21:10:02,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:02,825 INFO L225 Difference]: With dead ends: 1293 [2019-10-13 21:10:02,825 INFO L226 Difference]: Without dead ends: 666 [2019-10-13 21:10:02,831 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 240 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:10:02,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2019-10-13 21:10:02,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 666. [2019-10-13 21:10:02,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 666 states. [2019-10-13 21:10:02,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 1049 transitions. [2019-10-13 21:10:02,864 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 1049 transitions. Word has length 122 [2019-10-13 21:10:02,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:02,865 INFO L462 AbstractCegarLoop]: Abstraction has 666 states and 1049 transitions. [2019-10-13 21:10:02,865 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:02,865 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 1049 transitions. [2019-10-13 21:10:02,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-10-13 21:10:02,870 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:02,870 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:03,081 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:03,084 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:03,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:03,085 INFO L82 PathProgramCache]: Analyzing trace with hash 930906058, now seen corresponding path program 1 times [2019-10-13 21:10:03,085 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:03,086 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478360202] [2019-10-13 21:10:03,086 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:03,086 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:03,086 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:03,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:03,258 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:10:03,258 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478360202] [2019-10-13 21:10:03,258 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287126549] [2019-10-13 21:10:03,259 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 21:10:03,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:03,870 INFO L256 TraceCheckSpWp]: Trace formula consists of 3184 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:03,876 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:03,914 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:10:03,915 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:04,112 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:10:04,113 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:04,113 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:10:04,113 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319417042] [2019-10-13 21:10:04,114 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:04,114 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:04,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:04,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:10:04,115 INFO L87 Difference]: Start difference. First operand 666 states and 1049 transitions. Second operand 4 states. [2019-10-13 21:10:04,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:04,189 INFO L93 Difference]: Finished difference Result 1295 states and 2057 transitions. [2019-10-13 21:10:04,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:10:04,190 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 123 [2019-10-13 21:10:04,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:04,195 INFO L225 Difference]: With dead ends: 1295 [2019-10-13 21:10:04,195 INFO L226 Difference]: Without dead ends: 666 [2019-10-13 21:10:04,198 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 242 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:10:04,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2019-10-13 21:10:04,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 666. [2019-10-13 21:10:04,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 666 states. [2019-10-13 21:10:04,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 1048 transitions. [2019-10-13 21:10:04,222 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 1048 transitions. Word has length 123 [2019-10-13 21:10:04,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:04,223 INFO L462 AbstractCegarLoop]: Abstraction has 666 states and 1048 transitions. [2019-10-13 21:10:04,223 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:04,223 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 1048 transitions. [2019-10-13 21:10:04,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-10-13 21:10:04,225 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:04,225 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:04,433 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:04,434 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:04,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:04,434 INFO L82 PathProgramCache]: Analyzing trace with hash -289235503, now seen corresponding path program 1 times [2019-10-13 21:10:04,434 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:04,435 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079474092] [2019-10-13 21:10:04,435 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:04,435 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:04,435 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:04,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:04,549 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:10:04,549 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079474092] [2019-10-13 21:10:04,549 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547527246] [2019-10-13 21:10:04,549 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 21:10:05,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:05,214 INFO L256 TraceCheckSpWp]: Trace formula consists of 3185 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:05,225 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:05,269 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:10:05,269 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:05,450 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:10:05,451 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:05,451 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-13 21:10:05,451 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166400612] [2019-10-13 21:10:05,452 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:05,453 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:05,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:05,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:10:05,455 INFO L87 Difference]: Start difference. First operand 666 states and 1048 transitions. Second operand 4 states. [2019-10-13 21:10:05,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:05,536 INFO L93 Difference]: Finished difference Result 1295 states and 2056 transitions. [2019-10-13 21:10:05,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:10:05,536 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 124 [2019-10-13 21:10:05,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:05,543 INFO L225 Difference]: With dead ends: 1295 [2019-10-13 21:10:05,543 INFO L226 Difference]: Without dead ends: 666 [2019-10-13 21:10:05,549 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 244 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:10:05,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2019-10-13 21:10:05,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 666. [2019-10-13 21:10:05,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 666 states. [2019-10-13 21:10:05,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 1047 transitions. [2019-10-13 21:10:05,577 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 1047 transitions. Word has length 124 [2019-10-13 21:10:05,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:05,578 INFO L462 AbstractCegarLoop]: Abstraction has 666 states and 1047 transitions. [2019-10-13 21:10:05,578 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:05,578 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 1047 transitions. [2019-10-13 21:10:05,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-10-13 21:10:05,582 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:05,582 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:05,791 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:05,791 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:05,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:05,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1000385362, now seen corresponding path program 1 times [2019-10-13 21:10:05,792 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:05,792 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210256709] [2019-10-13 21:10:05,792 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:05,792 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:05,792 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:05,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:06,000 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:10:06,000 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210256709] [2019-10-13 21:10:06,000 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702233660] [2019-10-13 21:10:06,001 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 21:10:06,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:06,686 INFO L256 TraceCheckSpWp]: Trace formula consists of 3186 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:06,701 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:06,741 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:10:06,741 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:06,985 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:10:06,986 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:06,986 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-10-13 21:10:06,986 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597255724] [2019-10-13 21:10:06,987 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:06,987 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:06,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:06,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:10:06,989 INFO L87 Difference]: Start difference. First operand 666 states and 1047 transitions. Second operand 4 states. [2019-10-13 21:10:07,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:07,154 INFO L93 Difference]: Finished difference Result 1294 states and 2056 transitions. [2019-10-13 21:10:07,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:10:07,155 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 125 [2019-10-13 21:10:07,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:07,166 INFO L225 Difference]: With dead ends: 1294 [2019-10-13 21:10:07,166 INFO L226 Difference]: Without dead ends: 666 [2019-10-13 21:10:07,170 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 248 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-10-13 21:10:07,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2019-10-13 21:10:07,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 666. [2019-10-13 21:10:07,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 666 states. [2019-10-13 21:10:07,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 1042 transitions. [2019-10-13 21:10:07,195 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 1042 transitions. Word has length 125 [2019-10-13 21:10:07,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:07,195 INFO L462 AbstractCegarLoop]: Abstraction has 666 states and 1042 transitions. [2019-10-13 21:10:07,195 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:07,195 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 1042 transitions. [2019-10-13 21:10:07,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-10-13 21:10:07,197 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:07,197 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:07,413 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:07,413 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:07,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:07,414 INFO L82 PathProgramCache]: Analyzing trace with hash -494618178, now seen corresponding path program 1 times [2019-10-13 21:10:07,414 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:07,414 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411331933] [2019-10-13 21:10:07,414 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:07,414 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:07,414 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:07,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:07,566 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:10:07,566 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411331933] [2019-10-13 21:10:07,566 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658343462] [2019-10-13 21:10:07,567 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 21:10:08,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:08,192 INFO L256 TraceCheckSpWp]: Trace formula consists of 3188 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:08,196 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:08,281 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:10:08,283 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:08,479 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:10:08,479 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:08,479 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-10-13 21:10:08,480 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976286981] [2019-10-13 21:10:08,481 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:08,481 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:08,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:08,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:10:08,482 INFO L87 Difference]: Start difference. First operand 666 states and 1042 transitions. Second operand 4 states. [2019-10-13 21:10:08,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:08,666 INFO L93 Difference]: Finished difference Result 1294 states and 2046 transitions. [2019-10-13 21:10:08,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:10:08,667 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 127 [2019-10-13 21:10:08,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:08,672 INFO L225 Difference]: With dead ends: 1294 [2019-10-13 21:10:08,672 INFO L226 Difference]: Without dead ends: 666 [2019-10-13 21:10:08,675 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 252 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-10-13 21:10:08,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2019-10-13 21:10:08,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 666. [2019-10-13 21:10:08,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 666 states. [2019-10-13 21:10:08,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 1037 transitions. [2019-10-13 21:10:08,697 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 1037 transitions. Word has length 127 [2019-10-13 21:10:08,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:08,697 INFO L462 AbstractCegarLoop]: Abstraction has 666 states and 1037 transitions. [2019-10-13 21:10:08,697 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:08,698 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 1037 transitions. [2019-10-13 21:10:08,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-10-13 21:10:08,700 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:08,700 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:10:08,911 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:08,912 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:08,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:08,912 INFO L82 PathProgramCache]: Analyzing trace with hash -856773916, now seen corresponding path program 1 times [2019-10-13 21:10:08,912 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:08,912 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266905692] [2019-10-13 21:10:08,913 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:08,913 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:08,913 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:08,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:09,058 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:10:09,058 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266905692] [2019-10-13 21:10:09,059 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608580179] [2019-10-13 21:10:09,059 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:09,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:09,697 INFO L256 TraceCheckSpWp]: Trace formula consists of 3190 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:09,702 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:09,741 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:10:09,742 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:09,959 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:10:09,959 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:09,960 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-10-13 21:10:09,960 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566946583] [2019-10-13 21:10:09,961 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:09,961 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:09,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:09,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:10:09,962 INFO L87 Difference]: Start difference. First operand 666 states and 1037 transitions. Second operand 4 states. [2019-10-13 21:10:10,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:10,199 INFO L93 Difference]: Finished difference Result 1330 states and 2095 transitions. [2019-10-13 21:10:10,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:10:10,199 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 129 [2019-10-13 21:10:10,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:10,205 INFO L225 Difference]: With dead ends: 1330 [2019-10-13 21:10:10,205 INFO L226 Difference]: Without dead ends: 705 [2019-10-13 21:10:10,208 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 256 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-10-13 21:10:10,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2019-10-13 21:10:10,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 705. [2019-10-13 21:10:10,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 705 states. [2019-10-13 21:10:10,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 1101 transitions. [2019-10-13 21:10:10,234 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 1101 transitions. Word has length 129 [2019-10-13 21:10:10,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:10,234 INFO L462 AbstractCegarLoop]: Abstraction has 705 states and 1101 transitions. [2019-10-13 21:10:10,235 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:10,235 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 1101 transitions. [2019-10-13 21:10:10,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-10-13 21:10:10,237 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:10,237 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:10,453 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:10,454 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:10,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:10,454 INFO L82 PathProgramCache]: Analyzing trace with hash 165717697, now seen corresponding path program 1 times [2019-10-13 21:10:10,454 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:10,455 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418303838] [2019-10-13 21:10:10,455 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:10,455 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:10,455 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:10,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:10,674 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:10:10,675 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418303838] [2019-10-13 21:10:10,675 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930752174] [2019-10-13 21:10:10,675 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:11,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:11,417 INFO L256 TraceCheckSpWp]: Trace formula consists of 3191 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:11,422 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:11,466 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:10:11,466 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:11,679 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:10:11,680 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:11,680 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-10-13 21:10:11,680 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049162096] [2019-10-13 21:10:11,681 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:11,681 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:11,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:11,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:10:11,682 INFO L87 Difference]: Start difference. First operand 705 states and 1101 transitions. Second operand 4 states. [2019-10-13 21:10:11,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:11,922 INFO L93 Difference]: Finished difference Result 1333 states and 2098 transitions. [2019-10-13 21:10:11,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:10:11,923 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 130 [2019-10-13 21:10:11,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:11,928 INFO L225 Difference]: With dead ends: 1333 [2019-10-13 21:10:11,928 INFO L226 Difference]: Without dead ends: 705 [2019-10-13 21:10:11,931 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 258 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-10-13 21:10:11,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2019-10-13 21:10:11,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 705. [2019-10-13 21:10:11,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 705 states. [2019-10-13 21:10:11,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 1096 transitions. [2019-10-13 21:10:11,961 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 1096 transitions. Word has length 130 [2019-10-13 21:10:11,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:11,963 INFO L462 AbstractCegarLoop]: Abstraction has 705 states and 1096 transitions. [2019-10-13 21:10:11,963 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:11,963 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 1096 transitions. [2019-10-13 21:10:11,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-10-13 21:10:11,965 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:11,965 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:12,173 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:12,174 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:12,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:12,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1848911168, now seen corresponding path program 1 times [2019-10-13 21:10:12,175 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:12,175 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226201182] [2019-10-13 21:10:12,175 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:12,176 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:12,176 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:12,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:12,299 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:10:12,299 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226201182] [2019-10-13 21:10:12,300 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009687567] [2019-10-13 21:10:12,300 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:12,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:12,995 INFO L256 TraceCheckSpWp]: Trace formula consists of 3187 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 21:10:12,999 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:13,104 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:10:13,105 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:13,490 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:10:13,600 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 21:10:13,601 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:13,601 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 9] total 16 [2019-10-13 21:10:13,601 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223530248] [2019-10-13 21:10:13,602 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 21:10:13,602 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:13,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 21:10:13,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2019-10-13 21:10:13,603 INFO L87 Difference]: Start difference. First operand 705 states and 1096 transitions. Second operand 9 states. [2019-10-13 21:10:13,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:13,823 INFO L93 Difference]: Finished difference Result 1346 states and 2112 transitions. [2019-10-13 21:10:13,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 21:10:13,824 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 130 [2019-10-13 21:10:13,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:13,830 INFO L225 Difference]: With dead ends: 1346 [2019-10-13 21:10:13,830 INFO L226 Difference]: Without dead ends: 721 [2019-10-13 21:10:13,833 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 245 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2019-10-13 21:10:13,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2019-10-13 21:10:13,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 714. [2019-10-13 21:10:13,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 714 states. [2019-10-13 21:10:13,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 714 states to 714 states and 1109 transitions. [2019-10-13 21:10:13,858 INFO L78 Accepts]: Start accepts. Automaton has 714 states and 1109 transitions. Word has length 130 [2019-10-13 21:10:13,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:13,859 INFO L462 AbstractCegarLoop]: Abstraction has 714 states and 1109 transitions. [2019-10-13 21:10:13,859 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 21:10:13,859 INFO L276 IsEmpty]: Start isEmpty. Operand 714 states and 1109 transitions. [2019-10-13 21:10:13,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-10-13 21:10:13,861 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:13,861 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:14,078 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:14,078 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:14,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:14,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1039423711, now seen corresponding path program 1 times [2019-10-13 21:10:14,079 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:14,079 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645883107] [2019-10-13 21:10:14,079 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:14,080 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:14,080 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:14,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:14,227 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:10:14,227 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645883107] [2019-10-13 21:10:14,228 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705199776] [2019-10-13 21:10:14,228 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:14,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:14,902 INFO L256 TraceCheckSpWp]: Trace formula consists of 3186 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 21:10:14,906 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:14,965 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:10:14,965 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:15,262 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:10:15,326 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:10:15,327 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 13 [2019-10-13 21:10:15,327 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690764259] [2019-10-13 21:10:15,327 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 21:10:15,328 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:15,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 21:10:15,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2019-10-13 21:10:15,328 INFO L87 Difference]: Start difference. First operand 714 states and 1109 transitions. Second operand 11 states. [2019-10-13 21:10:15,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:15,462 INFO L93 Difference]: Finished difference Result 1284 states and 2014 transitions. [2019-10-13 21:10:15,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 21:10:15,462 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 130 [2019-10-13 21:10:15,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:15,467 INFO L225 Difference]: With dead ends: 1284 [2019-10-13 21:10:15,467 INFO L226 Difference]: Without dead ends: 731 [2019-10-13 21:10:15,471 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 251 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:10:15,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2019-10-13 21:10:15,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 721. [2019-10-13 21:10:15,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 721 states. [2019-10-13 21:10:15,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 1119 transitions. [2019-10-13 21:10:15,495 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 1119 transitions. Word has length 130 [2019-10-13 21:10:15,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:15,496 INFO L462 AbstractCegarLoop]: Abstraction has 721 states and 1119 transitions. [2019-10-13 21:10:15,496 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 21:10:15,496 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 1119 transitions. [2019-10-13 21:10:15,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-10-13 21:10:15,499 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:15,499 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:15,715 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:15,715 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:15,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:15,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1852331009, now seen corresponding path program 1 times [2019-10-13 21:10:15,716 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:15,716 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048290858] [2019-10-13 21:10:15,716 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:15,716 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:15,717 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:15,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:15,815 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:10:15,815 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048290858] [2019-10-13 21:10:15,815 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756429282] [2019-10-13 21:10:15,815 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:16,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:16,472 INFO L256 TraceCheckSpWp]: Trace formula consists of 3183 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 21:10:16,476 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:16,553 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 21:10:16,554 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:16,874 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:10:17,024 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 21:10:17,025 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:10:17,025 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [4] total 16 [2019-10-13 21:10:17,025 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001042816] [2019-10-13 21:10:17,027 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-13 21:10:17,027 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:17,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-13 21:10:17,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2019-10-13 21:10:17,028 INFO L87 Difference]: Start difference. First operand 721 states and 1119 transitions. Second operand 14 states. [2019-10-13 21:10:17,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:17,310 INFO L93 Difference]: Finished difference Result 1284 states and 2014 transitions. [2019-10-13 21:10:17,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 21:10:17,311 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 131 [2019-10-13 21:10:17,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:17,317 INFO L225 Difference]: With dead ends: 1284 [2019-10-13 21:10:17,317 INFO L226 Difference]: Without dead ends: 731 [2019-10-13 21:10:17,320 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 248 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2019-10-13 21:10:17,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2019-10-13 21:10:17,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 721. [2019-10-13 21:10:17,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 721 states. [2019-10-13 21:10:17,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 1119 transitions. [2019-10-13 21:10:17,354 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 1119 transitions. Word has length 131 [2019-10-13 21:10:17,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:17,354 INFO L462 AbstractCegarLoop]: Abstraction has 721 states and 1119 transitions. [2019-10-13 21:10:17,355 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-13 21:10:17,355 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 1119 transitions. [2019-10-13 21:10:17,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-10-13 21:10:17,357 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:17,357 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:17,568 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:17,569 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:17,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:17,569 INFO L82 PathProgramCache]: Analyzing trace with hash 741733821, now seen corresponding path program 1 times [2019-10-13 21:10:17,570 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:17,570 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619283306] [2019-10-13 21:10:17,570 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:17,570 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:17,571 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:17,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:17,682 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:10:17,683 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619283306] [2019-10-13 21:10:17,683 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775518374] [2019-10-13 21:10:17,683 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:18,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:18,398 INFO L256 TraceCheckSpWp]: Trace formula consists of 3189 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:18,402 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:18,422 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:10:18,423 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:18,610 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:10:18,611 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:18,611 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-13 21:10:18,611 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252789180] [2019-10-13 21:10:18,614 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:18,614 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:18,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:18,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:10:18,614 INFO L87 Difference]: Start difference. First operand 721 states and 1119 transitions. Second operand 4 states. [2019-10-13 21:10:18,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:18,802 INFO L93 Difference]: Finished difference Result 1361 states and 2135 transitions. [2019-10-13 21:10:18,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:10:18,803 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 133 [2019-10-13 21:10:18,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:18,809 INFO L225 Difference]: With dead ends: 1361 [2019-10-13 21:10:18,810 INFO L226 Difference]: Without dead ends: 721 [2019-10-13 21:10:18,814 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 262 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:10:18,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2019-10-13 21:10:18,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 721. [2019-10-13 21:10:18,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 721 states. [2019-10-13 21:10:18,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 1114 transitions. [2019-10-13 21:10:18,839 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 1114 transitions. Word has length 133 [2019-10-13 21:10:18,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:18,840 INFO L462 AbstractCegarLoop]: Abstraction has 721 states and 1114 transitions. [2019-10-13 21:10:18,840 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:18,840 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 1114 transitions. [2019-10-13 21:10:18,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-10-13 21:10:18,842 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:18,842 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:10:19,049 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:19,050 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:19,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:19,050 INFO L82 PathProgramCache]: Analyzing trace with hash -631538628, now seen corresponding path program 1 times [2019-10-13 21:10:19,050 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:19,050 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009224319] [2019-10-13 21:10:19,051 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:19,051 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:19,051 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:19,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:19,136 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:10:19,136 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009224319] [2019-10-13 21:10:19,137 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955777897] [2019-10-13 21:10:19,137 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:19,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:19,818 INFO L256 TraceCheckSpWp]: Trace formula consists of 3184 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 21:10:19,823 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:19,912 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 21:10:19,912 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:20,242 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:10:20,344 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 21:10:20,345 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:10:20,345 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [4] total 13 [2019-10-13 21:10:20,345 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607980011] [2019-10-13 21:10:20,346 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 21:10:20,346 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:20,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 21:10:20,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2019-10-13 21:10:20,346 INFO L87 Difference]: Start difference. First operand 721 states and 1114 transitions. Second operand 11 states. [2019-10-13 21:10:20,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:20,581 INFO L93 Difference]: Finished difference Result 1288 states and 2023 transitions. [2019-10-13 21:10:20,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 21:10:20,582 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 132 [2019-10-13 21:10:20,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:20,587 INFO L225 Difference]: With dead ends: 1288 [2019-10-13 21:10:20,587 INFO L226 Difference]: Without dead ends: 735 [2019-10-13 21:10:20,590 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 251 SyntacticMatches, 7 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2019-10-13 21:10:20,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2019-10-13 21:10:20,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 730. [2019-10-13 21:10:20,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 730 states. [2019-10-13 21:10:20,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 730 states to 730 states and 1131 transitions. [2019-10-13 21:10:20,623 INFO L78 Accepts]: Start accepts. Automaton has 730 states and 1131 transitions. Word has length 132 [2019-10-13 21:10:20,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:20,624 INFO L462 AbstractCegarLoop]: Abstraction has 730 states and 1131 transitions. [2019-10-13 21:10:20,624 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 21:10:20,624 INFO L276 IsEmpty]: Start isEmpty. Operand 730 states and 1131 transitions. [2019-10-13 21:10:20,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-10-13 21:10:20,688 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:20,688 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:10:20,889 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:20,889 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:20,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:20,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1231517626, now seen corresponding path program 1 times [2019-10-13 21:10:20,890 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:20,890 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879735268] [2019-10-13 21:10:20,891 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:20,891 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:20,891 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:20,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:20,970 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:10:20,970 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879735268] [2019-10-13 21:10:20,971 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069095352] [2019-10-13 21:10:20,971 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:21,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:21,755 INFO L256 TraceCheckSpWp]: Trace formula consists of 3185 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 21:10:21,760 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:21,795 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:10:21,796 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:22,013 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:10:22,099 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:10:22,099 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:10:22,099 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [4] total 11 [2019-10-13 21:10:22,099 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150574293] [2019-10-13 21:10:22,100 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 21:10:22,100 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:22,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 21:10:22,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:10:22,102 INFO L87 Difference]: Start difference. First operand 730 states and 1131 transitions. Second operand 9 states. [2019-10-13 21:10:22,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:22,291 INFO L93 Difference]: Finished difference Result 1386 states and 2191 transitions. [2019-10-13 21:10:22,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:10:22,291 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 133 [2019-10-13 21:10:22,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:22,296 INFO L225 Difference]: With dead ends: 1386 [2019-10-13 21:10:22,296 INFO L226 Difference]: Without dead ends: 739 [2019-10-13 21:10:22,300 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 260 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:10:22,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2019-10-13 21:10:22,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 737. [2019-10-13 21:10:22,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 737 states. [2019-10-13 21:10:22,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 1139 transitions. [2019-10-13 21:10:22,325 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 1139 transitions. Word has length 133 [2019-10-13 21:10:22,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:22,326 INFO L462 AbstractCegarLoop]: Abstraction has 737 states and 1139 transitions. [2019-10-13 21:10:22,326 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 21:10:22,326 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 1139 transitions. [2019-10-13 21:10:22,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-10-13 21:10:22,328 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:22,328 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:22,536 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:22,536 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:22,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:22,537 INFO L82 PathProgramCache]: Analyzing trace with hash -329564981, now seen corresponding path program 1 times [2019-10-13 21:10:22,537 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:22,537 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778463297] [2019-10-13 21:10:22,537 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:22,537 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:22,537 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:22,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:22,634 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:10:22,635 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778463297] [2019-10-13 21:10:22,635 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491920759] [2019-10-13 21:10:22,635 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:23,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:23,391 INFO L256 TraceCheckSpWp]: Trace formula consists of 3186 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 21:10:23,394 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:23,426 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:10:23,426 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:23,740 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:10:23,819 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:10:23,819 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:10:23,820 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [4] total 10 [2019-10-13 21:10:23,820 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140356424] [2019-10-13 21:10:23,821 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 21:10:23,821 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:23,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 21:10:23,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-10-13 21:10:23,822 INFO L87 Difference]: Start difference. First operand 737 states and 1139 transitions. Second operand 8 states. [2019-10-13 21:10:23,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:23,941 INFO L93 Difference]: Finished difference Result 1400 states and 2202 transitions. [2019-10-13 21:10:23,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 21:10:23,942 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 134 [2019-10-13 21:10:23,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:23,947 INFO L225 Difference]: With dead ends: 1400 [2019-10-13 21:10:23,947 INFO L226 Difference]: Without dead ends: 746 [2019-10-13 21:10:23,951 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 262 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2019-10-13 21:10:23,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2019-10-13 21:10:23,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 741. [2019-10-13 21:10:23,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 741 states. [2019-10-13 21:10:23,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 1145 transitions. [2019-10-13 21:10:23,977 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 1145 transitions. Word has length 134 [2019-10-13 21:10:23,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:23,978 INFO L462 AbstractCegarLoop]: Abstraction has 741 states and 1145 transitions. [2019-10-13 21:10:23,978 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 21:10:23,978 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 1145 transitions. [2019-10-13 21:10:23,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-10-13 21:10:23,980 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:23,980 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:10:24,197 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:24,197 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:24,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:24,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1798085965, now seen corresponding path program 1 times [2019-10-13 21:10:24,198 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:24,198 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633798552] [2019-10-13 21:10:24,199 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:24,199 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:24,199 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:24,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:24,289 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:10:24,290 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633798552] [2019-10-13 21:10:24,290 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51934681] [2019-10-13 21:10:24,290 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:25,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:25,040 INFO L256 TraceCheckSpWp]: Trace formula consists of 3184 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-13 21:10:25,044 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:25,124 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-13 21:10:25,124 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:25,718 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:10:25,762 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:10:25,874 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-13 21:10:25,874 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:10:25,874 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [11, 11] imperfect sequences [4] total 19 [2019-10-13 21:10:25,874 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966850114] [2019-10-13 21:10:25,875 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-13 21:10:25,875 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:25,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-13 21:10:25,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2019-10-13 21:10:25,876 INFO L87 Difference]: Start difference. First operand 741 states and 1145 transitions. Second operand 17 states. [2019-10-13 21:10:26,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:26,247 INFO L93 Difference]: Finished difference Result 1315 states and 2060 transitions. [2019-10-13 21:10:26,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-13 21:10:26,248 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 135 [2019-10-13 21:10:26,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:26,253 INFO L225 Difference]: With dead ends: 1315 [2019-10-13 21:10:26,253 INFO L226 Difference]: Without dead ends: 762 [2019-10-13 21:10:26,256 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 252 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2019-10-13 21:10:26,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2019-10-13 21:10:26,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 746. [2019-10-13 21:10:26,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 746 states. [2019-10-13 21:10:26,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 1154 transitions. [2019-10-13 21:10:26,283 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 1154 transitions. Word has length 135 [2019-10-13 21:10:26,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:26,285 INFO L462 AbstractCegarLoop]: Abstraction has 746 states and 1154 transitions. [2019-10-13 21:10:26,285 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-13 21:10:26,285 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 1154 transitions. [2019-10-13 21:10:26,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-10-13 21:10:26,289 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:26,289 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:26,497 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:26,498 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:26,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:26,498 INFO L82 PathProgramCache]: Analyzing trace with hash -107499873, now seen corresponding path program 1 times [2019-10-13 21:10:26,498 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:26,498 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4993420] [2019-10-13 21:10:26,498 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:26,498 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:26,499 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:26,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:26,608 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:10:26,609 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4993420] [2019-10-13 21:10:26,609 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167941868] [2019-10-13 21:10:26,609 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:27,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:27,499 INFO L256 TraceCheckSpWp]: Trace formula consists of 3187 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-13 21:10:27,505 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:27,637 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-13 21:10:27,637 INFO L321 TraceCheckSpWp]: Computing backward predicates...