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_spec13_product22.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 21:08:28,985 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 21:08:28,988 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 21:08:29,007 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 21:08:29,007 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 21:08:29,009 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 21:08:29,011 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 21:08:29,021 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 21:08:29,025 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 21:08:29,028 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 21:08:29,029 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 21:08:29,031 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 21:08:29,031 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 21:08:29,032 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 21:08:29,035 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 21:08:29,036 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 21:08:29,037 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 21:08:29,038 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 21:08:29,040 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 21:08:29,044 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 21:08:29,048 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 21:08:29,050 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 21:08:29,052 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 21:08:29,053 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 21:08:29,055 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 21:08:29,055 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 21:08:29,055 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 21:08:29,057 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 21:08:29,058 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 21:08:29,059 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 21:08:29,059 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 21:08:29,060 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 21:08:29,060 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 21:08:29,061 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 21:08:29,062 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 21:08:29,062 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 21:08:29,063 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 21:08:29,063 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 21:08:29,063 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 21:08:29,064 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 21:08:29,065 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 21:08:29,066 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 21:08:29,089 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 21:08:29,089 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 21:08:29,090 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 21:08:29,092 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 21:08:29,092 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 21:08:29,093 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 21:08:29,093 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 21:08:29,093 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 21:08:29,093 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 21:08:29,093 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 21:08:29,094 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 21:08:29,094 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 21:08:29,094 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 21:08:29,094 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 21:08:29,094 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 21:08:29,094 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 21:08:29,095 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 21:08:29,095 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 21:08:29,096 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 21:08:29,097 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 21:08:29,097 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 21:08:29,097 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:08:29,097 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 21:08:29,097 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 21:08:29,098 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 21:08:29,098 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 21:08:29,098 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 21:08:29,101 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 21:08:29,101 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 21:08:29,399 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 21:08:29,424 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 21:08:29,428 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 21:08:29,430 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 21:08:29,430 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 21:08:29,431 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec13_product22.cil.c [2019-10-13 21:08:29,503 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9102cc09/19be186120134a9699e7e06f099a3894/FLAG8b4b428d5 [2019-10-13 21:08:30,151 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 21:08:30,151 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec13_product22.cil.c [2019-10-13 21:08:30,170 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9102cc09/19be186120134a9699e7e06f099a3894/FLAG8b4b428d5 [2019-10-13 21:08:30,321 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9102cc09/19be186120134a9699e7e06f099a3894 [2019-10-13 21:08:30,331 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 21:08:30,333 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 21:08:30,333 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 21:08:30,334 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 21:08:30,338 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 21:08:30,338 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:08:30" (1/1) ... [2019-10-13 21:08:30,341 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a78272c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:30, skipping insertion in model container [2019-10-13 21:08:30,341 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:08:30" (1/1) ... [2019-10-13 21:08:30,348 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 21:08:30,421 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 21:08:31,153 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:08:31,172 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 21:08:31,267 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:08:31,331 INFO L192 MainTranslator]: Completed translation [2019-10-13 21:08:31,332 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:31 WrapperNode [2019-10-13 21:08:31,332 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 21:08:31,333 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 21:08:31,333 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 21:08:31,333 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 21:08:31,346 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:31" (1/1) ... [2019-10-13 21:08:31,346 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:31" (1/1) ... [2019-10-13 21:08:31,377 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:31" (1/1) ... [2019-10-13 21:08:31,377 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:31" (1/1) ... [2019-10-13 21:08:31,436 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:31" (1/1) ... [2019-10-13 21:08:31,467 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:31" (1/1) ... [2019-10-13 21:08:31,481 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:31" (1/1) ... [2019-10-13 21:08:31,496 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 21:08:31,497 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 21:08:31,497 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 21:08:31,498 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 21:08:31,499 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:31" (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 21:08:31,556 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 21:08:31,556 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 21:08:31,557 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-13 21:08:31,557 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-13 21:08:31,557 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-13 21:08:31,558 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-13 21:08:31,558 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-13 21:08:31,558 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-13 21:08:31,558 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-13 21:08:31,559 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-13 21:08:31,559 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-13 21:08:31,559 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-10-13 21:08:31,559 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-10-13 21:08:31,560 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-10-13 21:08:31,560 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-10-13 21:08:31,560 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-10-13 21:08:31,561 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-10-13 21:08:31,562 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-10-13 21:08:31,562 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-10-13 21:08:31,562 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-10-13 21:08:31,562 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-10-13 21:08:31,562 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-10-13 21:08:31,563 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-10-13 21:08:31,563 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-10-13 21:08:31,563 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-10-13 21:08:31,563 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-10-13 21:08:31,563 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-10-13 21:08:31,563 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2019-10-13 21:08:31,563 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-10-13 21:08:31,564 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-10-13 21:08:31,564 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-10-13 21:08:31,564 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__weight [2019-10-13 21:08:31,564 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-10-13 21:08:31,564 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-10-13 21:08:31,564 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-10-13 21:08:31,565 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__twothirdsfull [2019-10-13 21:08:31,565 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-13 21:08:31,565 INFO L138 BoogieDeclarations]: Found implementation of procedure printState__wrappee__twothirdsfull [2019-10-13 21:08:31,565 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-10-13 21:08:31,565 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-10-13 21:08:31,566 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-10-13 21:08:31,566 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-10-13 21:08:31,566 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-10-13 21:08:31,567 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-10-13 21:08:31,567 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-10-13 21:08:31,567 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-10-13 21:08:31,567 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-10-13 21:08:31,568 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-10-13 21:08:31,568 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-10-13 21:08:31,568 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-10-13 21:08:31,568 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-10-13 21:08:31,568 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-10-13 21:08:31,568 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-10-13 21:08:31,569 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-13 21:08:31,569 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-13 21:08:31,569 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-13 21:08:31,569 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-13 21:08:31,569 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-10-13 21:08:31,569 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-10-13 21:08:31,570 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-10-13 21:08:31,570 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-10-13 21:08:31,570 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-10-13 21:08:31,570 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-10-13 21:08:31,570 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-10-13 21:08:31,571 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-10-13 21:08:31,571 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-13 21:08:31,571 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-10-13 21:08:31,571 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-10-13 21:08:31,571 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-10-13 21:08:31,571 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-13 21:08:31,572 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-10-13 21:08:31,572 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-13 21:08:31,572 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-13 21:08:31,572 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 21:08:31,572 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification13_spec__1 [2019-10-13 21:08:31,573 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification13_spec__2 [2019-10-13 21:08:31,573 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 21:08:31,573 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 21:08:31,573 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-10-13 21:08:31,573 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-10-13 21:08:31,574 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-10-13 21:08:31,574 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-10-13 21:08:31,574 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-13 21:08:31,575 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-13 21:08:31,575 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-13 21:08:31,576 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-13 21:08:31,576 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-13 21:08:31,577 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-13 21:08:31,577 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-13 21:08:31,578 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-13 21:08:31,578 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-13 21:08:31,578 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 21:08:31,578 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-13 21:08:31,578 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-13 21:08:31,579 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 21:08:31,579 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-13 21:08:31,579 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-13 21:08:31,579 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 21:08:31,579 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-13 21:08:31,579 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-13 21:08:31,580 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 21:08:31,580 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-13 21:08:31,580 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-13 21:08:31,580 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-10-13 21:08:31,580 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-10-13 21:08:31,580 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-10-13 21:08:31,581 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-10-13 21:08:31,581 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-10-13 21:08:31,581 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-10-13 21:08:31,581 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-10-13 21:08:31,581 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-10-13 21:08:31,581 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-10-13 21:08:31,582 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-13 21:08:31,582 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-10-13 21:08:31,582 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-10-13 21:08:31,582 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-10-13 21:08:31,582 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-10-13 21:08:31,583 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-10-13 21:08:31,583 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-10-13 21:08:31,583 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-10-13 21:08:31,584 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-10-13 21:08:31,584 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-10-13 21:08:31,584 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-10-13 21:08:31,584 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-10-13 21:08:31,586 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-10-13 21:08:31,586 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-10-13 21:08:31,586 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-10-13 21:08:31,586 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-10-13 21:08:31,586 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-10-13 21:08:31,586 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-10-13 21:08:31,587 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2019-10-13 21:08:31,587 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-10-13 21:08:31,587 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-10-13 21:08:31,587 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__weight [2019-10-13 21:08:31,588 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-10-13 21:08:31,588 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-10-13 21:08:31,589 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-10-13 21:08:31,592 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__twothirdsfull [2019-10-13 21:08:31,592 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification13_spec__1 [2019-10-13 21:08:31,592 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification13_spec__2 [2019-10-13 21:08:31,593 INFO L130 BoogieDeclarations]: Found specification of procedure printState__wrappee__twothirdsfull [2019-10-13 21:08:31,593 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-10-13 21:08:31,593 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-10-13 21:08:31,594 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-10-13 21:08:31,597 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-10-13 21:08:31,598 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-10-13 21:08:31,598 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-10-13 21:08:31,598 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-13 21:08:31,598 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-13 21:08:31,598 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-13 21:08:31,598 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-13 21:08:31,599 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 21:08:31,599 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-10-13 21:08:31,599 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-10-13 21:08:31,599 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-10-13 21:08:31,599 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-10-13 21:08:31,599 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-10-13 21:08:31,599 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-10-13 21:08:31,600 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-10-13 21:08:31,600 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-13 21:08:31,600 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-10-13 21:08:31,600 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-13 21:08:31,600 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-13 21:08:31,601 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 21:08:31,601 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 21:08:31,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-13 21:08:31,601 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 21:08:33,727 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 21:08:33,728 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-13 21:08:33,730 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:08:33 BoogieIcfgContainer [2019-10-13 21:08:33,731 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 21:08:33,734 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 21:08:33,734 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 21:08:33,738 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 21:08:33,738 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:08:30" (1/3) ... [2019-10-13 21:08:33,739 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@541e21ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:08:33, skipping insertion in model container [2019-10-13 21:08:33,739 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:31" (2/3) ... [2019-10-13 21:08:33,739 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@541e21ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:08:33, skipping insertion in model container [2019-10-13 21:08:33,740 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:08:33" (3/3) ... [2019-10-13 21:08:33,741 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec13_product22.cil.c [2019-10-13 21:08:33,754 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 21:08:33,766 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 21:08:33,780 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 21:08:33,834 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 21:08:33,835 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 21:08:33,835 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 21:08:33,835 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 21:08:33,835 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 21:08:33,835 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 21:08:33,836 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 21:08:33,836 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 21:08:33,880 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states. [2019-10-13 21:08:33,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-10-13 21:08:33,911 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:33,912 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] [2019-10-13 21:08:33,916 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:33,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:33,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1312558517, now seen corresponding path program 1 times [2019-10-13 21:08:33,931 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:33,932 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512509004] [2019-10-13 21:08:33,932 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:33,932 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:33,932 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:34,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:34,665 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-13 21:08:34,666 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512509004] [2019-10-13 21:08:34,667 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126862209] [2019-10-13 21:08:34,667 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 21:08:35,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:35,308 INFO L256 TraceCheckSpWp]: Trace formula consists of 2878 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:08:35,324 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:35,417 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:08:35,417 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:35,562 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-13 21:08:35,562 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:08:35,563 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 4] total 10 [2019-10-13 21:08:35,563 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283865468] [2019-10-13 21:08:35,569 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:08:35,570 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:35,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:08:35,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-10-13 21:08:35,587 INFO L87 Difference]: Start difference. First operand 807 states. Second operand 4 states. [2019-10-13 21:08:35,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:35,815 INFO L93 Difference]: Finished difference Result 1315 states and 2130 transitions. [2019-10-13 21:08:35,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:08:35,817 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 113 [2019-10-13 21:08:35,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:35,847 INFO L225 Difference]: With dead ends: 1315 [2019-10-13 21:08:35,848 INFO L226 Difference]: Without dead ends: 663 [2019-10-13 21:08:35,860 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 224 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:08:35,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2019-10-13 21:08:35,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 663. [2019-10-13 21:08:35,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 663 states. [2019-10-13 21:08:35,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 1053 transitions. [2019-10-13 21:08:35,967 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 1053 transitions. Word has length 113 [2019-10-13 21:08:35,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:35,967 INFO L462 AbstractCegarLoop]: Abstraction has 663 states and 1053 transitions. [2019-10-13 21:08:35,968 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:08:35,968 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 1053 transitions. [2019-10-13 21:08:35,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-10-13 21:08:35,972 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:35,972 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] [2019-10-13 21:08:36,185 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:36,186 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:36,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:36,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1562455753, now seen corresponding path program 1 times [2019-10-13 21:08:36,186 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:36,187 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700944850] [2019-10-13 21:08:36,187 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:36,187 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:36,187 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:36,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:36,452 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 21:08:36,453 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700944850] [2019-10-13 21:08:36,453 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649601833] [2019-10-13 21:08:36,454 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 21:08:36,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:36,985 INFO L256 TraceCheckSpWp]: Trace formula consists of 2880 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 21:08:36,995 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:37,096 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-13 21:08:37,096 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:37,388 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 21:08:37,389 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:08:37,389 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 16 [2019-10-13 21:08:37,389 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600574041] [2019-10-13 21:08:37,390 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 21:08:37,390 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:37,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 21:08:37,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2019-10-13 21:08:37,391 INFO L87 Difference]: Start difference. First operand 663 states and 1053 transitions. Second operand 7 states. [2019-10-13 21:08:37,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:37,566 INFO L93 Difference]: Finished difference Result 1309 states and 2093 transitions. [2019-10-13 21:08:37,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:08:37,568 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 115 [2019-10-13 21:08:37,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:37,574 INFO L225 Difference]: With dead ends: 1309 [2019-10-13 21:08:37,575 INFO L226 Difference]: Without dead ends: 674 [2019-10-13 21:08:37,578 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 220 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2019-10-13 21:08:37,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2019-10-13 21:08:37,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 670. [2019-10-13 21:08:37,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 670 states. [2019-10-13 21:08:37,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 1065 transitions. [2019-10-13 21:08:37,638 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 1065 transitions. Word has length 115 [2019-10-13 21:08:37,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:37,640 INFO L462 AbstractCegarLoop]: Abstraction has 670 states and 1065 transitions. [2019-10-13 21:08:37,640 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 21:08:37,641 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 1065 transitions. [2019-10-13 21:08:37,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-10-13 21:08:37,649 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:37,649 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] [2019-10-13 21:08:37,858 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:37,859 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:37,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:37,859 INFO L82 PathProgramCache]: Analyzing trace with hash 543611026, now seen corresponding path program 1 times [2019-10-13 21:08:37,859 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:37,859 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268189894] [2019-10-13 21:08:37,859 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:37,860 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:37,860 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:37,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:37,975 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-13 21:08:37,976 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268189894] [2019-10-13 21:08:37,977 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178893322] [2019-10-13 21:08:37,977 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 21:08:38,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:38,527 INFO L256 TraceCheckSpWp]: Trace formula consists of 2881 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:08:38,533 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:38,570 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:08:38,570 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:38,689 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-13 21:08:38,689 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:08:38,690 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-13 21:08:38,690 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309845517] [2019-10-13 21:08:38,691 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:08:38,691 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:38,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:08:38,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:08:38,691 INFO L87 Difference]: Start difference. First operand 670 states and 1065 transitions. Second operand 4 states. [2019-10-13 21:08:38,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:38,804 INFO L93 Difference]: Finished difference Result 1325 states and 2118 transitions. [2019-10-13 21:08:38,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:08:38,804 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 116 [2019-10-13 21:08:38,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:38,811 INFO L225 Difference]: With dead ends: 1325 [2019-10-13 21:08:38,812 INFO L226 Difference]: Without dead ends: 681 [2019-10-13 21:08:38,815 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 228 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:08:38,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2019-10-13 21:08:38,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 679. [2019-10-13 21:08:38,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 679 states. [2019-10-13 21:08:38,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 1073 transitions. [2019-10-13 21:08:38,860 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 1073 transitions. Word has length 116 [2019-10-13 21:08:38,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:38,861 INFO L462 AbstractCegarLoop]: Abstraction has 679 states and 1073 transitions. [2019-10-13 21:08:38,861 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:08:38,861 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 1073 transitions. [2019-10-13 21:08:38,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-10-13 21:08:38,866 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:38,867 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] [2019-10-13 21:08:39,077 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:39,079 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:39,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:39,079 INFO L82 PathProgramCache]: Analyzing trace with hash 246045182, now seen corresponding path program 1 times [2019-10-13 21:08:39,080 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:39,081 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070152888] [2019-10-13 21:08:39,081 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:39,081 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:39,081 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:39,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:39,264 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 21:08:39,265 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070152888] [2019-10-13 21:08:39,265 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860291696] [2019-10-13 21:08:39,265 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 21:08:39,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:39,814 INFO L256 TraceCheckSpWp]: Trace formula consists of 2881 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 21:08:39,824 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:39,887 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-13 21:08:39,887 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:40,099 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 21:08:40,100 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:08:40,100 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 16 [2019-10-13 21:08:40,101 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060608891] [2019-10-13 21:08:40,101 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 21:08:40,102 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:40,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 21:08:40,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2019-10-13 21:08:40,102 INFO L87 Difference]: Start difference. First operand 679 states and 1073 transitions. Second operand 7 states. [2019-10-13 21:08:40,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:40,239 INFO L93 Difference]: Finished difference Result 1326 states and 2109 transitions. [2019-10-13 21:08:40,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:08:40,240 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 116 [2019-10-13 21:08:40,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:40,245 INFO L225 Difference]: With dead ends: 1326 [2019-10-13 21:08:40,245 INFO L226 Difference]: Without dead ends: 688 [2019-10-13 21:08:40,249 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 222 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2019-10-13 21:08:40,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2019-10-13 21:08:40,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 679. [2019-10-13 21:08:40,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 679 states. [2019-10-13 21:08:40,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 1073 transitions. [2019-10-13 21:08:40,276 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 1073 transitions. Word has length 116 [2019-10-13 21:08:40,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:40,276 INFO L462 AbstractCegarLoop]: Abstraction has 679 states and 1073 transitions. [2019-10-13 21:08:40,276 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 21:08:40,276 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 1073 transitions. [2019-10-13 21:08:40,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-10-13 21:08:40,279 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:40,279 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] [2019-10-13 21:08:40,486 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:40,487 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:40,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:40,487 INFO L82 PathProgramCache]: Analyzing trace with hash 703956050, now seen corresponding path program 1 times [2019-10-13 21:08:40,487 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:40,487 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548213894] [2019-10-13 21:08:40,487 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:40,488 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:40,488 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:40,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:40,587 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-13 21:08:40,588 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548213894] [2019-10-13 21:08:40,588 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588852096] [2019-10-13 21:08:40,588 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 21:08:41,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:41,207 INFO L256 TraceCheckSpWp]: Trace formula consists of 2883 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:08:41,212 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:41,240 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-13 21:08:41,240 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:41,354 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 21:08:41,354 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:08:41,354 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-13 21:08:41,355 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736761984] [2019-10-13 21:08:41,356 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:08:41,356 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:41,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:08:41,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:08:41,357 INFO L87 Difference]: Start difference. First operand 679 states and 1073 transitions. Second operand 4 states. [2019-10-13 21:08:41,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:41,595 INFO L93 Difference]: Finished difference Result 1359 states and 2179 transitions. [2019-10-13 21:08:41,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:08:41,597 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 119 [2019-10-13 21:08:41,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:41,607 INFO L225 Difference]: With dead ends: 1359 [2019-10-13 21:08:41,607 INFO L226 Difference]: Without dead ends: 721 [2019-10-13 21:08:41,614 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 234 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 21:08:41,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2019-10-13 21:08:41,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 718. [2019-10-13 21:08:41,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 718 states. [2019-10-13 21:08:41,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 1146 transitions. [2019-10-13 21:08:41,643 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 1146 transitions. Word has length 119 [2019-10-13 21:08:41,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:41,645 INFO L462 AbstractCegarLoop]: Abstraction has 718 states and 1146 transitions. [2019-10-13 21:08:41,645 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:08:41,645 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 1146 transitions. [2019-10-13 21:08:41,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-10-13 21:08:41,649 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:41,650 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] [2019-10-13 21:08:41,857 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:41,858 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:41,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:41,859 INFO L82 PathProgramCache]: Analyzing trace with hash 504600262, now seen corresponding path program 1 times [2019-10-13 21:08:41,860 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:41,860 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731536930] [2019-10-13 21:08:41,861 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:41,861 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:41,861 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:41,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:41,957 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 21:08:41,958 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731536930] [2019-10-13 21:08:41,958 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240383476] [2019-10-13 21:08:41,958 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 21:08:42,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:42,709 INFO L256 TraceCheckSpWp]: Trace formula consists of 2885 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:08:42,715 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:42,748 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 21:08:42,748 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:42,847 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 21:08:42,848 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:08:42,848 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [4] total 7 [2019-10-13 21:08:42,848 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830855361] [2019-10-13 21:08:42,850 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:08:42,852 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:42,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:08:42,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:08:42,853 INFO L87 Difference]: Start difference. First operand 718 states and 1146 transitions. Second operand 5 states. [2019-10-13 21:08:42,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:42,933 INFO L93 Difference]: Finished difference Result 1383 states and 2225 transitions. [2019-10-13 21:08:42,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:08:42,934 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 121 [2019-10-13 21:08:42,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:42,943 INFO L225 Difference]: With dead ends: 1383 [2019-10-13 21:08:42,943 INFO L226 Difference]: Without dead ends: 718 [2019-10-13 21:08:42,947 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 239 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:08:42,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2019-10-13 21:08:42,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 718. [2019-10-13 21:08:42,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 718 states. [2019-10-13 21:08:42,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 1141 transitions. [2019-10-13 21:08:42,976 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 1141 transitions. Word has length 121 [2019-10-13 21:08:42,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:42,977 INFO L462 AbstractCegarLoop]: Abstraction has 718 states and 1141 transitions. [2019-10-13 21:08:42,977 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:08:42,977 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 1141 transitions. [2019-10-13 21:08:42,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-10-13 21:08:42,980 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:42,980 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, 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] [2019-10-13 21:08:43,189 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:43,190 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:43,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:43,190 INFO L82 PathProgramCache]: Analyzing trace with hash -2127688715, now seen corresponding path program 1 times [2019-10-13 21:08:43,190 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:43,190 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324309808] [2019-10-13 21:08:43,190 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:43,191 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:43,191 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:43,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:43,285 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 21:08:43,286 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324309808] [2019-10-13 21:08:43,286 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126056939] [2019-10-13 21:08:43,286 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 21:08:43,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:43,902 INFO L256 TraceCheckSpWp]: Trace formula consists of 2886 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 21:08:43,908 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:43,959 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:08:43,959 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:44,214 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:08:44,216 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:08:44,216 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 13 [2019-10-13 21:08:44,216 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664043029] [2019-10-13 21:08:44,218 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 21:08:44,220 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:44,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 21:08:44,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2019-10-13 21:08:44,221 INFO L87 Difference]: Start difference. First operand 718 states and 1141 transitions. Second operand 11 states. [2019-10-13 21:08:44,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:44,378 INFO L93 Difference]: Finished difference Result 1357 states and 2166 transitions. [2019-10-13 21:08:44,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 21:08:44,379 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 122 [2019-10-13 21:08:44,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:44,385 INFO L225 Difference]: With dead ends: 1357 [2019-10-13 21:08:44,385 INFO L226 Difference]: Without dead ends: 738 [2019-10-13 21:08:44,389 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 235 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 21:08:44,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 738 states. [2019-10-13 21:08:44,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 738 to 725. [2019-10-13 21:08:44,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 725 states. [2019-10-13 21:08:44,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 725 states to 725 states and 1152 transitions. [2019-10-13 21:08:44,420 INFO L78 Accepts]: Start accepts. Automaton has 725 states and 1152 transitions. Word has length 122 [2019-10-13 21:08:44,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:44,420 INFO L462 AbstractCegarLoop]: Abstraction has 725 states and 1152 transitions. [2019-10-13 21:08:44,421 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 21:08:44,421 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states and 1152 transitions. [2019-10-13 21:08:44,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-10-13 21:08:44,423 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:44,423 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 21:08:44,634 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:44,635 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:44,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:44,635 INFO L82 PathProgramCache]: Analyzing trace with hash 454016772, now seen corresponding path program 1 times [2019-10-13 21:08:44,635 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:44,636 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766042731] [2019-10-13 21:08:44,636 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:44,636 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:44,636 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:44,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:44,743 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 21:08:44,744 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766042731] [2019-10-13 21:08:44,748 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153335124] [2019-10-13 21:08:44,748 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 21:08:45,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:45,265 INFO L256 TraceCheckSpWp]: Trace formula consists of 2887 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 21:08:45,271 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:45,325 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:08:45,325 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:45,520 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:08:45,520 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:08:45,521 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 10 [2019-10-13 21:08:45,521 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239948244] [2019-10-13 21:08:45,523 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 21:08:45,524 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:45,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 21:08:45,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-10-13 21:08:45,524 INFO L87 Difference]: Start difference. First operand 725 states and 1152 transitions. Second operand 8 states. [2019-10-13 21:08:45,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:45,670 INFO L93 Difference]: Finished difference Result 1355 states and 2162 transitions. [2019-10-13 21:08:45,671 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:08:45,671 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 123 [2019-10-13 21:08:45,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:45,679 INFO L225 Difference]: With dead ends: 1355 [2019-10-13 21:08:45,679 INFO L226 Difference]: Without dead ends: 736 [2019-10-13 21:08:45,684 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 237 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:08:45,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2019-10-13 21:08:45,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 729. [2019-10-13 21:08:45,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 729 states. [2019-10-13 21:08:45,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 729 states to 729 states and 1157 transitions. [2019-10-13 21:08:45,722 INFO L78 Accepts]: Start accepts. Automaton has 729 states and 1157 transitions. Word has length 123 [2019-10-13 21:08:45,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:45,723 INFO L462 AbstractCegarLoop]: Abstraction has 729 states and 1157 transitions. [2019-10-13 21:08:45,723 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 21:08:45,723 INFO L276 IsEmpty]: Start isEmpty. Operand 729 states and 1157 transitions. [2019-10-13 21:08:45,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-10-13 21:08:45,727 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:45,727 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 21:08:45,946 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:45,947 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:45,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:45,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1900302799, now seen corresponding path program 1 times [2019-10-13 21:08:45,948 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:45,948 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968351983] [2019-10-13 21:08:45,948 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:45,949 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:45,949 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:46,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:46,172 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 21:08:46,172 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968351983] [2019-10-13 21:08:46,172 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754843760] [2019-10-13 21:08:46,173 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 21:08:46,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:46,704 INFO L256 TraceCheckSpWp]: Trace formula consists of 2888 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:08:46,712 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:46,735 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-13 21:08:46,735 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:46,828 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-13 21:08:46,829 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:08:46,829 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [4] total 7 [2019-10-13 21:08:46,829 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880794473] [2019-10-13 21:08:46,830 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:08:46,830 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:46,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:08:46,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:08:46,831 INFO L87 Difference]: Start difference. First operand 729 states and 1157 transitions. Second operand 5 states. [2019-10-13 21:08:47,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:47,007 INFO L93 Difference]: Finished difference Result 1393 states and 2239 transitions. [2019-10-13 21:08:47,007 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:08:47,008 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 124 [2019-10-13 21:08:47,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:47,013 INFO L225 Difference]: With dead ends: 1393 [2019-10-13 21:08:47,014 INFO L226 Difference]: Without dead ends: 774 [2019-10-13 21:08:47,017 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 245 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 21:08:47,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2019-10-13 21:08:47,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 771. [2019-10-13 21:08:47,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 771 states. [2019-10-13 21:08:47,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 1233 transitions. [2019-10-13 21:08:47,044 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 1233 transitions. Word has length 124 [2019-10-13 21:08:47,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:47,045 INFO L462 AbstractCegarLoop]: Abstraction has 771 states and 1233 transitions. [2019-10-13 21:08:47,046 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:08:47,046 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 1233 transitions. [2019-10-13 21:08:47,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-10-13 21:08:47,048 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:47,048 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, 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] [2019-10-13 21:08:47,258 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:47,259 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:47,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:47,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1521963814, now seen corresponding path program 1 times [2019-10-13 21:08:47,259 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:47,260 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791848413] [2019-10-13 21:08:47,260 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:47,260 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:47,260 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:47,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:47,364 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 21:08:47,365 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791848413] [2019-10-13 21:08:47,365 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704762165] [2019-10-13 21:08:47,365 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 21:08:47,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:47,940 INFO L256 TraceCheckSpWp]: Trace formula consists of 2889 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:08:47,944 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:48,027 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 21:08:48,028 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:48,161 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 21:08:48,161 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:08:48,162 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [4] total 8 [2019-10-13 21:08:48,162 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062626601] [2019-10-13 21:08:48,168 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 21:08:48,168 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:48,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 21:08:48,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:08:48,169 INFO L87 Difference]: Start difference. First operand 771 states and 1233 transitions. Second operand 6 states. [2019-10-13 21:08:48,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:48,245 INFO L93 Difference]: Finished difference Result 1447 states and 2324 transitions. [2019-10-13 21:08:48,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:08:48,245 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 125 [2019-10-13 21:08:48,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:48,251 INFO L225 Difference]: With dead ends: 1447 [2019-10-13 21:08:48,251 INFO L226 Difference]: Without dead ends: 767 [2019-10-13 21:08:48,254 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 248 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2019-10-13 21:08:48,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2019-10-13 21:08:48,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 764. [2019-10-13 21:08:48,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 764 states. [2019-10-13 21:08:48,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 1220 transitions. [2019-10-13 21:08:48,298 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 1220 transitions. Word has length 125 [2019-10-13 21:08:48,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:48,299 INFO L462 AbstractCegarLoop]: Abstraction has 764 states and 1220 transitions. [2019-10-13 21:08:48,299 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 21:08:48,299 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 1220 transitions. [2019-10-13 21:08:48,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-10-13 21:08:48,304 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:48,304 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, 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] [2019-10-13 21:08:48,511 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:48,512 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:48,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:48,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1779748070, now seen corresponding path program 1 times [2019-10-13 21:08:48,512 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:48,513 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508852881] [2019-10-13 21:08:48,513 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:48,513 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:48,513 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:48,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:48,600 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 21:08:48,601 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508852881] [2019-10-13 21:08:48,601 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320423981] [2019-10-13 21:08:48,601 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 21:08:49,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:49,112 INFO L256 TraceCheckSpWp]: Trace formula consists of 2889 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-13 21:08:49,124 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:49,183 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-10-13 21:08:49,184 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:49,298 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2019-10-13 21:08:49,298 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:08:49,299 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2019-10-13 21:08:49,299 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011260190] [2019-10-13 21:08:49,299 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:08:49,300 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:49,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:08:49,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:08:49,300 INFO L87 Difference]: Start difference. First operand 764 states and 1220 transitions. Second operand 4 states. [2019-10-13 21:08:50,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:50,357 INFO L93 Difference]: Finished difference Result 2599 states and 4211 transitions. [2019-10-13 21:08:50,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:08:50,358 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 126 [2019-10-13 21:08:50,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:50,372 INFO L225 Difference]: With dead ends: 2599 [2019-10-13 21:08:50,372 INFO L226 Difference]: Without dead ends: 1984 [2019-10-13 21:08:50,376 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 246 SyntacticMatches, 5 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:08:50,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1984 states. [2019-10-13 21:08:50,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1984 to 1842. [2019-10-13 21:08:50,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1842 states. [2019-10-13 21:08:50,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1842 states to 1842 states and 2988 transitions. [2019-10-13 21:08:50,438 INFO L78 Accepts]: Start accepts. Automaton has 1842 states and 2988 transitions. Word has length 126 [2019-10-13 21:08:50,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:50,439 INFO L462 AbstractCegarLoop]: Abstraction has 1842 states and 2988 transitions. [2019-10-13 21:08:50,439 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:08:50,439 INFO L276 IsEmpty]: Start isEmpty. Operand 1842 states and 2988 transitions. [2019-10-13 21:08:50,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2019-10-13 21:08:50,446 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:50,446 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, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:08:50,659 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:50,660 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:50,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:50,660 INFO L82 PathProgramCache]: Analyzing trace with hash -979147877, now seen corresponding path program 1 times [2019-10-13 21:08:50,661 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:50,661 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951152277] [2019-10-13 21:08:50,662 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:50,662 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:50,663 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:50,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:50,780 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 21:08:50,780 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951152277] [2019-10-13 21:08:50,780 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627121156] [2019-10-13 21:08:50,781 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 21:08:51,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:51,389 INFO L256 TraceCheckSpWp]: Trace formula consists of 3254 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-13 21:08:51,396 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:51,461 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-10-13 21:08:51,462 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:51,658 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2019-10-13 21:08:51,658 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:08:51,659 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [4] total 9 [2019-10-13 21:08:51,659 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969799213] [2019-10-13 21:08:51,661 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 21:08:51,661 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:51,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 21:08:51,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:08:51,662 INFO L87 Difference]: Start difference. First operand 1842 states and 2988 transitions. Second operand 7 states. [2019-10-13 21:08:52,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:52,740 INFO L93 Difference]: Finished difference Result 4157 states and 6750 transitions. [2019-10-13 21:08:52,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 21:08:52,740 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 175 [2019-10-13 21:08:52,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:52,756 INFO L225 Difference]: With dead ends: 4157 [2019-10-13 21:08:52,757 INFO L226 Difference]: Without dead ends: 2464 [2019-10-13 21:08:52,765 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 337 SyntacticMatches, 9 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:08:52,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2464 states. [2019-10-13 21:08:52,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2464 to 2460. [2019-10-13 21:08:52,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2460 states. [2019-10-13 21:08:52,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2460 states to 2460 states and 3966 transitions. [2019-10-13 21:08:52,857 INFO L78 Accepts]: Start accepts. Automaton has 2460 states and 3966 transitions. Word has length 175 [2019-10-13 21:08:52,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:52,857 INFO L462 AbstractCegarLoop]: Abstraction has 2460 states and 3966 transitions. [2019-10-13 21:08:52,857 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 21:08:52,858 INFO L276 IsEmpty]: Start isEmpty. Operand 2460 states and 3966 transitions. [2019-10-13 21:08:52,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2019-10-13 21:08:52,865 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:52,865 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, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:08:53,073 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:53,073 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:53,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:53,074 INFO L82 PathProgramCache]: Analyzing trace with hash 2093874489, now seen corresponding path program 1 times [2019-10-13 21:08:53,074 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:53,074 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316633874] [2019-10-13 21:08:53,075 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:53,075 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:53,075 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:53,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:53,180 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 21:08:53,180 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316633874] [2019-10-13 21:08:53,181 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068214050] [2019-10-13 21:08:53,181 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 21:08:53,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:53,744 INFO L256 TraceCheckSpWp]: Trace formula consists of 3254 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 21:08:53,748 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:53,776 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-13 21:08:53,777 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:53,925 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 21:08:53,926 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:08:53,926 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 5 [2019-10-13 21:08:53,926 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841290393] [2019-10-13 21:08:53,927 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:08:53,927 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:53,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:08:53,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 21:08:53,928 INFO L87 Difference]: Start difference. First operand 2460 states and 3966 transitions. Second operand 4 states. [2019-10-13 21:08:54,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:54,026 INFO L93 Difference]: Finished difference Result 4879 states and 7896 transitions. [2019-10-13 21:08:54,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:08:54,027 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 176 [2019-10-13 21:08:54,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:54,044 INFO L225 Difference]: With dead ends: 4879 [2019-10-13 21:08:54,044 INFO L226 Difference]: Without dead ends: 2437 [2019-10-13 21:08:54,055 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 352 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:08:54,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2437 states. [2019-10-13 21:08:54,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2437 to 2437. [2019-10-13 21:08:54,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2437 states. [2019-10-13 21:08:54,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2437 states to 2437 states and 3919 transitions. [2019-10-13 21:08:54,151 INFO L78 Accepts]: Start accepts. Automaton has 2437 states and 3919 transitions. Word has length 176 [2019-10-13 21:08:54,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:54,152 INFO L462 AbstractCegarLoop]: Abstraction has 2437 states and 3919 transitions. [2019-10-13 21:08:54,152 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:08:54,152 INFO L276 IsEmpty]: Start isEmpty. Operand 2437 states and 3919 transitions. [2019-10-13 21:08:54,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2019-10-13 21:08:54,166 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:54,166 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:08:54,375 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:54,375 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:54,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:54,375 INFO L82 PathProgramCache]: Analyzing trace with hash 484285150, now seen corresponding path program 1 times [2019-10-13 21:08:54,376 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:54,376 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518205231] [2019-10-13 21:08:54,376 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:54,376 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:54,376 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:54,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:54,497 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 21:08:54,498 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518205231] [2019-10-13 21:08:54,498 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542287156] [2019-10-13 21:08:54,498 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 21:08:55,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:55,178 INFO L256 TraceCheckSpWp]: Trace formula consists of 3253 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 21:08:55,182 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:55,241 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-13 21:08:55,242 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:55,458 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 21:08:55,458 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:08:55,458 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 13 [2019-10-13 21:08:55,459 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155992092] [2019-10-13 21:08:55,459 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 21:08:55,459 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:55,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 21:08:55,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2019-10-13 21:08:55,460 INFO L87 Difference]: Start difference. First operand 2437 states and 3919 transitions. Second operand 7 states. [2019-10-13 21:08:55,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:55,620 INFO L93 Difference]: Finished difference Result 4848 states and 7797 transitions. [2019-10-13 21:08:55,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:08:55,621 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 174 [2019-10-13 21:08:55,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:55,637 INFO L225 Difference]: With dead ends: 4848 [2019-10-13 21:08:55,638 INFO L226 Difference]: Without dead ends: 2459 [2019-10-13 21:08:55,648 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 338 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:08:55,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2459 states. [2019-10-13 21:08:55,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2459 to 2431. [2019-10-13 21:08:55,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2431 states. [2019-10-13 21:08:55,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2431 states to 2431 states and 3905 transitions. [2019-10-13 21:08:55,735 INFO L78 Accepts]: Start accepts. Automaton has 2431 states and 3905 transitions. Word has length 174 [2019-10-13 21:08:55,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:55,736 INFO L462 AbstractCegarLoop]: Abstraction has 2431 states and 3905 transitions. [2019-10-13 21:08:55,736 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 21:08:55,736 INFO L276 IsEmpty]: Start isEmpty. Operand 2431 states and 3905 transitions. [2019-10-13 21:08:55,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2019-10-13 21:08:55,743 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:55,743 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:08:55,951 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:55,952 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:55,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:55,952 INFO L82 PathProgramCache]: Analyzing trace with hash 623448220, now seen corresponding path program 1 times [2019-10-13 21:08:55,952 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:55,952 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210615548] [2019-10-13 21:08:55,953 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:55,953 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:55,953 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:55,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:56,070 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 21:08:56,071 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210615548] [2019-10-13 21:08:56,071 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204797904] [2019-10-13 21:08:56,071 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 21:08:56,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:56,700 INFO L256 TraceCheckSpWp]: Trace formula consists of 3249 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 21:08:56,704 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:56,854 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-13 21:08:56,855 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:57,101 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:08:57,209 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 21:08:57,209 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:08:57,209 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 9] total 19 [2019-10-13 21:08:57,209 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418630035] [2019-10-13 21:08:57,210 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 21:08:57,210 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:57,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 21:08:57,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2019-10-13 21:08:57,211 INFO L87 Difference]: Start difference. First operand 2431 states and 3905 transitions. Second operand 9 states. [2019-10-13 21:08:57,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:57,447 INFO L93 Difference]: Finished difference Result 4853 states and 7801 transitions. [2019-10-13 21:08:57,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 21:08:57,448 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 174 [2019-10-13 21:08:57,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:57,464 INFO L225 Difference]: With dead ends: 4853 [2019-10-13 21:08:57,464 INFO L226 Difference]: Without dead ends: 2471 [2019-10-13 21:08:57,474 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 333 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2019-10-13 21:08:57,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2471 states. [2019-10-13 21:08:57,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2471 to 2433. [2019-10-13 21:08:57,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2433 states. [2019-10-13 21:08:57,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2433 states to 2433 states and 3909 transitions. [2019-10-13 21:08:57,559 INFO L78 Accepts]: Start accepts. Automaton has 2433 states and 3909 transitions. Word has length 174 [2019-10-13 21:08:57,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:57,559 INFO L462 AbstractCegarLoop]: Abstraction has 2433 states and 3909 transitions. [2019-10-13 21:08:57,560 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 21:08:57,560 INFO L276 IsEmpty]: Start isEmpty. Operand 2433 states and 3909 transitions. [2019-10-13 21:08:57,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2019-10-13 21:08:57,567 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:57,567 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:08:57,774 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:57,775 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:57,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:57,775 INFO L82 PathProgramCache]: Analyzing trace with hash 2081498303, now seen corresponding path program 1 times [2019-10-13 21:08:57,775 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:57,775 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563050104] [2019-10-13 21:08:57,775 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:57,776 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:57,776 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:57,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:57,894 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 21:08:57,894 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563050104] [2019-10-13 21:08:57,894 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074294642] [2019-10-13 21:08:57,894 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 21:08:58,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:58,501 INFO L256 TraceCheckSpWp]: Trace formula consists of 3250 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 21:08:58,505 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:58,581 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-13 21:08:58,581 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:58,829 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:08:58,929 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 21:08:58,930 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:08:58,930 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 9] total 19 [2019-10-13 21:08:58,930 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293133248] [2019-10-13 21:08:58,931 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 21:08:58,931 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:58,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 21:08:58,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2019-10-13 21:08:58,932 INFO L87 Difference]: Start difference. First operand 2433 states and 3909 transitions. Second operand 9 states. [2019-10-13 21:08:59,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:59,224 INFO L93 Difference]: Finished difference Result 4854 states and 7805 transitions. [2019-10-13 21:08:59,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 21:08:59,225 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 175 [2019-10-13 21:08:59,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:59,239 INFO L225 Difference]: With dead ends: 4854 [2019-10-13 21:08:59,239 INFO L226 Difference]: Without dead ends: 2470 [2019-10-13 21:08:59,247 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 335 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2019-10-13 21:08:59,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2470 states. [2019-10-13 21:08:59,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2470 to 2433. [2019-10-13 21:08:59,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2433 states. [2019-10-13 21:08:59,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2433 states to 2433 states and 3909 transitions. [2019-10-13 21:08:59,338 INFO L78 Accepts]: Start accepts. Automaton has 2433 states and 3909 transitions. Word has length 175 [2019-10-13 21:08:59,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:59,339 INFO L462 AbstractCegarLoop]: Abstraction has 2433 states and 3909 transitions. [2019-10-13 21:08:59,339 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 21:08:59,339 INFO L276 IsEmpty]: Start isEmpty. Operand 2433 states and 3909 transitions. [2019-10-13 21:08:59,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2019-10-13 21:08:59,347 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:59,348 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:08:59,556 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:59,556 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:59,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:59,556 INFO L82 PathProgramCache]: Analyzing trace with hash 945076865, now seen corresponding path program 1 times [2019-10-13 21:08:59,556 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:59,556 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953280244] [2019-10-13 21:08:59,557 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:59,557 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:59,557 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:59,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:59,663 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 21:08:59,663 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953280244] [2019-10-13 21:08:59,663 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772643000] [2019-10-13 21:08:59,663 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 21:09:00,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:00,292 INFO L256 TraceCheckSpWp]: Trace formula consists of 3251 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 21:09:00,297 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:00,415 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-13 21:09:00,416 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:00,656 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:09:00,729 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 21:09:00,729 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:00,729 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 9] total 16 [2019-10-13 21:09:00,729 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966685133] [2019-10-13 21:09:00,730 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 21:09:00,730 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:00,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 21:09:00,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2019-10-13 21:09:00,731 INFO L87 Difference]: Start difference. First operand 2433 states and 3909 transitions. Second operand 9 states. [2019-10-13 21:09:00,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:00,968 INFO L93 Difference]: Finished difference Result 4855 states and 7809 transitions. [2019-10-13 21:09:00,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 21:09:00,969 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 176 [2019-10-13 21:09:00,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:00,995 INFO L225 Difference]: With dead ends: 4855 [2019-10-13 21:09:00,995 INFO L226 Difference]: Without dead ends: 2471 [2019-10-13 21:09:01,007 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 337 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 21:09:01,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2471 states. [2019-10-13 21:09:01,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2471 to 2433. [2019-10-13 21:09:01,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2433 states. [2019-10-13 21:09:01,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2433 states to 2433 states and 3909 transitions. [2019-10-13 21:09:01,085 INFO L78 Accepts]: Start accepts. Automaton has 2433 states and 3909 transitions. Word has length 176 [2019-10-13 21:09:01,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:01,086 INFO L462 AbstractCegarLoop]: Abstraction has 2433 states and 3909 transitions. [2019-10-13 21:09:01,086 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 21:09:01,086 INFO L276 IsEmpty]: Start isEmpty. Operand 2433 states and 3909 transitions. [2019-10-13 21:09:01,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2019-10-13 21:09:01,093 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:01,093 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:09:01,301 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:01,301 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:01,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:01,302 INFO L82 PathProgramCache]: Analyzing trace with hash 984416900, now seen corresponding path program 1 times [2019-10-13 21:09:01,302 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:01,302 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357678373] [2019-10-13 21:09:01,302 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:01,302 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:01,302 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:01,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:01,409 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 21:09:01,409 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357678373] [2019-10-13 21:09:01,409 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232651667] [2019-10-13 21:09:01,409 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 21:09:02,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:02,151 INFO L256 TraceCheckSpWp]: Trace formula consists of 3252 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-13 21:09:02,154 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:02,168 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-13 21:09:02,169 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:02,346 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 21:09:02,346 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:02,347 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 8 [2019-10-13 21:09:02,347 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934317592] [2019-10-13 21:09:02,347 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 21:09:02,347 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:02,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 21:09:02,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:09:02,348 INFO L87 Difference]: Start difference. First operand 2433 states and 3909 transitions. Second operand 7 states. [2019-10-13 21:09:02,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:02,489 INFO L93 Difference]: Finished difference Result 4836 states and 7782 transitions. [2019-10-13 21:09:02,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:09:02,490 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 177 [2019-10-13 21:09:02,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:02,502 INFO L225 Difference]: With dead ends: 4836 [2019-10-13 21:09:02,502 INFO L226 Difference]: Without dead ends: 2444 [2019-10-13 21:09:02,509 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 354 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:09:02,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2444 states. [2019-10-13 21:09:02,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2444 to 2426. [2019-10-13 21:09:02,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2426 states. [2019-10-13 21:09:02,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2426 states to 2426 states and 3893 transitions. [2019-10-13 21:09:02,580 INFO L78 Accepts]: Start accepts. Automaton has 2426 states and 3893 transitions. Word has length 177 [2019-10-13 21:09:02,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:02,580 INFO L462 AbstractCegarLoop]: Abstraction has 2426 states and 3893 transitions. [2019-10-13 21:09:02,580 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 21:09:02,580 INFO L276 IsEmpty]: Start isEmpty. Operand 2426 states and 3893 transitions. [2019-10-13 21:09:02,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2019-10-13 21:09:02,587 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:02,587 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:09:02,795 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:02,795 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:02,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:02,796 INFO L82 PathProgramCache]: Analyzing trace with hash -938765285, now seen corresponding path program 1 times [2019-10-13 21:09:02,796 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:02,796 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140498309] [2019-10-13 21:09:02,796 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:02,796 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:02,796 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:02,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:02,908 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:09:02,909 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140498309] [2019-10-13 21:09:02,909 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:09:02,909 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 21:09:02,909 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437912443] [2019-10-13 21:09:02,911 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:02,912 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:02,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:02,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:09:02,912 INFO L87 Difference]: Start difference. First operand 2426 states and 3893 transitions. Second operand 4 states. [2019-10-13 21:09:02,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:02,993 INFO L93 Difference]: Finished difference Result 4788 states and 7710 transitions. [2019-10-13 21:09:02,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:09:02,994 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 178 [2019-10-13 21:09:02,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:03,005 INFO L225 Difference]: With dead ends: 4788 [2019-10-13 21:09:03,005 INFO L226 Difference]: Without dead ends: 2404 [2019-10-13 21:09:03,012 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 21:09:03,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2404 states. [2019-10-13 21:09:03,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2404 to 2404. [2019-10-13 21:09:03,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2404 states. [2019-10-13 21:09:03,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2404 states to 2404 states and 3855 transitions. [2019-10-13 21:09:03,072 INFO L78 Accepts]: Start accepts. Automaton has 2404 states and 3855 transitions. Word has length 178 [2019-10-13 21:09:03,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:03,075 INFO L462 AbstractCegarLoop]: Abstraction has 2404 states and 3855 transitions. [2019-10-13 21:09:03,075 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:09:03,075 INFO L276 IsEmpty]: Start isEmpty. Operand 2404 states and 3855 transitions. [2019-10-13 21:09:03,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2019-10-13 21:09:03,083 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:03,083 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:09:03,083 INFO L410 AbstractCegarLoop]: === Iteration 20 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:03,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:03,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1063004848, now seen corresponding path program 1 times [2019-10-13 21:09:03,084 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:03,084 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574072083] [2019-10-13 21:09:03,084 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:03,084 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:03,084 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:03,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:03,219 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 21:09:03,219 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574072083] [2019-10-13 21:09:03,220 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:09:03,220 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 21:09:03,220 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985968540] [2019-10-13 21:09:03,221 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 21:09:03,221 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:03,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 21:09:03,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:09:03,221 INFO L87 Difference]: Start difference. First operand 2404 states and 3855 transitions. Second operand 7 states. [2019-10-13 21:09:03,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:03,350 INFO L93 Difference]: Finished difference Result 4739 states and 7620 transitions. [2019-10-13 21:09:03,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:09:03,350 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 176 [2019-10-13 21:09:03,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:03,362 INFO L225 Difference]: With dead ends: 4739 [2019-10-13 21:09:03,362 INFO L226 Difference]: Without dead ends: 2405 [2019-10-13 21:09:03,369 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:09:03,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2405 states. [2019-10-13 21:09:03,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2405 to 2390. [2019-10-13 21:09:03,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2390 states. [2019-10-13 21:09:03,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2390 states to 2390 states and 3827 transitions. [2019-10-13 21:09:03,431 INFO L78 Accepts]: Start accepts. Automaton has 2390 states and 3827 transitions. Word has length 176 [2019-10-13 21:09:03,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:03,431 INFO L462 AbstractCegarLoop]: Abstraction has 2390 states and 3827 transitions. [2019-10-13 21:09:03,431 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 21:09:03,431 INFO L276 IsEmpty]: Start isEmpty. Operand 2390 states and 3827 transitions. [2019-10-13 21:09:03,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2019-10-13 21:09:03,439 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:03,439 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:09:03,439 INFO L410 AbstractCegarLoop]: === Iteration 21 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:03,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:03,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1813063237, now seen corresponding path program 1 times [2019-10-13 21:09:03,440 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:03,440 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776033328] [2019-10-13 21:09:03,440 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:03,440 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:03,440 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:03,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:03,597 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 21:09:03,598 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776033328] [2019-10-13 21:09:03,598 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:09:03,598 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2019-10-13 21:09:03,598 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159588665] [2019-10-13 21:09:03,598 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 21:09:03,599 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:03,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 21:09:03,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:09:03,599 INFO L87 Difference]: Start difference. First operand 2390 states and 3827 transitions. Second operand 11 states. [2019-10-13 21:09:03,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:03,907 INFO L93 Difference]: Finished difference Result 4754 states and 7640 transitions. [2019-10-13 21:09:03,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 21:09:03,908 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 177 [2019-10-13 21:09:03,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:03,931 INFO L225 Difference]: With dead ends: 4754 [2019-10-13 21:09:03,931 INFO L226 Difference]: Without dead ends: 2400 [2019-10-13 21:09:03,939 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2019-10-13 21:09:03,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2400 states. [2019-10-13 21:09:03,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2400 to 2390. [2019-10-13 21:09:03,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2390 states. [2019-10-13 21:09:04,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2390 states to 2390 states and 3826 transitions. [2019-10-13 21:09:04,005 INFO L78 Accepts]: Start accepts. Automaton has 2390 states and 3826 transitions. Word has length 177 [2019-10-13 21:09:04,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:04,006 INFO L462 AbstractCegarLoop]: Abstraction has 2390 states and 3826 transitions. [2019-10-13 21:09:04,006 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 21:09:04,006 INFO L276 IsEmpty]: Start isEmpty. Operand 2390 states and 3826 transitions. [2019-10-13 21:09:04,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2019-10-13 21:09:04,014 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:04,014 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:09:04,014 INFO L410 AbstractCegarLoop]: === Iteration 22 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:04,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:04,015 INFO L82 PathProgramCache]: Analyzing trace with hash -354422228, now seen corresponding path program 1 times [2019-10-13 21:09:04,015 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:04,015 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637769213] [2019-10-13 21:09:04,016 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:04,016 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:04,016 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:04,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:04,265 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 21:09:04,266 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637769213] [2019-10-13 21:09:04,266 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:09:04,266 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2019-10-13 21:09:04,266 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952365723] [2019-10-13 21:09:04,266 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 21:09:04,267 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:04,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 21:09:04,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:09:04,268 INFO L87 Difference]: Start difference. First operand 2390 states and 3826 transitions. Second operand 11 states. [2019-10-13 21:09:04,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:04,601 INFO L93 Difference]: Finished difference Result 4749 states and 7644 transitions. [2019-10-13 21:09:04,601 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 21:09:04,601 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 178 [2019-10-13 21:09:04,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:04,612 INFO L225 Difference]: With dead ends: 4749 [2019-10-13 21:09:04,612 INFO L226 Difference]: Without dead ends: 2430 [2019-10-13 21:09:04,619 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2019-10-13 21:09:04,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2430 states. [2019-10-13 21:09:04,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2430 to 2420. [2019-10-13 21:09:04,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2420 states. [2019-10-13 21:09:04,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2420 states to 2420 states and 3861 transitions. [2019-10-13 21:09:04,685 INFO L78 Accepts]: Start accepts. Automaton has 2420 states and 3861 transitions. Word has length 178 [2019-10-13 21:09:04,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:04,685 INFO L462 AbstractCegarLoop]: Abstraction has 2420 states and 3861 transitions. [2019-10-13 21:09:04,685 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 21:09:04,685 INFO L276 IsEmpty]: Start isEmpty. Operand 2420 states and 3861 transitions. [2019-10-13 21:09:04,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2019-10-13 21:09:04,693 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:04,693 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:09:04,694 INFO L410 AbstractCegarLoop]: === Iteration 23 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:04,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:04,694 INFO L82 PathProgramCache]: Analyzing trace with hash -2085087520, now seen corresponding path program 1 times [2019-10-13 21:09:04,694 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:04,694 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994254754] [2019-10-13 21:09:04,695 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:04,695 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:04,695 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:04,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat