java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/product-lines/elevator_spec1_product25.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:08:49,392 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:08:49,395 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:08:49,409 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:08:49,409 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:08:49,410 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:08:49,412 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:08:49,413 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:08:49,415 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:08:49,416 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:08:49,417 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:08:49,418 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:08:49,418 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:08:49,419 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:08:49,420 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:08:49,421 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:08:49,422 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:08:49,423 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:08:49,425 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:08:49,428 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:08:49,429 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:08:49,430 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:08:49,431 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:08:49,432 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:08:49,434 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 01:08:49,434 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 01:08:49,435 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 01:08:49,435 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 01:08:49,436 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 01:08:49,437 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 01:08:49,437 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 01:08:49,438 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 01:08:49,439 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 01:08:49,439 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 01:08:49,441 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 01:08:49,441 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 01:08:49,442 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 01:08:49,442 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 01:08:49,442 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:08:49,445 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:08:49,446 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:08:49,449 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 [2019-10-15 01:08:49,469 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:08:49,470 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:08:49,472 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:08:49,472 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:08:49,472 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:08:49,472 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:08:49,473 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:08:49,473 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:08:49,473 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:08:49,473 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:08:49,474 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:08:49,475 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:08:49,475 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:08:49,475 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:08:49,475 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:08:49,476 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:08:49,476 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:08:49,476 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:08:49,476 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:08:49,476 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:08:49,477 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:08:49,477 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:08:49,477 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:08:49,478 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:08:49,478 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:08:49,478 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:08:49,478 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:08:49,478 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:08:49,479 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 [2019-10-15 01:08:49,816 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:08:49,837 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:08:49,840 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:08:49,842 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:08:49,842 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:08:49,843 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec1_product25.cil.c [2019-10-15 01:08:49,903 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ce12a5df/ee94f64a9f514fd7bcf37415c995bbf2/FLAG0b2fc3d10 [2019-10-15 01:08:50,525 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:08:50,526 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec1_product25.cil.c [2019-10-15 01:08:50,548 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ce12a5df/ee94f64a9f514fd7bcf37415c995bbf2/FLAG0b2fc3d10 [2019-10-15 01:08:50,718 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ce12a5df/ee94f64a9f514fd7bcf37415c995bbf2 [2019-10-15 01:08:50,727 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:08:50,728 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:08:50,729 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:08:50,730 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:08:50,733 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:08:50,734 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:08:50" (1/1) ... [2019-10-15 01:08:50,737 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35b66671 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:50, skipping insertion in model container [2019-10-15 01:08:50,737 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:08:50" (1/1) ... [2019-10-15 01:08:50,744 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:08:50,812 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:08:51,550 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:08:51,576 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:08:51,700 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:08:51,762 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:08:51,763 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:51 WrapperNode [2019-10-15 01:08:51,763 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:08:51,765 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:08:51,766 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:08:51,766 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:08:51,779 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:51" (1/1) ... [2019-10-15 01:08:51,779 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:51" (1/1) ... [2019-10-15 01:08:51,810 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:51" (1/1) ... [2019-10-15 01:08:51,811 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:51" (1/1) ... [2019-10-15 01:08:51,869 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:51" (1/1) ... [2019-10-15 01:08:51,906 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:51" (1/1) ... [2019-10-15 01:08:51,926 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:51" (1/1) ... [2019-10-15 01:08:51,960 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:08:51,961 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:08:51,961 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:08:51,962 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:08:51,963 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:51" (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 [2019-10-15 01:08:52,036 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:08:52,036 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:08:52,037 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-15 01:08:52,037 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-15 01:08:52,037 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-15 01:08:52,037 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-15 01:08:52,038 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-15 01:08:52,038 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-15 01:08:52,038 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-15 01:08:52,038 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-15 01:08:52,039 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-15 01:08:52,039 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-15 01:08:52,039 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-15 01:08:52,039 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-10-15 01:08:52,040 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-10-15 01:08:52,040 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-15 01:08:52,040 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-10-15 01:08:52,040 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-10-15 01:08:52,040 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-10-15 01:08:52,041 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-10-15 01:08:52,041 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-10-15 01:08:52,041 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-10-15 01:08:52,042 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-10-15 01:08:52,042 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-10-15 01:08:52,042 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-15 01:08:52,042 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-10-15 01:08:52,042 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-10-15 01:08:52,043 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-10-15 01:08:52,043 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-15 01:08:52,043 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-10-15 01:08:52,043 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-15 01:08:52,043 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-15 01:08:52,044 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:08:52,044 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2019-10-15 01:08:52,044 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__2 [2019-10-15 01:08:52,044 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__3 [2019-10-15 01:08:52,044 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__4 [2019-10-15 01:08:52,044 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-10-15 01:08:52,045 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-10-15 01:08:52,045 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-10-15 01:08:52,045 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-10-15 01:08:52,045 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-10-15 01:08:52,045 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-10-15 01:08:52,046 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-10-15 01:08:52,046 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-10-15 01:08:52,046 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-15 01:08:52,046 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-10-15 01:08:52,046 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-10-15 01:08:52,047 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-10-15 01:08:52,047 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-10-15 01:08:52,047 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-10-15 01:08:52,047 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-10-15 01:08:52,047 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-10-15 01:08:52,048 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-10-15 01:08:52,048 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-10-15 01:08:52,048 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__weight [2019-10-15 01:08:52,048 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-10-15 01:08:52,048 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-10-15 01:08:52,048 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-10-15 01:08:52,049 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-10-15 01:08:52,049 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-10-15 01:08:52,049 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-10-15 01:08:52,049 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-10-15 01:08:52,049 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-10-15 01:08:52,050 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-10-15 01:08:52,050 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-10-15 01:08:52,050 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-10-15 01:08:52,050 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-10-15 01:08:52,050 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-10-15 01:08:52,051 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-10-15 01:08:52,051 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-10-15 01:08:52,051 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-10-15 01:08:52,051 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-15 01:08:52,052 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-10-15 01:08:52,052 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-10-15 01:08:52,052 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:08:52,052 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:08:52,052 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-15 01:08:52,053 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-15 01:08:52,053 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-15 01:08:52,053 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-15 01:08:52,053 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-15 01:08:52,053 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-15 01:08:52,054 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-15 01:08:52,054 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-15 01:08:52,054 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-15 01:08:52,054 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-15 01:08:52,055 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:08:52,055 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-15 01:08:52,055 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-15 01:08:52,055 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:08:52,055 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-15 01:08:52,055 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-15 01:08:52,056 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:08:52,056 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-15 01:08:52,056 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-15 01:08:52,056 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:08:52,057 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-15 01:08:52,057 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-10-15 01:08:52,057 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-10-15 01:08:52,057 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-15 01:08:52,058 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-10-15 01:08:52,058 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-10-15 01:08:52,058 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-10-15 01:08:52,058 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-10-15 01:08:52,058 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-10-15 01:08:52,059 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-10-15 01:08:52,059 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-15 01:08:52,059 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:08:52,059 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-10-15 01:08:52,059 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-10-15 01:08:52,060 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-10-15 01:08:52,060 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-10-15 01:08:52,060 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-10-15 01:08:52,060 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-10-15 01:08:52,060 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-10-15 01:08:52,060 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-10-15 01:08:52,061 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-10-15 01:08:52,061 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-15 01:08:52,061 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-10-15 01:08:52,061 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-10-15 01:08:52,061 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-10-15 01:08:52,062 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-15 01:08:52,062 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-10-15 01:08:52,062 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-15 01:08:52,062 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2019-10-15 01:08:52,062 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__4 [2019-10-15 01:08:52,062 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-15 01:08:52,063 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-15 01:08:52,063 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:08:52,063 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-10-15 01:08:52,063 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-10-15 01:08:52,063 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__2 [2019-10-15 01:08:52,064 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__3 [2019-10-15 01:08:52,064 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-10-15 01:08:52,064 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-10-15 01:08:52,064 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-10-15 01:08:52,064 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-10-15 01:08:52,065 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-10-15 01:08:52,065 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-10-15 01:08:52,065 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-10-15 01:08:52,065 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-10-15 01:08:52,065 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-10-15 01:08:52,066 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-15 01:08:52,066 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-10-15 01:08:52,066 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-10-15 01:08:52,066 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-10-15 01:08:52,066 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-10-15 01:08:52,066 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-10-15 01:08:52,067 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-10-15 01:08:52,067 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__weight [2019-10-15 01:08:52,067 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-10-15 01:08:52,067 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-10-15 01:08:52,067 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-10-15 01:08:52,067 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-10-15 01:08:52,068 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-10-15 01:08:52,068 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-10-15 01:08:52,068 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-10-15 01:08:52,068 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-10-15 01:08:52,068 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-10-15 01:08:52,069 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-10-15 01:08:52,069 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-10-15 01:08:52,069 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:08:52,069 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-15 01:08:52,069 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:08:54,613 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:08:54,614 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-15 01:08:54,616 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:08:54 BoogieIcfgContainer [2019-10-15 01:08:54,616 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:08:54,617 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:08:54,618 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:08:54,622 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:08:54,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:08:50" (1/3) ... [2019-10-15 01:08:54,623 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dabda3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:08:54, skipping insertion in model container [2019-10-15 01:08:54,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:51" (2/3) ... [2019-10-15 01:08:54,623 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dabda3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:08:54, skipping insertion in model container [2019-10-15 01:08:54,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:08:54" (3/3) ... [2019-10-15 01:08:54,626 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product25.cil.c [2019-10-15 01:08:54,637 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:08:54,648 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:08:54,660 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:08:54,702 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:08:54,702 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:08:54,703 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:08:54,703 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:08:54,703 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:08:54,703 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:08:54,703 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:08:54,703 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:08:54,750 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states. [2019-10-15 01:08:54,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-10-15 01:08:54,791 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:54,792 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] [2019-10-15 01:08:54,794 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:54,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:54,799 INFO L82 PathProgramCache]: Analyzing trace with hash 896830833, now seen corresponding path program 1 times [2019-10-15 01:08:54,808 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:54,809 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411029678] [2019-10-15 01:08:54,809 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:54,809 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:54,809 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:55,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:55,518 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:08:55,519 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411029678] [2019-10-15 01:08:55,520 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571592197] [2019-10-15 01:08:55,520 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 [2019-10-15 01:08:56,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:56,223 INFO L256 TraceCheckSpWp]: Trace formula consists of 3204 conjuncts, 1 conjunts are in the unsatisfiable core [2019-10-15 01:08:56,240 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:56,284 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:08:56,286 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:56,545 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:08:56,546 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:08:56,546 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [4] total 4 [2019-10-15 01:08:56,546 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93852601] [2019-10-15 01:08:56,553 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-15 01:08:56,554 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:56,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-15 01:08:56,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:08:56,572 INFO L87 Difference]: Start difference. First operand 759 states. Second operand 2 states. [2019-10-15 01:08:56,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:56,651 INFO L93 Difference]: Finished difference Result 642 states and 1025 transitions. [2019-10-15 01:08:56,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-15 01:08:56,652 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 138 [2019-10-15 01:08:56,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:56,694 INFO L225 Difference]: With dead ends: 642 [2019-10-15 01:08:56,694 INFO L226 Difference]: Without dead ends: 605 [2019-10-15 01:08:56,701 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 277 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:08:56,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2019-10-15 01:08:56,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 605. [2019-10-15 01:08:56,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 605 states. [2019-10-15 01:08:56,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 970 transitions. [2019-10-15 01:08:56,817 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 970 transitions. Word has length 138 [2019-10-15 01:08:56,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:56,820 INFO L462 AbstractCegarLoop]: Abstraction has 605 states and 970 transitions. [2019-10-15 01:08:56,820 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-15 01:08:56,821 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 970 transitions. [2019-10-15 01:08:56,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-10-15 01:08:56,829 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:56,829 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] [2019-10-15 01:08:57,038 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:57,039 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:57,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:57,040 INFO L82 PathProgramCache]: Analyzing trace with hash 155958948, now seen corresponding path program 1 times [2019-10-15 01:08:57,040 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:57,040 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154615401] [2019-10-15 01:08:57,041 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:57,041 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:57,041 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:57,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:57,352 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:08:57,352 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154615401] [2019-10-15 01:08:57,353 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616116171] [2019-10-15 01:08:57,353 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 [2019-10-15 01:08:57,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:57,908 INFO L256 TraceCheckSpWp]: Trace formula consists of 3207 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:08:57,918 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:58,022 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:08:58,022 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:58,315 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:08:58,316 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:08:58,316 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-15 01:08:58,317 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497311030] [2019-10-15 01:08:58,322 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:08:58,322 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:58,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:08:58,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:08:58,323 INFO L87 Difference]: Start difference. First operand 605 states and 970 transitions. Second operand 4 states. [2019-10-15 01:08:58,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:58,446 INFO L93 Difference]: Finished difference Result 1182 states and 1913 transitions. [2019-10-15 01:08:58,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:08:58,447 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 140 [2019-10-15 01:08:58,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:58,453 INFO L225 Difference]: With dead ends: 1182 [2019-10-15 01:08:58,453 INFO L226 Difference]: Without dead ends: 605 [2019-10-15 01:08:58,462 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 276 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:08:58,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2019-10-15 01:08:58,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 605. [2019-10-15 01:08:58,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 605 states. [2019-10-15 01:08:58,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 969 transitions. [2019-10-15 01:08:58,503 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 969 transitions. Word has length 140 [2019-10-15 01:08:58,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:58,504 INFO L462 AbstractCegarLoop]: Abstraction has 605 states and 969 transitions. [2019-10-15 01:08:58,504 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:08:58,504 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 969 transitions. [2019-10-15 01:08:58,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-10-15 01:08:58,510 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:58,510 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] [2019-10-15 01:08:58,718 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:58,719 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:58,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:58,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1824771190, now seen corresponding path program 1 times [2019-10-15 01:08:58,720 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:58,720 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283204494] [2019-10-15 01:08:58,720 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:58,720 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:58,721 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:58,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:58,908 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:08:58,909 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283204494] [2019-10-15 01:08:58,909 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80542260] [2019-10-15 01:08:58,909 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 [2019-10-15 01:08:59,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:59,539 INFO L256 TraceCheckSpWp]: Trace formula consists of 3209 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:08:59,545 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:59,582 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:08:59,583 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:59,819 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:08:59,820 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:08:59,820 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-15 01:08:59,820 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709869055] [2019-10-15 01:08:59,821 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:08:59,821 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:59,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:08:59,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:08:59,822 INFO L87 Difference]: Start difference. First operand 605 states and 969 transitions. Second operand 4 states. [2019-10-15 01:08:59,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:59,898 INFO L93 Difference]: Finished difference Result 1182 states and 1911 transitions. [2019-10-15 01:08:59,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:08:59,898 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 142 [2019-10-15 01:08:59,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:59,904 INFO L225 Difference]: With dead ends: 1182 [2019-10-15 01:08:59,905 INFO L226 Difference]: Without dead ends: 605 [2019-10-15 01:08:59,908 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 280 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:08:59,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2019-10-15 01:08:59,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 605. [2019-10-15 01:08:59,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 605 states. [2019-10-15 01:08:59,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 968 transitions. [2019-10-15 01:08:59,936 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 968 transitions. Word has length 142 [2019-10-15 01:08:59,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:59,937 INFO L462 AbstractCegarLoop]: Abstraction has 605 states and 968 transitions. [2019-10-15 01:08:59,937 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:08:59,937 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 968 transitions. [2019-10-15 01:08:59,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-10-15 01:08:59,942 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:59,942 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] [2019-10-15 01:09:00,150 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:00,150 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:00,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:00,151 INFO L82 PathProgramCache]: Analyzing trace with hash 48166316, now seen corresponding path program 1 times [2019-10-15 01:09:00,151 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:00,152 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107791975] [2019-10-15 01:09:00,152 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:00,153 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:00,153 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:00,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:00,373 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:09:00,373 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107791975] [2019-10-15 01:09:00,373 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424825161] [2019-10-15 01:09:00,373 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 [2019-10-15 01:09:00,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:00,969 INFO L256 TraceCheckSpWp]: Trace formula consists of 3211 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:00,978 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:01,022 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:09:01,022 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:01,348 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:09:01,349 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:01,349 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-15 01:09:01,350 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769211035] [2019-10-15 01:09:01,350 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:01,350 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:01,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:01,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:09:01,353 INFO L87 Difference]: Start difference. First operand 605 states and 968 transitions. Second operand 4 states. [2019-10-15 01:09:01,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:01,456 INFO L93 Difference]: Finished difference Result 1189 states and 1918 transitions. [2019-10-15 01:09:01,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:09:01,456 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 144 [2019-10-15 01:09:01,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:01,462 INFO L225 Difference]: With dead ends: 1189 [2019-10-15 01:09:01,462 INFO L226 Difference]: Without dead ends: 614 [2019-10-15 01:09:01,465 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 284 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:09:01,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2019-10-15 01:09:01,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 614. [2019-10-15 01:09:01,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 614 states. [2019-10-15 01:09:01,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 980 transitions. [2019-10-15 01:09:01,491 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 980 transitions. Word has length 144 [2019-10-15 01:09:01,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:01,491 INFO L462 AbstractCegarLoop]: Abstraction has 614 states and 980 transitions. [2019-10-15 01:09:01,492 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:01,492 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 980 transitions. [2019-10-15 01:09:01,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-10-15 01:09:01,496 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:01,497 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] [2019-10-15 01:09:01,705 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:01,705 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:01,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:01,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1492609617, now seen corresponding path program 1 times [2019-10-15 01:09:01,706 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:01,706 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73992738] [2019-10-15 01:09:01,706 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:01,707 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:01,707 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:01,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:01,821 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:09:01,821 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73992738] [2019-10-15 01:09:01,821 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805320443] [2019-10-15 01:09:01,822 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 [2019-10-15 01:09:02,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:02,414 INFO L256 TraceCheckSpWp]: Trace formula consists of 3212 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:02,424 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:02,465 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:09:02,465 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:02,817 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:09:02,818 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:02,818 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-15 01:09:02,821 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193006115] [2019-10-15 01:09:02,823 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:02,823 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:02,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:02,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:09:02,824 INFO L87 Difference]: Start difference. First operand 614 states and 980 transitions. Second operand 4 states. [2019-10-15 01:09:02,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:02,943 INFO L93 Difference]: Finished difference Result 1191 states and 1919 transitions. [2019-10-15 01:09:02,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:09:02,944 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 145 [2019-10-15 01:09:02,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:02,950 INFO L225 Difference]: With dead ends: 1191 [2019-10-15 01:09:02,951 INFO L226 Difference]: Without dead ends: 614 [2019-10-15 01:09:02,957 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 286 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:09:02,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2019-10-15 01:09:02,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 614. [2019-10-15 01:09:02,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 614 states. [2019-10-15 01:09:02,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 979 transitions. [2019-10-15 01:09:02,993 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 979 transitions. Word has length 145 [2019-10-15 01:09:02,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:02,994 INFO L462 AbstractCegarLoop]: Abstraction has 614 states and 979 transitions. [2019-10-15 01:09:02,994 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:02,994 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 979 transitions. [2019-10-15 01:09:03,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-10-15 01:09:03,001 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:03,001 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] [2019-10-15 01:09:03,219 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:03,219 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:03,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:03,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1011781872, now seen corresponding path program 1 times [2019-10-15 01:09:03,220 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:03,220 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813606532] [2019-10-15 01:09:03,220 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:03,220 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:03,220 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:03,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:03,339 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:09:03,339 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813606532] [2019-10-15 01:09:03,339 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015086245] [2019-10-15 01:09:03,340 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 [2019-10-15 01:09:03,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:03,951 INFO L256 TraceCheckSpWp]: Trace formula consists of 3213 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:03,956 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:03,985 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:09:03,985 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:04,222 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:09:04,223 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:04,224 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-15 01:09:04,224 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287112888] [2019-10-15 01:09:04,225 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:04,226 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:04,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:04,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:09:04,229 INFO L87 Difference]: Start difference. First operand 614 states and 979 transitions. Second operand 4 states. [2019-10-15 01:09:04,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:04,375 INFO L93 Difference]: Finished difference Result 1191 states and 1918 transitions. [2019-10-15 01:09:04,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:09:04,376 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 146 [2019-10-15 01:09:04,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:04,384 INFO L225 Difference]: With dead ends: 1191 [2019-10-15 01:09:04,384 INFO L226 Difference]: Without dead ends: 614 [2019-10-15 01:09:04,388 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 288 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:09:04,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2019-10-15 01:09:04,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 614. [2019-10-15 01:09:04,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 614 states. [2019-10-15 01:09:04,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 978 transitions. [2019-10-15 01:09:04,415 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 978 transitions. Word has length 146 [2019-10-15 01:09:04,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:04,418 INFO L462 AbstractCegarLoop]: Abstraction has 614 states and 978 transitions. [2019-10-15 01:09:04,419 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:04,419 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 978 transitions. [2019-10-15 01:09:04,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-10-15 01:09:04,425 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:04,425 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] [2019-10-15 01:09:04,644 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:04,644 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:04,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:04,645 INFO L82 PathProgramCache]: Analyzing trace with hash 2009217747, now seen corresponding path program 1 times [2019-10-15 01:09:04,645 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:04,645 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531275756] [2019-10-15 01:09:04,645 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:04,645 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:04,645 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:04,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:04,843 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 01:09:04,844 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531275756] [2019-10-15 01:09:04,844 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300037286] [2019-10-15 01:09:04,844 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 [2019-10-15 01:09:05,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:05,441 INFO L256 TraceCheckSpWp]: Trace formula consists of 3214 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:05,445 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:05,477 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:09:05,478 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:05,732 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:09:05,732 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:05,733 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-10-15 01:09:05,733 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763857074] [2019-10-15 01:09:05,733 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:05,734 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:05,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:05,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-10-15 01:09:05,735 INFO L87 Difference]: Start difference. First operand 614 states and 978 transitions. Second operand 4 states. [2019-10-15 01:09:05,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:05,928 INFO L93 Difference]: Finished difference Result 1190 states and 1918 transitions. [2019-10-15 01:09:05,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:09:05,929 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 147 [2019-10-15 01:09:05,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:05,934 INFO L225 Difference]: With dead ends: 1190 [2019-10-15 01:09:05,935 INFO L226 Difference]: Without dead ends: 614 [2019-10-15 01:09:05,940 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 292 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-10-15 01:09:05,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2019-10-15 01:09:05,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 614. [2019-10-15 01:09:05,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 614 states. [2019-10-15 01:09:06,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 973 transitions. [2019-10-15 01:09:06,008 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 973 transitions. Word has length 147 [2019-10-15 01:09:06,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:06,008 INFO L462 AbstractCegarLoop]: Abstraction has 614 states and 973 transitions. [2019-10-15 01:09:06,008 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:06,008 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 973 transitions. [2019-10-15 01:09:06,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-10-15 01:09:06,013 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:06,013 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] [2019-10-15 01:09:06,223 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:06,223 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:06,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:06,224 INFO L82 PathProgramCache]: Analyzing trace with hash -1229116529, now seen corresponding path program 1 times [2019-10-15 01:09:06,224 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:06,224 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62973153] [2019-10-15 01:09:06,224 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:06,224 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:06,225 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:06,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:06,463 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 01:09:06,465 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62973153] [2019-10-15 01:09:06,469 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503690013] [2019-10-15 01:09:06,469 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 [2019-10-15 01:09:07,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:07,127 INFO L256 TraceCheckSpWp]: Trace formula consists of 3216 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:07,132 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:07,171 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:09:07,172 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:07,391 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:09:07,392 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:07,392 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-10-15 01:09:07,392 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494180045] [2019-10-15 01:09:07,393 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:07,393 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:07,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:07,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-10-15 01:09:07,393 INFO L87 Difference]: Start difference. First operand 614 states and 973 transitions. Second operand 4 states. [2019-10-15 01:09:07,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:07,546 INFO L93 Difference]: Finished difference Result 1190 states and 1908 transitions. [2019-10-15 01:09:07,547 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:09:07,547 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 149 [2019-10-15 01:09:07,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:07,553 INFO L225 Difference]: With dead ends: 1190 [2019-10-15 01:09:07,553 INFO L226 Difference]: Without dead ends: 614 [2019-10-15 01:09:07,557 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 296 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-10-15 01:09:07,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2019-10-15 01:09:07,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 614. [2019-10-15 01:09:07,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 614 states. [2019-10-15 01:09:07,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 968 transitions. [2019-10-15 01:09:07,579 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 968 transitions. Word has length 149 [2019-10-15 01:09:07,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:07,580 INFO L462 AbstractCegarLoop]: Abstraction has 614 states and 968 transitions. [2019-10-15 01:09:07,580 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:07,580 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 968 transitions. [2019-10-15 01:09:07,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2019-10-15 01:09:07,584 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:07,585 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] [2019-10-15 01:09:07,792 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:07,793 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:07,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:07,793 INFO L82 PathProgramCache]: Analyzing trace with hash -569391607, now seen corresponding path program 1 times [2019-10-15 01:09:07,793 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:07,794 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181939151] [2019-10-15 01:09:07,794 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:07,794 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:07,794 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:07,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:08,031 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 01:09:08,031 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181939151] [2019-10-15 01:09:08,032 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792624596] [2019-10-15 01:09:08,032 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 [2019-10-15 01:09:08,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:08,785 INFO L256 TraceCheckSpWp]: Trace formula consists of 3218 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:08,791 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:08,837 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:09:08,837 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:09,037 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:09:09,037 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:09,037 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-10-15 01:09:09,037 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618185283] [2019-10-15 01:09:09,038 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:09,038 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:09,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:09,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-10-15 01:09:09,039 INFO L87 Difference]: Start difference. First operand 614 states and 968 transitions. Second operand 4 states. [2019-10-15 01:09:09,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:09,264 INFO L93 Difference]: Finished difference Result 1226 states and 1957 transitions. [2019-10-15 01:09:09,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:09:09,265 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 151 [2019-10-15 01:09:09,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:09,270 INFO L225 Difference]: With dead ends: 1226 [2019-10-15 01:09:09,270 INFO L226 Difference]: Without dead ends: 653 [2019-10-15 01:09:09,273 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 300 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-10-15 01:09:09,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2019-10-15 01:09:09,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 653. [2019-10-15 01:09:09,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 653 states. [2019-10-15 01:09:09,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 1032 transitions. [2019-10-15 01:09:09,294 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 1032 transitions. Word has length 151 [2019-10-15 01:09:09,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:09,294 INFO L462 AbstractCegarLoop]: Abstraction has 653 states and 1032 transitions. [2019-10-15 01:09:09,294 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:09,294 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 1032 transitions. [2019-10-15 01:09:09,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-10-15 01:09:09,298 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:09,299 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] [2019-10-15 01:09:09,505 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:09,506 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:09,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:09,506 INFO L82 PathProgramCache]: Analyzing trace with hash 562048214, now seen corresponding path program 1 times [2019-10-15 01:09:09,506 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:09,506 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018542985] [2019-10-15 01:09:09,506 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:09,507 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:09,507 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:09,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:09,669 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 01:09:09,670 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018542985] [2019-10-15 01:09:09,670 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38255297] [2019-10-15 01:09:09,670 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 [2019-10-15 01:09:10,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:10,414 INFO L256 TraceCheckSpWp]: Trace formula consists of 3219 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:10,419 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:10,459 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:09:10,459 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:10,685 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:09:10,685 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:10,686 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-10-15 01:09:10,686 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73482474] [2019-10-15 01:09:10,687 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:10,687 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:10,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:10,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-10-15 01:09:10,688 INFO L87 Difference]: Start difference. First operand 653 states and 1032 transitions. Second operand 4 states. [2019-10-15 01:09:10,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:10,902 INFO L93 Difference]: Finished difference Result 1229 states and 1960 transitions. [2019-10-15 01:09:10,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:09:10,902 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 152 [2019-10-15 01:09:10,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:10,909 INFO L225 Difference]: With dead ends: 1229 [2019-10-15 01:09:10,909 INFO L226 Difference]: Without dead ends: 653 [2019-10-15 01:09:10,912 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 302 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-10-15 01:09:10,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2019-10-15 01:09:10,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 653. [2019-10-15 01:09:10,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 653 states. [2019-10-15 01:09:10,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 1027 transitions. [2019-10-15 01:09:10,933 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 1027 transitions. Word has length 152 [2019-10-15 01:09:10,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:10,934 INFO L462 AbstractCegarLoop]: Abstraction has 653 states and 1027 transitions. [2019-10-15 01:09:10,934 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:10,935 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 1027 transitions. [2019-10-15 01:09:10,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-10-15 01:09:10,939 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:10,940 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] [2019-10-15 01:09:11,148 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:11,149 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:11,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:11,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1838952981, now seen corresponding path program 1 times [2019-10-15 01:09:11,150 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:11,150 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288049116] [2019-10-15 01:09:11,150 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:11,151 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:11,151 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:11,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:11,292 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 01:09:11,292 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288049116] [2019-10-15 01:09:11,292 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679522191] [2019-10-15 01:09:11,293 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 [2019-10-15 01:09:11,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:11,959 INFO L256 TraceCheckSpWp]: Trace formula consists of 3215 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-15 01:09:11,965 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:12,070 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:09:12,071 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:12,504 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:09:12,622 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:09:12,622 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:12,623 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 9] total 16 [2019-10-15 01:09:12,623 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872696642] [2019-10-15 01:09:12,623 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-15 01:09:12,624 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:12,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-15 01:09:12,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2019-10-15 01:09:12,624 INFO L87 Difference]: Start difference. First operand 653 states and 1027 transitions. Second operand 9 states. [2019-10-15 01:09:12,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:12,955 INFO L93 Difference]: Finished difference Result 1242 states and 1974 transitions. [2019-10-15 01:09:12,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-15 01:09:12,956 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 152 [2019-10-15 01:09:12,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:12,960 INFO L225 Difference]: With dead ends: 1242 [2019-10-15 01:09:12,960 INFO L226 Difference]: Without dead ends: 669 [2019-10-15 01:09:12,963 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 289 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2019-10-15 01:09:12,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2019-10-15 01:09:12,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 662. [2019-10-15 01:09:12,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 662 states. [2019-10-15 01:09:12,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 1040 transitions. [2019-10-15 01:09:12,986 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 1040 transitions. Word has length 152 [2019-10-15 01:09:12,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:12,987 INFO L462 AbstractCegarLoop]: Abstraction has 662 states and 1040 transitions. [2019-10-15 01:09:12,987 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-15 01:09:12,987 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 1040 transitions. [2019-10-15 01:09:12,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-10-15 01:09:12,991 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:12,991 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] [2019-10-15 01:09:13,199 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:13,199 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:13,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:13,200 INFO L82 PathProgramCache]: Analyzing trace with hash -474852236, now seen corresponding path program 1 times [2019-10-15 01:09:13,200 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:13,201 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976049973] [2019-10-15 01:09:13,201 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:13,201 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:13,201 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:13,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:13,302 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:09:13,302 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976049973] [2019-10-15 01:09:13,303 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990572376] [2019-10-15 01:09:13,303 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 [2019-10-15 01:09:14,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:14,133 INFO L256 TraceCheckSpWp]: Trace formula consists of 3214 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:09:14,138 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:14,197 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 01:09:14,198 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:14,514 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 01:09:14,515 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:09:14,515 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 13 [2019-10-15 01:09:14,515 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857656681] [2019-10-15 01:09:14,517 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-15 01:09:14,517 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:14,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-15 01:09:14,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2019-10-15 01:09:14,517 INFO L87 Difference]: Start difference. First operand 662 states and 1040 transitions. Second operand 11 states. [2019-10-15 01:09:14,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:14,683 INFO L93 Difference]: Finished difference Result 1180 states and 1876 transitions. [2019-10-15 01:09:14,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-15 01:09:14,683 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 152 [2019-10-15 01:09:14,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:14,689 INFO L225 Difference]: With dead ends: 1180 [2019-10-15 01:09:14,689 INFO L226 Difference]: Without dead ends: 679 [2019-10-15 01:09:14,692 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 295 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2019-10-15 01:09:14,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2019-10-15 01:09:14,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 669. [2019-10-15 01:09:14,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 669 states. [2019-10-15 01:09:14,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 1050 transitions. [2019-10-15 01:09:14,716 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 1050 transitions. Word has length 152 [2019-10-15 01:09:14,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:14,717 INFO L462 AbstractCegarLoop]: Abstraction has 669 states and 1050 transitions. [2019-10-15 01:09:14,717 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-15 01:09:14,717 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 1050 transitions. [2019-10-15 01:09:14,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-10-15 01:09:14,722 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:14,722 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] [2019-10-15 01:09:14,930 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:14,930 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:14,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:14,931 INFO L82 PathProgramCache]: Analyzing trace with hash 880081424, now seen corresponding path program 1 times [2019-10-15 01:09:14,931 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:14,931 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998893161] [2019-10-15 01:09:14,931 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:14,931 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:14,931 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:14,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:15,047 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:09:15,048 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998893161] [2019-10-15 01:09:15,048 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773746731] [2019-10-15 01:09:15,048 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 [2019-10-15 01:09:15,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:15,848 INFO L256 TraceCheckSpWp]: Trace formula consists of 3215 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:09:15,851 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:15,905 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 01:09:15,905 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:16,214 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 01:09:16,215 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:09:16,215 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 10 [2019-10-15 01:09:16,215 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202744285] [2019-10-15 01:09:16,216 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-15 01:09:16,216 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:16,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-15 01:09:16,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-10-15 01:09:16,216 INFO L87 Difference]: Start difference. First operand 669 states and 1050 transitions. Second operand 8 states. [2019-10-15 01:09:16,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:16,328 INFO L93 Difference]: Finished difference Result 1184 states and 1885 transitions. [2019-10-15 01:09:16,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:09:16,329 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 153 [2019-10-15 01:09:16,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:16,333 INFO L225 Difference]: With dead ends: 1184 [2019-10-15 01:09:16,333 INFO L226 Difference]: Without dead ends: 683 [2019-10-15 01:09:16,336 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 297 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2019-10-15 01:09:16,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2019-10-15 01:09:16,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 676. [2019-10-15 01:09:16,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 676 states. [2019-10-15 01:09:16,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676 states to 676 states and 1061 transitions. [2019-10-15 01:09:16,371 INFO L78 Accepts]: Start accepts. Automaton has 676 states and 1061 transitions. Word has length 153 [2019-10-15 01:09:16,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:16,372 INFO L462 AbstractCegarLoop]: Abstraction has 676 states and 1061 transitions. [2019-10-15 01:09:16,372 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-15 01:09:16,372 INFO L276 IsEmpty]: Start isEmpty. Operand 676 states and 1061 transitions. [2019-10-15 01:09:16,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-10-15 01:09:16,377 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:16,377 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:16,584 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:16,584 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:16,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:16,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1186583152, now seen corresponding path program 1 times [2019-10-15 01:09:16,585 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:16,586 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182132801] [2019-10-15 01:09:16,586 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:16,586 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:16,586 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:16,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:16,686 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:09:16,686 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182132801] [2019-10-15 01:09:16,686 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933610792] [2019-10-15 01:09:16,686 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 [2019-10-15 01:09:17,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:17,395 INFO L256 TraceCheckSpWp]: Trace formula consists of 3211 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-15 01:09:17,399 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:17,472 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:09:17,472 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:17,828 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:09:17,968 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:09:17,969 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:09:17,969 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [4] total 16 [2019-10-15 01:09:17,969 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860149245] [2019-10-15 01:09:17,969 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-15 01:09:17,970 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:17,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-15 01:09:17,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2019-10-15 01:09:17,970 INFO L87 Difference]: Start difference. First operand 676 states and 1061 transitions. Second operand 14 states. [2019-10-15 01:09:18,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:18,238 INFO L93 Difference]: Finished difference Result 1185 states and 1885 transitions. [2019-10-15 01:09:18,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-15 01:09:18,238 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 153 [2019-10-15 01:09:18,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:18,244 INFO L225 Difference]: With dead ends: 1185 [2019-10-15 01:09:18,244 INFO L226 Difference]: Without dead ends: 684 [2019-10-15 01:09:18,248 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 292 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2019-10-15 01:09:18,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2019-10-15 01:09:18,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 676. [2019-10-15 01:09:18,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 676 states. [2019-10-15 01:09:18,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676 states to 676 states and 1061 transitions. [2019-10-15 01:09:18,336 INFO L78 Accepts]: Start accepts. Automaton has 676 states and 1061 transitions. Word has length 153 [2019-10-15 01:09:18,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:18,336 INFO L462 AbstractCegarLoop]: Abstraction has 676 states and 1061 transitions. [2019-10-15 01:09:18,336 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-15 01:09:18,336 INFO L276 IsEmpty]: Start isEmpty. Operand 676 states and 1061 transitions. [2019-10-15 01:09:18,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-10-15 01:09:18,341 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:18,341 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] [2019-10-15 01:09:18,549 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:18,549 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:18,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:18,549 INFO L82 PathProgramCache]: Analyzing trace with hash -951095725, now seen corresponding path program 1 times [2019-10-15 01:09:18,550 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:18,550 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551756909] [2019-10-15 01:09:18,550 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:18,550 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:18,550 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:18,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:18,645 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:09:18,645 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551756909] [2019-10-15 01:09:18,645 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359991688] [2019-10-15 01:09:18,645 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 [2019-10-15 01:09:19,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:19,338 INFO L256 TraceCheckSpWp]: Trace formula consists of 3212 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-15 01:09:19,343 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:19,427 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:09:19,427 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:19,806 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:09:19,921 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:09:19,922 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:09:19,923 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [4] total 13 [2019-10-15 01:09:19,923 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936489593] [2019-10-15 01:09:19,924 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-15 01:09:19,924 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:19,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-15 01:09:19,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2019-10-15 01:09:19,925 INFO L87 Difference]: Start difference. First operand 676 states and 1061 transitions. Second operand 11 states. [2019-10-15 01:09:20,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:20,141 INFO L93 Difference]: Finished difference Result 1186 states and 1893 transitions. [2019-10-15 01:09:20,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-15 01:09:20,142 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 154 [2019-10-15 01:09:20,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:20,147 INFO L225 Difference]: With dead ends: 1186 [2019-10-15 01:09:20,147 INFO L226 Difference]: Without dead ends: 685 [2019-10-15 01:09:20,155 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 295 SyntacticMatches, 7 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2019-10-15 01:09:20,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2019-10-15 01:09:20,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 678. [2019-10-15 01:09:20,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 678 states. [2019-10-15 01:09:20,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 678 states to 678 states and 1067 transitions. [2019-10-15 01:09:20,184 INFO L78 Accepts]: Start accepts. Automaton has 678 states and 1067 transitions. Word has length 154 [2019-10-15 01:09:20,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:20,186 INFO L462 AbstractCegarLoop]: Abstraction has 678 states and 1067 transitions. [2019-10-15 01:09:20,186 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-15 01:09:20,186 INFO L276 IsEmpty]: Start isEmpty. Operand 678 states and 1067 transitions. [2019-10-15 01:09:20,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2019-10-15 01:09:20,191 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:20,191 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] [2019-10-15 01:09:20,399 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:20,399 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:20,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:20,400 INFO L82 PathProgramCache]: Analyzing trace with hash -2003553333, now seen corresponding path program 1 times [2019-10-15 01:09:20,400 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:20,400 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993134323] [2019-10-15 01:09:20,400 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:20,400 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:20,400 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:20,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:20,506 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:09:20,506 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993134323] [2019-10-15 01:09:20,506 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177895554] [2019-10-15 01:09:20,507 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 [2019-10-15 01:09:21,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:21,290 INFO L256 TraceCheckSpWp]: Trace formula consists of 3213 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-15 01:09:21,293 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:21,329 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:09:21,329 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:21,571 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:09:21,648 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:09:21,649 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:09:21,649 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [4] total 11 [2019-10-15 01:09:21,649 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461320354] [2019-10-15 01:09:21,650 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-15 01:09:21,650 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:21,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-15 01:09:21,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2019-10-15 01:09:21,651 INFO L87 Difference]: Start difference. First operand 678 states and 1067 transitions. Second operand 9 states. [2019-10-15 01:09:21,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:21,791 INFO L93 Difference]: Finished difference Result 1282 states and 2058 transitions. [2019-10-15 01:09:21,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:09:21,792 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 155 [2019-10-15 01:09:21,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:21,797 INFO L225 Difference]: With dead ends: 1282 [2019-10-15 01:09:21,798 INFO L226 Difference]: Without dead ends: 687 [2019-10-15 01:09:21,800 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 304 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2019-10-15 01:09:21,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2019-10-15 01:09:21,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 685. [2019-10-15 01:09:21,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 685 states. [2019-10-15 01:09:21,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 1075 transitions. [2019-10-15 01:09:21,838 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 1075 transitions. Word has length 155 [2019-10-15 01:09:21,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:21,838 INFO L462 AbstractCegarLoop]: Abstraction has 685 states and 1075 transitions. [2019-10-15 01:09:21,838 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-15 01:09:21,838 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 1075 transitions. [2019-10-15 01:09:21,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-10-15 01:09:21,843 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:21,843 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] [2019-10-15 01:09:22,051 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:22,052 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:22,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:22,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1385689816, now seen corresponding path program 1 times [2019-10-15 01:09:22,053 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:22,053 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510628532] [2019-10-15 01:09:22,054 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:22,054 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:22,054 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:22,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:22,142 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:09:22,142 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510628532] [2019-10-15 01:09:22,142 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872897278] [2019-10-15 01:09:22,142 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 [2019-10-15 01:09:22,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:22,886 INFO L256 TraceCheckSpWp]: Trace formula consists of 3214 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-15 01:09:22,890 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:22,930 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:09:22,930 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:23,167 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:09:23,232 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:09:23,233 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:09:23,233 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [4] total 10 [2019-10-15 01:09:23,233 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116299844] [2019-10-15 01:09:23,233 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-15 01:09:23,234 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:23,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-15 01:09:23,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-10-15 01:09:23,234 INFO L87 Difference]: Start difference. First operand 685 states and 1075 transitions. Second operand 8 states. [2019-10-15 01:09:23,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:23,353 INFO L93 Difference]: Finished difference Result 1296 states and 2069 transitions. [2019-10-15 01:09:23,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-15 01:09:23,354 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 156 [2019-10-15 01:09:23,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:23,358 INFO L225 Difference]: With dead ends: 1296 [2019-10-15 01:09:23,358 INFO L226 Difference]: Without dead ends: 694 [2019-10-15 01:09:23,361 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 306 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2019-10-15 01:09:23,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2019-10-15 01:09:23,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 689. [2019-10-15 01:09:23,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 689 states. [2019-10-15 01:09:23,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 1081 transitions. [2019-10-15 01:09:23,383 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 1081 transitions. Word has length 156 [2019-10-15 01:09:23,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:23,383 INFO L462 AbstractCegarLoop]: Abstraction has 689 states and 1081 transitions. [2019-10-15 01:09:23,383 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-15 01:09:23,384 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 1081 transitions. [2019-10-15 01:09:23,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2019-10-15 01:09:23,388 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:23,388 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] [2019-10-15 01:09:23,596 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:23,596 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:23,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:23,597 INFO L82 PathProgramCache]: Analyzing trace with hash 2127627972, now seen corresponding path program 1 times [2019-10-15 01:09:23,597 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:23,598 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390349206] [2019-10-15 01:09:23,598 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:23,598 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:23,598 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:23,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:23,680 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:09:23,681 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390349206] [2019-10-15 01:09:23,681 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273274987] [2019-10-15 01:09:23,681 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 [2019-10-15 01:09:24,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:24,582 INFO L256 TraceCheckSpWp]: Trace formula consists of 3212 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-15 01:09:24,585 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:24,675 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-15 01:09:24,676 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:25,296 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:09:25,447 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms