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_product26.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 21:09:53,514 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 21:09:53,517 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 21:09:53,538 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 21:09:53,538 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 21:09:53,540 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 21:09:53,542 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 21:09:53,553 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 21:09:53,558 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 21:09:53,562 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 21:09:53,563 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 21:09:53,565 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 21:09:53,565 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 21:09:53,567 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 21:09:53,570 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 21:09:53,572 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 21:09:53,574 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 21:09:53,574 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 21:09:53,576 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 21:09:53,581 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 21:09:53,585 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 21:09:53,588 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 21:09:53,590 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 21:09:53,591 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 21:09:53,593 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 21:09:53,593 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 21:09:53,594 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 21:09:53,595 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 21:09:53,597 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 21:09:53,598 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 21:09:53,598 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 21:09:53,599 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 21:09:53,599 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 21:09:53,600 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 21:09:53,602 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 21:09:53,602 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 21:09:53,603 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 21:09:53,603 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 21:09:53,603 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 21:09:53,604 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 21:09:53,605 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 21:09:53,606 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 21:09:53,637 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 21:09:53,637 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 21:09:53,642 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 21:09:53,642 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 21:09:53,642 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 21:09:53,642 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 21:09:53,643 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 21:09:53,643 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 21:09:53,643 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 21:09:53,645 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 21:09:53,645 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 21:09:53,646 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 21:09:53,646 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 21:09:53,646 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 21:09:53,646 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 21:09:53,646 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 21:09:53,646 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 21:09:53,647 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 21:09:53,647 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 21:09:53,647 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 21:09:53,647 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 21:09:53,647 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:09:53,648 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 21:09:53,648 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 21:09:53,648 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 21:09:53,649 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 21:09:53,649 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 21:09:53,649 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 21:09:53,649 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-13 21:09:53,951 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 21:09:53,969 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 21:09:53,973 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 21:09:53,975 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 21:09:53,975 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 21:09:53,976 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec1_product26.cil.c [2019-10-13 21:09:54,055 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89a842ffe/a09ae39c826f49c58fdcb1a3a8706fe7/FLAGf6978348a [2019-10-13 21:09:54,663 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 21:09:54,664 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec1_product26.cil.c [2019-10-13 21:09:54,686 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89a842ffe/a09ae39c826f49c58fdcb1a3a8706fe7/FLAGf6978348a [2019-10-13 21:09:54,949 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89a842ffe/a09ae39c826f49c58fdcb1a3a8706fe7 [2019-10-13 21:09:54,960 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 21:09:54,961 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 21:09:54,962 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 21:09:54,962 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 21:09:54,966 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 21:09:54,966 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:09:54" (1/1) ... [2019-10-13 21:09:54,969 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a4be3b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:54, skipping insertion in model container [2019-10-13 21:09:54,970 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:09:54" (1/1) ... [2019-10-13 21:09:54,977 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 21:09:55,069 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 21:09:55,925 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:09:55,944 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 21:09:56,058 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:09:56,148 INFO L192 MainTranslator]: Completed translation [2019-10-13 21:09:56,149 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:56 WrapperNode [2019-10-13 21:09:56,149 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 21:09:56,150 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 21:09:56,150 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 21:09:56,150 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 21:09:56,167 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:56" (1/1) ... [2019-10-13 21:09:56,168 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:56" (1/1) ... [2019-10-13 21:09:56,222 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:56" (1/1) ... [2019-10-13 21:09:56,224 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:56" (1/1) ... [2019-10-13 21:09:56,303 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:56" (1/1) ... [2019-10-13 21:09:56,344 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:56" (1/1) ... [2019-10-13 21:09:56,363 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:56" (1/1) ... [2019-10-13 21:09:56,393 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 21:09:56,393 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 21:09:56,393 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 21:09:56,394 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 21:09:56,398 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:56" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:09:56,490 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 21:09:56,490 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 21:09:56,491 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-13 21:09:56,491 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-13 21:09:56,491 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-10-13 21:09:56,492 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-10-13 21:09:56,492 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-10-13 21:09:56,493 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-10-13 21:09:56,493 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-10-13 21:09:56,494 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-10-13 21:09:56,494 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__weight [2019-10-13 21:09:56,494 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-10-13 21:09:56,494 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-10-13 21:09:56,495 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-10-13 21:09:56,496 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-10-13 21:09:56,496 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-10-13 21:09:56,498 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-10-13 21:09:56,498 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-10-13 21:09:56,499 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-10-13 21:09:56,500 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-10-13 21:09:56,500 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-10-13 21:09:56,501 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-10-13 21:09:56,501 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-10-13 21:09:56,501 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-10-13 21:09:56,501 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-10-13 21:09:56,501 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-10-13 21:09:56,502 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-10-13 21:09:56,502 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__empty [2019-10-13 21:09:56,502 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-13 21:09:56,502 INFO L138 BoogieDeclarations]: Found implementation of procedure printState__wrappee__empty [2019-10-13 21:09:56,502 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-10-13 21:09:56,503 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-10-13 21:09:56,503 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-13 21:09:56,503 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-13 21:09:56,503 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-13 21:09:56,503 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-13 21:09:56,503 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-13 21:09:56,504 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-13 21:09:56,504 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-13 21:09:56,504 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-13 21:09:56,504 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-13 21:09:56,504 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-13 21:09:56,504 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-10-13 21:09:56,505 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-10-13 21:09:56,505 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-10-13 21:09:56,505 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-10-13 21:09:56,505 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-10-13 21:09:56,505 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2019-10-13 21:09:56,506 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__2 [2019-10-13 21:09:56,506 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__3 [2019-10-13 21:09:56,506 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__4 [2019-10-13 21:09:56,506 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-10-13 21:09:56,506 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-10-13 21:09:56,506 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-10-13 21:09:56,507 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-10-13 21:09:56,507 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-10-13 21:09:56,507 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-10-13 21:09:56,507 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-10-13 21:09:56,507 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-10-13 21:09:56,508 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-13 21:09:56,508 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-10-13 21:09:56,509 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-10-13 21:09:56,509 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-10-13 21:09:56,509 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-13 21:09:56,509 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-10-13 21:09:56,510 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-13 21:09:56,510 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-13 21:09:56,510 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 21:09:56,510 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-13 21:09:56,511 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-10-13 21:09:56,511 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-10-13 21:09:56,511 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-10-13 21:09:56,511 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-10-13 21:09:56,512 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-10-13 21:09:56,512 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-10-13 21:09:56,512 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-10-13 21:09:56,513 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-10-13 21:09:56,513 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 21:09:56,513 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 21:09:56,514 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-10-13 21:09:56,514 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-10-13 21:09:56,514 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-13 21:09:56,515 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-13 21:09:56,515 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-13 21:09:56,515 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-10-13 21:09:56,516 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-10-13 21:09:56,516 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-10-13 21:09:56,517 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-10-13 21:09:56,517 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-10-13 21:09:56,518 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-10-13 21:09:56,518 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-10-13 21:09:56,518 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-10-13 21:09:56,518 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-10-13 21:09:56,518 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-13 21:09:56,518 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-10-13 21:09:56,519 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-10-13 21:09:56,519 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-10-13 21:09:56,519 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-10-13 21:09:56,519 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-10-13 21:09:56,520 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-10-13 21:09:56,520 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-10-13 21:09:56,520 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-10-13 21:09:56,520 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-10-13 21:09:56,520 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-10-13 21:09:56,521 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-10-13 21:09:56,521 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-10-13 21:09:56,521 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__weight [2019-10-13 21:09:56,521 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-10-13 21:09:56,521 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-10-13 21:09:56,522 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-10-13 21:09:56,522 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-10-13 21:09:56,522 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-10-13 21:09:56,522 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-10-13 21:09:56,522 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-10-13 21:09:56,522 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-10-13 21:09:56,523 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-10-13 21:09:56,524 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-10-13 21:09:56,524 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__empty [2019-10-13 21:09:56,524 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__3 [2019-10-13 21:09:56,525 INFO L130 BoogieDeclarations]: Found specification of procedure printState__wrappee__empty [2019-10-13 21:09:56,525 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 21:09:56,525 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-10-13 21:09:56,526 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-13 21:09:56,526 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-13 21:09:56,527 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-13 21:09:56,530 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-13 21:09:56,530 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-13 21:09:56,531 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-13 21:09:56,531 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 21:09:56,531 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-13 21:09:56,531 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-13 21:09:56,532 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 21:09:56,532 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-13 21:09:56,532 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-13 21:09:56,532 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 21:09:56,533 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-13 21:09:56,533 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-13 21:09:56,537 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-13 21:09:56,537 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-13 21:09:56,537 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-13 21:09:56,538 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-13 21:09:56,538 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-13 21:09:56,538 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-10-13 21:09:56,539 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-10-13 21:09:56,545 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-10-13 21:09:56,545 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-10-13 21:09:56,545 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-13 21:09:56,545 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2019-10-13 21:09:56,545 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__2 [2019-10-13 21:09:56,545 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__4 [2019-10-13 21:09:56,546 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 21:09:56,546 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-10-13 21:09:56,546 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-10-13 21:09:56,546 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-10-13 21:09:56,547 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-10-13 21:09:56,547 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-10-13 21:09:56,547 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-10-13 21:09:56,547 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-10-13 21:09:56,548 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-10-13 21:09:56,548 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-10-13 21:09:56,548 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-13 21:09:56,548 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-10-13 21:09:56,548 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-13 21:09:56,548 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-13 21:09:56,548 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 21:09:56,548 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-10-13 21:09:56,549 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 21:09:56,549 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-13 21:09:56,549 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 21:09:58,776 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 21:09:58,777 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-13 21:09:58,779 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:09:58 BoogieIcfgContainer [2019-10-13 21:09:58,779 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 21:09:58,780 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 21:09:58,780 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 21:09:58,784 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 21:09:58,784 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:09:54" (1/3) ... [2019-10-13 21:09:58,785 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a2bc04e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:09:58, skipping insertion in model container [2019-10-13 21:09:58,786 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:56" (2/3) ... [2019-10-13 21:09:58,786 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a2bc04e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:09:58, skipping insertion in model container [2019-10-13 21:09:58,786 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:09:58" (3/3) ... [2019-10-13 21:09:58,788 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product26.cil.c [2019-10-13 21:09:58,800 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 21:09:58,810 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 21:09:58,823 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 21:09:58,858 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 21:09:58,858 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 21:09:58,858 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 21:09:58,858 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 21:09:58,858 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 21:09:58,859 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 21:09:58,859 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 21:09:58,859 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 21:09:58,903 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states. [2019-10-13 21:09:58,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-10-13 21:09:58,931 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:58,932 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:58,934 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:58,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:58,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1704372100, now seen corresponding path program 1 times [2019-10-13 21:09:58,949 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:58,950 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738772488] [2019-10-13 21:09:58,950 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:58,950 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:58,950 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:59,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:59,650 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:09:59,650 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738772488] [2019-10-13 21:09:59,651 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19813409] [2019-10-13 21:09:59,651 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:00,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:00,357 INFO L256 TraceCheckSpWp]: Trace formula consists of 3170 conjuncts, 1 conjunts are in the unsatisfiable core [2019-10-13 21:10:00,384 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:00,436 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:10:00,436 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:00,612 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:10:00,612 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:10:00,613 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [4] total 4 [2019-10-13 21:10:00,613 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322550187] [2019-10-13 21:10:00,619 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-13 21:10:00,621 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:00,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-13 21:10:00,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:10:00,639 INFO L87 Difference]: Start difference. First operand 775 states. Second operand 2 states. [2019-10-13 21:10:00,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:00,748 INFO L93 Difference]: Finished difference Result 651 states and 1038 transitions. [2019-10-13 21:10:00,752 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-13 21:10:00,753 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 116 [2019-10-13 21:10:00,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:00,787 INFO L225 Difference]: With dead ends: 651 [2019-10-13 21:10:00,787 INFO L226 Difference]: Without dead ends: 614 [2019-10-13 21:10:00,794 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:10:00,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2019-10-13 21:10:00,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 614. [2019-10-13 21:10:00,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 614 states. [2019-10-13 21:10:00,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 983 transitions. [2019-10-13 21:10:00,905 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 983 transitions. Word has length 116 [2019-10-13 21:10:00,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:00,908 INFO L462 AbstractCegarLoop]: Abstraction has 614 states and 983 transitions. [2019-10-13 21:10:00,908 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-13 21:10:00,908 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 983 transitions. [2019-10-13 21:10:00,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-10-13 21:10:00,914 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:00,914 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:01,122 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:01,122 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:01,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:01,123 INFO L82 PathProgramCache]: Analyzing trace with hash 2086080695, now seen corresponding path program 1 times [2019-10-13 21:10:01,124 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:01,124 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600574041] [2019-10-13 21:10:01,125 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:01,125 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:01,125 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:01,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:01,456 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:10:01,457 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600574041] [2019-10-13 21:10:01,457 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706634773] [2019-10-13 21:10:01,457 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:02,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:02,010 INFO L256 TraceCheckSpWp]: Trace formula consists of 3173 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:02,017 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:02,112 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:10:02,113 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:02,364 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:10:02,365 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:02,365 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:10:02,365 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973403954] [2019-10-13 21:10:02,367 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:02,367 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:02,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:02,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:10:02,368 INFO L87 Difference]: Start difference. First operand 614 states and 983 transitions. Second operand 4 states. [2019-10-13 21:10:02,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:02,470 INFO L93 Difference]: Finished difference Result 1200 states and 1939 transitions. [2019-10-13 21:10:02,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:10:02,470 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 118 [2019-10-13 21:10:02,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:02,477 INFO L225 Difference]: With dead ends: 1200 [2019-10-13 21:10:02,477 INFO L226 Difference]: Without dead ends: 614 [2019-10-13 21:10:02,483 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 232 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:10:02,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2019-10-13 21:10:02,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 614. [2019-10-13 21:10:02,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 614 states. [2019-10-13 21:10:02,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 982 transitions. [2019-10-13 21:10:02,525 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 982 transitions. Word has length 118 [2019-10-13 21:10:02,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:02,526 INFO L462 AbstractCegarLoop]: Abstraction has 614 states and 982 transitions. [2019-10-13 21:10:02,526 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:02,526 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 982 transitions. [2019-10-13 21:10:02,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-10-13 21:10:02,529 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:02,530 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:02,737 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:02,737 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:02,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:02,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1224648271, now seen corresponding path program 1 times [2019-10-13 21:10:02,738 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:02,738 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711318245] [2019-10-13 21:10:02,739 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:02,739 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:02,739 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:02,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:02,931 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:10:02,931 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711318245] [2019-10-13 21:10:02,932 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469840276] [2019-10-13 21:10:02,932 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:03,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:03,563 INFO L256 TraceCheckSpWp]: Trace formula consists of 3175 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:03,570 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:03,600 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:10:03,600 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:03,782 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:10:03,782 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:03,783 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:10:03,783 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032021659] [2019-10-13 21:10:03,784 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:03,784 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:03,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:03,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:10:03,785 INFO L87 Difference]: Start difference. First operand 614 states and 982 transitions. Second operand 4 states. [2019-10-13 21:10:03,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:03,868 INFO L93 Difference]: Finished difference Result 1200 states and 1937 transitions. [2019-10-13 21:10:03,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:10:03,869 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 120 [2019-10-13 21:10:03,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:03,875 INFO L225 Difference]: With dead ends: 1200 [2019-10-13 21:10:03,875 INFO L226 Difference]: Without dead ends: 614 [2019-10-13 21:10:03,879 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 236 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:10:03,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2019-10-13 21:10:03,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 614. [2019-10-13 21:10:03,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 614 states. [2019-10-13 21:10:03,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 981 transitions. [2019-10-13 21:10:03,909 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 981 transitions. Word has length 120 [2019-10-13 21:10:03,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:03,910 INFO L462 AbstractCegarLoop]: Abstraction has 614 states and 981 transitions. [2019-10-13 21:10:03,910 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:03,910 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 981 transitions. [2019-10-13 21:10:03,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-10-13 21:10:03,913 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:03,913 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:04,121 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:04,121 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:04,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:04,122 INFO L82 PathProgramCache]: Analyzing trace with hash -2135037313, now seen corresponding path program 1 times [2019-10-13 21:10:04,123 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:04,124 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036209216] [2019-10-13 21:10:04,124 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:04,124 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:04,124 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:04,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:04,297 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:10:04,298 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036209216] [2019-10-13 21:10:04,298 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327250979] [2019-10-13 21:10:04,298 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:04,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:04,862 INFO L256 TraceCheckSpWp]: Trace formula consists of 3177 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:04,868 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:04,903 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:10:04,903 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:05,111 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:10:05,112 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:05,112 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:10:05,112 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322667282] [2019-10-13 21:10:05,114 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:05,114 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:05,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:05,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:10:05,116 INFO L87 Difference]: Start difference. First operand 614 states and 981 transitions. Second operand 4 states. [2019-10-13 21:10:05,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:05,200 INFO L93 Difference]: Finished difference Result 1207 states and 1944 transitions. [2019-10-13 21:10:05,200 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:10:05,200 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 122 [2019-10-13 21:10:05,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:05,210 INFO L225 Difference]: With dead ends: 1207 [2019-10-13 21:10:05,210 INFO L226 Difference]: Without dead ends: 623 [2019-10-13 21:10:05,213 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 240 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:10:05,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2019-10-13 21:10:05,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 623. [2019-10-13 21:10:05,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 623 states. [2019-10-13 21:10:05,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 993 transitions. [2019-10-13 21:10:05,250 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 993 transitions. Word has length 122 [2019-10-13 21:10:05,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:05,251 INFO L462 AbstractCegarLoop]: Abstraction has 623 states and 993 transitions. [2019-10-13 21:10:05,251 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:05,251 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 993 transitions. [2019-10-13 21:10:05,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-10-13 21:10:05,254 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:05,254 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:05,471 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:05,471 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:05,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:05,472 INFO L82 PathProgramCache]: Analyzing trace with hash 2064176466, now seen corresponding path program 1 times [2019-10-13 21:10:05,472 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:05,473 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276906950] [2019-10-13 21:10:05,473 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:05,474 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:05,474 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:05,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:05,637 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:10:05,638 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276906950] [2019-10-13 21:10:05,638 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834954400] [2019-10-13 21:10:05,638 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:06,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:06,208 INFO L256 TraceCheckSpWp]: Trace formula consists of 3178 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:06,222 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:06,253 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:10:06,254 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:06,448 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:10:06,448 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:06,448 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:10:06,449 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33318072] [2019-10-13 21:10:06,449 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:06,449 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:06,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:06,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:10:06,450 INFO L87 Difference]: Start difference. First operand 623 states and 993 transitions. Second operand 4 states. [2019-10-13 21:10:06,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:06,521 INFO L93 Difference]: Finished difference Result 1209 states and 1945 transitions. [2019-10-13 21:10:06,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:10:06,522 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 123 [2019-10-13 21:10:06,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:06,527 INFO L225 Difference]: With dead ends: 1209 [2019-10-13 21:10:06,527 INFO L226 Difference]: Without dead ends: 623 [2019-10-13 21:10:06,571 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 242 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:10:06,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2019-10-13 21:10:06,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 623. [2019-10-13 21:10:06,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 623 states. [2019-10-13 21:10:06,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 992 transitions. [2019-10-13 21:10:06,601 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 992 transitions. Word has length 123 [2019-10-13 21:10:06,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:06,602 INFO L462 AbstractCegarLoop]: Abstraction has 623 states and 992 transitions. [2019-10-13 21:10:06,602 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:06,602 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 992 transitions. [2019-10-13 21:10:06,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-10-13 21:10:06,605 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:06,605 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:06,814 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:06,815 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:06,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:06,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1849317603, now seen corresponding path program 1 times [2019-10-13 21:10:06,816 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:06,816 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462281869] [2019-10-13 21:10:06,816 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:06,816 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:06,816 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:06,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:06,952 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:10:06,953 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462281869] [2019-10-13 21:10:06,953 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634960619] [2019-10-13 21:10:06,953 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:07,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:07,512 INFO L256 TraceCheckSpWp]: Trace formula consists of 3179 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:07,516 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:07,553 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:10:07,554 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:07,768 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:10:07,769 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:07,769 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-13 21:10:07,769 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925180059] [2019-10-13 21:10:07,770 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:07,770 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:07,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:07,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:10:07,771 INFO L87 Difference]: Start difference. First operand 623 states and 992 transitions. Second operand 4 states. [2019-10-13 21:10:07,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:07,851 INFO L93 Difference]: Finished difference Result 1209 states and 1944 transitions. [2019-10-13 21:10:07,852 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:10:07,852 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 124 [2019-10-13 21:10:07,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:07,857 INFO L225 Difference]: With dead ends: 1209 [2019-10-13 21:10:07,857 INFO L226 Difference]: Without dead ends: 623 [2019-10-13 21:10:07,860 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 244 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:10:07,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2019-10-13 21:10:07,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 623. [2019-10-13 21:10:07,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 623 states. [2019-10-13 21:10:07,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 991 transitions. [2019-10-13 21:10:07,883 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 991 transitions. Word has length 124 [2019-10-13 21:10:07,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:07,884 INFO L462 AbstractCegarLoop]: Abstraction has 623 states and 991 transitions. [2019-10-13 21:10:07,884 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:07,884 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 991 transitions. [2019-10-13 21:10:07,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-10-13 21:10:07,887 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:07,887 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:08,096 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:08,097 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:08,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:08,097 INFO L82 PathProgramCache]: Analyzing trace with hash -2057806986, now seen corresponding path program 1 times [2019-10-13 21:10:08,098 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:08,098 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249341192] [2019-10-13 21:10:08,099 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:08,099 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:08,099 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:08,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:08,323 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:10:08,323 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249341192] [2019-10-13 21:10:08,323 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984130698] [2019-10-13 21:10:08,324 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:08,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:08,896 INFO L256 TraceCheckSpWp]: Trace formula consists of 3180 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:08,901 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:08,937 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:10:08,937 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:09,127 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:10:09,127 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:09,127 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-10-13 21:10:09,128 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478360202] [2019-10-13 21:10:09,128 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:09,128 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:09,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:09,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:10:09,129 INFO L87 Difference]: Start difference. First operand 623 states and 991 transitions. Second operand 4 states. [2019-10-13 21:10:09,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:09,308 INFO L93 Difference]: Finished difference Result 1208 states and 1944 transitions. [2019-10-13 21:10:09,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:10:09,309 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 125 [2019-10-13 21:10:09,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:09,315 INFO L225 Difference]: With dead ends: 1208 [2019-10-13 21:10:09,315 INFO L226 Difference]: Without dead ends: 623 [2019-10-13 21:10:09,322 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 248 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-10-13 21:10:09,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2019-10-13 21:10:09,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 623. [2019-10-13 21:10:09,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 623 states. [2019-10-13 21:10:09,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 986 transitions. [2019-10-13 21:10:09,345 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 986 transitions. Word has length 125 [2019-10-13 21:10:09,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:09,346 INFO L462 AbstractCegarLoop]: Abstraction has 623 states and 986 transitions. [2019-10-13 21:10:09,346 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:09,346 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 986 transitions. [2019-10-13 21:10:09,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-10-13 21:10:09,348 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:09,349 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:09,565 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:09,566 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:09,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:09,566 INFO L82 PathProgramCache]: Analyzing trace with hash 202858592, now seen corresponding path program 1 times [2019-10-13 21:10:09,566 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:09,566 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882789601] [2019-10-13 21:10:09,567 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:09,567 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:09,567 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:09,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:09,749 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:10:09,750 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882789601] [2019-10-13 21:10:09,755 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474633363] [2019-10-13 21:10:09,756 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:10,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:10,453 INFO L256 TraceCheckSpWp]: Trace formula consists of 3182 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:10,459 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:10,504 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:10:10,505 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:10,697 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:10:10,697 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:10,697 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-10-13 21:10:10,698 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368626028] [2019-10-13 21:10:10,698 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:10,698 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:10,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:10,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:10:10,699 INFO L87 Difference]: Start difference. First operand 623 states and 986 transitions. Second operand 4 states. [2019-10-13 21:10:10,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:10,863 INFO L93 Difference]: Finished difference Result 1208 states and 1934 transitions. [2019-10-13 21:10:10,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:10:10,864 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 127 [2019-10-13 21:10:10,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:10,870 INFO L225 Difference]: With dead ends: 1208 [2019-10-13 21:10:10,871 INFO L226 Difference]: Without dead ends: 623 [2019-10-13 21:10:10,874 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 252 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-10-13 21:10:10,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2019-10-13 21:10:10,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 623. [2019-10-13 21:10:10,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 623 states. [2019-10-13 21:10:10,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 981 transitions. [2019-10-13 21:10:10,893 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 981 transitions. Word has length 127 [2019-10-13 21:10:10,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:10,895 INFO L462 AbstractCegarLoop]: Abstraction has 623 states and 981 transitions. [2019-10-13 21:10:10,895 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:10,895 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 981 transitions. [2019-10-13 21:10:10,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-10-13 21:10:10,897 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:10,897 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:11,106 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:11,107 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:11,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:11,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1413341996, now seen corresponding path program 1 times [2019-10-13 21:10:11,108 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:11,108 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948273722] [2019-10-13 21:10:11,108 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:11,108 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:11,108 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:11,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:11,273 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:10:11,273 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948273722] [2019-10-13 21:10:11,274 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618686758] [2019-10-13 21:10:11,274 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:11,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:11,992 INFO L256 TraceCheckSpWp]: Trace formula consists of 3184 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:11,996 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:12,030 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:10:12,030 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:12,261 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:10:12,261 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:12,261 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-10-13 21:10:12,262 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977651469] [2019-10-13 21:10:12,262 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:12,262 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:12,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:12,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:10:12,263 INFO L87 Difference]: Start difference. First operand 623 states and 981 transitions. Second operand 4 states. [2019-10-13 21:10:12,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:12,457 INFO L93 Difference]: Finished difference Result 1244 states and 1983 transitions. [2019-10-13 21:10:12,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:10:12,457 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 129 [2019-10-13 21:10:12,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:12,462 INFO L225 Difference]: With dead ends: 1244 [2019-10-13 21:10:12,462 INFO L226 Difference]: Without dead ends: 662 [2019-10-13 21:10:12,465 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 256 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-10-13 21:10:12,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2019-10-13 21:10:12,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 662. [2019-10-13 21:10:12,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 662 states. [2019-10-13 21:10:12,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 1045 transitions. [2019-10-13 21:10:12,487 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 1045 transitions. Word has length 129 [2019-10-13 21:10:12,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:12,487 INFO L462 AbstractCegarLoop]: Abstraction has 662 states and 1045 transitions. [2019-10-13 21:10:12,488 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:12,488 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 1045 transitions. [2019-10-13 21:10:12,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-10-13 21:10:12,490 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:12,490 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:12,706 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:12,707 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:12,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:12,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1210514670, now seen corresponding path program 1 times [2019-10-13 21:10:12,708 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:12,708 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228343323] [2019-10-13 21:10:12,709 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:12,709 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:12,709 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:12,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:12,861 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:10:12,862 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228343323] [2019-10-13 21:10:12,862 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722168036] [2019-10-13 21:10:12,862 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:13,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:13,427 INFO L256 TraceCheckSpWp]: Trace formula consists of 3185 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:13,432 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:13,466 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:10:13,467 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:13,720 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:10:13,720 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:13,720 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-10-13 21:10:13,721 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245456337] [2019-10-13 21:10:13,721 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:13,721 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:13,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:13,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:10:13,722 INFO L87 Difference]: Start difference. First operand 662 states and 1045 transitions. Second operand 4 states. [2019-10-13 21:10:13,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:13,936 INFO L93 Difference]: Finished difference Result 1247 states and 1986 transitions. [2019-10-13 21:10:13,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:10:13,937 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 130 [2019-10-13 21:10:13,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:13,942 INFO L225 Difference]: With dead ends: 1247 [2019-10-13 21:10:13,942 INFO L226 Difference]: Without dead ends: 662 [2019-10-13 21:10:13,945 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 258 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-10-13 21:10:13,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2019-10-13 21:10:13,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 662. [2019-10-13 21:10:13,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 662 states. [2019-10-13 21:10:13,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 1040 transitions. [2019-10-13 21:10:13,973 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 1040 transitions. Word has length 130 [2019-10-13 21:10:13,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:13,975 INFO L462 AbstractCegarLoop]: Abstraction has 662 states and 1040 transitions. [2019-10-13 21:10:13,975 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:13,975 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 1040 transitions. [2019-10-13 21:10:13,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-10-13 21:10:13,978 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:13,978 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:14,196 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:14,196 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:14,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:14,197 INFO L82 PathProgramCache]: Analyzing trace with hash 472678801, now seen corresponding path program 1 times [2019-10-13 21:10:14,197 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:14,197 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384975540] [2019-10-13 21:10:14,197 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:14,197 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:14,197 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:14,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:14,326 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:10:14,327 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384975540] [2019-10-13 21:10:14,327 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89412074] [2019-10-13 21:10:14,327 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:14,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:14,986 INFO L256 TraceCheckSpWp]: Trace formula consists of 3181 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 21:10:14,990 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:15,095 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:10:15,096 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:15,484 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:10:15,591 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 21:10:15,591 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:15,591 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 9] total 16 [2019-10-13 21:10:15,592 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999269792] [2019-10-13 21:10:15,592 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 21:10:15,592 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:15,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 21:10:15,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2019-10-13 21:10:15,593 INFO L87 Difference]: Start difference. First operand 662 states and 1040 transitions. Second operand 9 states. [2019-10-13 21:10:15,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:15,858 INFO L93 Difference]: Finished difference Result 1260 states and 2000 transitions. [2019-10-13 21:10:15,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 21:10:15,858 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 130 [2019-10-13 21:10:15,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:15,864 INFO L225 Difference]: With dead ends: 1260 [2019-10-13 21:10:15,864 INFO L226 Difference]: Without dead ends: 678 [2019-10-13 21:10:15,868 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 245 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2019-10-13 21:10:15,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2019-10-13 21:10:15,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 671. [2019-10-13 21:10:15,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 671 states. [2019-10-13 21:10:15,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 1053 transitions. [2019-10-13 21:10:15,901 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 1053 transitions. Word has length 130 [2019-10-13 21:10:15,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:15,902 INFO L462 AbstractCegarLoop]: Abstraction has 671 states and 1053 transitions. [2019-10-13 21:10:15,902 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 21:10:15,902 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 1053 transitions. [2019-10-13 21:10:15,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-10-13 21:10:15,908 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:15,908 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:16,126 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:16,127 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:16,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:16,127 INFO L82 PathProgramCache]: Analyzing trace with hash -336808656, now seen corresponding path program 1 times [2019-10-13 21:10:16,128 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:16,136 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528129819] [2019-10-13 21:10:16,137 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:16,137 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:16,137 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:16,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:16,269 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:10:16,269 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528129819] [2019-10-13 21:10:16,270 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242486062] [2019-10-13 21:10:16,270 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:16,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:16,992 INFO L256 TraceCheckSpWp]: Trace formula consists of 3180 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 21:10:16,997 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:17,043 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:10:17,043 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:17,475 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:10:17,475 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:10:17,476 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 13 [2019-10-13 21:10:17,476 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479643808] [2019-10-13 21:10:17,477 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 21:10:17,477 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:17,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 21:10:17,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2019-10-13 21:10:17,478 INFO L87 Difference]: Start difference. First operand 671 states and 1053 transitions. Second operand 11 states. [2019-10-13 21:10:17,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:17,650 INFO L93 Difference]: Finished difference Result 1198 states and 1902 transitions. [2019-10-13 21:10:17,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 21:10:17,651 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 130 [2019-10-13 21:10:17,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:17,656 INFO L225 Difference]: With dead ends: 1198 [2019-10-13 21:10:17,656 INFO L226 Difference]: Without dead ends: 688 [2019-10-13 21:10:17,659 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 251 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:10:17,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2019-10-13 21:10:17,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 678. [2019-10-13 21:10:17,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 678 states. [2019-10-13 21:10:17,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 678 states to 678 states and 1063 transitions. [2019-10-13 21:10:17,696 INFO L78 Accepts]: Start accepts. Automaton has 678 states and 1063 transitions. Word has length 130 [2019-10-13 21:10:17,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:17,697 INFO L462 AbstractCegarLoop]: Abstraction has 678 states and 1063 transitions. [2019-10-13 21:10:17,697 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 21:10:17,698 INFO L276 IsEmpty]: Start isEmpty. Operand 678 states and 1063 transitions. [2019-10-13 21:10:17,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-10-13 21:10:17,700 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:17,701 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] [2019-10-13 21:10:17,909 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:17,909 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:17,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:17,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1551194657, now seen corresponding path program 1 times [2019-10-13 21:10:17,910 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:17,911 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053396776] [2019-10-13 21:10:17,911 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:17,912 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:17,912 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:17,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:18,004 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:10:18,005 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053396776] [2019-10-13 21:10:18,005 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43273017] [2019-10-13 21:10:18,005 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:18,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:18,822 INFO L256 TraceCheckSpWp]: Trace formula consists of 3181 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 21:10:18,954 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:19,013 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:10:19,014 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:19,280 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:10:19,281 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:10:19,281 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 10 [2019-10-13 21:10:19,281 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677928828] [2019-10-13 21:10:19,282 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 21:10:19,283 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:19,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 21:10:19,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-10-13 21:10:19,284 INFO L87 Difference]: Start difference. First operand 678 states and 1063 transitions. Second operand 8 states. [2019-10-13 21:10:19,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:19,393 INFO L93 Difference]: Finished difference Result 1202 states and 1911 transitions. [2019-10-13 21:10:19,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:10:19,394 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 131 [2019-10-13 21:10:19,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:19,399 INFO L225 Difference]: With dead ends: 1202 [2019-10-13 21:10:19,399 INFO L226 Difference]: Without dead ends: 692 [2019-10-13 21:10:19,402 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 253 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:10:19,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2019-10-13 21:10:19,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 685. [2019-10-13 21:10:19,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 685 states. [2019-10-13 21:10:19,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 1074 transitions. [2019-10-13 21:10:19,429 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 1074 transitions. Word has length 131 [2019-10-13 21:10:19,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:19,430 INFO L462 AbstractCegarLoop]: Abstraction has 685 states and 1074 transitions. [2019-10-13 21:10:19,430 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 21:10:19,430 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 1074 transitions. [2019-10-13 21:10:19,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-10-13 21:10:19,433 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:19,433 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:19,642 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:19,642 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:19,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:19,643 INFO L82 PathProgramCache]: Analyzing trace with hash -433443423, now seen corresponding path program 1 times [2019-10-13 21:10:19,643 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:19,643 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553272667] [2019-10-13 21:10:19,644 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:19,644 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:19,644 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:19,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:19,749 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:10:19,750 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553272667] [2019-10-13 21:10:19,750 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698606850] [2019-10-13 21:10:19,750 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:20,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:20,689 INFO L256 TraceCheckSpWp]: Trace formula consists of 3177 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 21:10:20,696 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:20,786 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 21:10:20,786 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:21,109 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:10:21,240 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 21:10:21,241 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:10:21,241 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [4] total 16 [2019-10-13 21:10:21,241 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819265630] [2019-10-13 21:10:21,242 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-13 21:10:21,242 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:21,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-13 21:10:21,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2019-10-13 21:10:21,243 INFO L87 Difference]: Start difference. First operand 685 states and 1074 transitions. Second operand 14 states. [2019-10-13 21:10:21,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:21,460 INFO L93 Difference]: Finished difference Result 1203 states and 1911 transitions. [2019-10-13 21:10:21,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 21:10:21,461 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 131 [2019-10-13 21:10:21,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:21,465 INFO L225 Difference]: With dead ends: 1203 [2019-10-13 21:10:21,465 INFO L226 Difference]: Without dead ends: 693 [2019-10-13 21:10:21,468 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 248 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2019-10-13 21:10:21,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2019-10-13 21:10:21,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 685. [2019-10-13 21:10:21,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 685 states. [2019-10-13 21:10:21,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 1074 transitions. [2019-10-13 21:10:21,497 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 1074 transitions. Word has length 131 [2019-10-13 21:10:21,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:21,498 INFO L462 AbstractCegarLoop]: Abstraction has 685 states and 1074 transitions. [2019-10-13 21:10:21,498 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-13 21:10:21,498 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 1074 transitions. [2019-10-13 21:10:21,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-10-13 21:10:21,501 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:21,501 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:21,710 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:21,710 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:21,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:21,711 INFO L82 PathProgramCache]: Analyzing trace with hash 227766315, now seen corresponding path program 1 times [2019-10-13 21:10:21,711 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:21,711 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765108512] [2019-10-13 21:10:21,712 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:21,712 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:21,712 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:21,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:21,803 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:10:21,803 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765108512] [2019-10-13 21:10:21,804 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223347679] [2019-10-13 21:10:21,804 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:22,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:22,573 INFO L256 TraceCheckSpWp]: Trace formula consists of 3178 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 21:10:22,577 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:22,647 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 21:10:22,648 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:22,975 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:10:23,097 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 21:10:23,098 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:10:23,098 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [4] total 13 [2019-10-13 21:10:23,098 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960057702] [2019-10-13 21:10:23,098 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 21:10:23,099 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:23,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 21:10:23,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2019-10-13 21:10:23,099 INFO L87 Difference]: Start difference. First operand 685 states and 1074 transitions. Second operand 11 states. [2019-10-13 21:10:23,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:23,340 INFO L93 Difference]: Finished difference Result 1204 states and 1919 transitions. [2019-10-13 21:10:23,340 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 21:10:23,340 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 132 [2019-10-13 21:10:23,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:23,345 INFO L225 Difference]: With dead ends: 1204 [2019-10-13 21:10:23,345 INFO L226 Difference]: Without dead ends: 694 [2019-10-13 21:10:23,350 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 251 SyntacticMatches, 7 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2019-10-13 21:10:23,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2019-10-13 21:10:23,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 687. [2019-10-13 21:10:23,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 687 states. [2019-10-13 21:10:23,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 1080 transitions. [2019-10-13 21:10:23,386 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 1080 transitions. Word has length 132 [2019-10-13 21:10:23,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:23,388 INFO L462 AbstractCegarLoop]: Abstraction has 687 states and 1080 transitions. [2019-10-13 21:10:23,388 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 21:10:23,389 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 1080 transitions. [2019-10-13 21:10:23,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-10-13 21:10:23,392 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:23,392 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:23,602 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:23,602 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:23,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:23,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1923629820, now seen corresponding path program 1 times [2019-10-13 21:10:23,603 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:23,603 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814385170] [2019-10-13 21:10:23,603 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:23,604 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:23,604 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:23,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:23,704 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:10:23,704 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814385170] [2019-10-13 21:10:23,704 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716461923] [2019-10-13 21:10:23,704 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:24,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:24,441 INFO L256 TraceCheckSpWp]: Trace formula consists of 3179 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 21:10:24,448 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:24,480 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:10:24,480 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:24,780 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:10:24,846 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:10:24,847 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:10:24,847 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [4] total 11 [2019-10-13 21:10:24,847 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695276514] [2019-10-13 21:10:24,848 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 21:10:24,848 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:24,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 21:10:24,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:10:24,851 INFO L87 Difference]: Start difference. First operand 687 states and 1080 transitions. Second operand 9 states. [2019-10-13 21:10:24,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:24,979 INFO L93 Difference]: Finished difference Result 1300 states and 2084 transitions. [2019-10-13 21:10:24,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:10:24,980 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 133 [2019-10-13 21:10:24,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:24,986 INFO L225 Difference]: With dead ends: 1300 [2019-10-13 21:10:24,987 INFO L226 Difference]: Without dead ends: 696 [2019-10-13 21:10:24,993 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 260 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:10:24,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2019-10-13 21:10:25,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 694. [2019-10-13 21:10:25,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 694 states. [2019-10-13 21:10:25,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 1088 transitions. [2019-10-13 21:10:25,020 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 1088 transitions. Word has length 133 [2019-10-13 21:10:25,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:25,020 INFO L462 AbstractCegarLoop]: Abstraction has 694 states and 1088 transitions. [2019-10-13 21:10:25,020 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 21:10:25,020 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 1088 transitions. [2019-10-13 21:10:25,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-10-13 21:10:25,023 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:25,024 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:25,233 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:25,234 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:25,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:25,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1458680485, now seen corresponding path program 1 times [2019-10-13 21:10:25,235 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:25,235 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108405675] [2019-10-13 21:10:25,235 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:25,235 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:25,236 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:25,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:25,324 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:10:25,325 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108405675] [2019-10-13 21:10:25,325 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431500600] [2019-10-13 21:10:25,325 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:26,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:26,044 INFO L256 TraceCheckSpWp]: Trace formula consists of 3180 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 21:10:26,063 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:26,105 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:10:26,106 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:26,316 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:10:26,376 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:10:26,377 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:10:26,377 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [4] total 10 [2019-10-13 21:10:26,377 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243646080] [2019-10-13 21:10:26,378 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 21:10:26,378 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:26,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 21:10:26,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-10-13 21:10:26,378 INFO L87 Difference]: Start difference. First operand 694 states and 1088 transitions. Second operand 8 states. [2019-10-13 21:10:26,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:26,500 INFO L93 Difference]: Finished difference Result 1314 states and 2095 transitions. [2019-10-13 21:10:26,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 21:10:26,502 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 134 [2019-10-13 21:10:26,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:26,507 INFO L225 Difference]: With dead ends: 1314 [2019-10-13 21:10:26,508 INFO L226 Difference]: Without dead ends: 703 [2019-10-13 21:10:26,511 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 262 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2019-10-13 21:10:26,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2019-10-13 21:10:26,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 698. [2019-10-13 21:10:26,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 698 states. [2019-10-13 21:10:26,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 1094 transitions. [2019-10-13 21:10:26,533 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 1094 transitions. Word has length 134 [2019-10-13 21:10:26,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:26,534 INFO L462 AbstractCegarLoop]: Abstraction has 698 states and 1094 transitions. [2019-10-13 21:10:26,534 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 21:10:26,534 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 1094 transitions. [2019-10-13 21:10:26,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-10-13 21:10:26,537 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:26,538 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 21:10:26,746 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:26,747 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:26,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:26,747 INFO L82 PathProgramCache]: Analyzing trace with hash -258414647, now seen corresponding path program 1 times [2019-10-13 21:10:26,748 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:26,748 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507373534] [2019-10-13 21:10:26,749 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:26,749 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:26,749 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:26,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:26,835 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:10:26,836 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507373534] [2019-10-13 21:10:26,836 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061454622] [2019-10-13 21:10:26,836 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:27,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:27,599 INFO L256 TraceCheckSpWp]: Trace formula consists of 3186 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:27,605 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:27,722 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:10:27,722 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:27,901 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:10:27,902 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:27,902 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-13 21:10:27,902 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275397454] [2019-10-13 21:10:27,902 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:27,903 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:27,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:27,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:10:27,906 INFO L87 Difference]: Start difference. First operand 698 states and 1094 transitions. Second operand 4 states. [2019-10-13 21:10:28,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:28,086 INFO L93 Difference]: Finished difference Result 1315 states and 2085 transitions. [2019-10-13 21:10:28,101 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:10:28,102 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 136 [2019-10-13 21:10:28,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:28,106 INFO L225 Difference]: With dead ends: 1315 [2019-10-13 21:10:28,107 INFO L226 Difference]: Without dead ends: 698 [2019-10-13 21:10:28,110 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 268 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:10:28,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2019-10-13 21:10:28,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 698. [2019-10-13 21:10:28,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 698 states. [2019-10-13 21:10:28,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 1089 transitions. [2019-10-13 21:10:28,131 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 1089 transitions. Word has length 136 [2019-10-13 21:10:28,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:28,132 INFO L462 AbstractCegarLoop]: Abstraction has 698 states and 1089 transitions. [2019-10-13 21:10:28,132 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:28,132 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 1089 transitions. [2019-10-13 21:10:28,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-10-13 21:10:28,135 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:28,135 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 21:10:28,344 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:28,345 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:28,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:28,345 INFO L82 PathProgramCache]: Analyzing trace with hash 917824741, now seen corresponding path program 1 times [2019-10-13 21:10:28,346 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:28,346 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030387305] [2019-10-13 21:10:28,346 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:28,347 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:28,347 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:28,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:28,428 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:10:28,428 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030387305] [2019-10-13 21:10:28,428 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578547019] [2019-10-13 21:10:28,429 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:29,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:29,190 INFO L256 TraceCheckSpWp]: Trace formula consists of 3187 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-13 21:10:29,196 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:29,280 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-13 21:10:29,281 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:29,481 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:10:29,503 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:10:29,524 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:10:29,533 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:10:29,557 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:10:29,614 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-13 21:10:29,614 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:10:29,615 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 5] imperfect sequences [4] total 12 [2019-10-13 21:10:29,615 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001325904] [2019-10-13 21:10:29,617 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-13 21:10:29,617 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:29,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-13 21:10:29,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2019-10-13 21:10:29,618 INFO L87 Difference]: Start difference. First operand 698 states and 1089 transitions. Second operand 10 states.