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_product09.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:08:38,602 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:08:38,604 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:08:38,616 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:08:38,617 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:08:38,618 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:08:38,619 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:08:38,621 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:08:38,622 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:08:38,623 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:08:38,624 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:08:38,625 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:08:38,626 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:08:38,627 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:08:38,628 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:08:38,629 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:08:38,630 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:08:38,630 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:08:38,635 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:08:38,637 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:08:38,639 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:08:38,640 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:08:38,642 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:08:38,645 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:08:38,647 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 01:08:38,648 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 01:08:38,648 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 01:08:38,651 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 01:08:38,651 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 01:08:38,654 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 01:08:38,655 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 01:08:38,655 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 01:08:38,656 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 01:08:38,657 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 01:08:38,658 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 01:08:38,661 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 01:08:38,662 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 01:08:38,662 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 01:08:38,663 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:08:38,663 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:08:38,664 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:08:38,665 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 01:08:38,690 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:08:38,690 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:08:38,692 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:08:38,692 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:08:38,692 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:08:38,693 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:08:38,693 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:08:38,693 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:08:38,693 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:08:38,693 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:08:38,694 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:08:38,695 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:08:38,695 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:08:38,695 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:08:38,695 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:08:38,695 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:08:38,696 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:08:38,696 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:08:38,696 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:08:38,696 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:08:38,697 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:08:38,697 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:08:38,697 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:08:38,697 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:08:38,698 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:08:38,698 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:08:38,698 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:08:38,698 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:08:38,698 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-15 01:08:38,993 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:08:39,011 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:08:39,015 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:08:39,016 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:08:39,016 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:08:39,017 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec1_product09.cil.c [2019-10-15 01:08:39,102 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/73e0a2991/0ed239b58aa54317a14da91c3d8b70ab/FLAGdfe71bef5 [2019-10-15 01:08:39,766 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:08:39,767 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec1_product09.cil.c [2019-10-15 01:08:39,789 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/73e0a2991/0ed239b58aa54317a14da91c3d8b70ab/FLAGdfe71bef5 [2019-10-15 01:08:39,970 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/73e0a2991/0ed239b58aa54317a14da91c3d8b70ab [2019-10-15 01:08:39,980 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:08:39,981 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:08:39,982 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:08:39,983 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:08:39,986 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:08:39,987 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:08:39" (1/1) ... [2019-10-15 01:08:39,991 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1763af5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:39, skipping insertion in model container [2019-10-15 01:08:39,991 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:08:39" (1/1) ... [2019-10-15 01:08:39,999 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:08:40,083 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:08:40,838 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:08:40,854 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:08:40,993 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:08:41,052 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:08:41,053 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:41 WrapperNode [2019-10-15 01:08:41,053 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:08:41,054 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:08:41,054 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:08:41,054 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:08:41,069 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:41" (1/1) ... [2019-10-15 01:08:41,069 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:41" (1/1) ... [2019-10-15 01:08:41,105 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:41" (1/1) ... [2019-10-15 01:08:41,110 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:41" (1/1) ... [2019-10-15 01:08:41,163 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:41" (1/1) ... [2019-10-15 01:08:41,211 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:41" (1/1) ... [2019-10-15 01:08:41,232 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:41" (1/1) ... [2019-10-15 01:08:41,263 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:08:41,264 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:08:41,264 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:08:41,264 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:08:41,265 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:41" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:08:41,343 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:08:41,343 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:08:41,344 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-15 01:08:41,344 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-15 01:08:41,344 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-15 01:08:41,345 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-15 01:08:41,345 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-15 01:08:41,345 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-15 01:08:41,346 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-15 01:08:41,346 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-15 01:08:41,347 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-15 01:08:41,347 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-15 01:08:41,347 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-15 01:08:41,348 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-15 01:08:41,348 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-10-15 01:08:41,348 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-10-15 01:08:41,351 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-10-15 01:08:41,351 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-10-15 01:08:41,351 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-10-15 01:08:41,351 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-10-15 01:08:41,352 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-10-15 01:08:41,352 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-10-15 01:08:41,353 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-15 01:08:41,354 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-10-15 01:08:41,354 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-10-15 01:08:41,354 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-10-15 01:08:41,354 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-15 01:08:41,355 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-10-15 01:08:41,355 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-15 01:08:41,355 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-15 01:08:41,355 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:08:41,355 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2019-10-15 01:08:41,356 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__2 [2019-10-15 01:08:41,356 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__3 [2019-10-15 01:08:41,356 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__4 [2019-10-15 01:08:41,356 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-10-15 01:08:41,357 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-10-15 01:08:41,357 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-10-15 01:08:41,357 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-10-15 01:08:41,357 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-10-15 01:08:41,357 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-10-15 01:08:41,358 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-10-15 01:08:41,358 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-10-15 01:08:41,358 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-10-15 01:08:41,358 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-10-15 01:08:41,358 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-10-15 01:08:41,359 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-10-15 01:08:41,359 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-10-15 01:08:41,359 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-10-15 01:08:41,359 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-10-15 01:08:41,359 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-10-15 01:08:41,359 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-10-15 01:08:41,360 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-10-15 01:08:41,360 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-10-15 01:08:41,360 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-10-15 01:08:41,360 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-10-15 01:08:41,360 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-10-15 01:08:41,361 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-10-15 01:08:41,361 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-10-15 01:08:41,361 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-10-15 01:08:41,361 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-10-15 01:08:41,361 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-10-15 01:08:41,362 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-10-15 01:08:41,362 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-10-15 01:08:41,363 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-10-15 01:08:41,363 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-10-15 01:08:41,363 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-15 01:08:41,363 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-10-15 01:08:41,363 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-10-15 01:08:41,363 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-15 01:08:41,364 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-10-15 01:08:41,364 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-10-15 01:08:41,364 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-10-15 01:08:41,365 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:08:41,365 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:08:41,366 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-15 01:08:41,366 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-15 01:08:41,366 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-15 01:08:41,366 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-15 01:08:41,367 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-15 01:08:41,367 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-15 01:08:41,367 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-15 01:08:41,367 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:08:41,368 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-15 01:08:41,368 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-15 01:08:41,369 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:08:41,369 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-15 01:08:41,370 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-15 01:08:41,370 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:08:41,371 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-15 01:08:41,371 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-15 01:08:41,371 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:08:41,371 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-15 01:08:41,371 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-15 01:08:41,372 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-15 01:08:41,372 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-15 01:08:41,372 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-15 01:08:41,372 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:08:41,372 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-10-15 01:08:41,373 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-10-15 01:08:41,373 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-10-15 01:08:41,373 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-10-15 01:08:41,373 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-10-15 01:08:41,373 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-10-15 01:08:41,374 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-10-15 01:08:41,374 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-10-15 01:08:41,374 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-10-15 01:08:41,374 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-15 01:08:41,374 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-10-15 01:08:41,375 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-10-15 01:08:41,375 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-10-15 01:08:41,375 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-15 01:08:41,375 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-10-15 01:08:41,375 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-10-15 01:08:41,376 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-10-15 01:08:41,376 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-10-15 01:08:41,376 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-10-15 01:08:41,377 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-15 01:08:41,377 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-10-15 01:08:41,377 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-15 01:08:41,378 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2019-10-15 01:08:41,378 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__4 [2019-10-15 01:08:41,378 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-15 01:08:41,378 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-15 01:08:41,380 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:08:41,380 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-10-15 01:08:41,380 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-10-15 01:08:41,380 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__2 [2019-10-15 01:08:41,381 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__3 [2019-10-15 01:08:41,381 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-10-15 01:08:41,381 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-10-15 01:08:41,382 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-10-15 01:08:41,382 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-10-15 01:08:41,382 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-10-15 01:08:41,382 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-10-15 01:08:41,383 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-10-15 01:08:41,383 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-10-15 01:08:41,386 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-10-15 01:08:41,387 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-10-15 01:08:41,387 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-15 01:08:41,387 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-10-15 01:08:41,388 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-10-15 01:08:41,388 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-10-15 01:08:41,389 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-10-15 01:08:41,396 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-10-15 01:08:41,396 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-10-15 01:08:41,397 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-10-15 01:08:41,397 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-10-15 01:08:41,397 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-10-15 01:08:41,397 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-10-15 01:08:41,398 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-10-15 01:08:41,398 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-10-15 01:08:41,398 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-10-15 01:08:41,398 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-10-15 01:08:41,398 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-10-15 01:08:41,398 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-10-15 01:08:41,399 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-10-15 01:08:41,399 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-10-15 01:08:41,399 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:08:41,399 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-15 01:08:41,399 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:08:43,744 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:08:43,745 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-15 01:08:43,747 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:08:43 BoogieIcfgContainer [2019-10-15 01:08:43,747 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:08:43,749 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:08:43,749 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:08:43,752 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:08:43,753 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:08:39" (1/3) ... [2019-10-15 01:08:43,754 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64fb7ba6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:08:43, skipping insertion in model container [2019-10-15 01:08:43,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:41" (2/3) ... [2019-10-15 01:08:43,754 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64fb7ba6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:08:43, skipping insertion in model container [2019-10-15 01:08:43,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:08:43" (3/3) ... [2019-10-15 01:08:43,756 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product09.cil.c [2019-10-15 01:08:43,766 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:08:43,778 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:08:43,790 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:08:43,835 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:08:43,835 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:08:43,835 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:08:43,835 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:08:43,836 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:08:43,836 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:08:43,836 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:08:43,836 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:08:43,878 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states. [2019-10-15 01:08:43,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-10-15 01:08:43,910 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:43,912 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:08:43,915 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:43,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:43,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1329174793, now seen corresponding path program 1 times [2019-10-15 01:08:43,932 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:43,932 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906490327] [2019-10-15 01:08:43,933 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:43,933 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:43,933 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:44,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:44,531 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:08:44,532 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906490327] [2019-10-15 01:08:44,533 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331961797] [2019-10-15 01:08:44,533 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:45,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:45,458 INFO L256 TraceCheckSpWp]: Trace formula consists of 3175 conjuncts, 1 conjunts are in the unsatisfiable core [2019-10-15 01:08:45,476 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:45,515 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:08:45,516 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:45,751 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:08:45,752 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:08:45,752 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [4] total 4 [2019-10-15 01:08:45,753 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808156267] [2019-10-15 01:08:45,759 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-15 01:08:45,761 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:45,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-15 01:08:45,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:08:45,780 INFO L87 Difference]: Start difference. First operand 738 states. Second operand 2 states. [2019-10-15 01:08:45,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:45,853 INFO L93 Difference]: Finished difference Result 621 states and 997 transitions. [2019-10-15 01:08:45,854 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-15 01:08:45,855 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 138 [2019-10-15 01:08:45,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:45,892 INFO L225 Difference]: With dead ends: 621 [2019-10-15 01:08:45,892 INFO L226 Difference]: Without dead ends: 584 [2019-10-15 01:08:45,899 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 277 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:08:45,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2019-10-15 01:08:46,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 584. [2019-10-15 01:08:46,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 584 states. [2019-10-15 01:08:46,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 942 transitions. [2019-10-15 01:08:46,056 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 942 transitions. Word has length 138 [2019-10-15 01:08:46,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:46,065 INFO L462 AbstractCegarLoop]: Abstraction has 584 states and 942 transitions. [2019-10-15 01:08:46,066 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-15 01:08:46,067 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 942 transitions. [2019-10-15 01:08:46,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-10-15 01:08:46,090 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:46,091 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:08:46,291 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:46,292 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:46,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:46,292 INFO L82 PathProgramCache]: Analyzing trace with hash -1202691332, now seen corresponding path program 1 times [2019-10-15 01:08:46,293 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:46,293 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460992891] [2019-10-15 01:08:46,293 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:46,294 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:46,294 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:46,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:46,707 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:08:46,710 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460992891] [2019-10-15 01:08:46,710 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099260489] [2019-10-15 01:08:46,710 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:47,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:47,293 INFO L256 TraceCheckSpWp]: Trace formula consists of 3178 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:08:47,308 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:47,363 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:08:47,363 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:47,658 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:08:47,658 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:08:47,659 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-15 01:08:47,659 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592756337] [2019-10-15 01:08:47,660 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:08:47,660 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:47,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:08:47,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:08:47,661 INFO L87 Difference]: Start difference. First operand 584 states and 942 transitions. Second operand 4 states. [2019-10-15 01:08:47,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:47,793 INFO L93 Difference]: Finished difference Result 1140 states and 1857 transitions. [2019-10-15 01:08:47,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:08:47,794 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 140 [2019-10-15 01:08:47,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:47,802 INFO L225 Difference]: With dead ends: 1140 [2019-10-15 01:08:47,802 INFO L226 Difference]: Without dead ends: 584 [2019-10-15 01:08:47,811 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 276 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:08:47,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2019-10-15 01:08:47,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 584. [2019-10-15 01:08:47,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 584 states. [2019-10-15 01:08:47,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 941 transitions. [2019-10-15 01:08:47,848 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 941 transitions. Word has length 140 [2019-10-15 01:08:47,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:47,848 INFO L462 AbstractCegarLoop]: Abstraction has 584 states and 941 transitions. [2019-10-15 01:08:47,848 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:08:47,849 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 941 transitions. [2019-10-15 01:08:47,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-10-15 01:08:47,855 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:47,855 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:08:48,063 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:48,063 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:48,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:48,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1148939338, now seen corresponding path program 1 times [2019-10-15 01:08:48,064 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:48,064 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213175610] [2019-10-15 01:08:48,065 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:48,065 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:48,065 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:48,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:48,260 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:08:48,261 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213175610] [2019-10-15 01:08:48,261 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676375664] [2019-10-15 01:08:48,261 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:48,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:48,877 INFO L256 TraceCheckSpWp]: Trace formula consists of 3180 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:08:48,883 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:48,922 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:08:48,923 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:49,157 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:08:49,158 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:08:49,158 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-15 01:08:49,158 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321610676] [2019-10-15 01:08:49,161 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:08:49,162 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:49,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:08:49,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:08:49,163 INFO L87 Difference]: Start difference. First operand 584 states and 941 transitions. Second operand 4 states. [2019-10-15 01:08:49,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:49,243 INFO L93 Difference]: Finished difference Result 1140 states and 1855 transitions. [2019-10-15 01:08:49,244 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:08:49,244 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 142 [2019-10-15 01:08:49,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:49,249 INFO L225 Difference]: With dead ends: 1140 [2019-10-15 01:08:49,249 INFO L226 Difference]: Without dead ends: 584 [2019-10-15 01:08:49,252 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 280 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:08:49,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2019-10-15 01:08:49,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 584. [2019-10-15 01:08:49,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 584 states. [2019-10-15 01:08:49,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 940 transitions. [2019-10-15 01:08:49,276 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 940 transitions. Word has length 142 [2019-10-15 01:08:49,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:49,276 INFO L462 AbstractCegarLoop]: Abstraction has 584 states and 940 transitions. [2019-10-15 01:08:49,276 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:08:49,276 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 940 transitions. [2019-10-15 01:08:49,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-10-15 01:08:49,281 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:49,281 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:08:49,489 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:49,490 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:49,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:49,491 INFO L82 PathProgramCache]: Analyzing trace with hash -333550332, now seen corresponding path program 1 times [2019-10-15 01:08:49,491 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:49,492 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156690405] [2019-10-15 01:08:49,492 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:49,492 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:49,493 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:49,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:49,634 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:08:49,634 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156690405] [2019-10-15 01:08:49,635 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471482317] [2019-10-15 01:08:49,635 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:50,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:50,261 INFO L256 TraceCheckSpWp]: Trace formula consists of 3182 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:08:50,268 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:50,301 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:08:50,301 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:50,518 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:08:50,518 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:08:50,519 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-15 01:08:50,519 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903580304] [2019-10-15 01:08:50,519 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:08:50,520 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:50,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:08:50,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:08:50,520 INFO L87 Difference]: Start difference. First operand 584 states and 940 transitions. Second operand 4 states. [2019-10-15 01:08:50,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:50,593 INFO L93 Difference]: Finished difference Result 1147 states and 1862 transitions. [2019-10-15 01:08:50,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:08:50,594 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 144 [2019-10-15 01:08:50,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:50,598 INFO L225 Difference]: With dead ends: 1147 [2019-10-15 01:08:50,598 INFO L226 Difference]: Without dead ends: 593 [2019-10-15 01:08:50,600 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 284 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:08:50,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2019-10-15 01:08:50,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 593. [2019-10-15 01:08:50,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 593 states. [2019-10-15 01:08:50,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 952 transitions. [2019-10-15 01:08:50,622 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 952 transitions. Word has length 144 [2019-10-15 01:08:50,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:50,622 INFO L462 AbstractCegarLoop]: Abstraction has 593 states and 952 transitions. [2019-10-15 01:08:50,622 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:08:50,622 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 952 transitions. [2019-10-15 01:08:50,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-10-15 01:08:50,626 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:50,627 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:08:50,838 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:50,838 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:50,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:50,839 INFO L82 PathProgramCache]: Analyzing trace with hash 2025668661, now seen corresponding path program 1 times [2019-10-15 01:08:50,839 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:50,839 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758253778] [2019-10-15 01:08:50,839 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:50,839 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:50,839 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:50,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:50,970 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:08:50,970 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758253778] [2019-10-15 01:08:50,970 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473308770] [2019-10-15 01:08:50,971 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:51,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:51,607 INFO L256 TraceCheckSpWp]: Trace formula consists of 3183 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:08:51,612 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:51,670 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:08:51,671 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:51,907 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:08:51,907 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:08:51,907 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-15 01:08:51,907 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394209590] [2019-10-15 01:08:51,908 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:08:51,908 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:51,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:08:51,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:08:51,909 INFO L87 Difference]: Start difference. First operand 593 states and 952 transitions. Second operand 4 states. [2019-10-15 01:08:52,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:52,004 INFO L93 Difference]: Finished difference Result 1149 states and 1863 transitions. [2019-10-15 01:08:52,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:08:52,005 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 145 [2019-10-15 01:08:52,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:52,010 INFO L225 Difference]: With dead ends: 1149 [2019-10-15 01:08:52,010 INFO L226 Difference]: Without dead ends: 593 [2019-10-15 01:08:52,013 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 286 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:08:52,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2019-10-15 01:08:52,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 593. [2019-10-15 01:08:52,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 593 states. [2019-10-15 01:08:52,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 951 transitions. [2019-10-15 01:08:52,034 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 951 transitions. Word has length 145 [2019-10-15 01:08:52,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:52,035 INFO L462 AbstractCegarLoop]: Abstraction has 593 states and 951 transitions. [2019-10-15 01:08:52,035 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:08:52,035 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 951 transitions. [2019-10-15 01:08:52,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-10-15 01:08:52,039 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:52,039 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:08:52,257 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:52,258 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:52,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:52,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1147712472, now seen corresponding path program 1 times [2019-10-15 01:08:52,258 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:52,259 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041317787] [2019-10-15 01:08:52,259 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:52,259 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:52,259 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:52,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:52,381 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:08:52,382 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041317787] [2019-10-15 01:08:52,382 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078781566] [2019-10-15 01:08:52,382 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:53,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:53,023 INFO L256 TraceCheckSpWp]: Trace formula consists of 3184 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:08:53,028 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:53,055 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:08:53,056 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:53,297 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:08:53,297 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:08:53,298 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-15 01:08:53,298 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146235357] [2019-10-15 01:08:53,299 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:08:53,299 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:53,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:08:53,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:08:53,300 INFO L87 Difference]: Start difference. First operand 593 states and 951 transitions. Second operand 4 states. [2019-10-15 01:08:53,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:53,380 INFO L93 Difference]: Finished difference Result 1149 states and 1862 transitions. [2019-10-15 01:08:53,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:08:53,381 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 146 [2019-10-15 01:08:53,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:53,386 INFO L225 Difference]: With dead ends: 1149 [2019-10-15 01:08:53,386 INFO L226 Difference]: Without dead ends: 593 [2019-10-15 01:08:53,389 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 288 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:08:53,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2019-10-15 01:08:53,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 593. [2019-10-15 01:08:53,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 593 states. [2019-10-15 01:08:53,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 950 transitions. [2019-10-15 01:08:53,412 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 950 transitions. Word has length 146 [2019-10-15 01:08:53,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:53,412 INFO L462 AbstractCegarLoop]: Abstraction has 593 states and 950 transitions. [2019-10-15 01:08:53,412 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:08:53,413 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 950 transitions. [2019-10-15 01:08:53,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-10-15 01:08:53,417 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:53,418 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:08:53,634 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:53,635 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:53,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:53,635 INFO L82 PathProgramCache]: Analyzing trace with hash 261961625, now seen corresponding path program 1 times [2019-10-15 01:08:53,635 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:53,635 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536253143] [2019-10-15 01:08:53,636 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:53,636 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:53,636 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:53,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:53,859 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 01:08:53,860 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536253143] [2019-10-15 01:08:53,860 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915555671] [2019-10-15 01:08:53,860 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:54,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:54,873 INFO L256 TraceCheckSpWp]: Trace formula consists of 3185 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:08:54,877 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:54,956 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:08:54,956 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:55,348 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 01:08:55,348 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:08:55,349 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10, 7] total 16 [2019-10-15 01:08:55,349 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216870597] [2019-10-15 01:08:55,350 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-15 01:08:55,350 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:55,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-15 01:08:55,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2019-10-15 01:08:55,351 INFO L87 Difference]: Start difference. First operand 593 states and 950 transitions. Second operand 7 states. [2019-10-15 01:08:55,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:55,504 INFO L93 Difference]: Finished difference Result 1156 states and 1871 transitions. [2019-10-15 01:08:55,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:08:55,504 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 147 [2019-10-15 01:08:55,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:55,509 INFO L225 Difference]: With dead ends: 1156 [2019-10-15 01:08:55,509 INFO L226 Difference]: Without dead ends: 604 [2019-10-15 01:08:55,512 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 286 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2019-10-15 01:08:55,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2019-10-15 01:08:55,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 600. [2019-10-15 01:08:55,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 600 states. [2019-10-15 01:08:55,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 960 transitions. [2019-10-15 01:08:55,535 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 960 transitions. Word has length 147 [2019-10-15 01:08:55,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:55,535 INFO L462 AbstractCegarLoop]: Abstraction has 600 states and 960 transitions. [2019-10-15 01:08:55,535 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-15 01:08:55,535 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 960 transitions. [2019-10-15 01:08:55,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2019-10-15 01:08:55,539 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:55,540 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:08:55,755 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:55,756 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:55,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:55,757 INFO L82 PathProgramCache]: Analyzing trace with hash -654338191, now seen corresponding path program 1 times [2019-10-15 01:08:55,757 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:55,758 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158276955] [2019-10-15 01:08:55,758 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:55,758 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:55,758 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:55,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:55,890 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-15 01:08:55,891 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158276955] [2019-10-15 01:08:55,895 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88900629] [2019-10-15 01:08:55,896 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:56,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:56,578 INFO L256 TraceCheckSpWp]: Trace formula consists of 3186 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:08:56,584 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:56,621 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:08:56,622 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:56,857 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:08:56,857 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:08:56,857 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 10 [2019-10-15 01:08:56,857 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695486058] [2019-10-15 01:08:56,859 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:08:56,859 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:56,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:08:56,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-10-15 01:08:56,868 INFO L87 Difference]: Start difference. First operand 600 states and 960 transitions. Second operand 4 states. [2019-10-15 01:08:57,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:57,031 INFO L93 Difference]: Finished difference Result 1161 states and 1882 transitions. [2019-10-15 01:08:57,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:08:57,032 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 148 [2019-10-15 01:08:57,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:57,036 INFO L225 Difference]: With dead ends: 1161 [2019-10-15 01:08:57,037 INFO L226 Difference]: Without dead ends: 600 [2019-10-15 01:08:57,040 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 293 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2019-10-15 01:08:57,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2019-10-15 01:08:57,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 600. [2019-10-15 01:08:57,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 600 states. [2019-10-15 01:08:57,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 955 transitions. [2019-10-15 01:08:57,062 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 955 transitions. Word has length 148 [2019-10-15 01:08:57,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:57,063 INFO L462 AbstractCegarLoop]: Abstraction has 600 states and 955 transitions. [2019-10-15 01:08:57,063 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:08:57,063 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 955 transitions. [2019-10-15 01:08:57,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-10-15 01:08:57,067 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:57,067 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:08:57,275 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:57,275 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:57,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:57,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1377855302, now seen corresponding path program 1 times [2019-10-15 01:08:57,276 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:57,276 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63162192] [2019-10-15 01:08:57,277 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:57,277 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:57,277 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:57,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:57,397 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:08:57,398 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63162192] [2019-10-15 01:08:57,398 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065948272] [2019-10-15 01:08:57,398 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:58,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:58,169 INFO L256 TraceCheckSpWp]: Trace formula consists of 3187 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:08:58,180 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:58,277 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:08:58,278 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:58,720 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 01:08:58,720 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:08:58,720 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4, 7] total 10 [2019-10-15 01:08:58,721 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406868876] [2019-10-15 01:08:58,721 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-15 01:08:58,721 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:58,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-15 01:08:58,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-10-15 01:08:58,722 INFO L87 Difference]: Start difference. First operand 600 states and 955 transitions. Second operand 7 states. [2019-10-15 01:08:58,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:58,852 INFO L93 Difference]: Finished difference Result 1162 states and 1870 transitions. [2019-10-15 01:08:58,852 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:08:58,852 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 150 [2019-10-15 01:08:58,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:58,858 INFO L225 Difference]: With dead ends: 1162 [2019-10-15 01:08:58,858 INFO L226 Difference]: Without dead ends: 607 [2019-10-15 01:08:58,861 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 290 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2019-10-15 01:08:58,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2019-10-15 01:08:58,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 603. [2019-10-15 01:08:58,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 603 states. [2019-10-15 01:08:58,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 960 transitions. [2019-10-15 01:08:58,884 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 960 transitions. Word has length 150 [2019-10-15 01:08:58,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:58,885 INFO L462 AbstractCegarLoop]: Abstraction has 603 states and 960 transitions. [2019-10-15 01:08:58,885 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-15 01:08:58,885 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 960 transitions. [2019-10-15 01:08:58,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-10-15 01:08:58,889 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:58,889 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:08:59,098 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:59,099 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:59,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:59,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1770571481, now seen corresponding path program 1 times [2019-10-15 01:08:59,100 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:59,100 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026065359] [2019-10-15 01:08:59,100 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:59,101 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:59,101 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:59,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:59,308 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-15 01:08:59,308 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026065359] [2019-10-15 01:08:59,308 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533973726] [2019-10-15 01:08:59,309 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:00,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:00,120 INFO L256 TraceCheckSpWp]: Trace formula consists of 3188 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:00,133 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:00,184 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:09:00,185 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:00,407 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:09:00,408 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:00,408 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 10 [2019-10-15 01:09:00,408 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455084576] [2019-10-15 01:09:00,411 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:00,412 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:00,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:00,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-10-15 01:09:00,412 INFO L87 Difference]: Start difference. First operand 603 states and 960 transitions. Second operand 4 states. [2019-10-15 01:09:00,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:00,605 INFO L93 Difference]: Finished difference Result 1167 states and 1880 transitions. [2019-10-15 01:09:00,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:09:00,606 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 150 [2019-10-15 01:09:00,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:00,612 INFO L225 Difference]: With dead ends: 1167 [2019-10-15 01:09:00,613 INFO L226 Difference]: Without dead ends: 603 [2019-10-15 01:09:00,616 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 297 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2019-10-15 01:09:00,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2019-10-15 01:09:00,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 603. [2019-10-15 01:09:00,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 603 states. [2019-10-15 01:09:00,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 955 transitions. [2019-10-15 01:09:00,647 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 955 transitions. Word has length 150 [2019-10-15 01:09:00,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:00,648 INFO L462 AbstractCegarLoop]: Abstraction has 603 states and 955 transitions. [2019-10-15 01:09:00,648 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:00,648 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 955 transitions. [2019-10-15 01:09:00,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-10-15 01:09:00,655 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:00,655 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:00,866 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:00,866 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:00,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:00,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1535082471, now seen corresponding path program 1 times [2019-10-15 01:09:00,867 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:00,867 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206888272] [2019-10-15 01:09:00,868 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:00,868 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:00,868 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:00,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:01,019 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-15 01:09:01,019 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206888272] [2019-10-15 01:09:01,020 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211431173] [2019-10-15 01:09:01,020 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:01,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:01,901 INFO L256 TraceCheckSpWp]: Trace formula consists of 3190 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:01,907 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:01,946 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:09:01,947 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:02,169 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:09:02,170 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:02,171 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 10 [2019-10-15 01:09:02,171 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650385346] [2019-10-15 01:09:02,172 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:02,172 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:02,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:02,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-10-15 01:09:02,173 INFO L87 Difference]: Start difference. First operand 603 states and 955 transitions. Second operand 4 states. [2019-10-15 01:09:02,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:02,396 INFO L93 Difference]: Finished difference Result 1206 states and 1931 transitions. [2019-10-15 01:09:02,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:09:02,397 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 152 [2019-10-15 01:09:02,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:02,403 INFO L225 Difference]: With dead ends: 1206 [2019-10-15 01:09:02,403 INFO L226 Difference]: Without dead ends: 648 [2019-10-15 01:09:02,407 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 301 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2019-10-15 01:09:02,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2019-10-15 01:09:02,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 642. [2019-10-15 01:09:02,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 642 states. [2019-10-15 01:09:02,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 1017 transitions. [2019-10-15 01:09:02,439 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 1017 transitions. Word has length 152 [2019-10-15 01:09:02,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:02,440 INFO L462 AbstractCegarLoop]: Abstraction has 642 states and 1017 transitions. [2019-10-15 01:09:02,440 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:02,440 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 1017 transitions. [2019-10-15 01:09:02,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-10-15 01:09:02,445 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:02,445 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:02,654 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:02,654 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:02,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:02,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1523822727, now seen corresponding path program 1 times [2019-10-15 01:09:02,655 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:02,660 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403627632] [2019-10-15 01:09:02,660 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:02,660 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:02,660 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:02,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:02,768 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-15 01:09:02,768 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403627632] [2019-10-15 01:09:02,769 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113047820] [2019-10-15 01:09:02,769 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:03,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:03,434 INFO L256 TraceCheckSpWp]: Trace formula consists of 3189 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:03,440 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:03,476 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:09:03,477 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:03,832 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:09:03,832 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:03,833 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-15 01:09:03,833 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346874853] [2019-10-15 01:09:03,834 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:03,834 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:03,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:03,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:09:03,835 INFO L87 Difference]: Start difference. First operand 642 states and 1017 transitions. Second operand 4 states. [2019-10-15 01:09:04,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:04,005 INFO L93 Difference]: Finished difference Result 1200 states and 1921 transitions. [2019-10-15 01:09:04,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:09:04,006 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 152 [2019-10-15 01:09:04,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:04,013 INFO L225 Difference]: With dead ends: 1200 [2019-10-15 01:09:04,013 INFO L226 Difference]: Without dead ends: 642 [2019-10-15 01:09:04,016 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 300 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:09:04,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2019-10-15 01:09:04,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 642. [2019-10-15 01:09:04,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 642 states. [2019-10-15 01:09:04,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 1012 transitions. [2019-10-15 01:09:04,050 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 1012 transitions. Word has length 152 [2019-10-15 01:09:04,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:04,051 INFO L462 AbstractCegarLoop]: Abstraction has 642 states and 1012 transitions. [2019-10-15 01:09:04,051 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:04,051 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 1012 transitions. [2019-10-15 01:09:04,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-10-15 01:09:04,058 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:04,058 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:04,274 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:04,274 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:04,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:04,275 INFO L82 PathProgramCache]: Analyzing trace with hash 819565415, now seen corresponding path program 1 times [2019-10-15 01:09:04,275 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:04,275 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091943157] [2019-10-15 01:09:04,275 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:04,275 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:04,275 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:04,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:04,403 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 01:09:04,403 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091943157] [2019-10-15 01:09:04,404 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626201658] [2019-10-15 01:09:04,404 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:05,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:05,100 INFO L256 TraceCheckSpWp]: Trace formula consists of 3186 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-15 01:09:05,105 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:05,207 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:09:05,208 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:05,582 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:09:05,683 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:09:05,683 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:05,683 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 9] total 16 [2019-10-15 01:09:05,684 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472488899] [2019-10-15 01:09:05,684 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-15 01:09:05,684 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:05,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-15 01:09:05,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2019-10-15 01:09:05,685 INFO L87 Difference]: Start difference. First operand 642 states and 1012 transitions. Second operand 9 states. [2019-10-15 01:09:05,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:05,909 INFO L93 Difference]: Finished difference Result 1207 states and 1927 transitions. [2019-10-15 01:09:05,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-15 01:09:05,909 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 152 [2019-10-15 01:09:05,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:05,915 INFO L225 Difference]: With dead ends: 1207 [2019-10-15 01:09:05,915 INFO L226 Difference]: Without dead ends: 653 [2019-10-15 01:09:05,919 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 289 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2019-10-15 01:09:05,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2019-10-15 01:09:05,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 644. [2019-10-15 01:09:05,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 644 states. [2019-10-15 01:09:05,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 1016 transitions. [2019-10-15 01:09:05,963 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 1016 transitions. Word has length 152 [2019-10-15 01:09:05,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:05,963 INFO L462 AbstractCegarLoop]: Abstraction has 644 states and 1016 transitions. [2019-10-15 01:09:05,963 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-15 01:09:05,963 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 1016 transitions. [2019-10-15 01:09:05,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-10-15 01:09:05,973 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:05,974 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:06,184 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:06,184 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:06,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:06,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1494239802, now seen corresponding path program 1 times [2019-10-15 01:09:06,185 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:06,185 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663841464] [2019-10-15 01:09:06,185 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:06,185 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:06,186 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:06,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:06,307 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:09:06,308 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663841464] [2019-10-15 01:09:06,308 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224619383] [2019-10-15 01:09:06,308 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:07,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:07,062 INFO L256 TraceCheckSpWp]: Trace formula consists of 3185 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:09:07,066 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:07,121 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 01:09:07,121 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:07,460 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 01:09:07,460 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:09:07,460 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 13 [2019-10-15 01:09:07,460 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503731944] [2019-10-15 01:09:07,461 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-15 01:09:07,461 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:07,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-15 01:09:07,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2019-10-15 01:09:07,462 INFO L87 Difference]: Start difference. First operand 644 states and 1016 transitions. Second operand 11 states. [2019-10-15 01:09:07,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:07,614 INFO L93 Difference]: Finished difference Result 1141 states and 1824 transitions. [2019-10-15 01:09:07,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-15 01:09:07,615 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 152 [2019-10-15 01:09:07,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:07,619 INFO L225 Difference]: With dead ends: 1141 [2019-10-15 01:09:07,620 INFO L226 Difference]: Without dead ends: 661 [2019-10-15 01:09:07,623 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 295 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2019-10-15 01:09:07,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2019-10-15 01:09:07,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 651. [2019-10-15 01:09:07,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 651 states. [2019-10-15 01:09:07,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 1026 transitions. [2019-10-15 01:09:07,646 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 1026 transitions. Word has length 152 [2019-10-15 01:09:07,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:07,647 INFO L462 AbstractCegarLoop]: Abstraction has 651 states and 1026 transitions. [2019-10-15 01:09:07,647 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-15 01:09:07,647 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 1026 transitions. [2019-10-15 01:09:07,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-10-15 01:09:07,651 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:07,651 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:07,859 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:07,860 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:07,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:07,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1825629817, now seen corresponding path program 1 times [2019-10-15 01:09:07,861 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:07,861 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282633409] [2019-10-15 01:09:07,861 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:07,861 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:07,862 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:07,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:07,973 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:09:07,974 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282633409] [2019-10-15 01:09:07,974 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150204324] [2019-10-15 01:09:07,974 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:08,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:08,723 INFO L256 TraceCheckSpWp]: Trace formula consists of 3191 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:08,732 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:08,761 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:09:08,761 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:08,970 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:09:08,970 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:08,970 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-15 01:09:08,970 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208519804] [2019-10-15 01:09:08,971 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:08,971 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:08,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:08,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:09:08,972 INFO L87 Difference]: Start difference. First operand 651 states and 1026 transitions. Second operand 4 states. [2019-10-15 01:09:09,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:09,142 INFO L93 Difference]: Finished difference Result 1218 states and 1943 transitions. [2019-10-15 01:09:09,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:09:09,142 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 154 [2019-10-15 01:09:09,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:09,147 INFO L225 Difference]: With dead ends: 1218 [2019-10-15 01:09:09,147 INFO L226 Difference]: Without dead ends: 651 [2019-10-15 01:09:09,152 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 304 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:09:09,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2019-10-15 01:09:09,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 651. [2019-10-15 01:09:09,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 651 states. [2019-10-15 01:09:09,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 1021 transitions. [2019-10-15 01:09:09,189 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 1021 transitions. Word has length 154 [2019-10-15 01:09:09,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:09,189 INFO L462 AbstractCegarLoop]: Abstraction has 651 states and 1021 transitions. [2019-10-15 01:09:09,189 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:09,190 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 1021 transitions. [2019-10-15 01:09:09,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2019-10-15 01:09:09,194 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:09,194 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:09,402 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:09,403 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:09,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:09,404 INFO L82 PathProgramCache]: Analyzing trace with hash 2084092048, now seen corresponding path program 1 times [2019-10-15 01:09:09,404 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:09,404 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092826462] [2019-10-15 01:09:09,405 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:09,405 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:09,405 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:09,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:09,540 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:09:09,541 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092826462] [2019-10-15 01:09:09,541 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332246472] [2019-10-15 01:09:09,541 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:10,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:10,349 INFO L256 TraceCheckSpWp]: Trace formula consists of 3192 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:09:10,354 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:10,417 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 01:09:10,417 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:10,721 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 01:09:10,722 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:09:10,722 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 10 [2019-10-15 01:09:10,722 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766944092] [2019-10-15 01:09:10,722 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-15 01:09:10,723 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:10,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-15 01:09:10,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-10-15 01:09:10,723 INFO L87 Difference]: Start difference. First operand 651 states and 1021 transitions. Second operand 8 states. [2019-10-15 01:09:10,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:10,837 INFO L93 Difference]: Finished difference Result 1145 states and 1826 transitions. [2019-10-15 01:09:10,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:09:10,838 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 155 [2019-10-15 01:09:10,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:10,842 INFO L225 Difference]: With dead ends: 1145 [2019-10-15 01:09:10,842 INFO L226 Difference]: Without dead ends: 665 [2019-10-15 01:09:10,846 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 301 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2019-10-15 01:09:10,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2019-10-15 01:09:10,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 658. [2019-10-15 01:09:10,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 658 states. [2019-10-15 01:09:10,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 1032 transitions. [2019-10-15 01:09:10,872 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 1032 transitions. Word has length 155 [2019-10-15 01:09:10,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:10,873 INFO L462 AbstractCegarLoop]: Abstraction has 658 states and 1032 transitions. [2019-10-15 01:09:10,873 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-15 01:09:10,873 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 1032 transitions. [2019-10-15 01:09:10,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-10-15 01:09:10,878 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:10,878 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:11,086 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:11,086 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:11,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:11,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1252866708, now seen corresponding path program 1 times [2019-10-15 01:09:11,087 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:11,087 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419575193] [2019-10-15 01:09:11,088 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:11,088 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:11,088 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:11,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:11,201 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:09:11,202 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419575193] [2019-10-15 01:09:11,202 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336711909] [2019-10-15 01:09:11,202 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:11,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:11,959 INFO L256 TraceCheckSpWp]: Trace formula consists of 3182 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-15 01:09:11,963 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:12,047 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:09:12,048 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:12,499 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:09:12,635 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:09:12,635 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:09:12,636 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [4] total 16 [2019-10-15 01:09:12,636 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938716331] [2019-10-15 01:09:12,638 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-15 01:09:12,638 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:12,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-15 01:09:12,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2019-10-15 01:09:12,639 INFO L87 Difference]: Start difference. First operand 658 states and 1032 transitions. Second operand 14 states.