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-f4eb214f-m [2019-10-13 21:09:34,494 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 21:09:34,497 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 21:09:34,515 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 21:09:34,516 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 21:09:34,518 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 21:09:34,520 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 21:09:34,529 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 21:09:34,533 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 21:09:34,539 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 21:09:34,540 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 21:09:34,542 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 21:09:34,542 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 21:09:34,544 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 21:09:34,546 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 21:09:34,548 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 21:09:34,549 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 21:09:34,550 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 21:09:34,552 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 21:09:34,556 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 21:09:34,561 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 21:09:34,564 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 21:09:34,567 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 21:09:34,568 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 21:09:34,570 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 21:09:34,570 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 21:09:34,570 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 21:09:34,572 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 21:09:34,574 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 21:09:34,575 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 21:09:34,575 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 21:09:34,577 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 21:09:34,578 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 21:09:34,578 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 21:09:34,580 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 21:09:34,580 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 21:09:34,581 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 21:09:34,581 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 21:09:34,581 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 21:09:34,582 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 21:09:34,583 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 21:09:34,584 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 21:09:34,616 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 21:09:34,616 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 21:09:34,620 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 21:09:34,621 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 21:09:34,621 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 21:09:34,621 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 21:09:34,621 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 21:09:34,621 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 21:09:34,622 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 21:09:34,622 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 21:09:34,622 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 21:09:34,622 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 21:09:34,622 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 21:09:34,623 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 21:09:34,623 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 21:09:34,623 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 21:09:34,627 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 21:09:34,627 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 21:09:34,628 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 21:09:34,628 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 21:09:34,628 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 21:09:34,628 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:09:34,628 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 21:09:34,629 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 21:09:34,629 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 21:09:34,630 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 21:09:34,630 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 21:09:34,630 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 21:09:34,630 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-13 21:09:34,924 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 21:09:34,950 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 21:09:34,953 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 21:09:34,955 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 21:09:34,955 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 21:09:34,956 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec1_product09.cil.c [2019-10-13 21:09:35,026 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53baddbbe/f8ffe74cb41d4235b103514f0ea52e47/FLAG9ba9dd8e9 [2019-10-13 21:09:35,706 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 21:09:35,706 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec1_product09.cil.c [2019-10-13 21:09:35,736 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53baddbbe/f8ffe74cb41d4235b103514f0ea52e47/FLAG9ba9dd8e9 [2019-10-13 21:09:35,868 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53baddbbe/f8ffe74cb41d4235b103514f0ea52e47 [2019-10-13 21:09:35,880 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 21:09:35,881 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 21:09:35,882 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 21:09:35,883 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 21:09:35,887 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 21:09:35,888 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:09:35" (1/1) ... [2019-10-13 21:09:35,891 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60aa197e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:35, skipping insertion in model container [2019-10-13 21:09:35,891 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:09:35" (1/1) ... [2019-10-13 21:09:35,899 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 21:09:35,985 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 21:09:36,737 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:09:36,758 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 21:09:36,871 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:09:36,940 INFO L192 MainTranslator]: Completed translation [2019-10-13 21:09:36,941 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:36 WrapperNode [2019-10-13 21:09:36,941 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 21:09:36,942 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 21:09:36,942 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 21:09:36,942 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 21:09:36,956 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:36" (1/1) ... [2019-10-13 21:09:36,956 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:36" (1/1) ... [2019-10-13 21:09:36,986 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:36" (1/1) ... [2019-10-13 21:09:36,987 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:36" (1/1) ... [2019-10-13 21:09:37,044 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:36" (1/1) ... [2019-10-13 21:09:37,080 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:36" (1/1) ... [2019-10-13 21:09:37,091 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:36" (1/1) ... [2019-10-13 21:09:37,127 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 21:09:37,128 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 21:09:37,128 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 21:09:37,128 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 21:09:37,134 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:36" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:09:37,210 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 21:09:37,210 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 21:09:37,211 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-13 21:09:37,211 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-13 21:09:37,211 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-13 21:09:37,212 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-13 21:09:37,212 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-13 21:09:37,213 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-13 21:09:37,213 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-13 21:09:37,214 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-13 21:09:37,214 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-13 21:09:37,214 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-13 21:09:37,214 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-13 21:09:37,215 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-13 21:09:37,216 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-10-13 21:09:37,216 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-10-13 21:09:37,218 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-10-13 21:09:37,218 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-10-13 21:09:37,219 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-10-13 21:09:37,219 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-10-13 21:09:37,219 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-10-13 21:09:37,220 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-10-13 21:09:37,220 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-13 21:09:37,220 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-10-13 21:09:37,220 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-10-13 21:09:37,220 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-10-13 21:09:37,221 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-13 21:09:37,221 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-10-13 21:09:37,221 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-13 21:09:37,221 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-13 21:09:37,221 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 21:09:37,222 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2019-10-13 21:09:37,222 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__2 [2019-10-13 21:09:37,222 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__3 [2019-10-13 21:09:37,222 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__4 [2019-10-13 21:09:37,222 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-10-13 21:09:37,223 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-10-13 21:09:37,223 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-10-13 21:09:37,223 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-10-13 21:09:37,223 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-10-13 21:09:37,224 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-10-13 21:09:37,224 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-10-13 21:09:37,224 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-10-13 21:09:37,224 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-10-13 21:09:37,224 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-10-13 21:09:37,224 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-10-13 21:09:37,225 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-10-13 21:09:37,225 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-10-13 21:09:37,226 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-10-13 21:09:37,226 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-10-13 21:09:37,226 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-10-13 21:09:37,226 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-10-13 21:09:37,226 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-10-13 21:09:37,226 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-10-13 21:09:37,227 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-10-13 21:09:37,227 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-10-13 21:09:37,227 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-10-13 21:09:37,227 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-10-13 21:09:37,227 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-10-13 21:09:37,228 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-10-13 21:09:37,228 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-10-13 21:09:37,228 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-10-13 21:09:37,228 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-10-13 21:09:37,229 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-10-13 21:09:37,229 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-10-13 21:09:37,229 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-10-13 21:09:37,229 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-13 21:09:37,229 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-10-13 21:09:37,229 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-10-13 21:09:37,230 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-13 21:09:37,230 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-10-13 21:09:37,230 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-10-13 21:09:37,230 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-10-13 21:09:37,231 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 21:09:37,231 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 21:09:37,231 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-13 21:09:37,232 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-13 21:09:37,232 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-13 21:09:37,232 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-13 21:09:37,233 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-13 21:09:37,233 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-13 21:09:37,233 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-13 21:09:37,233 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 21:09:37,234 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-13 21:09:37,234 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-13 21:09:37,235 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 21:09:37,235 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-13 21:09:37,236 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-13 21:09:37,236 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 21:09:37,236 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-13 21:09:37,236 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-13 21:09:37,236 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 21:09:37,237 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-13 21:09:37,237 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-13 21:09:37,237 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-13 21:09:37,237 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-13 21:09:37,237 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-13 21:09:37,237 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 21:09:37,238 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-10-13 21:09:37,238 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-10-13 21:09:37,238 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-10-13 21:09:37,238 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-10-13 21:09:37,238 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-10-13 21:09:37,238 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-10-13 21:09:37,239 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-10-13 21:09:37,239 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-10-13 21:09:37,239 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-10-13 21:09:37,239 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-13 21:09:37,239 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-10-13 21:09:37,239 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-10-13 21:09:37,240 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-10-13 21:09:37,240 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-13 21:09:37,240 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-10-13 21:09:37,240 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-10-13 21:09:37,240 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-10-13 21:09:37,241 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-10-13 21:09:37,241 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-10-13 21:09:37,241 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-13 21:09:37,242 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-10-13 21:09:37,242 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-13 21:09:37,242 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2019-10-13 21:09:37,242 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__4 [2019-10-13 21:09:37,243 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-13 21:09:37,243 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-13 21:09:37,244 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 21:09:37,245 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-10-13 21:09:37,245 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-10-13 21:09:37,245 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__2 [2019-10-13 21:09:37,245 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__3 [2019-10-13 21:09:37,245 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-10-13 21:09:37,245 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-10-13 21:09:37,246 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-10-13 21:09:37,246 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-10-13 21:09:37,246 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-10-13 21:09:37,247 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-10-13 21:09:37,247 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-10-13 21:09:37,248 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-10-13 21:09:37,251 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-10-13 21:09:37,251 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-10-13 21:09:37,252 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-13 21:09:37,252 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-10-13 21:09:37,252 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-10-13 21:09:37,253 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-10-13 21:09:37,253 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-10-13 21:09:37,260 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-10-13 21:09:37,260 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-10-13 21:09:37,260 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-10-13 21:09:37,261 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-10-13 21:09:37,261 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-10-13 21:09:37,261 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-10-13 21:09:37,261 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-10-13 21:09:37,261 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-10-13 21:09:37,261 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-10-13 21:09:37,262 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-10-13 21:09:37,262 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-10-13 21:09:37,262 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-10-13 21:09:37,263 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-10-13 21:09:37,263 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-10-13 21:09:37,264 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 21:09:37,264 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-13 21:09:37,264 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 21:09:39,650 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 21:09:39,651 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-13 21:09:39,653 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:09:39 BoogieIcfgContainer [2019-10-13 21:09:39,653 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 21:09:39,654 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 21:09:39,654 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 21:09:39,658 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 21:09:39,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:09:35" (1/3) ... [2019-10-13 21:09:39,659 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72c429f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:09:39, skipping insertion in model container [2019-10-13 21:09:39,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:36" (2/3) ... [2019-10-13 21:09:39,660 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72c429f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:09:39, skipping insertion in model container [2019-10-13 21:09:39,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:09:39" (3/3) ... [2019-10-13 21:09:39,663 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product09.cil.c [2019-10-13 21:09:39,676 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 21:09:39,688 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 21:09:39,703 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 21:09:39,755 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 21:09:39,756 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 21:09:39,756 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 21:09:39,756 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 21:09:39,756 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 21:09:39,757 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 21:09:39,757 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 21:09:39,757 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 21:09:39,812 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states. [2019-10-13 21:09:39,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-10-13 21:09:39,853 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:39,855 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] [2019-10-13 21:09:39,859 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:39,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:39,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1329174793, now seen corresponding path program 1 times [2019-10-13 21:09:39,881 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:39,881 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372970034] [2019-10-13 21:09:39,881 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:39,882 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:39,882 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:40,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:40,529 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:09:40,530 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372970034] [2019-10-13 21:09:40,531 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704030682] [2019-10-13 21:09:40,531 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:41,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:41,325 INFO L256 TraceCheckSpWp]: Trace formula consists of 3175 conjuncts, 1 conjunts are in the unsatisfiable core [2019-10-13 21:09:41,347 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:41,393 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:09:41,393 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:41,738 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:09:41,739 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:09:41,739 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [4] total 4 [2019-10-13 21:09:41,739 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916249142] [2019-10-13 21:09:41,745 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-13 21:09:41,747 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:41,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-13 21:09:41,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:09:41,765 INFO L87 Difference]: Start difference. First operand 738 states. Second operand 2 states. [2019-10-13 21:09:41,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:41,835 INFO L93 Difference]: Finished difference Result 621 states and 997 transitions. [2019-10-13 21:09:41,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-13 21:09:41,836 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 138 [2019-10-13 21:09:41,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:41,868 INFO L225 Difference]: With dead ends: 621 [2019-10-13 21:09:41,869 INFO L226 Difference]: Without dead ends: 584 [2019-10-13 21:09:41,875 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 [2019-10-13 21:09:41,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2019-10-13 21:09:41,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 584. [2019-10-13 21:09:41,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 584 states. [2019-10-13 21:09:42,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 942 transitions. [2019-10-13 21:09:42,010 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 942 transitions. Word has length 138 [2019-10-13 21:09:42,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:42,013 INFO L462 AbstractCegarLoop]: Abstraction has 584 states and 942 transitions. [2019-10-13 21:09:42,013 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-13 21:09:42,014 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 942 transitions. [2019-10-13 21:09:42,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-10-13 21:09:42,020 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:42,020 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] [2019-10-13 21:09:42,225 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:42,225 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:42,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:42,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1202691332, now seen corresponding path program 1 times [2019-10-13 21:09:42,227 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:42,228 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931342961] [2019-10-13 21:09:42,228 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:42,229 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:42,229 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:42,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:42,541 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:09:42,541 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931342961] [2019-10-13 21:09:42,542 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051768237] [2019-10-13 21:09:42,542 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:43,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:43,124 INFO L256 TraceCheckSpWp]: Trace formula consists of 3178 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:09:43,132 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:43,179 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:09:43,179 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:43,463 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:09:43,463 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:43,463 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:09:43,464 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593811169] [2019-10-13 21:09:43,465 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:43,465 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:43,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:43,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:09:43,466 INFO L87 Difference]: Start difference. First operand 584 states and 942 transitions. Second operand 4 states. [2019-10-13 21:09:43,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:43,637 INFO L93 Difference]: Finished difference Result 1140 states and 1857 transitions. [2019-10-13 21:09:43,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:09:43,638 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 140 [2019-10-13 21:09:43,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:43,646 INFO L225 Difference]: With dead ends: 1140 [2019-10-13 21:09:43,646 INFO L226 Difference]: Without dead ends: 584 [2019-10-13 21:09:43,654 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 [2019-10-13 21:09:43,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2019-10-13 21:09:43,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 584. [2019-10-13 21:09:43,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 584 states. [2019-10-13 21:09:43,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 941 transitions. [2019-10-13 21:09:43,710 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 941 transitions. Word has length 140 [2019-10-13 21:09:43,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:43,712 INFO L462 AbstractCegarLoop]: Abstraction has 584 states and 941 transitions. [2019-10-13 21:09:43,712 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:09:43,712 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 941 transitions. [2019-10-13 21:09:43,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-10-13 21:09:43,719 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:43,719 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] [2019-10-13 21:09:43,935 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:43,936 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:43,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:43,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1148939338, now seen corresponding path program 1 times [2019-10-13 21:09:43,936 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:43,937 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795120213] [2019-10-13 21:09:43,937 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:43,937 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:43,937 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:43,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:44,107 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:09:44,108 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795120213] [2019-10-13 21:09:44,108 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221205625] [2019-10-13 21:09:44,108 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:44,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:44,720 INFO L256 TraceCheckSpWp]: Trace formula consists of 3180 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:09:44,726 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:44,760 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:09:44,760 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:44,996 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:09:44,996 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:44,997 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:09:44,997 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469755271] [2019-10-13 21:09:44,998 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:44,998 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:44,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:44,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:09:44,999 INFO L87 Difference]: Start difference. First operand 584 states and 941 transitions. Second operand 4 states. [2019-10-13 21:09:45,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:45,137 INFO L93 Difference]: Finished difference Result 1140 states and 1855 transitions. [2019-10-13 21:09:45,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:09:45,138 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 142 [2019-10-13 21:09:45,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:45,142 INFO L225 Difference]: With dead ends: 1140 [2019-10-13 21:09:45,142 INFO L226 Difference]: Without dead ends: 584 [2019-10-13 21:09:45,145 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 [2019-10-13 21:09:45,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2019-10-13 21:09:45,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 584. [2019-10-13 21:09:45,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 584 states. [2019-10-13 21:09:45,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 940 transitions. [2019-10-13 21:09:45,168 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 940 transitions. Word has length 142 [2019-10-13 21:09:45,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:45,168 INFO L462 AbstractCegarLoop]: Abstraction has 584 states and 940 transitions. [2019-10-13 21:09:45,168 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:09:45,169 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 940 transitions. [2019-10-13 21:09:45,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-10-13 21:09:45,172 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:45,173 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] [2019-10-13 21:09:45,382 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:45,383 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:45,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:45,384 INFO L82 PathProgramCache]: Analyzing trace with hash -333550332, now seen corresponding path program 1 times [2019-10-13 21:09:45,384 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:45,385 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713809050] [2019-10-13 21:09:45,385 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:45,385 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:45,386 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:45,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:45,507 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:09:45,508 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713809050] [2019-10-13 21:09:45,508 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880768075] [2019-10-13 21:09:45,508 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:46,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:46,061 INFO L256 TraceCheckSpWp]: Trace formula consists of 3182 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:09:46,081 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:46,118 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:09:46,119 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:46,418 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:09:46,418 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:46,419 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:09:46,419 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688948292] [2019-10-13 21:09:46,419 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:46,420 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:46,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:46,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:09:46,420 INFO L87 Difference]: Start difference. First operand 584 states and 940 transitions. Second operand 4 states. [2019-10-13 21:09:46,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:46,515 INFO L93 Difference]: Finished difference Result 1147 states and 1862 transitions. [2019-10-13 21:09:46,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:09:46,516 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 144 [2019-10-13 21:09:46,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:46,525 INFO L225 Difference]: With dead ends: 1147 [2019-10-13 21:09:46,525 INFO L226 Difference]: Without dead ends: 593 [2019-10-13 21:09:46,528 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 [2019-10-13 21:09:46,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2019-10-13 21:09:46,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 593. [2019-10-13 21:09:46,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 593 states. [2019-10-13 21:09:46,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 952 transitions. [2019-10-13 21:09:46,554 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 952 transitions. Word has length 144 [2019-10-13 21:09:46,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:46,555 INFO L462 AbstractCegarLoop]: Abstraction has 593 states and 952 transitions. [2019-10-13 21:09:46,555 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:09:46,555 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 952 transitions. [2019-10-13 21:09:46,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-10-13 21:09:46,562 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:46,562 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] [2019-10-13 21:09:46,770 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:46,770 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:46,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:46,771 INFO L82 PathProgramCache]: Analyzing trace with hash 2025668661, now seen corresponding path program 1 times [2019-10-13 21:09:46,772 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:46,772 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321230439] [2019-10-13 21:09:46,772 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:46,772 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:46,773 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:46,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:46,936 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:09:46,937 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321230439] [2019-10-13 21:09:46,937 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261671914] [2019-10-13 21:09:46,937 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:47,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:47,525 INFO L256 TraceCheckSpWp]: Trace formula consists of 3183 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:09:47,530 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:47,580 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:09:47,580 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:47,856 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:09:47,857 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:47,857 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:09:47,857 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579607366] [2019-10-13 21:09:47,858 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:47,858 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:47,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:47,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:09:47,859 INFO L87 Difference]: Start difference. First operand 593 states and 952 transitions. Second operand 4 states. [2019-10-13 21:09:47,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:47,939 INFO L93 Difference]: Finished difference Result 1149 states and 1863 transitions. [2019-10-13 21:09:47,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:09:47,939 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 145 [2019-10-13 21:09:47,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:47,945 INFO L225 Difference]: With dead ends: 1149 [2019-10-13 21:09:47,945 INFO L226 Difference]: Without dead ends: 593 [2019-10-13 21:09:47,948 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 [2019-10-13 21:09:47,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2019-10-13 21:09:47,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 593. [2019-10-13 21:09:47,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 593 states. [2019-10-13 21:09:47,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 951 transitions. [2019-10-13 21:09:47,972 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 951 transitions. Word has length 145 [2019-10-13 21:09:47,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:47,973 INFO L462 AbstractCegarLoop]: Abstraction has 593 states and 951 transitions. [2019-10-13 21:09:47,973 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:09:47,973 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 951 transitions. [2019-10-13 21:09:47,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-10-13 21:09:47,977 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:47,977 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] [2019-10-13 21:09:48,185 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:48,185 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:48,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:48,186 INFO L82 PathProgramCache]: Analyzing trace with hash -1147712472, now seen corresponding path program 1 times [2019-10-13 21:09:48,186 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:48,186 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470031994] [2019-10-13 21:09:48,187 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:48,187 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:48,187 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:48,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:48,297 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:09:48,298 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470031994] [2019-10-13 21:09:48,298 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302496560] [2019-10-13 21:09:48,298 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:48,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:48,934 INFO L256 TraceCheckSpWp]: Trace formula consists of 3184 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:09:48,939 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:48,966 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:09:48,967 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:49,316 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:09:49,317 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:49,317 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-13 21:09:49,317 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094687484] [2019-10-13 21:09:49,318 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:49,319 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:49,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:49,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:09:49,319 INFO L87 Difference]: Start difference. First operand 593 states and 951 transitions. Second operand 4 states. [2019-10-13 21:09:49,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:49,424 INFO L93 Difference]: Finished difference Result 1149 states and 1862 transitions. [2019-10-13 21:09:49,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:09:49,425 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 146 [2019-10-13 21:09:49,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:49,431 INFO L225 Difference]: With dead ends: 1149 [2019-10-13 21:09:49,432 INFO L226 Difference]: Without dead ends: 593 [2019-10-13 21:09:49,437 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 [2019-10-13 21:09:49,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2019-10-13 21:09:49,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 593. [2019-10-13 21:09:49,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 593 states. [2019-10-13 21:09:49,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 950 transitions. [2019-10-13 21:09:49,466 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 950 transitions. Word has length 146 [2019-10-13 21:09:49,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:49,466 INFO L462 AbstractCegarLoop]: Abstraction has 593 states and 950 transitions. [2019-10-13 21:09:49,466 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:09:49,466 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 950 transitions. [2019-10-13 21:09:49,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-10-13 21:09:49,471 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:49,472 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] [2019-10-13 21:09:49,681 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:49,682 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:49,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:49,682 INFO L82 PathProgramCache]: Analyzing trace with hash 261961625, now seen corresponding path program 1 times [2019-10-13 21:09:49,683 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:49,684 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502063389] [2019-10-13 21:09:49,684 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:49,684 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:49,685 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:49,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:49,891 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:09:49,891 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502063389] [2019-10-13 21:09:49,892 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707016920] [2019-10-13 21:09:49,892 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:50,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:50,509 INFO L256 TraceCheckSpWp]: Trace formula consists of 3185 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 21:09:50,513 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:50,581 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:09:50,582 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:51,372 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:09:51,372 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:51,372 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10, 7] total 16 [2019-10-13 21:09:51,373 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288696325] [2019-10-13 21:09:51,373 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 21:09:51,374 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:51,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 21:09:51,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2019-10-13 21:09:51,375 INFO L87 Difference]: Start difference. First operand 593 states and 950 transitions. Second operand 7 states. [2019-10-13 21:09:51,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:51,540 INFO L93 Difference]: Finished difference Result 1156 states and 1871 transitions. [2019-10-13 21:09:51,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:09:51,540 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 147 [2019-10-13 21:09:51,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:51,546 INFO L225 Difference]: With dead ends: 1156 [2019-10-13 21:09:51,546 INFO L226 Difference]: Without dead ends: 604 [2019-10-13 21:09:51,549 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 [2019-10-13 21:09:51,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2019-10-13 21:09:51,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 600. [2019-10-13 21:09:51,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 600 states. [2019-10-13 21:09:51,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 960 transitions. [2019-10-13 21:09:51,578 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 960 transitions. Word has length 147 [2019-10-13 21:09:51,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:51,578 INFO L462 AbstractCegarLoop]: Abstraction has 600 states and 960 transitions. [2019-10-13 21:09:51,579 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 21:09:51,579 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 960 transitions. [2019-10-13 21:09:51,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2019-10-13 21:09:51,583 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:51,584 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] [2019-10-13 21:09:51,792 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:51,793 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:51,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:51,793 INFO L82 PathProgramCache]: Analyzing trace with hash -654338191, now seen corresponding path program 1 times [2019-10-13 21:09:51,794 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:51,794 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42932294] [2019-10-13 21:09:51,794 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:51,795 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:51,795 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:51,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:51,948 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-13 21:09:51,949 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42932294] [2019-10-13 21:09:51,955 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593246634] [2019-10-13 21:09:51,956 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:52,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:52,558 INFO L256 TraceCheckSpWp]: Trace formula consists of 3186 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:09:52,570 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:52,603 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:09:52,604 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:52,870 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:09:52,871 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:52,871 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 10 [2019-10-13 21:09:52,871 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902934305] [2019-10-13 21:09:52,876 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:52,877 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:52,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:52,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-10-13 21:09:52,878 INFO L87 Difference]: Start difference. First operand 600 states and 960 transitions. Second operand 4 states. [2019-10-13 21:09:53,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:53,099 INFO L93 Difference]: Finished difference Result 1161 states and 1882 transitions. [2019-10-13 21:09:53,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:09:53,100 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 148 [2019-10-13 21:09:53,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:53,114 INFO L225 Difference]: With dead ends: 1161 [2019-10-13 21:09:53,114 INFO L226 Difference]: Without dead ends: 600 [2019-10-13 21:09:53,119 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 [2019-10-13 21:09:53,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2019-10-13 21:09:53,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 600. [2019-10-13 21:09:53,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 600 states. [2019-10-13 21:09:53,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 955 transitions. [2019-10-13 21:09:53,155 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 955 transitions. Word has length 148 [2019-10-13 21:09:53,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:53,156 INFO L462 AbstractCegarLoop]: Abstraction has 600 states and 955 transitions. [2019-10-13 21:09:53,156 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:09:53,156 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 955 transitions. [2019-10-13 21:09:53,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-10-13 21:09:53,162 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:53,162 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] [2019-10-13 21:09:53,374 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:53,374 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:53,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:53,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1377855302, now seen corresponding path program 1 times [2019-10-13 21:09:53,375 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:53,375 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079316174] [2019-10-13 21:09:53,375 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:53,375 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:53,376 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:53,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:53,549 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:09:53,549 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079316174] [2019-10-13 21:09:53,550 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795835128] [2019-10-13 21:09:53,550 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:54,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:54,453 INFO L256 TraceCheckSpWp]: Trace formula consists of 3187 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 21:09:54,469 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:54,567 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:09:54,568 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:55,035 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:09:55,035 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:55,035 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4, 7] total 10 [2019-10-13 21:09:55,036 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365149969] [2019-10-13 21:09:55,036 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 21:09:55,037 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:55,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 21:09:55,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-10-13 21:09:55,038 INFO L87 Difference]: Start difference. First operand 600 states and 955 transitions. Second operand 7 states. [2019-10-13 21:09:55,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:55,170 INFO L93 Difference]: Finished difference Result 1162 states and 1870 transitions. [2019-10-13 21:09:55,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:09:55,170 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 150 [2019-10-13 21:09:55,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:55,176 INFO L225 Difference]: With dead ends: 1162 [2019-10-13 21:09:55,176 INFO L226 Difference]: Without dead ends: 607 [2019-10-13 21:09:55,180 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 [2019-10-13 21:09:55,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2019-10-13 21:09:55,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 603. [2019-10-13 21:09:55,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 603 states. [2019-10-13 21:09:55,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 960 transitions. [2019-10-13 21:09:55,215 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 960 transitions. Word has length 150 [2019-10-13 21:09:55,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:55,217 INFO L462 AbstractCegarLoop]: Abstraction has 603 states and 960 transitions. [2019-10-13 21:09:55,217 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 21:09:55,217 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 960 transitions. [2019-10-13 21:09:55,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-10-13 21:09:55,220 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:55,221 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] [2019-10-13 21:09:55,431 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:55,431 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:55,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:55,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1770571481, now seen corresponding path program 1 times [2019-10-13 21:09:55,432 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:55,433 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603202996] [2019-10-13 21:09:55,433 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:55,433 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:55,433 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:55,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:55,565 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-13 21:09:55,566 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603202996] [2019-10-13 21:09:55,566 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193265245] [2019-10-13 21:09:55,566 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:56,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:56,355 INFO L256 TraceCheckSpWp]: Trace formula consists of 3188 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:09:56,363 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:56,393 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:09:56,393 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:56,623 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:09:56,623 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:56,623 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 10 [2019-10-13 21:09:56,624 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979728034] [2019-10-13 21:09:56,627 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:56,628 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:56,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:56,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-10-13 21:09:56,628 INFO L87 Difference]: Start difference. First operand 603 states and 960 transitions. Second operand 4 states. [2019-10-13 21:09:56,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:56,771 INFO L93 Difference]: Finished difference Result 1167 states and 1880 transitions. [2019-10-13 21:09:56,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:09:56,771 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 150 [2019-10-13 21:09:56,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:56,777 INFO L225 Difference]: With dead ends: 1167 [2019-10-13 21:09:56,777 INFO L226 Difference]: Without dead ends: 603 [2019-10-13 21:09:56,780 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 [2019-10-13 21:09:56,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2019-10-13 21:09:56,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 603. [2019-10-13 21:09:56,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 603 states. [2019-10-13 21:09:56,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 955 transitions. [2019-10-13 21:09:56,805 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 955 transitions. Word has length 150 [2019-10-13 21:09:56,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:56,805 INFO L462 AbstractCegarLoop]: Abstraction has 603 states and 955 transitions. [2019-10-13 21:09:56,805 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:09:56,806 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 955 transitions. [2019-10-13 21:09:56,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-10-13 21:09:56,810 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:56,810 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] [2019-10-13 21:09:57,017 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:57,018 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:57,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:57,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1535082471, now seen corresponding path program 1 times [2019-10-13 21:09:57,019 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:57,020 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368947217] [2019-10-13 21:09:57,020 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:57,020 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:57,020 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:57,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:57,153 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-13 21:09:57,153 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368947217] [2019-10-13 21:09:57,154 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012685758] [2019-10-13 21:09:57,154 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:57,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:57,842 INFO L256 TraceCheckSpWp]: Trace formula consists of 3190 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:09:57,847 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:57,888 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:09:57,888 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:58,106 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:09:58,106 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:58,106 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 10 [2019-10-13 21:09:58,107 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860404151] [2019-10-13 21:09:58,107 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:58,107 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:58,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:58,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-10-13 21:09:58,108 INFO L87 Difference]: Start difference. First operand 603 states and 955 transitions. Second operand 4 states. [2019-10-13 21:09:58,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:58,395 INFO L93 Difference]: Finished difference Result 1206 states and 1931 transitions. [2019-10-13 21:09:58,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:09:58,396 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 152 [2019-10-13 21:09:58,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:58,404 INFO L225 Difference]: With dead ends: 1206 [2019-10-13 21:09:58,404 INFO L226 Difference]: Without dead ends: 648 [2019-10-13 21:09:58,409 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 [2019-10-13 21:09:58,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2019-10-13 21:09:58,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 642. [2019-10-13 21:09:58,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 642 states. [2019-10-13 21:09:58,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 1017 transitions. [2019-10-13 21:09:58,444 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 1017 transitions. Word has length 152 [2019-10-13 21:09:58,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:58,444 INFO L462 AbstractCegarLoop]: Abstraction has 642 states and 1017 transitions. [2019-10-13 21:09:58,445 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:09:58,445 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 1017 transitions. [2019-10-13 21:09:58,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-10-13 21:09:58,449 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:58,449 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] [2019-10-13 21:09:58,665 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:58,666 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:58,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:58,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1523822727, now seen corresponding path program 1 times [2019-10-13 21:09:58,667 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:58,667 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742028332] [2019-10-13 21:09:58,668 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:58,668 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:58,669 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:58,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:58,843 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:09:58,844 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742028332] [2019-10-13 21:09:58,844 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863566022] [2019-10-13 21:09:58,844 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:59,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:59,523 INFO L256 TraceCheckSpWp]: Trace formula consists of 3189 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:09:59,527 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:59,555 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:09:59,556 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:59,761 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:09:59,762 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:59,762 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:09:59,762 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332559524] [2019-10-13 21:09:59,763 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:59,763 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:59,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:59,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:09:59,764 INFO L87 Difference]: Start difference. First operand 642 states and 1017 transitions. Second operand 4 states. [2019-10-13 21:09:59,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:59,931 INFO L93 Difference]: Finished difference Result 1200 states and 1921 transitions. [2019-10-13 21:09:59,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:09:59,932 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 152 [2019-10-13 21:09:59,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:59,937 INFO L225 Difference]: With dead ends: 1200 [2019-10-13 21:09:59,937 INFO L226 Difference]: Without dead ends: 642 [2019-10-13 21:09:59,941 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 300 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:09:59,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2019-10-13 21:09:59,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 642. [2019-10-13 21:09:59,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 642 states. [2019-10-13 21:09:59,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 1012 transitions. [2019-10-13 21:09:59,962 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 1012 transitions. Word has length 152 [2019-10-13 21:09:59,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:59,962 INFO L462 AbstractCegarLoop]: Abstraction has 642 states and 1012 transitions. [2019-10-13 21:09:59,963 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:09:59,963 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 1012 transitions. [2019-10-13 21:09:59,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-10-13 21:09:59,967 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:59,967 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] [2019-10-13 21:10:00,175 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:00,175 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:00,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:00,175 INFO L82 PathProgramCache]: Analyzing trace with hash 819565415, now seen corresponding path program 1 times [2019-10-13 21:10:00,176 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:00,176 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436615191] [2019-10-13 21:10:00,176 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:00,176 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:00,176 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:00,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:00,311 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:10:00,311 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436615191] [2019-10-13 21:10:00,312 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656131703] [2019-10-13 21:10:00,312 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:01,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:01,057 INFO L256 TraceCheckSpWp]: Trace formula consists of 3186 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 21:10:01,061 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:01,151 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:10:01,151 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:01,607 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:10:01,715 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 21:10:01,716 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:01,716 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 9] total 16 [2019-10-13 21:10:01,716 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933687483] [2019-10-13 21:10:01,717 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 21:10:01,717 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:01,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 21:10:01,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2019-10-13 21:10:01,718 INFO L87 Difference]: Start difference. First operand 642 states and 1012 transitions. Second operand 9 states. [2019-10-13 21:10:01,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:01,932 INFO L93 Difference]: Finished difference Result 1207 states and 1927 transitions. [2019-10-13 21:10:01,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 21:10:01,932 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 152 [2019-10-13 21:10:01,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:01,938 INFO L225 Difference]: With dead ends: 1207 [2019-10-13 21:10:01,938 INFO L226 Difference]: Without dead ends: 653 [2019-10-13 21:10:01,942 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 289 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2019-10-13 21:10:01,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2019-10-13 21:10:01,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 644. [2019-10-13 21:10:01,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 644 states. [2019-10-13 21:10:01,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 1016 transitions. [2019-10-13 21:10:01,964 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 1016 transitions. Word has length 152 [2019-10-13 21:10:01,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:01,964 INFO L462 AbstractCegarLoop]: Abstraction has 644 states and 1016 transitions. [2019-10-13 21:10:01,964 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 21:10:01,965 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 1016 transitions. [2019-10-13 21:10:01,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-10-13 21:10:01,968 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:01,969 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] [2019-10-13 21:10:02,178 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:02,179 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:02,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:02,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1494239802, now seen corresponding path program 1 times [2019-10-13 21:10:02,180 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:02,180 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252523014] [2019-10-13 21:10:02,181 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:02,181 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:02,181 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:02,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:02,298 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:10:02,298 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252523014] [2019-10-13 21:10:02,298 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214584052] [2019-10-13 21:10:02,299 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:02,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:02,972 INFO L256 TraceCheckSpWp]: Trace formula consists of 3185 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 21:10:02,981 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:03,027 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:10:03,028 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:03,367 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:10:03,367 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:10:03,368 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 13 [2019-10-13 21:10:03,368 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468677003] [2019-10-13 21:10:03,370 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 21:10:03,370 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:03,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 21:10:03,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2019-10-13 21:10:03,371 INFO L87 Difference]: Start difference. First operand 644 states and 1016 transitions. Second operand 11 states. [2019-10-13 21:10:03,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:03,544 INFO L93 Difference]: Finished difference Result 1141 states and 1824 transitions. [2019-10-13 21:10:03,545 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 21:10:03,545 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 152 [2019-10-13 21:10:03,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:03,553 INFO L225 Difference]: With dead ends: 1141 [2019-10-13 21:10:03,553 INFO L226 Difference]: Without dead ends: 661 [2019-10-13 21:10:03,558 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 [2019-10-13 21:10:03,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2019-10-13 21:10:03,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 651. [2019-10-13 21:10:03,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 651 states. [2019-10-13 21:10:03,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 1026 transitions. [2019-10-13 21:10:03,624 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 1026 transitions. Word has length 152 [2019-10-13 21:10:03,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:03,627 INFO L462 AbstractCegarLoop]: Abstraction has 651 states and 1026 transitions. [2019-10-13 21:10:03,627 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 21:10:03,627 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 1026 transitions. [2019-10-13 21:10:03,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-10-13 21:10:03,634 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:03,635 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] [2019-10-13 21:10:03,846 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:03,846 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:03,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:03,847 INFO L82 PathProgramCache]: Analyzing trace with hash -1825629817, now seen corresponding path program 1 times [2019-10-13 21:10:03,847 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:03,848 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693817855] [2019-10-13 21:10:03,848 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:03,848 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:03,848 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:03,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:04,016 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:10:04,017 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693817855] [2019-10-13 21:10:04,017 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901292217] [2019-10-13 21:10:04,018 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:04,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:04,961 INFO L256 TraceCheckSpWp]: Trace formula consists of 3191 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:04,967 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:04,993 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:10:04,993 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:05,197 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:10:05,197 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:05,198 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-13 21:10:05,198 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913253313] [2019-10-13 21:10:05,198 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:05,199 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:05,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:05,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:10:05,199 INFO L87 Difference]: Start difference. First operand 651 states and 1026 transitions. Second operand 4 states. [2019-10-13 21:10:05,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:05,385 INFO L93 Difference]: Finished difference Result 1218 states and 1943 transitions. [2019-10-13 21:10:05,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:10:05,385 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 154 [2019-10-13 21:10:05,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:05,390 INFO L225 Difference]: With dead ends: 1218 [2019-10-13 21:10:05,390 INFO L226 Difference]: Without dead ends: 651 [2019-10-13 21:10:05,394 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 [2019-10-13 21:10:05,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2019-10-13 21:10:05,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 651. [2019-10-13 21:10:05,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 651 states. [2019-10-13 21:10:05,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 1021 transitions. [2019-10-13 21:10:05,419 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 1021 transitions. Word has length 154 [2019-10-13 21:10:05,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:05,420 INFO L462 AbstractCegarLoop]: Abstraction has 651 states and 1021 transitions. [2019-10-13 21:10:05,420 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:05,420 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 1021 transitions. [2019-10-13 21:10:05,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2019-10-13 21:10:05,426 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:05,427 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] [2019-10-13 21:10:05,629 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:05,630 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:05,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:05,630 INFO L82 PathProgramCache]: Analyzing trace with hash 2084092048, now seen corresponding path program 1 times [2019-10-13 21:10:05,631 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:05,631 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019490029] [2019-10-13 21:10:05,631 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:05,631 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:05,631 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:05,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:05,733 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:10:05,734 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019490029] [2019-10-13 21:10:05,734 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751712091] [2019-10-13 21:10:05,734 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:06,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:06,461 INFO L256 TraceCheckSpWp]: Trace formula consists of 3192 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 21:10:06,464 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:06,525 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:10:06,526 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:06,911 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:10:06,911 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:10:06,912 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 10 [2019-10-13 21:10:06,912 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841026807] [2019-10-13 21:10:06,912 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 21:10:06,912 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:06,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 21:10:06,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-10-13 21:10:06,913 INFO L87 Difference]: Start difference. First operand 651 states and 1021 transitions. Second operand 8 states. [2019-10-13 21:10:07,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:07,038 INFO L93 Difference]: Finished difference Result 1145 states and 1826 transitions. [2019-10-13 21:10:07,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:10:07,039 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 155 [2019-10-13 21:10:07,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:07,043 INFO L225 Difference]: With dead ends: 1145 [2019-10-13 21:10:07,044 INFO L226 Difference]: Without dead ends: 665 [2019-10-13 21:10:07,046 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 [2019-10-13 21:10:07,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2019-10-13 21:10:07,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 658. [2019-10-13 21:10:07,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 658 states. [2019-10-13 21:10:07,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 1032 transitions. [2019-10-13 21:10:07,070 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 1032 transitions. Word has length 155 [2019-10-13 21:10:07,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:07,070 INFO L462 AbstractCegarLoop]: Abstraction has 658 states and 1032 transitions. [2019-10-13 21:10:07,071 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 21:10:07,071 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 1032 transitions. [2019-10-13 21:10:07,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-10-13 21:10:07,075 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:07,075 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] [2019-10-13 21:10:07,284 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:07,284 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:07,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:07,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1252866708, now seen corresponding path program 1 times [2019-10-13 21:10:07,285 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:07,285 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516312325] [2019-10-13 21:10:07,285 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:07,285 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:07,285 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:07,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:07,378 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:10:07,379 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516312325] [2019-10-13 21:10:07,379 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852019930] [2019-10-13 21:10:07,379 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:08,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:08,111 INFO L256 TraceCheckSpWp]: Trace formula consists of 3182 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 21:10:08,117 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:08,189 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 21:10:08,189 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:08,519 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:10:08,642 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 21:10:08,642 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:10:08,642 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [4] total 16 [2019-10-13 21:10:08,642 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256266578] [2019-10-13 21:10:08,643 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-13 21:10:08,643 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:08,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-13 21:10:08,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2019-10-13 21:10:08,644 INFO L87 Difference]: Start difference. First operand 658 states and 1032 transitions. Second operand 14 states. [2019-10-13 21:10:08,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:08,921 INFO L93 Difference]: Finished difference Result 1146 states and 1828 transitions. [2019-10-13 21:10:08,921 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 21:10:08,921 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 153 [2019-10-13 21:10:08,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:08,928 INFO L225 Difference]: With dead ends: 1146 [2019-10-13 21:10:08,928 INFO L226 Difference]: Without dead ends: 666 [2019-10-13 21:10:08,931 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 292 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2019-10-13 21:10:08,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2019-10-13 21:10:08,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 658. [2019-10-13 21:10:08,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 658 states. [2019-10-13 21:10:08,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 1032 transitions. [2019-10-13 21:10:08,957 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 1032 transitions. Word has length 153 [2019-10-13 21:10:08,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:08,957 INFO L462 AbstractCegarLoop]: Abstraction has 658 states and 1032 transitions. [2019-10-13 21:10:08,958 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-13 21:10:08,958 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 1032 transitions. [2019-10-13 21:10:08,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-10-13 21:10:08,962 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:08,962 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]