/usr/bin/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_spec14_product19.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 00:39:14,472 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 00:39:14,475 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 00:39:14,486 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 00:39:14,487 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 00:39:14,488 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 00:39:14,489 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 00:39:14,491 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 00:39:14,493 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 00:39:14,494 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 00:39:14,495 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 00:39:14,496 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 00:39:14,496 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 00:39:14,497 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 00:39:14,498 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 00:39:14,499 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 00:39:14,500 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 00:39:14,501 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 00:39:14,503 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 00:39:14,505 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 00:39:14,507 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 00:39:14,508 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 00:39:14,509 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 00:39:14,510 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 00:39:14,513 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-07 00:39:14,513 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-07 00:39:14,514 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-07 00:39:14,515 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-07 00:39:14,515 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-07 00:39:14,516 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-07 00:39:14,516 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-07 00:39:14,517 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-07 00:39:14,518 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-07 00:39:14,519 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-07 00:39:14,520 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-07 00:39:14,520 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-07 00:39:14,521 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-07 00:39:14,521 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-07 00:39:14,521 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 00:39:14,522 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 00:39:14,523 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 00:39:14,524 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 [2019-11-07 00:39:14,538 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 00:39:14,539 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 00:39:14,540 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 00:39:14,540 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 00:39:14,540 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 00:39:14,541 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 00:39:14,541 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 00:39:14,541 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 00:39:14,541 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 00:39:14,541 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 00:39:14,542 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 00:39:14,542 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 00:39:14,542 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 00:39:14,542 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 00:39:14,542 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 00:39:14,543 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 00:39:14,543 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 00:39:14,543 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 00:39:14,543 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 00:39:14,544 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 00:39:14,544 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 00:39:14,544 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 00:39:14,544 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 00:39:14,544 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 00:39:14,545 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 00:39:14,545 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 00:39:14,545 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 00:39:14,545 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 00:39:14,545 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 [2019-11-07 00:39:14,806 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 00:39:14,824 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 00:39:14,829 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 00:39:14,831 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 00:39:14,831 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 00:39:14,832 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec14_product19.cil.c [2019-11-07 00:39:14,911 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/776da036e/17448c51826f4ee0835b56723c4b010d/FLAG4ee9873f0 [2019-11-07 00:39:15,584 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 00:39:15,584 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec14_product19.cil.c [2019-11-07 00:39:15,603 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/776da036e/17448c51826f4ee0835b56723c4b010d/FLAG4ee9873f0 [2019-11-07 00:39:15,837 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/776da036e/17448c51826f4ee0835b56723c4b010d [2019-11-07 00:39:15,846 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 00:39:15,848 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 00:39:15,849 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 00:39:15,849 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 00:39:15,853 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 00:39:15,854 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:39:15" (1/1) ... [2019-11-07 00:39:15,857 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30191dee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:15, skipping insertion in model container [2019-11-07 00:39:15,858 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:39:15" (1/1) ... [2019-11-07 00:39:15,863 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 00:39:15,933 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 00:39:16,661 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 00:39:16,686 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 00:39:16,862 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 00:39:16,933 INFO L192 MainTranslator]: Completed translation [2019-11-07 00:39:16,933 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:16 WrapperNode [2019-11-07 00:39:16,933 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 00:39:16,934 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 00:39:16,934 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 00:39:16,934 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 00:39:16,949 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:16" (1/1) ... [2019-11-07 00:39:16,949 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:16" (1/1) ... [2019-11-07 00:39:16,985 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:16" (1/1) ... [2019-11-07 00:39:16,986 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:16" (1/1) ... [2019-11-07 00:39:17,067 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:16" (1/1) ... [2019-11-07 00:39:17,089 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:16" (1/1) ... [2019-11-07 00:39:17,099 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:16" (1/1) ... [2019-11-07 00:39:17,119 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 00:39:17,120 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 00:39:17,120 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 00:39:17,120 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 00:39:17,121 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:16" (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 [2019-11-07 00:39:17,207 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 00:39:17,208 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 00:39:17,208 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-11-07 00:39:17,208 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-11-07 00:39:17,208 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-11-07 00:39:17,210 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-11-07 00:39:17,210 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-11-07 00:39:17,211 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-11-07 00:39:17,211 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-11-07 00:39:17,212 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-11-07 00:39:17,212 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-11-07 00:39:17,212 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-11-07 00:39:17,213 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-11-07 00:39:17,214 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-11-07 00:39:17,214 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-11-07 00:39:17,214 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-11-07 00:39:17,217 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-11-07 00:39:17,217 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-11-07 00:39:17,218 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-11-07 00:39:17,218 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2019-11-07 00:39:17,218 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-11-07 00:39:17,219 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-11-07 00:39:17,219 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-11-07 00:39:17,219 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__weight [2019-11-07 00:39:17,219 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-11-07 00:39:17,220 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-11-07 00:39:17,220 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-11-07 00:39:17,220 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-11-07 00:39:17,220 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-11-07 00:39:17,221 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-11-07 00:39:17,221 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2019-11-07 00:39:17,221 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloor [2019-11-07 00:39:17,221 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-11-07 00:39:17,222 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-11-07 00:39:17,223 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification14_spec__1 [2019-11-07 00:39:17,223 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-11-07 00:39:17,223 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-11-07 00:39:17,224 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-11-07 00:39:17,224 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-11-07 00:39:17,224 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-11-07 00:39:17,224 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-11-07 00:39:17,225 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-11-07 00:39:17,225 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-11-07 00:39:17,225 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-11-07 00:39:17,225 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-11-07 00:39:17,226 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-11-07 00:39:17,226 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-11-07 00:39:17,226 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-11-07 00:39:17,226 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-11-07 00:39:17,226 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-11-07 00:39:17,227 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-11-07 00:39:17,227 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-11-07 00:39:17,227 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-11-07 00:39:17,227 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-11-07 00:39:17,228 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-11-07 00:39:17,228 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-11-07 00:39:17,228 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-11-07 00:39:17,228 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-11-07 00:39:17,229 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-11-07 00:39:17,229 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-11-07 00:39:17,229 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-11-07 00:39:17,229 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-11-07 00:39:17,230 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-11-07 00:39:17,230 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-11-07 00:39:17,230 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-11-07 00:39:17,231 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-11-07 00:39:17,231 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 00:39:17,231 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-11-07 00:39:17,231 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-11-07 00:39:17,231 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-11-07 00:39:17,231 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-11-07 00:39:17,232 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-11-07 00:39:17,232 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-11-07 00:39:17,233 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-11-07 00:39:17,233 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-11-07 00:39:17,233 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 00:39:17,234 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 00:39:17,234 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-11-07 00:39:17,234 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-11-07 00:39:17,235 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-11-07 00:39:17,235 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-11-07 00:39:17,236 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-11-07 00:39:17,236 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-11-07 00:39:17,236 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-11-07 00:39:17,238 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-11-07 00:39:17,238 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-11-07 00:39:17,238 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-11-07 00:39:17,239 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-11-07 00:39:17,240 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-11-07 00:39:17,240 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-11-07 00:39:17,240 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-11-07 00:39:17,240 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-11-07 00:39:17,241 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-11-07 00:39:17,241 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-11-07 00:39:17,241 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-11-07 00:39:17,241 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-11-07 00:39:17,241 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-11-07 00:39:17,242 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-11-07 00:39:17,242 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2019-11-07 00:39:17,242 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloor [2019-11-07 00:39:17,242 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-11-07 00:39:17,243 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-11-07 00:39:17,243 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-11-07 00:39:17,243 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-11-07 00:39:17,243 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-11-07 00:39:17,244 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-11-07 00:39:17,244 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-11-07 00:39:17,244 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2019-11-07 00:39:17,244 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-11-07 00:39:17,245 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-11-07 00:39:17,245 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__weight [2019-11-07 00:39:17,245 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-11-07 00:39:17,245 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-11-07 00:39:17,245 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-11-07 00:39:17,246 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification14_spec__1 [2019-11-07 00:39:17,246 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 00:39:17,246 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-11-07 00:39:17,247 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-11-07 00:39:17,247 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-11-07 00:39:17,247 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-11-07 00:39:17,248 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-11-07 00:39:17,248 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-11-07 00:39:17,248 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-11-07 00:39:17,248 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-11-07 00:39:17,250 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-11-07 00:39:17,250 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-11-07 00:39:17,250 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-11-07 00:39:17,250 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-11-07 00:39:17,250 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-07 00:39:17,250 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-07 00:39:17,251 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-11-07 00:39:17,251 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-07 00:39:17,251 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-07 00:39:17,252 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 00:39:17,252 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-07 00:39:17,252 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-11-07 00:39:17,253 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 00:39:17,256 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-11-07 00:39:17,257 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-11-07 00:39:17,257 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 00:39:17,258 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-11-07 00:39:17,258 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-11-07 00:39:17,258 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-11-07 00:39:17,259 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-11-07 00:39:17,267 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-11-07 00:39:17,267 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-11-07 00:39:17,267 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-11-07 00:39:17,268 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-07 00:39:17,268 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-11-07 00:39:17,268 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-11-07 00:39:17,268 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-11-07 00:39:17,269 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-11-07 00:39:17,270 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-11-07 00:39:17,270 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-11-07 00:39:17,270 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-11-07 00:39:17,270 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-11-07 00:39:17,271 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-11-07 00:39:17,271 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-11-07 00:39:17,271 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-11-07 00:39:17,271 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-11-07 00:39:17,271 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 00:39:17,271 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-11-07 00:39:17,272 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 00:39:17,272 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-07 00:39:17,272 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 00:39:19,640 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 00:39:19,641 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-11-07 00:39:19,643 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:39:19 BoogieIcfgContainer [2019-11-07 00:39:19,643 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 00:39:19,644 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 00:39:19,644 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 00:39:19,648 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 00:39:19,648 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:39:15" (1/3) ... [2019-11-07 00:39:19,649 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@566b9ec8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:39:19, skipping insertion in model container [2019-11-07 00:39:19,649 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:16" (2/3) ... [2019-11-07 00:39:19,650 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@566b9ec8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:39:19, skipping insertion in model container [2019-11-07 00:39:19,650 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:39:19" (3/3) ... [2019-11-07 00:39:19,652 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product19.cil.c [2019-11-07 00:39:19,663 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 00:39:19,673 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 00:39:19,685 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 00:39:19,730 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 00:39:19,730 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 00:39:19,731 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 00:39:19,731 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 00:39:19,731 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 00:39:19,731 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 00:39:19,731 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 00:39:19,731 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 00:39:19,766 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states. [2019-11-07 00:39:19,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-11-07 00:39:19,791 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:19,792 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:39:19,794 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:19,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:19,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1411507135, now seen corresponding path program 1 times [2019-11-07 00:39:19,811 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:19,811 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5299459] [2019-11-07 00:39:19,812 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:20,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:20,501 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-07 00:39:20,502 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5299459] [2019-11-07 00:39:20,503 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:20,503 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 00:39:20,504 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650774304] [2019-11-07 00:39:20,509 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:39:20,511 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:20,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:39:20,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 00:39:20,528 INFO L87 Difference]: Start difference. First operand 735 states. Second operand 4 states. [2019-11-07 00:39:20,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:20,730 INFO L93 Difference]: Finished difference Result 1168 states and 1874 transitions. [2019-11-07 00:39:20,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:39:20,732 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 135 [2019-11-07 00:39:20,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:20,764 INFO L225 Difference]: With dead ends: 1168 [2019-11-07 00:39:20,765 INFO L226 Difference]: Without dead ends: 587 [2019-11-07 00:39:20,777 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-07 00:39:20,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2019-11-07 00:39:20,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 587. [2019-11-07 00:39:20,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 587 states. [2019-11-07 00:39:20,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 928 transitions. [2019-11-07 00:39:20,908 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 928 transitions. Word has length 135 [2019-11-07 00:39:20,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:20,909 INFO L462 AbstractCegarLoop]: Abstraction has 587 states and 928 transitions. [2019-11-07 00:39:20,910 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:39:20,910 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 928 transitions. [2019-11-07 00:39:20,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-11-07 00:39:20,924 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:20,924 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:39:20,925 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:20,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:20,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1349279833, now seen corresponding path program 1 times [2019-11-07 00:39:20,925 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:20,927 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144187970] [2019-11-07 00:39:20,927 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:21,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:21,182 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-07 00:39:21,183 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144187970] [2019-11-07 00:39:21,183 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:21,183 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 00:39:21,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622997017] [2019-11-07 00:39:21,185 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:39:21,186 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:21,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:39:21,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 00:39:21,187 INFO L87 Difference]: Start difference. First operand 587 states and 928 transitions. Second operand 4 states. [2019-11-07 00:39:21,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:21,299 INFO L93 Difference]: Finished difference Result 1141 states and 1817 transitions. [2019-11-07 00:39:21,299 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 00:39:21,299 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 136 [2019-11-07 00:39:21,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:21,305 INFO L225 Difference]: With dead ends: 1141 [2019-11-07 00:39:21,305 INFO L226 Difference]: Without dead ends: 587 [2019-11-07 00:39:21,308 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-07 00:39:21,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2019-11-07 00:39:21,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 587. [2019-11-07 00:39:21,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 587 states. [2019-11-07 00:39:21,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 927 transitions. [2019-11-07 00:39:21,340 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 927 transitions. Word has length 136 [2019-11-07 00:39:21,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:21,340 INFO L462 AbstractCegarLoop]: Abstraction has 587 states and 927 transitions. [2019-11-07 00:39:21,340 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:39:21,340 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 927 transitions. [2019-11-07 00:39:21,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-11-07 00:39:21,345 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:21,345 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:39:21,346 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:21,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:21,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1382966461, now seen corresponding path program 1 times [2019-11-07 00:39:21,346 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:21,347 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459092666] [2019-11-07 00:39:21,347 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:21,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:21,550 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-07 00:39:21,550 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459092666] [2019-11-07 00:39:21,550 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:21,551 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 00:39:21,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379572715] [2019-11-07 00:39:21,551 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:39:21,552 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:21,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:39:21,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 00:39:21,552 INFO L87 Difference]: Start difference. First operand 587 states and 927 transitions. Second operand 4 states. [2019-11-07 00:39:21,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:21,625 INFO L93 Difference]: Finished difference Result 1141 states and 1816 transitions. [2019-11-07 00:39:21,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 00:39:21,625 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 137 [2019-11-07 00:39:21,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:21,630 INFO L225 Difference]: With dead ends: 1141 [2019-11-07 00:39:21,630 INFO L226 Difference]: Without dead ends: 587 [2019-11-07 00:39:21,637 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-07 00:39:21,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2019-11-07 00:39:21,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 587. [2019-11-07 00:39:21,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 587 states. [2019-11-07 00:39:21,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 926 transitions. [2019-11-07 00:39:21,666 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 926 transitions. Word has length 137 [2019-11-07 00:39:21,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:21,667 INFO L462 AbstractCegarLoop]: Abstraction has 587 states and 926 transitions. [2019-11-07 00:39:21,667 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:39:21,667 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 926 transitions. [2019-11-07 00:39:21,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-11-07 00:39:21,671 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:21,671 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:39:21,672 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:21,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:21,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1519078827, now seen corresponding path program 1 times [2019-11-07 00:39:21,672 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:21,673 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284192185] [2019-11-07 00:39:21,673 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:21,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:21,806 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-07 00:39:21,807 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284192185] [2019-11-07 00:39:21,807 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:21,807 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 00:39:21,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517327719] [2019-11-07 00:39:21,808 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:39:21,808 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:21,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:39:21,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 00:39:21,809 INFO L87 Difference]: Start difference. First operand 587 states and 926 transitions. Second operand 4 states. [2019-11-07 00:39:21,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:21,891 INFO L93 Difference]: Finished difference Result 1141 states and 1815 transitions. [2019-11-07 00:39:21,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 00:39:21,891 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 138 [2019-11-07 00:39:21,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:21,897 INFO L225 Difference]: With dead ends: 1141 [2019-11-07 00:39:21,897 INFO L226 Difference]: Without dead ends: 587 [2019-11-07 00:39:21,901 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-07 00:39:21,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2019-11-07 00:39:21,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 587. [2019-11-07 00:39:21,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 587 states. [2019-11-07 00:39:21,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 925 transitions. [2019-11-07 00:39:21,926 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 925 transitions. Word has length 138 [2019-11-07 00:39:21,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:21,927 INFO L462 AbstractCegarLoop]: Abstraction has 587 states and 925 transitions. [2019-11-07 00:39:21,927 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:39:21,927 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 925 transitions. [2019-11-07 00:39:21,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2019-11-07 00:39:21,931 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:21,931 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:39:21,932 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:21,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:21,932 INFO L82 PathProgramCache]: Analyzing trace with hash -939532999, now seen corresponding path program 1 times [2019-11-07 00:39:21,932 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:21,933 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253944211] [2019-11-07 00:39:21,933 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:21,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:22,097 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-07 00:39:22,098 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253944211] [2019-11-07 00:39:22,098 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:22,098 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 00:39:22,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284522757] [2019-11-07 00:39:22,100 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:39:22,100 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:22,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:39:22,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 00:39:22,101 INFO L87 Difference]: Start difference. First operand 587 states and 925 transitions. Second operand 4 states. [2019-11-07 00:39:22,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:22,216 INFO L93 Difference]: Finished difference Result 1141 states and 1814 transitions. [2019-11-07 00:39:22,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 00:39:22,217 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 139 [2019-11-07 00:39:22,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:22,222 INFO L225 Difference]: With dead ends: 1141 [2019-11-07 00:39:22,223 INFO L226 Difference]: Without dead ends: 587 [2019-11-07 00:39:22,226 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-07 00:39:22,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2019-11-07 00:39:22,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 587. [2019-11-07 00:39:22,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 587 states. [2019-11-07 00:39:22,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 924 transitions. [2019-11-07 00:39:22,249 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 924 transitions. Word has length 139 [2019-11-07 00:39:22,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:22,250 INFO L462 AbstractCegarLoop]: Abstraction has 587 states and 924 transitions. [2019-11-07 00:39:22,250 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:39:22,250 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 924 transitions. [2019-11-07 00:39:22,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-11-07 00:39:22,254 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:22,254 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:39:22,254 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:22,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:22,254 INFO L82 PathProgramCache]: Analyzing trace with hash 195155025, now seen corresponding path program 1 times [2019-11-07 00:39:22,255 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:22,255 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481828398] [2019-11-07 00:39:22,255 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:22,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:22,457 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-07 00:39:22,457 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481828398] [2019-11-07 00:39:22,459 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:22,459 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2019-11-07 00:39:22,459 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275534471] [2019-11-07 00:39:22,460 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-07 00:39:22,460 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:22,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-07 00:39:22,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2019-11-07 00:39:22,462 INFO L87 Difference]: Start difference. First operand 587 states and 924 transitions. Second operand 10 states. [2019-11-07 00:39:22,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:22,700 INFO L93 Difference]: Finished difference Result 1146 states and 1821 transitions. [2019-11-07 00:39:22,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-07 00:39:22,701 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 140 [2019-11-07 00:39:22,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:22,713 INFO L225 Difference]: With dead ends: 1146 [2019-11-07 00:39:22,714 INFO L226 Difference]: Without dead ends: 596 [2019-11-07 00:39:22,718 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2019-11-07 00:39:22,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2019-11-07 00:39:22,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 594. [2019-11-07 00:39:22,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 594 states. [2019-11-07 00:39:22,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 934 transitions. [2019-11-07 00:39:22,750 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 934 transitions. Word has length 140 [2019-11-07 00:39:22,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:22,750 INFO L462 AbstractCegarLoop]: Abstraction has 594 states and 934 transitions. [2019-11-07 00:39:22,750 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-07 00:39:22,751 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 934 transitions. [2019-11-07 00:39:22,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-11-07 00:39:22,757 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:22,757 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:39:22,757 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:22,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:22,758 INFO L82 PathProgramCache]: Analyzing trace with hash -791427664, now seen corresponding path program 1 times [2019-11-07 00:39:22,758 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:22,758 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251868697] [2019-11-07 00:39:22,758 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:22,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:22,883 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-07 00:39:22,883 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251868697] [2019-11-07 00:39:22,883 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:22,884 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 00:39:22,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055815192] [2019-11-07 00:39:22,884 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:39:22,885 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:22,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:39:22,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 00:39:22,885 INFO L87 Difference]: Start difference. First operand 594 states and 934 transitions. Second operand 4 states. [2019-11-07 00:39:23,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:23,004 INFO L93 Difference]: Finished difference Result 1147 states and 1822 transitions. [2019-11-07 00:39:23,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:39:23,005 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 140 [2019-11-07 00:39:23,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:23,011 INFO L225 Difference]: With dead ends: 1147 [2019-11-07 00:39:23,012 INFO L226 Difference]: Without dead ends: 590 [2019-11-07 00:39:23,015 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-07 00:39:23,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2019-11-07 00:39:23,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 590. [2019-11-07 00:39:23,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 590 states. [2019-11-07 00:39:23,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 927 transitions. [2019-11-07 00:39:23,042 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 927 transitions. Word has length 140 [2019-11-07 00:39:23,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:23,043 INFO L462 AbstractCegarLoop]: Abstraction has 590 states and 927 transitions. [2019-11-07 00:39:23,043 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:39:23,043 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 927 transitions. [2019-11-07 00:39:23,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-11-07 00:39:23,047 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:23,047 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:39:23,048 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:23,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:23,048 INFO L82 PathProgramCache]: Analyzing trace with hash -306965809, now seen corresponding path program 1 times [2019-11-07 00:39:23,049 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:23,050 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907926637] [2019-11-07 00:39:23,050 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:23,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:23,188 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-07 00:39:23,189 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907926637] [2019-11-07 00:39:23,189 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:23,189 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-07 00:39:23,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995421123] [2019-11-07 00:39:23,190 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 00:39:23,191 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:23,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 00:39:23,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-07 00:39:23,191 INFO L87 Difference]: Start difference. First operand 590 states and 927 transitions. Second operand 6 states. [2019-11-07 00:39:23,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:23,483 INFO L93 Difference]: Finished difference Result 1160 states and 1846 transitions. [2019-11-07 00:39:23,485 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-07 00:39:23,486 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 141 [2019-11-07 00:39:23,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:23,491 INFO L225 Difference]: With dead ends: 1160 [2019-11-07 00:39:23,491 INFO L226 Difference]: Without dead ends: 598 [2019-11-07 00:39:23,495 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:39:23,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2019-11-07 00:39:23,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 595. [2019-11-07 00:39:23,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 595 states. [2019-11-07 00:39:23,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 928 transitions. [2019-11-07 00:39:23,520 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 928 transitions. Word has length 141 [2019-11-07 00:39:23,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:23,521 INFO L462 AbstractCegarLoop]: Abstraction has 595 states and 928 transitions. [2019-11-07 00:39:23,521 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 00:39:23,521 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 928 transitions. [2019-11-07 00:39:23,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-11-07 00:39:23,525 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:23,525 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:39:23,525 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:23,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:23,526 INFO L82 PathProgramCache]: Analyzing trace with hash 394745588, now seen corresponding path program 1 times [2019-11-07 00:39:23,527 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:23,527 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375888391] [2019-11-07 00:39:23,527 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:23,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:23,684 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-07 00:39:23,685 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375888391] [2019-11-07 00:39:23,685 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:23,685 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-07 00:39:23,685 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800202056] [2019-11-07 00:39:23,686 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 00:39:23,686 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:23,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 00:39:23,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-07 00:39:23,687 INFO L87 Difference]: Start difference. First operand 595 states and 928 transitions. Second operand 6 states. [2019-11-07 00:39:24,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:24,001 INFO L93 Difference]: Finished difference Result 1123 states and 1761 transitions. [2019-11-07 00:39:24,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 00:39:24,002 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 142 [2019-11-07 00:39:24,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:24,011 INFO L225 Difference]: With dead ends: 1123 [2019-11-07 00:39:24,011 INFO L226 Difference]: Without dead ends: 595 [2019-11-07 00:39:24,016 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:39:24,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2019-11-07 00:39:24,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 595. [2019-11-07 00:39:24,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 595 states. [2019-11-07 00:39:24,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 924 transitions. [2019-11-07 00:39:24,053 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 924 transitions. Word has length 142 [2019-11-07 00:39:24,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:24,053 INFO L462 AbstractCegarLoop]: Abstraction has 595 states and 924 transitions. [2019-11-07 00:39:24,053 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 00:39:24,054 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 924 transitions. [2019-11-07 00:39:24,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2019-11-07 00:39:24,060 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:24,061 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:39:24,061 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:24,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:24,061 INFO L82 PathProgramCache]: Analyzing trace with hash -447409932, now seen corresponding path program 1 times [2019-11-07 00:39:24,062 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:24,062 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090138469] [2019-11-07 00:39:24,062 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:24,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:24,247 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-07 00:39:24,247 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090138469] [2019-11-07 00:39:24,247 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:24,248 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-07 00:39:24,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128095529] [2019-11-07 00:39:24,248 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 00:39:24,248 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:24,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 00:39:24,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-07 00:39:24,249 INFO L87 Difference]: Start difference. First operand 595 states and 924 transitions. Second operand 6 states. [2019-11-07 00:39:24,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:24,467 INFO L93 Difference]: Finished difference Result 1123 states and 1757 transitions. [2019-11-07 00:39:24,468 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 00:39:24,468 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 143 [2019-11-07 00:39:24,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:24,474 INFO L225 Difference]: With dead ends: 1123 [2019-11-07 00:39:24,475 INFO L226 Difference]: Without dead ends: 595 [2019-11-07 00:39:24,483 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:39:24,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2019-11-07 00:39:24,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 595. [2019-11-07 00:39:24,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 595 states. [2019-11-07 00:39:24,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 920 transitions. [2019-11-07 00:39:24,516 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 920 transitions. Word has length 143 [2019-11-07 00:39:24,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:24,517 INFO L462 AbstractCegarLoop]: Abstraction has 595 states and 920 transitions. [2019-11-07 00:39:24,518 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 00:39:24,518 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 920 transitions. [2019-11-07 00:39:24,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2019-11-07 00:39:24,521 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:24,522 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:39:24,522 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:24,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:24,522 INFO L82 PathProgramCache]: Analyzing trace with hash -170078860, now seen corresponding path program 1 times [2019-11-07 00:39:24,523 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:24,523 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581075549] [2019-11-07 00:39:24,523 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:24,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:24,667 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-07 00:39:24,667 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581075549] [2019-11-07 00:39:24,668 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:24,668 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-07 00:39:24,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081242213] [2019-11-07 00:39:24,668 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 00:39:24,669 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:24,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 00:39:24,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:39:24,669 INFO L87 Difference]: Start difference. First operand 595 states and 920 transitions. Second operand 7 states. [2019-11-07 00:39:24,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:24,802 INFO L93 Difference]: Finished difference Result 1126 states and 1757 transitions. [2019-11-07 00:39:24,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:39:24,803 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 143 [2019-11-07 00:39:24,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:24,809 INFO L225 Difference]: With dead ends: 1126 [2019-11-07 00:39:24,810 INFO L226 Difference]: Without dead ends: 577 [2019-11-07 00:39:24,814 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:39:24,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2019-11-07 00:39:24,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 574. [2019-11-07 00:39:24,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 574 states. [2019-11-07 00:39:24,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 883 transitions. [2019-11-07 00:39:24,839 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 883 transitions. Word has length 143 [2019-11-07 00:39:24,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:24,840 INFO L462 AbstractCegarLoop]: Abstraction has 574 states and 883 transitions. [2019-11-07 00:39:24,840 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 00:39:24,840 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 883 transitions. [2019-11-07 00:39:24,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-11-07 00:39:24,845 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:24,845 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:39:24,846 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:24,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:24,846 INFO L82 PathProgramCache]: Analyzing trace with hash -1904799623, now seen corresponding path program 1 times [2019-11-07 00:39:24,847 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:24,847 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706843395] [2019-11-07 00:39:24,847 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:24,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:25,058 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-07 00:39:25,059 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706843395] [2019-11-07 00:39:25,059 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:25,059 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-07 00:39:25,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038580191] [2019-11-07 00:39:25,061 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 00:39:25,061 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:25,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 00:39:25,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-07 00:39:25,061 INFO L87 Difference]: Start difference. First operand 574 states and 883 transitions. Second operand 6 states. [2019-11-07 00:39:25,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:25,197 INFO L93 Difference]: Finished difference Result 1102 states and 1716 transitions. [2019-11-07 00:39:25,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 00:39:25,198 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 144 [2019-11-07 00:39:25,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:25,202 INFO L225 Difference]: With dead ends: 1102 [2019-11-07 00:39:25,202 INFO L226 Difference]: Without dead ends: 574 [2019-11-07 00:39:25,205 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:39:25,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2019-11-07 00:39:25,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 574. [2019-11-07 00:39:25,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 574 states. [2019-11-07 00:39:25,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 882 transitions. [2019-11-07 00:39:25,227 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 882 transitions. Word has length 144 [2019-11-07 00:39:25,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:25,227 INFO L462 AbstractCegarLoop]: Abstraction has 574 states and 882 transitions. [2019-11-07 00:39:25,227 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 00:39:25,227 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 882 transitions. [2019-11-07 00:39:25,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-11-07 00:39:25,231 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:25,231 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:39:25,232 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:25,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:25,232 INFO L82 PathProgramCache]: Analyzing trace with hash -959612135, now seen corresponding path program 1 times [2019-11-07 00:39:25,232 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:25,233 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409167050] [2019-11-07 00:39:25,233 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:25,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:25,360 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-07 00:39:25,360 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409167050] [2019-11-07 00:39:25,360 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:25,361 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-07 00:39:25,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371425469] [2019-11-07 00:39:25,362 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 00:39:25,362 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:25,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 00:39:25,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-07 00:39:25,363 INFO L87 Difference]: Start difference. First operand 574 states and 882 transitions. Second operand 6 states. [2019-11-07 00:39:25,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:25,497 INFO L93 Difference]: Finished difference Result 1102 states and 1715 transitions. [2019-11-07 00:39:25,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 00:39:25,497 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 145 [2019-11-07 00:39:25,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:25,502 INFO L225 Difference]: With dead ends: 1102 [2019-11-07 00:39:25,502 INFO L226 Difference]: Without dead ends: 574 [2019-11-07 00:39:25,505 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:39:25,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2019-11-07 00:39:25,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 574. [2019-11-07 00:39:25,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 574 states. [2019-11-07 00:39:25,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 881 transitions. [2019-11-07 00:39:25,525 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 881 transitions. Word has length 145 [2019-11-07 00:39:25,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:25,525 INFO L462 AbstractCegarLoop]: Abstraction has 574 states and 881 transitions. [2019-11-07 00:39:25,525 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 00:39:25,526 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 881 transitions. [2019-11-07 00:39:25,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-11-07 00:39:25,529 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:25,529 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:39:25,530 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:25,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:25,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1451023870, now seen corresponding path program 1 times [2019-11-07 00:39:25,530 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:25,531 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331989862] [2019-11-07 00:39:25,531 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:25,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:25,707 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-07 00:39:25,707 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331989862] [2019-11-07 00:39:25,707 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:25,707 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2019-11-07 00:39:25,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253320439] [2019-11-07 00:39:25,708 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-07 00:39:25,708 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:25,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-07 00:39:25,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2019-11-07 00:39:25,709 INFO L87 Difference]: Start difference. First operand 574 states and 881 transitions. Second operand 12 states. [2019-11-07 00:39:25,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:25,958 INFO L93 Difference]: Finished difference Result 1108 states and 1725 transitions. [2019-11-07 00:39:25,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-07 00:39:25,959 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 146 [2019-11-07 00:39:25,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:25,964 INFO L225 Difference]: With dead ends: 1108 [2019-11-07 00:39:25,964 INFO L226 Difference]: Without dead ends: 581 [2019-11-07 00:39:25,968 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-11-07 00:39:25,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2019-11-07 00:39:25,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 579. [2019-11-07 00:39:25,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 579 states. [2019-11-07 00:39:25,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 887 transitions. [2019-11-07 00:39:25,993 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 887 transitions. Word has length 146 [2019-11-07 00:39:25,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:25,994 INFO L462 AbstractCegarLoop]: Abstraction has 579 states and 887 transitions. [2019-11-07 00:39:25,994 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-07 00:39:25,994 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 887 transitions. [2019-11-07 00:39:25,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-11-07 00:39:25,998 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:25,999 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:39:25,999 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:25,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:25,999 INFO L82 PathProgramCache]: Analyzing trace with hash 457980586, now seen corresponding path program 1 times [2019-11-07 00:39:26,000 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:26,000 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649958709] [2019-11-07 00:39:26,000 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:26,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:26,219 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-07 00:39:26,220 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649958709] [2019-11-07 00:39:26,220 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282702832] [2019-11-07 00:39:26,220 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 [2019-11-07 00:39:26,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:26,722 INFO L256 TraceCheckSpWp]: Trace formula consists of 2628 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 00:39:26,747 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:39:26,855 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-11-07 00:39:26,856 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:39:27,208 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-11-07 00:39:27,209 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:39:27,209 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10, 6] total 17 [2019-11-07 00:39:27,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277800341] [2019-11-07 00:39:27,212 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 00:39:27,212 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:27,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 00:39:27,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2019-11-07 00:39:27,213 INFO L87 Difference]: Start difference. First operand 579 states and 887 transitions. Second operand 5 states. [2019-11-07 00:39:28,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:28,248 INFO L93 Difference]: Finished difference Result 1113 states and 1758 transitions. [2019-11-07 00:39:28,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 00:39:28,249 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 147 [2019-11-07 00:39:28,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:28,254 INFO L225 Difference]: With dead ends: 1113 [2019-11-07 00:39:28,254 INFO L226 Difference]: Without dead ends: 587 [2019-11-07 00:39:28,258 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 294 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2019-11-07 00:39:28,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2019-11-07 00:39:28,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 587. [2019-11-07 00:39:28,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 587 states. [2019-11-07 00:39:28,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 900 transitions. [2019-11-07 00:39:28,283 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 900 transitions. Word has length 147 [2019-11-07 00:39:28,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:28,284 INFO L462 AbstractCegarLoop]: Abstraction has 587 states and 900 transitions. [2019-11-07 00:39:28,284 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 00:39:28,284 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 900 transitions. [2019-11-07 00:39:28,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-11-07 00:39:28,288 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:28,288 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:39:28,495 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:28,496 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:28,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:28,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1382783305, now seen corresponding path program 1 times [2019-11-07 00:39:28,497 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:28,497 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018242391] [2019-11-07 00:39:28,497 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:28,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:28,647 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2019-11-07 00:39:28,647 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018242391] [2019-11-07 00:39:28,647 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:28,648 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 00:39:28,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582705760] [2019-11-07 00:39:28,648 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 00:39:28,648 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:28,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 00:39:28,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 00:39:28,649 INFO L87 Difference]: Start difference. First operand 587 states and 900 transitions. Second operand 3 states. [2019-11-07 00:39:28,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:28,694 INFO L93 Difference]: Finished difference Result 1294 states and 1986 transitions. [2019-11-07 00:39:28,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 00:39:28,695 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 150 [2019-11-07 00:39:28,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:28,703 INFO L225 Difference]: With dead ends: 1294 [2019-11-07 00:39:28,703 INFO L226 Difference]: Without dead ends: 760 [2019-11-07 00:39:28,708 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 00:39:28,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2019-11-07 00:39:28,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 757. [2019-11-07 00:39:28,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 757 states. [2019-11-07 00:39:28,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 1135 transitions. [2019-11-07 00:39:28,750 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 1135 transitions. Word has length 150 [2019-11-07 00:39:28,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:28,751 INFO L462 AbstractCegarLoop]: Abstraction has 757 states and 1135 transitions. [2019-11-07 00:39:28,751 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 00:39:28,751 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 1135 transitions. [2019-11-07 00:39:28,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-11-07 00:39:28,755 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:28,756 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:39:28,756 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:28,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:28,757 INFO L82 PathProgramCache]: Analyzing trace with hash 2114750731, now seen corresponding path program 1 times [2019-11-07 00:39:28,757 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:28,757 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188453618] [2019-11-07 00:39:28,757 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:28,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:29,031 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-07 00:39:29,032 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188453618] [2019-11-07 00:39:29,032 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517927321] [2019-11-07 00:39:29,033 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 [2019-11-07 00:39:29,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:29,669 INFO L256 TraceCheckSpWp]: Trace formula consists of 2634 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 00:39:29,682 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:39:29,745 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-07 00:39:29,745 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:39:30,074 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-07 00:39:30,075 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:39:30,075 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6] total 13 [2019-11-07 00:39:30,076 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758526380] [2019-11-07 00:39:30,076 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 00:39:30,077 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:30,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 00:39:30,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2019-11-07 00:39:30,077 INFO L87 Difference]: Start difference. First operand 757 states and 1135 transitions. Second operand 5 states. [2019-11-07 00:39:30,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:30,980 INFO L93 Difference]: Finished difference Result 1477 states and 2286 transitions. [2019-11-07 00:39:30,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 00:39:30,981 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 150 [2019-11-07 00:39:30,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:30,986 INFO L225 Difference]: With dead ends: 1477 [2019-11-07 00:39:30,986 INFO L226 Difference]: Without dead ends: 773 [2019-11-07 00:39:30,992 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 290 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2019-11-07 00:39:30,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 773 states. [2019-11-07 00:39:31,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 773 to 773. [2019-11-07 00:39:31,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 773 states. [2019-11-07 00:39:31,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 1161 transitions. [2019-11-07 00:39:31,026 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 1161 transitions. Word has length 150 [2019-11-07 00:39:31,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:31,027 INFO L462 AbstractCegarLoop]: Abstraction has 773 states and 1161 transitions. [2019-11-07 00:39:31,027 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 00:39:31,027 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 1161 transitions. [2019-11-07 00:39:31,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-11-07 00:39:31,031 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:31,031 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:39:31,242 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:31,242 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:31,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:31,243 INFO L82 PathProgramCache]: Analyzing trace with hash 395684240, now seen corresponding path program 1 times [2019-11-07 00:39:31,243 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:31,243 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108206274] [2019-11-07 00:39:31,244 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:31,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:31,459 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-07 00:39:31,460 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108206274] [2019-11-07 00:39:31,460 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037154154] [2019-11-07 00:39:31,460 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 [2019-11-07 00:39:32,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:32,204 INFO L256 TraceCheckSpWp]: Trace formula consists of 2637 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 00:39:32,211 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:39:32,296 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-07 00:39:32,297 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:39:32,591 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-07 00:39:32,592 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:39:32,592 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10, 6] total 17 [2019-11-07 00:39:32,592 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054201744] [2019-11-07 00:39:32,593 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 00:39:32,593 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:32,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 00:39:32,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2019-11-07 00:39:32,594 INFO L87 Difference]: Start difference. First operand 773 states and 1161 transitions. Second operand 5 states. [2019-11-07 00:39:33,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:33,444 INFO L93 Difference]: Finished difference Result 1509 states and 2334 transitions. [2019-11-07 00:39:33,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 00:39:33,445 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 153 [2019-11-07 00:39:33,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:33,452 INFO L225 Difference]: With dead ends: 1509 [2019-11-07 00:39:33,452 INFO L226 Difference]: Without dead ends: 789 [2019-11-07 00:39:33,456 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 306 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2019-11-07 00:39:33,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2019-11-07 00:39:33,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 789. [2019-11-07 00:39:33,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 789 states. [2019-11-07 00:39:33,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 1187 transitions. [2019-11-07 00:39:33,490 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 1187 transitions. Word has length 153 [2019-11-07 00:39:33,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:33,491 INFO L462 AbstractCegarLoop]: Abstraction has 789 states and 1187 transitions. [2019-11-07 00:39:33,491 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 00:39:33,491 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 1187 transitions. [2019-11-07 00:39:33,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-11-07 00:39:33,496 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:33,496 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:39:33,711 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:33,712 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:33,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:33,712 INFO L82 PathProgramCache]: Analyzing trace with hash 110325351, now seen corresponding path program 1 times [2019-11-07 00:39:33,712 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:33,713 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208818923] [2019-11-07 00:39:33,713 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:33,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:33,919 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-11-07 00:39:33,919 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208818923] [2019-11-07 00:39:33,920 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056346742] [2019-11-07 00:39:33,920 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 [2019-11-07 00:39:34,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:34,558 INFO L256 TraceCheckSpWp]: Trace formula consists of 2640 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 00:39:34,567 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:39:34,651 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-11-07 00:39:34,652 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:39:34,948 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-11-07 00:39:34,948 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:39:34,949 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10, 6] total 16 [2019-11-07 00:39:34,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674318303] [2019-11-07 00:39:34,950 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 00:39:34,950 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:34,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 00:39:34,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2019-11-07 00:39:34,950 INFO L87 Difference]: Start difference. First operand 789 states and 1187 transitions. Second operand 5 states. [2019-11-07 00:39:35,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:35,871 INFO L93 Difference]: Finished difference Result 1541 states and 2382 transitions. [2019-11-07 00:39:35,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 00:39:35,871 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 156 [2019-11-07 00:39:35,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:35,878 INFO L225 Difference]: With dead ends: 1541 [2019-11-07 00:39:35,878 INFO L226 Difference]: Without dead ends: 805 [2019-11-07 00:39:35,883 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 312 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2019-11-07 00:39:35,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 805 states. [2019-11-07 00:39:35,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 805 to 805. [2019-11-07 00:39:35,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 805 states. [2019-11-07 00:39:35,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 805 states to 805 states and 1213 transitions. [2019-11-07 00:39:35,913 INFO L78 Accepts]: Start accepts. Automaton has 805 states and 1213 transitions. Word has length 156 [2019-11-07 00:39:35,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:35,914 INFO L462 AbstractCegarLoop]: Abstraction has 805 states and 1213 transitions. [2019-11-07 00:39:35,914 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 00:39:35,914 INFO L276 IsEmpty]: Start isEmpty. Operand 805 states and 1213 transitions. [2019-11-07 00:39:35,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-11-07 00:39:35,918 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:35,918 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:39:36,125 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:36,125 INFO L410 AbstractCegarLoop]: === Iteration 20 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:36,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:36,126 INFO L82 PathProgramCache]: Analyzing trace with hash -638133708, now seen corresponding path program 1 times [2019-11-07 00:39:36,126 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:36,127 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502280805] [2019-11-07 00:39:36,127 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:36,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:36,288 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-11-07 00:39:36,289 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502280805] [2019-11-07 00:39:36,289 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705123815] [2019-11-07 00:39:36,289 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 [2019-11-07 00:39:36,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:36,910 INFO L256 TraceCheckSpWp]: Trace formula consists of 2643 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-07 00:39:36,924 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:39:36,995 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:39:36,996 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:39:37,122 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-11-07 00:39:37,122 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:39:37,122 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [10] total 14 [2019-11-07 00:39:37,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932067351] [2019-11-07 00:39:37,123 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 00:39:37,123 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:37,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 00:39:37,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2019-11-07 00:39:37,124 INFO L87 Difference]: Start difference. First operand 805 states and 1213 transitions. Second operand 6 states. [2019-11-07 00:39:37,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:37,966 INFO L93 Difference]: Finished difference Result 2313 states and 3577 transitions. [2019-11-07 00:39:37,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:39:37,967 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 159 [2019-11-07 00:39:37,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:37,977 INFO L225 Difference]: With dead ends: 2313 [2019-11-07 00:39:37,977 INFO L226 Difference]: Without dead ends: 1562 [2019-11-07 00:39:37,981 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2019-11-07 00:39:37,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1562 states. [2019-11-07 00:39:38,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1562 to 1553. [2019-11-07 00:39:38,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1553 states. [2019-11-07 00:39:38,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1553 states to 1553 states and 2382 transitions. [2019-11-07 00:39:38,045 INFO L78 Accepts]: Start accepts. Automaton has 1553 states and 2382 transitions. Word has length 159 [2019-11-07 00:39:38,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:38,046 INFO L462 AbstractCegarLoop]: Abstraction has 1553 states and 2382 transitions. [2019-11-07 00:39:38,046 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 00:39:38,046 INFO L276 IsEmpty]: Start isEmpty. Operand 1553 states and 2382 transitions. [2019-11-07 00:39:38,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2019-11-07 00:39:38,051 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:38,051 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:39:38,261 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:38,262 INFO L410 AbstractCegarLoop]: === Iteration 21 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:38,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:38,262 INFO L82 PathProgramCache]: Analyzing trace with hash -842544841, now seen corresponding path program 1 times [2019-11-07 00:39:38,262 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:38,263 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103474587] [2019-11-07 00:39:38,263 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:38,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:38,420 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-11-07 00:39:38,420 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103474587] [2019-11-07 00:39:38,421 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901996570] [2019-11-07 00:39:38,421 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 [2019-11-07 00:39:39,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:39,063 INFO L256 TraceCheckSpWp]: Trace formula consists of 2660 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-07 00:39:39,071 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:39:39,099 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:39:39,099 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:39:39,219 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-11-07 00:39:39,220 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:39:39,220 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [10] total 11 [2019-11-07 00:39:39,220 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971217569] [2019-11-07 00:39:39,221 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 00:39:39,221 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:39,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 00:39:39,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2019-11-07 00:39:39,222 INFO L87 Difference]: Start difference. First operand 1553 states and 2382 transitions. Second operand 3 states. [2019-11-07 00:39:39,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:39,350 INFO L93 Difference]: Finished difference Result 3793 states and 5903 transitions. [2019-11-07 00:39:39,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 00:39:39,350 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 164 [2019-11-07 00:39:39,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:39,366 INFO L225 Difference]: With dead ends: 3793 [2019-11-07 00:39:39,366 INFO L226 Difference]: Without dead ends: 2296 [2019-11-07 00:39:39,374 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 337 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2019-11-07 00:39:39,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2296 states. [2019-11-07 00:39:39,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2296 to 1553. [2019-11-07 00:39:39,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1553 states. [2019-11-07 00:39:39,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1553 states to 1553 states and 2381 transitions. [2019-11-07 00:39:39,446 INFO L78 Accepts]: Start accepts. Automaton has 1553 states and 2381 transitions. Word has length 164 [2019-11-07 00:39:39,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:39,447 INFO L462 AbstractCegarLoop]: Abstraction has 1553 states and 2381 transitions. [2019-11-07 00:39:39,447 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 00:39:39,447 INFO L276 IsEmpty]: Start isEmpty. Operand 1553 states and 2381 transitions. [2019-11-07 00:39:39,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2019-11-07 00:39:39,452 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:39,452 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:39:39,660 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:39,660 INFO L410 AbstractCegarLoop]: === Iteration 22 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:39,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:39,660 INFO L82 PathProgramCache]: Analyzing trace with hash -418898119, now seen corresponding path program 1 times [2019-11-07 00:39:39,661 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:39,661 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697535864] [2019-11-07 00:39:39,661 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:39,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:39,832 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-11-07 00:39:39,832 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697535864] [2019-11-07 00:39:39,833 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122640040] [2019-11-07 00:39:39,833 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 [2019-11-07 00:39:40,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:40,344 INFO L256 TraceCheckSpWp]: Trace formula consists of 2659 conjuncts, 49 conjunts are in the unsatisfiable core [2019-11-07 00:39:40,348 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:39:40,438 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-07 00:39:40,438 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:39:40,903 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-11-07 00:39:40,904 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:39:40,904 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 10] total 21 [2019-11-07 00:39:40,904 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410086954] [2019-11-07 00:39:40,905 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-07 00:39:40,905 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:40,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-07 00:39:40,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2019-11-07 00:39:40,906 INFO L87 Difference]: Start difference. First operand 1553 states and 2381 transitions. Second operand 9 states. [2019-11-07 00:39:47,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:47,065 INFO L93 Difference]: Finished difference Result 4772 states and 7488 transitions. [2019-11-07 00:39:47,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-07 00:39:47,068 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 164 [2019-11-07 00:39:47,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:47,098 INFO L225 Difference]: With dead ends: 4772 [2019-11-07 00:39:47,098 INFO L226 Difference]: Without dead ends: 3272 [2019-11-07 00:39:47,111 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2019-11-07 00:39:47,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3272 states. [2019-11-07 00:39:47,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3272 to 3215. [2019-11-07 00:39:47,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3215 states.