/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_product23.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 00:39:18,478 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 00:39:18,481 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 00:39:18,493 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 00:39:18,494 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 00:39:18,495 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 00:39:18,496 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 00:39:18,498 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 00:39:18,500 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 00:39:18,501 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 00:39:18,502 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 00:39:18,503 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 00:39:18,504 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 00:39:18,505 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 00:39:18,505 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 00:39:18,507 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 00:39:18,507 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 00:39:18,508 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 00:39:18,510 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 00:39:18,512 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 00:39:18,514 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 00:39:18,515 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 00:39:18,516 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 00:39:18,517 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 00:39:18,520 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-07 00:39:18,520 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-07 00:39:18,520 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-07 00:39:18,521 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-07 00:39:18,522 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-07 00:39:18,523 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-07 00:39:18,523 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-07 00:39:18,524 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-07 00:39:18,525 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-07 00:39:18,526 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-07 00:39:18,527 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-07 00:39:18,527 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-07 00:39:18,528 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-07 00:39:18,528 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-07 00:39:18,528 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 00:39:18,529 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 00:39:18,530 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 00:39:18,531 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 00:39:18,556 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 00:39:18,556 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 00:39:18,559 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 00:39:18,559 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 00:39:18,560 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 00:39:18,560 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 00:39:18,560 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 00:39:18,560 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 00:39:18,560 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 00:39:18,561 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 00:39:18,562 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 00:39:18,562 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 00:39:18,562 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 00:39:18,563 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 00:39:18,563 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 00:39:18,563 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 00:39:18,563 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 00:39:18,563 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 00:39:18,564 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 00:39:18,564 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 00:39:18,564 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 00:39:18,564 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 00:39:18,565 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 00:39:18,565 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 00:39:18,565 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 00:39:18,565 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 00:39:18,566 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 00:39:18,566 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 00:39:18,566 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 00:39:18,891 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 00:39:18,913 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 00:39:18,917 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 00:39:18,918 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 00:39:18,919 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 00:39:18,919 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec14_product23.cil.c [2019-11-07 00:39:19,002 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d879599a3/9b4c24a42b1541df930f9aa68d53b704/FLAG95fe4130f [2019-11-07 00:39:19,639 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 00:39:19,640 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec14_product23.cil.c [2019-11-07 00:39:19,674 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d879599a3/9b4c24a42b1541df930f9aa68d53b704/FLAG95fe4130f [2019-11-07 00:39:19,789 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d879599a3/9b4c24a42b1541df930f9aa68d53b704 [2019-11-07 00:39:19,797 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 00:39:19,799 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 00:39:19,800 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 00:39:19,800 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 00:39:19,804 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 00:39:19,805 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:39:19" (1/1) ... [2019-11-07 00:39:19,808 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25f9a9b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:19, skipping insertion in model container [2019-11-07 00:39:19,808 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:39:19" (1/1) ... [2019-11-07 00:39:19,816 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 00:39:19,904 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 00:39:20,633 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 00:39:20,654 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 00:39:20,836 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 00:39:20,898 INFO L192 MainTranslator]: Completed translation [2019-11-07 00:39:20,898 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:20 WrapperNode [2019-11-07 00:39:20,898 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 00:39:20,899 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 00:39:20,899 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 00:39:20,900 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 00:39:20,914 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:20" (1/1) ... [2019-11-07 00:39:20,914 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:20" (1/1) ... [2019-11-07 00:39:20,947 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:20" (1/1) ... [2019-11-07 00:39:20,948 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:20" (1/1) ... [2019-11-07 00:39:21,044 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:20" (1/1) ... [2019-11-07 00:39:21,081 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:20" (1/1) ... [2019-11-07 00:39:21,092 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:20" (1/1) ... [2019-11-07 00:39:21,113 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 00:39:21,114 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 00:39:21,114 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 00:39:21,114 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 00:39:21,115 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:20" (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 00:39:21,199 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 00:39:21,200 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 00:39:21,200 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-11-07 00:39:21,200 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-11-07 00:39:21,200 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-11-07 00:39:21,201 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-11-07 00:39:21,201 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-11-07 00:39:21,201 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-11-07 00:39:21,201 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-11-07 00:39:21,202 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-11-07 00:39:21,202 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-11-07 00:39:21,202 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-11-07 00:39:21,202 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-11-07 00:39:21,202 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-11-07 00:39:21,203 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-11-07 00:39:21,203 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-11-07 00:39:21,203 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-11-07 00:39:21,203 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-11-07 00:39:21,204 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-11-07 00:39:21,204 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 00:39:21,204 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-11-07 00:39:21,205 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-11-07 00:39:21,205 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification14_spec__1 [2019-11-07 00:39:21,205 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-11-07 00:39:21,206 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-11-07 00:39:21,206 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-11-07 00:39:21,206 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-11-07 00:39:21,206 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-11-07 00:39:21,206 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-11-07 00:39:21,206 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-11-07 00:39:21,207 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-11-07 00:39:21,207 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-11-07 00:39:21,207 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-11-07 00:39:21,207 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-11-07 00:39:21,207 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-11-07 00:39:21,208 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-11-07 00:39:21,208 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-11-07 00:39:21,208 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-11-07 00:39:21,209 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-11-07 00:39:21,209 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-11-07 00:39:21,209 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-11-07 00:39:21,209 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-11-07 00:39:21,209 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-11-07 00:39:21,209 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-11-07 00:39:21,210 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-11-07 00:39:21,210 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-11-07 00:39:21,210 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-11-07 00:39:21,211 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-11-07 00:39:21,211 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-11-07 00:39:21,211 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-11-07 00:39:21,211 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-11-07 00:39:21,211 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-11-07 00:39:21,211 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-11-07 00:39:21,212 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-11-07 00:39:21,212 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2019-11-07 00:39:21,212 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__twothirdsfull [2019-11-07 00:39:21,212 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-11-07 00:39:21,212 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-11-07 00:39:21,212 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-11-07 00:39:21,213 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__weight [2019-11-07 00:39:21,213 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2019-11-07 00:39:21,213 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-11-07 00:39:21,214 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-11-07 00:39:21,214 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-11-07 00:39:21,214 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-11-07 00:39:21,214 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-11-07 00:39:21,215 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-11-07 00:39:21,215 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2019-11-07 00:39:21,215 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloor [2019-11-07 00:39:21,215 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-11-07 00:39:21,215 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-11-07 00:39:21,216 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-11-07 00:39:21,216 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-11-07 00:39:21,217 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-11-07 00:39:21,217 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-11-07 00:39:21,217 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-11-07 00:39:21,217 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-11-07 00:39:21,217 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 00:39:21,218 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 00:39:21,218 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-07 00:39:21,219 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-11-07 00:39:21,219 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-11-07 00:39:21,219 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-11-07 00:39:21,220 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-11-07 00:39:21,220 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-11-07 00:39:21,221 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-11-07 00:39:21,221 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-11-07 00:39:21,222 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-11-07 00:39:21,222 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-11-07 00:39:21,222 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-11-07 00:39:21,222 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-11-07 00:39:21,223 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-11-07 00:39:21,223 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-11-07 00:39:21,223 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-11-07 00:39:21,223 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-11-07 00:39:21,223 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-11-07 00:39:21,223 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-11-07 00:39:21,224 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-11-07 00:39:21,224 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-11-07 00:39:21,224 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-11-07 00:39:21,224 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-11-07 00:39:21,224 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-11-07 00:39:21,224 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-11-07 00:39:21,224 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-11-07 00:39:21,225 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-11-07 00:39:21,225 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-11-07 00:39:21,225 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-11-07 00:39:21,225 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 00:39:21,225 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-11-07 00:39:21,226 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-11-07 00:39:21,226 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-11-07 00:39:21,226 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-11-07 00:39:21,226 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-11-07 00:39:21,226 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-11-07 00:39:21,226 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2019-11-07 00:39:21,226 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloor [2019-11-07 00:39:21,227 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification14_spec__1 [2019-11-07 00:39:21,227 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-11-07 00:39:21,228 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-07 00:39:21,228 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-07 00:39:21,228 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-11-07 00:39:21,228 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-07 00:39:21,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-07 00:39:21,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 00:39:21,230 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-07 00:39:21,230 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-11-07 00:39:21,230 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 00:39:21,230 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-11-07 00:39:21,230 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-11-07 00:39:21,231 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 00:39:21,231 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-11-07 00:39:21,231 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-11-07 00:39:21,232 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 00:39:21,232 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-11-07 00:39:21,232 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-11-07 00:39:21,232 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-11-07 00:39:21,233 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-11-07 00:39:21,237 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-11-07 00:39:21,237 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-11-07 00:39:21,237 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-11-07 00:39:21,238 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-11-07 00:39:21,238 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-11-07 00:39:21,239 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-11-07 00:39:21,239 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-11-07 00:39:21,247 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-11-07 00:39:21,247 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-11-07 00:39:21,247 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-11-07 00:39:21,247 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-11-07 00:39:21,247 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-11-07 00:39:21,247 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-11-07 00:39:21,247 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-11-07 00:39:21,248 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-11-07 00:39:21,249 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-11-07 00:39:21,249 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-11-07 00:39:21,249 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-11-07 00:39:21,249 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2019-11-07 00:39:21,249 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__twothirdsfull [2019-11-07 00:39:21,250 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-11-07 00:39:21,250 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-11-07 00:39:21,250 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__weight [2019-11-07 00:39:21,250 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2019-11-07 00:39:21,250 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-11-07 00:39:21,250 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-11-07 00:39:21,250 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-11-07 00:39:21,250 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-11-07 00:39:21,251 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-11-07 00:39:21,251 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 00:39:21,251 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-07 00:39:21,251 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 00:39:23,801 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 00:39:23,801 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-11-07 00:39:23,803 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:39:23 BoogieIcfgContainer [2019-11-07 00:39:23,804 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 00:39:23,807 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 00:39:23,807 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 00:39:23,811 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 00:39:23,811 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:39:19" (1/3) ... [2019-11-07 00:39:23,812 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@274820de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:39:23, skipping insertion in model container [2019-11-07 00:39:23,812 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:20" (2/3) ... [2019-11-07 00:39:23,813 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@274820de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:39:23, skipping insertion in model container [2019-11-07 00:39:23,813 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:39:23" (3/3) ... [2019-11-07 00:39:23,815 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product23.cil.c [2019-11-07 00:39:23,826 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 00:39:23,838 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 00:39:23,850 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 00:39:23,893 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 00:39:23,893 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 00:39:23,893 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 00:39:23,893 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 00:39:23,894 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 00:39:23,894 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 00:39:23,894 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 00:39:23,894 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 00:39:23,937 INFO L276 IsEmpty]: Start isEmpty. Operand 766 states. [2019-11-07 00:39:23,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-11-07 00:39:23,982 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:23,984 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 00:39:23,987 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:23,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:23,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1117426819, now seen corresponding path program 1 times [2019-11-07 00:39:24,004 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:24,004 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365116217] [2019-11-07 00:39:24,005 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:24,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:24,691 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 00:39:24,691 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365116217] [2019-11-07 00:39:24,692 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:24,693 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 00:39:24,693 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550733812] [2019-11-07 00:39:24,699 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:39:24,701 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:24,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:39:24,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 00:39:24,718 INFO L87 Difference]: Start difference. First operand 766 states. Second operand 4 states. [2019-11-07 00:39:24,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:24,961 INFO L93 Difference]: Finished difference Result 1230 states and 1960 transitions. [2019-11-07 00:39:24,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:39:24,964 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 135 [2019-11-07 00:39:24,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:25,002 INFO L225 Difference]: With dead ends: 1230 [2019-11-07 00:39:25,002 INFO L226 Difference]: Without dead ends: 618 [2019-11-07 00:39:25,014 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 00:39:25,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2019-11-07 00:39:25,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 618. [2019-11-07 00:39:25,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 618 states. [2019-11-07 00:39:25,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 971 transitions. [2019-11-07 00:39:25,148 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 971 transitions. Word has length 135 [2019-11-07 00:39:25,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:25,149 INFO L462 AbstractCegarLoop]: Abstraction has 618 states and 971 transitions. [2019-11-07 00:39:25,149 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:39:25,149 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 971 transitions. [2019-11-07 00:39:25,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-11-07 00:39:25,157 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:25,158 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 00:39:25,158 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:25,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:25,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1099628587, now seen corresponding path program 1 times [2019-11-07 00:39:25,159 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:25,159 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863013852] [2019-11-07 00:39:25,159 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:25,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:25,372 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 00:39:25,373 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863013852] [2019-11-07 00:39:25,373 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:25,373 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 00:39:25,373 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160502838] [2019-11-07 00:39:25,375 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:39:25,376 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:25,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:39:25,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 00:39:25,377 INFO L87 Difference]: Start difference. First operand 618 states and 971 transitions. Second operand 4 states. [2019-11-07 00:39:25,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:25,514 INFO L93 Difference]: Finished difference Result 1203 states and 1903 transitions. [2019-11-07 00:39:25,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 00:39:25,514 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 136 [2019-11-07 00:39:25,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:25,523 INFO L225 Difference]: With dead ends: 1203 [2019-11-07 00:39:25,524 INFO L226 Difference]: Without dead ends: 618 [2019-11-07 00:39:25,530 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 00:39:25,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2019-11-07 00:39:25,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 618. [2019-11-07 00:39:25,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 618 states. [2019-11-07 00:39:25,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 970 transitions. [2019-11-07 00:39:25,594 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 970 transitions. Word has length 136 [2019-11-07 00:39:25,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:25,600 INFO L462 AbstractCegarLoop]: Abstraction has 618 states and 970 transitions. [2019-11-07 00:39:25,600 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:39:25,600 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 970 transitions. [2019-11-07 00:39:25,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-11-07 00:39:25,608 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:25,608 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 00:39:25,608 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:25,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:25,611 INFO L82 PathProgramCache]: Analyzing trace with hash 896519935, now seen corresponding path program 1 times [2019-11-07 00:39:25,612 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:25,612 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539006651] [2019-11-07 00:39:25,612 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:25,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:25,860 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 00:39:25,861 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539006651] [2019-11-07 00:39:25,861 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:25,861 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 00:39:25,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29322858] [2019-11-07 00:39:25,866 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:39:25,867 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:25,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:39:25,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 00:39:25,867 INFO L87 Difference]: Start difference. First operand 618 states and 970 transitions. Second operand 4 states. [2019-11-07 00:39:25,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:25,964 INFO L93 Difference]: Finished difference Result 1203 states and 1902 transitions. [2019-11-07 00:39:25,964 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 00:39:25,964 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 137 [2019-11-07 00:39:25,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:25,973 INFO L225 Difference]: With dead ends: 1203 [2019-11-07 00:39:25,973 INFO L226 Difference]: Without dead ends: 618 [2019-11-07 00:39:25,977 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 00:39:25,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2019-11-07 00:39:26,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 618. [2019-11-07 00:39:26,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 618 states. [2019-11-07 00:39:26,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 969 transitions. [2019-11-07 00:39:26,020 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 969 transitions. Word has length 137 [2019-11-07 00:39:26,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:26,020 INFO L462 AbstractCegarLoop]: Abstraction has 618 states and 969 transitions. [2019-11-07 00:39:26,020 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:39:26,021 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 969 transitions. [2019-11-07 00:39:26,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-11-07 00:39:26,026 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:26,027 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 00:39:26,027 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:26,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:26,028 INFO L82 PathProgramCache]: Analyzing trace with hash -756244441, now seen corresponding path program 1 times [2019-11-07 00:39:26,028 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:26,028 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529989954] [2019-11-07 00:39:26,028 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:26,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:26,212 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 00:39:26,213 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529989954] [2019-11-07 00:39:26,213 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:26,213 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 00:39:26,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841034146] [2019-11-07 00:39:26,215 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:39:26,215 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:26,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:39:26,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 00:39:26,216 INFO L87 Difference]: Start difference. First operand 618 states and 969 transitions. Second operand 4 states. [2019-11-07 00:39:26,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:26,305 INFO L93 Difference]: Finished difference Result 1203 states and 1901 transitions. [2019-11-07 00:39:26,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 00:39:26,306 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 138 [2019-11-07 00:39:26,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:26,312 INFO L225 Difference]: With dead ends: 1203 [2019-11-07 00:39:26,313 INFO L226 Difference]: Without dead ends: 618 [2019-11-07 00:39:26,316 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 00:39:26,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2019-11-07 00:39:26,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 618. [2019-11-07 00:39:26,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 618 states. [2019-11-07 00:39:26,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 968 transitions. [2019-11-07 00:39:26,348 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 968 transitions. Word has length 138 [2019-11-07 00:39:26,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:26,348 INFO L462 AbstractCegarLoop]: Abstraction has 618 states and 968 transitions. [2019-11-07 00:39:26,349 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:39:26,349 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 968 transitions. [2019-11-07 00:39:26,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2019-11-07 00:39:26,355 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:26,355 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 00:39:26,355 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:26,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:26,356 INFO L82 PathProgramCache]: Analyzing trace with hash -103696005, now seen corresponding path program 1 times [2019-11-07 00:39:26,356 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:26,357 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112048352] [2019-11-07 00:39:26,357 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:26,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:26,523 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 00:39:26,525 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112048352] [2019-11-07 00:39:26,526 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:26,526 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 00:39:26,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353153438] [2019-11-07 00:39:26,527 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:39:26,527 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:26,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:39:26,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 00:39:26,530 INFO L87 Difference]: Start difference. First operand 618 states and 968 transitions. Second operand 4 states. [2019-11-07 00:39:26,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:26,625 INFO L93 Difference]: Finished difference Result 1203 states and 1900 transitions. [2019-11-07 00:39:26,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 00:39:26,626 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 139 [2019-11-07 00:39:26,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:26,636 INFO L225 Difference]: With dead ends: 1203 [2019-11-07 00:39:26,637 INFO L226 Difference]: Without dead ends: 618 [2019-11-07 00:39:26,642 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 00:39:26,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2019-11-07 00:39:26,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 618. [2019-11-07 00:39:26,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 618 states. [2019-11-07 00:39:26,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 967 transitions. [2019-11-07 00:39:26,681 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 967 transitions. Word has length 139 [2019-11-07 00:39:26,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:26,682 INFO L462 AbstractCegarLoop]: Abstraction has 618 states and 967 transitions. [2019-11-07 00:39:26,682 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:39:26,682 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 967 transitions. [2019-11-07 00:39:26,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-11-07 00:39:26,689 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:26,690 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 00:39:26,690 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:26,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:26,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1000894429, now seen corresponding path program 1 times [2019-11-07 00:39:26,691 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:26,692 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343258977] [2019-11-07 00:39:26,694 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:26,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:27,068 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 00:39:27,068 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343258977] [2019-11-07 00:39:27,069 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:27,069 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2019-11-07 00:39:27,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35364184] [2019-11-07 00:39:27,070 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-07 00:39:27,070 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:27,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-07 00:39:27,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2019-11-07 00:39:27,071 INFO L87 Difference]: Start difference. First operand 618 states and 967 transitions. Second operand 10 states. [2019-11-07 00:39:27,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:27,265 INFO L93 Difference]: Finished difference Result 1208 states and 1907 transitions. [2019-11-07 00:39:27,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-07 00:39:27,266 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 140 [2019-11-07 00:39:27,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:27,272 INFO L225 Difference]: With dead ends: 1208 [2019-11-07 00:39:27,272 INFO L226 Difference]: Without dead ends: 627 [2019-11-07 00:39:27,276 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 00:39:27,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2019-11-07 00:39:27,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 625. [2019-11-07 00:39:27,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 625 states. [2019-11-07 00:39:27,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 977 transitions. [2019-11-07 00:39:27,310 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 977 transitions. Word has length 140 [2019-11-07 00:39:27,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:27,311 INFO L462 AbstractCegarLoop]: Abstraction has 625 states and 977 transitions. [2019-11-07 00:39:27,311 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-07 00:39:27,311 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 977 transitions. [2019-11-07 00:39:27,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-11-07 00:39:27,317 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:27,317 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 00:39:27,317 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:27,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:27,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1987477118, now seen corresponding path program 1 times [2019-11-07 00:39:27,318 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:27,318 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39088398] [2019-11-07 00:39:27,318 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:27,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:27,441 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 00:39:27,441 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39088398] [2019-11-07 00:39:27,441 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:27,442 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 00:39:27,442 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096482945] [2019-11-07 00:39:27,442 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:39:27,443 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:27,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:39:27,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 00:39:27,443 INFO L87 Difference]: Start difference. First operand 625 states and 977 transitions. Second operand 4 states. [2019-11-07 00:39:27,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:27,508 INFO L93 Difference]: Finished difference Result 1209 states and 1908 transitions. [2019-11-07 00:39:27,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:39:27,509 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 140 [2019-11-07 00:39:27,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:27,514 INFO L225 Difference]: With dead ends: 1209 [2019-11-07 00:39:27,514 INFO L226 Difference]: Without dead ends: 621 [2019-11-07 00:39:27,518 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 00:39:27,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2019-11-07 00:39:27,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 621. [2019-11-07 00:39:27,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 621 states. [2019-11-07 00:39:27,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 970 transitions. [2019-11-07 00:39:27,541 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 970 transitions. Word has length 140 [2019-11-07 00:39:27,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:27,542 INFO L462 AbstractCegarLoop]: Abstraction has 621 states and 970 transitions. [2019-11-07 00:39:27,542 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:39:27,542 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 970 transitions. [2019-11-07 00:39:27,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-11-07 00:39:27,547 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:27,547 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 00:39:27,548 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:27,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:27,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1145901007, now seen corresponding path program 1 times [2019-11-07 00:39:27,548 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:27,549 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737543846] [2019-11-07 00:39:27,549 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:27,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:27,757 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 00:39:27,758 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737543846] [2019-11-07 00:39:27,758 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:27,758 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-07 00:39:27,758 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255928029] [2019-11-07 00:39:27,759 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 00:39:27,759 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:27,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 00:39:27,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-07 00:39:27,760 INFO L87 Difference]: Start difference. First operand 621 states and 970 transitions. Second operand 6 states. [2019-11-07 00:39:28,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:28,080 INFO L93 Difference]: Finished difference Result 1222 states and 1932 transitions. [2019-11-07 00:39:28,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-07 00:39:28,080 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 141 [2019-11-07 00:39:28,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:28,087 INFO L225 Difference]: With dead ends: 1222 [2019-11-07 00:39:28,087 INFO L226 Difference]: Without dead ends: 629 [2019-11-07 00:39:28,092 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 00:39:28,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2019-11-07 00:39:28,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 626. [2019-11-07 00:39:28,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 626 states. [2019-11-07 00:39:28,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 971 transitions. [2019-11-07 00:39:28,122 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 971 transitions. Word has length 141 [2019-11-07 00:39:28,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:28,123 INFO L462 AbstractCegarLoop]: Abstraction has 626 states and 971 transitions. [2019-11-07 00:39:28,123 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 00:39:28,123 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 971 transitions. [2019-11-07 00:39:28,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-11-07 00:39:28,129 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:28,129 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 00:39:28,130 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:28,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:28,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1935329146, now seen corresponding path program 1 times [2019-11-07 00:39:28,130 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:28,131 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440956753] [2019-11-07 00:39:28,131 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:28,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:28,306 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 00:39:28,306 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440956753] [2019-11-07 00:39:28,307 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:28,307 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-07 00:39:28,307 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375406200] [2019-11-07 00:39:28,308 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 00:39:28,308 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:28,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 00:39:28,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-07 00:39:28,309 INFO L87 Difference]: Start difference. First operand 626 states and 971 transitions. Second operand 6 states. [2019-11-07 00:39:28,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:28,615 INFO L93 Difference]: Finished difference Result 1185 states and 1847 transitions. [2019-11-07 00:39:28,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 00:39:28,616 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 142 [2019-11-07 00:39:28,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:28,621 INFO L225 Difference]: With dead ends: 1185 [2019-11-07 00:39:28,622 INFO L226 Difference]: Without dead ends: 626 [2019-11-07 00:39:28,625 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 00:39:28,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2019-11-07 00:39:28,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 626. [2019-11-07 00:39:28,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 626 states. [2019-11-07 00:39:28,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 967 transitions. [2019-11-07 00:39:28,648 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 967 transitions. Word has length 142 [2019-11-07 00:39:28,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:28,649 INFO L462 AbstractCegarLoop]: Abstraction has 626 states and 967 transitions. [2019-11-07 00:39:28,649 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 00:39:28,649 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 967 transitions. [2019-11-07 00:39:28,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2019-11-07 00:39:28,654 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:28,655 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 00:39:28,655 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:28,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:28,655 INFO L82 PathProgramCache]: Analyzing trace with hash 210411572, now seen corresponding path program 1 times [2019-11-07 00:39:28,656 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:28,656 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603962309] [2019-11-07 00:39:28,656 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:28,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:28,798 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 00:39:28,799 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603962309] [2019-11-07 00:39:28,799 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:28,799 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-07 00:39:28,799 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285895668] [2019-11-07 00:39:28,800 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 00:39:28,800 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:28,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 00:39:28,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-07 00:39:28,801 INFO L87 Difference]: Start difference. First operand 626 states and 967 transitions. Second operand 6 states. [2019-11-07 00:39:29,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:29,040 INFO L93 Difference]: Finished difference Result 1185 states and 1843 transitions. [2019-11-07 00:39:29,040 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 00:39:29,041 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 143 [2019-11-07 00:39:29,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:29,046 INFO L225 Difference]: With dead ends: 1185 [2019-11-07 00:39:29,047 INFO L226 Difference]: Without dead ends: 626 [2019-11-07 00:39:29,051 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 00:39:29,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2019-11-07 00:39:29,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 626. [2019-11-07 00:39:29,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 626 states. [2019-11-07 00:39:29,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 963 transitions. [2019-11-07 00:39:29,126 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 963 transitions. Word has length 143 [2019-11-07 00:39:29,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:29,127 INFO L462 AbstractCegarLoop]: Abstraction has 626 states and 963 transitions. [2019-11-07 00:39:29,127 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 00:39:29,127 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 963 transitions. [2019-11-07 00:39:29,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2019-11-07 00:39:29,134 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:29,134 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 00:39:29,134 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:29,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:29,135 INFO L82 PathProgramCache]: Analyzing trace with hash 487742644, now seen corresponding path program 1 times [2019-11-07 00:39:29,135 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:29,135 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845647019] [2019-11-07 00:39:29,136 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:29,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:29,302 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 00:39:29,303 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845647019] [2019-11-07 00:39:29,303 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:29,303 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-07 00:39:29,303 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759422757] [2019-11-07 00:39:29,304 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 00:39:29,304 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:29,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 00:39:29,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:39:29,305 INFO L87 Difference]: Start difference. First operand 626 states and 963 transitions. Second operand 7 states. [2019-11-07 00:39:29,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:29,417 INFO L93 Difference]: Finished difference Result 1188 states and 1843 transitions. [2019-11-07 00:39:29,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:39:29,418 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 143 [2019-11-07 00:39:29,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:29,423 INFO L225 Difference]: With dead ends: 1188 [2019-11-07 00:39:29,423 INFO L226 Difference]: Without dead ends: 608 [2019-11-07 00:39:29,427 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 00:39:29,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2019-11-07 00:39:29,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 605. [2019-11-07 00:39:29,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 605 states. [2019-11-07 00:39:29,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 926 transitions. [2019-11-07 00:39:29,451 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 926 transitions. Word has length 143 [2019-11-07 00:39:29,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:29,452 INFO L462 AbstractCegarLoop]: Abstraction has 605 states and 926 transitions. [2019-11-07 00:39:29,452 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 00:39:29,452 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 926 transitions. [2019-11-07 00:39:29,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-11-07 00:39:29,457 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:29,458 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 00:39:29,458 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:29,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:29,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1183492043, now seen corresponding path program 1 times [2019-11-07 00:39:29,459 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:29,459 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835067629] [2019-11-07 00:39:29,459 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:29,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:29,594 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 00:39:29,595 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835067629] [2019-11-07 00:39:29,595 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:29,595 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-07 00:39:29,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960773719] [2019-11-07 00:39:29,596 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 00:39:29,596 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:29,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 00:39:29,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-07 00:39:29,597 INFO L87 Difference]: Start difference. First operand 605 states and 926 transitions. Second operand 6 states. [2019-11-07 00:39:29,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:29,728 INFO L93 Difference]: Finished difference Result 1164 states and 1802 transitions. [2019-11-07 00:39:29,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 00:39:29,729 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 144 [2019-11-07 00:39:29,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:29,734 INFO L225 Difference]: With dead ends: 1164 [2019-11-07 00:39:29,735 INFO L226 Difference]: Without dead ends: 605 [2019-11-07 00:39:29,738 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 00:39:29,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2019-11-07 00:39:29,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 605. [2019-11-07 00:39:29,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 605 states. [2019-11-07 00:39:29,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 925 transitions. [2019-11-07 00:39:29,759 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 925 transitions. Word has length 144 [2019-11-07 00:39:29,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:29,759 INFO L462 AbstractCegarLoop]: Abstraction has 605 states and 925 transitions. [2019-11-07 00:39:29,760 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 00:39:29,760 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 925 transitions. [2019-11-07 00:39:29,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-11-07 00:39:29,764 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:29,765 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 00:39:29,765 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:29,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:29,765 INFO L82 PathProgramCache]: Analyzing trace with hash 163843225, now seen corresponding path program 1 times [2019-11-07 00:39:29,766 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:29,766 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140617228] [2019-11-07 00:39:29,766 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:29,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:29,901 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 00:39:29,902 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140617228] [2019-11-07 00:39:29,902 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:29,902 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-07 00:39:29,902 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206338468] [2019-11-07 00:39:29,903 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 00:39:29,903 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:29,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 00:39:29,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-07 00:39:29,904 INFO L87 Difference]: Start difference. First operand 605 states and 925 transitions. Second operand 6 states. [2019-11-07 00:39:30,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:30,032 INFO L93 Difference]: Finished difference Result 1164 states and 1801 transitions. [2019-11-07 00:39:30,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 00:39:30,032 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 145 [2019-11-07 00:39:30,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:30,037 INFO L225 Difference]: With dead ends: 1164 [2019-11-07 00:39:30,038 INFO L226 Difference]: Without dead ends: 605 [2019-11-07 00:39:30,041 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 00:39:30,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2019-11-07 00:39:30,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 605. [2019-11-07 00:39:30,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 605 states. [2019-11-07 00:39:30,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 924 transitions. [2019-11-07 00:39:30,062 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 924 transitions. Word has length 145 [2019-11-07 00:39:30,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:30,062 INFO L462 AbstractCegarLoop]: Abstraction has 605 states and 924 transitions. [2019-11-07 00:39:30,062 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 00:39:30,062 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 924 transitions. [2019-11-07 00:39:30,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-11-07 00:39:30,067 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:30,068 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 00:39:30,068 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:30,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:30,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1794095888, now seen corresponding path program 1 times [2019-11-07 00:39:30,069 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:30,069 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321061237] [2019-11-07 00:39:30,069 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:30,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:30,295 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 00:39:30,295 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321061237] [2019-11-07 00:39:30,295 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:30,296 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2019-11-07 00:39:30,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330772702] [2019-11-07 00:39:30,298 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-07 00:39:30,299 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:30,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-07 00:39:30,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2019-11-07 00:39:30,299 INFO L87 Difference]: Start difference. First operand 605 states and 924 transitions. Second operand 12 states. [2019-11-07 00:39:30,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:30,659 INFO L93 Difference]: Finished difference Result 1170 states and 1811 transitions. [2019-11-07 00:39:30,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-07 00:39:30,659 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 146 [2019-11-07 00:39:30,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:30,665 INFO L225 Difference]: With dead ends: 1170 [2019-11-07 00:39:30,665 INFO L226 Difference]: Without dead ends: 612 [2019-11-07 00:39:30,669 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-11-07 00:39:30,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2019-11-07 00:39:30,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 610. [2019-11-07 00:39:30,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 610 states. [2019-11-07 00:39:30,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 930 transitions. [2019-11-07 00:39:30,706 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 930 transitions. Word has length 146 [2019-11-07 00:39:30,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:30,708 INFO L462 AbstractCegarLoop]: Abstraction has 610 states and 930 transitions. [2019-11-07 00:39:30,708 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-07 00:39:30,708 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 930 transitions. [2019-11-07 00:39:30,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-11-07 00:39:30,713 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:30,713 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 00:39:30,714 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:30,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:30,714 INFO L82 PathProgramCache]: Analyzing trace with hash 114192712, now seen corresponding path program 1 times [2019-11-07 00:39:30,714 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:30,715 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482437138] [2019-11-07 00:39:30,715 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:30,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:30,903 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 00:39:30,904 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482437138] [2019-11-07 00:39:30,904 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986369218] [2019-11-07 00:39:30,904 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 00:39:31,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:31,447 INFO L256 TraceCheckSpWp]: Trace formula consists of 2631 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 00:39:31,466 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:39:31,616 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 00:39:31,617 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:39:31,989 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 00:39:31,989 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:39:31,990 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10, 6] total 17 [2019-11-07 00:39:31,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977747568] [2019-11-07 00:39:31,992 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 00:39:31,992 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:31,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 00:39:31,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2019-11-07 00:39:31,993 INFO L87 Difference]: Start difference. First operand 610 states and 930 transitions. Second operand 5 states. [2019-11-07 00:39:33,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:33,095 INFO L93 Difference]: Finished difference Result 1175 states and 1847 transitions. [2019-11-07 00:39:33,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 00:39:33,096 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 147 [2019-11-07 00:39:33,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:33,104 INFO L225 Difference]: With dead ends: 1175 [2019-11-07 00:39:33,104 INFO L226 Difference]: Without dead ends: 618 [2019-11-07 00:39:33,117 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 00:39:33,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2019-11-07 00:39:33,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 618. [2019-11-07 00:39:33,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 618 states. [2019-11-07 00:39:33,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 943 transitions. [2019-11-07 00:39:33,160 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 943 transitions. Word has length 147 [2019-11-07 00:39:33,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:33,160 INFO L462 AbstractCegarLoop]: Abstraction has 618 states and 943 transitions. [2019-11-07 00:39:33,161 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 00:39:33,161 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 943 transitions. [2019-11-07 00:39:33,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-11-07 00:39:33,168 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:33,169 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 00:39:33,388 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:33,388 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:33,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:33,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1841294517, now seen corresponding path program 1 times [2019-11-07 00:39:33,390 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:33,390 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843156442] [2019-11-07 00:39:33,390 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:33,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:33,677 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 00:39:33,677 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843156442] [2019-11-07 00:39:33,678 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792348628] [2019-11-07 00:39:33,678 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 00:39:34,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:34,365 INFO L256 TraceCheckSpWp]: Trace formula consists of 2634 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 00:39:34,380 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:39:34,452 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 00:39:34,453 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:39:34,747 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 00:39:34,747 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:39:34,748 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6] total 13 [2019-11-07 00:39:34,748 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478185264] [2019-11-07 00:39:34,748 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 00:39:34,749 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:34,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 00:39:34,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2019-11-07 00:39:34,749 INFO L87 Difference]: Start difference. First operand 618 states and 943 transitions. Second operand 5 states. [2019-11-07 00:39:35,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:35,652 INFO L93 Difference]: Finished difference Result 1191 states and 1870 transitions. [2019-11-07 00:39:35,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 00:39:35,653 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 150 [2019-11-07 00:39:35,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:35,662 INFO L225 Difference]: With dead ends: 1191 [2019-11-07 00:39:35,662 INFO L226 Difference]: Without dead ends: 626 [2019-11-07 00:39:35,669 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 00:39:35,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2019-11-07 00:39:35,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 626. [2019-11-07 00:39:35,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 626 states. [2019-11-07 00:39:35,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 956 transitions. [2019-11-07 00:39:35,705 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 956 transitions. Word has length 150 [2019-11-07 00:39:35,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:35,706 INFO L462 AbstractCegarLoop]: Abstraction has 626 states and 956 transitions. [2019-11-07 00:39:35,706 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 00:39:35,706 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 956 transitions. [2019-11-07 00:39:35,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-11-07 00:39:35,714 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:35,714 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 00:39:35,924 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:35,925 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:35,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:35,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1337110188, now seen corresponding path program 1 times [2019-11-07 00:39:35,926 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:35,926 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011596465] [2019-11-07 00:39:35,926 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:35,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:36,195 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 00:39:36,196 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011596465] [2019-11-07 00:39:36,196 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474818344] [2019-11-07 00:39:36,196 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 00:39:36,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:36,871 INFO L256 TraceCheckSpWp]: Trace formula consists of 2637 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 00:39:36,890 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:39:37,007 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 00:39:37,007 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:39:37,317 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 00:39:37,317 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:39:37,317 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10, 6] total 17 [2019-11-07 00:39:37,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120093430] [2019-11-07 00:39:37,318 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 00:39:37,319 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:37,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 00:39:37,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2019-11-07 00:39:37,319 INFO L87 Difference]: Start difference. First operand 626 states and 956 transitions. Second operand 5 states. [2019-11-07 00:39:38,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:38,212 INFO L93 Difference]: Finished difference Result 1207 states and 1893 transitions. [2019-11-07 00:39:38,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 00:39:38,213 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 153 [2019-11-07 00:39:38,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:38,219 INFO L225 Difference]: With dead ends: 1207 [2019-11-07 00:39:38,219 INFO L226 Difference]: Without dead ends: 634 [2019-11-07 00:39:38,224 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 306 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2019-11-07 00:39:38,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2019-11-07 00:39:38,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 634. [2019-11-07 00:39:38,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 634 states. [2019-11-07 00:39:38,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 969 transitions. [2019-11-07 00:39:38,250 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 969 transitions. Word has length 153 [2019-11-07 00:39:38,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:38,251 INFO L462 AbstractCegarLoop]: Abstraction has 634 states and 969 transitions. [2019-11-07 00:39:38,251 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 00:39:38,251 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 969 transitions. [2019-11-07 00:39:38,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-11-07 00:39:38,256 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:38,256 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 00:39:38,469 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:38,469 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:38,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:38,470 INFO L82 PathProgramCache]: Analyzing trace with hash -938944175, now seen corresponding path program 1 times [2019-11-07 00:39:38,470 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:38,470 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883903737] [2019-11-07 00:39:38,470 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:38,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:38,667 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 00:39:38,667 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883903737] [2019-11-07 00:39:38,668 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972127335] [2019-11-07 00:39:38,668 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 00:39:39,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:39,291 INFO L256 TraceCheckSpWp]: Trace formula consists of 2640 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 00:39:39,303 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:39:39,383 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 00:39:39,383 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:39:39,670 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 00:39:39,671 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:39:39,671 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10, 6] total 16 [2019-11-07 00:39:39,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69561293] [2019-11-07 00:39:39,672 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 00:39:39,672 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:39,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 00:39:39,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2019-11-07 00:39:39,673 INFO L87 Difference]: Start difference. First operand 634 states and 969 transitions. Second operand 5 states. [2019-11-07 00:39:40,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:40,541 INFO L93 Difference]: Finished difference Result 1223 states and 1916 transitions. [2019-11-07 00:39:40,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 00:39:40,541 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 156 [2019-11-07 00:39:40,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:40,547 INFO L225 Difference]: With dead ends: 1223 [2019-11-07 00:39:40,547 INFO L226 Difference]: Without dead ends: 642 [2019-11-07 00:39:40,551 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 00:39:40,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2019-11-07 00:39:40,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 642. [2019-11-07 00:39:40,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 642 states. [2019-11-07 00:39:40,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 982 transitions. [2019-11-07 00:39:40,580 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 982 transitions. Word has length 156 [2019-11-07 00:39:40,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:40,581 INFO L462 AbstractCegarLoop]: Abstraction has 642 states and 982 transitions. [2019-11-07 00:39:40,581 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 00:39:40,582 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 982 transitions. [2019-11-07 00:39:40,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-11-07 00:39:40,587 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:40,587 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 00:39:40,795 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:40,795 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:40,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:40,796 INFO L82 PathProgramCache]: Analyzing trace with hash 427669008, now seen corresponding path program 1 times [2019-11-07 00:39:40,797 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:40,797 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310963048] [2019-11-07 00:39:40,798 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:40,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:40,967 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 00:39:40,967 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310963048] [2019-11-07 00:39:40,968 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129902041] [2019-11-07 00:39:40,968 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 00:39:41,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:41,562 INFO L256 TraceCheckSpWp]: Trace formula consists of 2643 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-07 00:39:41,568 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:39:41,647 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 00:39:41,647 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:39:41,759 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 00:39:41,759 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:39:41,760 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [10] total 14 [2019-11-07 00:39:41,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308213570] [2019-11-07 00:39:41,761 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 00:39:41,761 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:41,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 00:39:41,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2019-11-07 00:39:41,761 INFO L87 Difference]: Start difference. First operand 642 states and 982 transitions. Second operand 6 states. [2019-11-07 00:39:42,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:42,598 INFO L93 Difference]: Finished difference Result 1826 states and 2878 transitions. [2019-11-07 00:39:42,599 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:39:42,599 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 159 [2019-11-07 00:39:42,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:42,616 INFO L225 Difference]: With dead ends: 1826 [2019-11-07 00:39:42,616 INFO L226 Difference]: Without dead ends: 1237 [2019-11-07 00:39:42,622 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 00:39:42,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1237 states. [2019-11-07 00:39:42,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1237 to 1228. [2019-11-07 00:39:42,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1228 states. [2019-11-07 00:39:42,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1228 states to 1228 states and 1917 transitions. [2019-11-07 00:39:42,713 INFO L78 Accepts]: Start accepts. Automaton has 1228 states and 1917 transitions. Word has length 159 [2019-11-07 00:39:42,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:42,714 INFO L462 AbstractCegarLoop]: Abstraction has 1228 states and 1917 transitions. [2019-11-07 00:39:42,714 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 00:39:42,714 INFO L276 IsEmpty]: Start isEmpty. Operand 1228 states and 1917 transitions. [2019-11-07 00:39:42,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2019-11-07 00:39:42,719 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:42,720 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 00:39:42,927 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:42,927 INFO L410 AbstractCegarLoop]: === Iteration 20 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:42,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:42,928 INFO L82 PathProgramCache]: Analyzing trace with hash -319977560, now seen corresponding path program 1 times [2019-11-07 00:39:42,928 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:42,928 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026163061] [2019-11-07 00:39:42,928 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:42,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:43,108 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 00:39:43,109 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026163061] [2019-11-07 00:39:43,109 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241290408] [2019-11-07 00:39:43,109 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 00:39:43,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:43,611 INFO L256 TraceCheckSpWp]: Trace formula consists of 2660 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-07 00:39:43,620 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:39:43,649 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 00:39:43,649 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:39:43,809 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 00:39:43,810 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:39:43,810 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [10] total 11 [2019-11-07 00:39:43,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722216955] [2019-11-07 00:39:43,811 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 00:39:43,811 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:43,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 00:39:43,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2019-11-07 00:39:43,812 INFO L87 Difference]: Start difference. First operand 1228 states and 1917 transitions. Second operand 3 states. [2019-11-07 00:39:43,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:43,942 INFO L93 Difference]: Finished difference Result 2983 states and 4733 transitions. [2019-11-07 00:39:43,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 00:39:43,942 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 164 [2019-11-07 00:39:43,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:43,956 INFO L225 Difference]: With dead ends: 2983 [2019-11-07 00:39:43,956 INFO L226 Difference]: Without dead ends: 1809 [2019-11-07 00:39:43,962 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 00:39:43,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1809 states. [2019-11-07 00:39:44,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1809 to 1228. [2019-11-07 00:39:44,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1228 states. [2019-11-07 00:39:44,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1228 states to 1228 states and 1916 transitions. [2019-11-07 00:39:44,041 INFO L78 Accepts]: Start accepts. Automaton has 1228 states and 1916 transitions. Word has length 164 [2019-11-07 00:39:44,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:44,043 INFO L462 AbstractCegarLoop]: Abstraction has 1228 states and 1916 transitions. [2019-11-07 00:39:44,043 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 00:39:44,043 INFO L276 IsEmpty]: Start isEmpty. Operand 1228 states and 1916 transitions. [2019-11-07 00:39:44,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2019-11-07 00:39:44,048 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:44,049 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 00:39:44,258 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:44,258 INFO L410 AbstractCegarLoop]: === Iteration 21 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:44,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:44,259 INFO L82 PathProgramCache]: Analyzing trace with hash 103669162, now seen corresponding path program 1 times [2019-11-07 00:39:44,259 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:44,259 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468912090] [2019-11-07 00:39:44,259 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:44,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:44,462 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 00:39:44,463 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468912090] [2019-11-07 00:39:44,463 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071929918] [2019-11-07 00:39:44,463 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 00:39:44,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:44,979 INFO L256 TraceCheckSpWp]: Trace formula consists of 2659 conjuncts, 49 conjunts are in the unsatisfiable core [2019-11-07 00:39:44,995 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:39:45,098 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 00:39:45,099 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:39:45,497 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 00:39:45,497 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:39:45,498 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 10] total 21 [2019-11-07 00:39:45,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209868597] [2019-11-07 00:39:45,498 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-07 00:39:45,498 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:45,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-07 00:39:45,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2019-11-07 00:39:45,499 INFO L87 Difference]: Start difference. First operand 1228 states and 1916 transitions. Second operand 9 states.