/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_spec3_product31.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 00:44:19,938 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 00:44:19,941 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 00:44:19,953 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 00:44:19,953 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 00:44:19,954 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 00:44:19,956 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 00:44:19,958 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 00:44:19,959 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 00:44:19,960 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 00:44:19,961 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 00:44:19,963 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 00:44:19,963 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 00:44:19,964 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 00:44:19,965 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 00:44:19,966 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 00:44:19,967 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 00:44:19,968 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 00:44:19,970 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 00:44:19,972 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 00:44:19,974 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 00:44:19,975 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 00:44:19,977 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 00:44:19,978 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 00:44:19,980 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-07 00:44:19,981 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-07 00:44:19,981 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-07 00:44:19,982 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-07 00:44:19,982 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-07 00:44:19,983 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-07 00:44:19,984 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-07 00:44:19,985 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-07 00:44:19,985 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-07 00:44:19,986 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-07 00:44:19,987 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-07 00:44:19,988 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-07 00:44:19,989 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-07 00:44:19,989 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-07 00:44:19,989 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 00:44:19,990 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 00:44:19,991 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 00:44:19,992 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 00:44:20,007 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 00:44:20,007 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 00:44:20,008 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 00:44:20,009 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 00:44:20,009 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 00:44:20,009 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 00:44:20,009 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 00:44:20,009 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 00:44:20,010 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 00:44:20,010 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 00:44:20,010 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 00:44:20,010 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 00:44:20,010 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 00:44:20,011 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 00:44:20,011 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 00:44:20,011 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 00:44:20,011 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 00:44:20,011 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 00:44:20,012 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 00:44:20,014 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 00:44:20,014 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 00:44:20,014 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 00:44:20,015 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 00:44:20,015 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 00:44:20,015 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 00:44:20,015 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 00:44:20,015 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 00:44:20,015 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 00:44:20,016 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 00:44:20,315 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 00:44:20,329 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 00:44:20,333 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 00:44:20,334 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 00:44:20,335 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 00:44:20,335 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec3_product31.cil.c [2019-11-07 00:44:20,415 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0202e9967/9dd76de016a242578e22ccc84d662beb/FLAGe1325cc89 [2019-11-07 00:44:21,058 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 00:44:21,060 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec3_product31.cil.c [2019-11-07 00:44:21,099 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0202e9967/9dd76de016a242578e22ccc84d662beb/FLAGe1325cc89 [2019-11-07 00:44:21,215 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0202e9967/9dd76de016a242578e22ccc84d662beb [2019-11-07 00:44:21,226 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 00:44:21,228 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 00:44:21,230 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 00:44:21,230 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 00:44:21,234 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 00:44:21,235 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:44:21" (1/1) ... [2019-11-07 00:44:21,238 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c71516c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:44:21, skipping insertion in model container [2019-11-07 00:44:21,238 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:44:21" (1/1) ... [2019-11-07 00:44:21,247 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 00:44:21,329 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 00:44:22,074 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 00:44:22,094 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 00:44:22,291 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 00:44:22,360 INFO L192 MainTranslator]: Completed translation [2019-11-07 00:44:22,361 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:44:22 WrapperNode [2019-11-07 00:44:22,361 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 00:44:22,362 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 00:44:22,362 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 00:44:22,362 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 00:44:22,377 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:44:22" (1/1) ... [2019-11-07 00:44:22,378 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:44:22" (1/1) ... [2019-11-07 00:44:22,408 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:44:22" (1/1) ... [2019-11-07 00:44:22,409 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:44:22" (1/1) ... [2019-11-07 00:44:22,501 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:44:22" (1/1) ... [2019-11-07 00:44:22,541 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:44:22" (1/1) ... [2019-11-07 00:44:22,552 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:44:22" (1/1) ... [2019-11-07 00:44:22,573 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 00:44:22,574 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 00:44:22,574 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 00:44:22,574 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 00:44:22,575 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:44:22" (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 00:44:22,664 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 00:44:22,664 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 00:44:22,664 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-11-07 00:44:22,665 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-11-07 00:44:22,665 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-11-07 00:44:22,666 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-11-07 00:44:22,666 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-11-07 00:44:22,667 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-11-07 00:44:22,668 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification3_spec__1 [2019-11-07 00:44:22,669 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification3_spec__2 [2019-11-07 00:44:22,669 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-11-07 00:44:22,669 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-11-07 00:44:22,670 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-11-07 00:44:22,671 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-11-07 00:44:22,671 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-11-07 00:44:22,672 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-11-07 00:44:22,674 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-11-07 00:44:22,675 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-11-07 00:44:22,675 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-11-07 00:44:22,675 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-11-07 00:44:22,676 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-11-07 00:44:22,676 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-11-07 00:44:22,676 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-11-07 00:44:22,676 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-11-07 00:44:22,677 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-11-07 00:44:22,677 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-11-07 00:44:22,677 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-11-07 00:44:22,678 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-11-07 00:44:22,678 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-11-07 00:44:22,678 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-11-07 00:44:22,678 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-11-07 00:44:22,679 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-11-07 00:44:22,679 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-11-07 00:44:22,679 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-11-07 00:44:22,679 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-11-07 00:44:22,680 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-11-07 00:44:22,680 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__weight [2019-11-07 00:44:22,681 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-11-07 00:44:22,681 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-11-07 00:44:22,681 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-11-07 00:44:22,681 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-11-07 00:44:22,682 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-11-07 00:44:22,682 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-11-07 00:44:22,682 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-11-07 00:44:22,682 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-11-07 00:44:22,682 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-11-07 00:44:22,683 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-11-07 00:44:22,683 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2019-11-07 00:44:22,683 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__twothirdsfull [2019-11-07 00:44:22,683 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-11-07 00:44:22,683 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-11-07 00:44:22,683 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-11-07 00:44:22,684 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-11-07 00:44:22,684 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2019-11-07 00:44:22,684 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-11-07 00:44:22,684 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-11-07 00:44:22,684 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-11-07 00:44:22,685 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-11-07 00:44:22,685 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-11-07 00:44:22,685 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-11-07 00:44:22,686 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2019-11-07 00:44:22,686 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloor [2019-11-07 00:44:22,686 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-11-07 00:44:22,687 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-11-07 00:44:22,687 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-11-07 00:44:22,687 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-11-07 00:44:22,687 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-11-07 00:44:22,687 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-11-07 00:44:22,688 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-11-07 00:44:22,688 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-11-07 00:44:22,688 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-11-07 00:44:22,688 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-11-07 00:44:22,688 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-11-07 00:44:22,689 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-11-07 00:44:22,690 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-11-07 00:44:22,690 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-11-07 00:44:22,690 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-11-07 00:44:22,690 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-11-07 00:44:22,690 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 00:44:22,691 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 00:44:22,691 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 00:44:22,692 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-11-07 00:44:22,692 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-11-07 00:44:22,692 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-11-07 00:44:22,692 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-11-07 00:44:22,693 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-11-07 00:44:22,694 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-11-07 00:44:22,694 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-11-07 00:44:22,694 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-11-07 00:44:22,695 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification3_spec__1 [2019-11-07 00:44:22,695 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification3_spec__2 [2019-11-07 00:44:22,695 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-11-07 00:44:22,695 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-07 00:44:22,695 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-07 00:44:22,696 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-11-07 00:44:22,696 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-07 00:44:22,696 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-07 00:44:22,696 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 00:44:22,696 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-07 00:44:22,696 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-11-07 00:44:22,697 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 00:44:22,697 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-11-07 00:44:22,697 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-11-07 00:44:22,697 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 00:44:22,697 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-11-07 00:44:22,697 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-11-07 00:44:22,698 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 00:44:22,698 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-11-07 00:44:22,698 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-11-07 00:44:22,699 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-11-07 00:44:22,699 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-11-07 00:44:22,699 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-11-07 00:44:22,699 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-11-07 00:44:22,700 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-11-07 00:44:22,700 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-11-07 00:44:22,700 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-11-07 00:44:22,700 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-11-07 00:44:22,701 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-11-07 00:44:22,701 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-11-07 00:44:22,702 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-11-07 00:44:22,702 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-11-07 00:44:22,703 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-11-07 00:44:22,703 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-11-07 00:44:22,703 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-11-07 00:44:22,705 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-11-07 00:44:22,705 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-11-07 00:44:22,705 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-11-07 00:44:22,705 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-11-07 00:44:22,705 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-11-07 00:44:22,706 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-11-07 00:44:22,706 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-11-07 00:44:22,707 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-11-07 00:44:22,707 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-11-07 00:44:22,707 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-11-07 00:44:22,707 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-11-07 00:44:22,708 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-11-07 00:44:22,709 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2019-11-07 00:44:22,713 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloor [2019-11-07 00:44:22,714 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-11-07 00:44:22,714 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-11-07 00:44:22,714 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__weight [2019-11-07 00:44:22,715 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-11-07 00:44:22,715 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-11-07 00:44:22,716 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-11-07 00:44:22,722 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-11-07 00:44:22,722 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2019-11-07 00:44:22,722 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__twothirdsfull [2019-11-07 00:44:22,722 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-11-07 00:44:22,724 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-11-07 00:44:22,724 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-11-07 00:44:22,724 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2019-11-07 00:44:22,725 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-11-07 00:44:22,725 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-11-07 00:44:22,725 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-11-07 00:44:22,725 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-11-07 00:44:22,726 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-07 00:44:22,726 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-11-07 00:44:22,726 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-11-07 00:44:22,726 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-11-07 00:44:22,727 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-11-07 00:44:22,727 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-11-07 00:44:22,727 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-11-07 00:44:22,727 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-11-07 00:44:22,727 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-11-07 00:44:22,728 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-11-07 00:44:22,728 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-11-07 00:44:22,728 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-11-07 00:44:22,728 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-11-07 00:44:22,728 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-11-07 00:44:22,728 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 00:44:22,729 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 00:44:22,729 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-07 00:44:22,729 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 00:44:25,393 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 00:44:25,393 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-11-07 00:44:25,395 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:44:25 BoogieIcfgContainer [2019-11-07 00:44:25,395 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 00:44:25,396 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 00:44:25,396 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 00:44:25,400 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 00:44:25,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:44:21" (1/3) ... [2019-11-07 00:44:25,401 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29d341ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:44:25, skipping insertion in model container [2019-11-07 00:44:25,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:44:22" (2/3) ... [2019-11-07 00:44:25,401 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29d341ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:44:25, skipping insertion in model container [2019-11-07 00:44:25,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:44:25" (3/3) ... [2019-11-07 00:44:25,403 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product31.cil.c [2019-11-07 00:44:25,413 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 00:44:25,424 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 00:44:25,436 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 00:44:25,469 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 00:44:25,469 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 00:44:25,469 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 00:44:25,470 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 00:44:25,470 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 00:44:25,470 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 00:44:25,470 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 00:44:25,470 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 00:44:25,507 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states. [2019-11-07 00:44:25,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-11-07 00:44:25,539 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:44:25,540 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:44:25,543 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:44:25,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:44:25,549 INFO L82 PathProgramCache]: Analyzing trace with hash -734738765, now seen corresponding path program 1 times [2019-11-07 00:44:25,560 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:44:25,560 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492851342] [2019-11-07 00:44:25,560 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:44:25,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:44:26,249 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 00:44:26,250 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492851342] [2019-11-07 00:44:26,251 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:44:26,251 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-07 00:44:26,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254856612] [2019-11-07 00:44:26,260 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 00:44:26,263 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:44:26,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 00:44:26,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:44:26,285 INFO L87 Difference]: Start difference. First operand 837 states. Second operand 7 states. [2019-11-07 00:44:26,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:44:26,624 INFO L93 Difference]: Finished difference Result 1353 states and 2166 transitions. [2019-11-07 00:44:26,624 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:44:26,626 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 141 [2019-11-07 00:44:26,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:44:26,666 INFO L225 Difference]: With dead ends: 1353 [2019-11-07 00:44:26,667 INFO L226 Difference]: Without dead ends: 685 [2019-11-07 00:44:26,679 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 00:44:26,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2019-11-07 00:44:26,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 683. [2019-11-07 00:44:26,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 683 states. [2019-11-07 00:44:26,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 1078 transitions. [2019-11-07 00:44:26,859 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 1078 transitions. Word has length 141 [2019-11-07 00:44:26,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:44:26,860 INFO L462 AbstractCegarLoop]: Abstraction has 683 states and 1078 transitions. [2019-11-07 00:44:26,860 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 00:44:26,860 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 1078 transitions. [2019-11-07 00:44:26,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-11-07 00:44:26,867 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:44:26,868 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:44:26,868 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:44:26,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:44:26,869 INFO L82 PathProgramCache]: Analyzing trace with hash -843585886, now seen corresponding path program 1 times [2019-11-07 00:44:26,869 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:44:26,869 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444758583] [2019-11-07 00:44:26,869 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:44:26,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:44:27,194 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 00:44:27,194 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444758583] [2019-11-07 00:44:27,194 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:44:27,195 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 00:44:27,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82209401] [2019-11-07 00:44:27,197 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:44:27,197 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:44:27,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:44:27,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 00:44:27,198 INFO L87 Difference]: Start difference. First operand 683 states and 1078 transitions. Second operand 4 states. [2019-11-07 00:44:27,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:44:27,270 INFO L93 Difference]: Finished difference Result 1332 states and 2121 transitions. [2019-11-07 00:44:27,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 00:44:27,271 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 142 [2019-11-07 00:44:27,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:44:27,277 INFO L225 Difference]: With dead ends: 1332 [2019-11-07 00:44:27,277 INFO L226 Difference]: Without dead ends: 665 [2019-11-07 00:44:27,281 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 00:44:27,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2019-11-07 00:44:27,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 665. [2019-11-07 00:44:27,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 665 states. [2019-11-07 00:44:27,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 1045 transitions. [2019-11-07 00:44:27,315 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 1045 transitions. Word has length 142 [2019-11-07 00:44:27,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:44:27,316 INFO L462 AbstractCegarLoop]: Abstraction has 665 states and 1045 transitions. [2019-11-07 00:44:27,316 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:44:27,316 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 1045 transitions. [2019-11-07 00:44:27,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-11-07 00:44:27,320 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:44:27,321 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:44:27,321 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:44:27,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:44:27,321 INFO L82 PathProgramCache]: Analyzing trace with hash -71062830, now seen corresponding path program 1 times [2019-11-07 00:44:27,322 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:44:27,322 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532907727] [2019-11-07 00:44:27,322 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:44:27,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:44:27,510 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 00:44:27,511 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532907727] [2019-11-07 00:44:27,511 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:44:27,511 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-07 00:44:27,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666856285] [2019-11-07 00:44:27,512 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 00:44:27,512 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:44:27,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 00:44:27,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:44:27,513 INFO L87 Difference]: Start difference. First operand 665 states and 1045 transitions. Second operand 7 states. [2019-11-07 00:44:27,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:44:27,641 INFO L93 Difference]: Finished difference Result 1301 states and 2063 transitions. [2019-11-07 00:44:27,642 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:44:27,642 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 142 [2019-11-07 00:44:27,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:44:27,648 INFO L225 Difference]: With dead ends: 1301 [2019-11-07 00:44:27,648 INFO L226 Difference]: Without dead ends: 659 [2019-11-07 00:44:27,653 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 00:44:27,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2019-11-07 00:44:27,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 659. [2019-11-07 00:44:27,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 659 states. [2019-11-07 00:44:27,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 1032 transitions. [2019-11-07 00:44:27,685 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 1032 transitions. Word has length 142 [2019-11-07 00:44:27,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:44:27,686 INFO L462 AbstractCegarLoop]: Abstraction has 659 states and 1032 transitions. [2019-11-07 00:44:27,686 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 00:44:27,686 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 1032 transitions. [2019-11-07 00:44:27,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2019-11-07 00:44:27,690 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:44:27,690 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:44:27,691 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:44:27,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:44:27,691 INFO L82 PathProgramCache]: Analyzing trace with hash 406921655, now seen corresponding path program 1 times [2019-11-07 00:44:27,691 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:44:27,692 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387615362] [2019-11-07 00:44:27,692 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:44:27,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:44:27,877 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 00:44:27,878 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387615362] [2019-11-07 00:44:27,878 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:44:27,878 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-07 00:44:27,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583008015] [2019-11-07 00:44:27,880 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 00:44:27,880 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:44:27,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 00:44:27,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:44:27,883 INFO L87 Difference]: Start difference. First operand 659 states and 1032 transitions. Second operand 7 states. [2019-11-07 00:44:28,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:44:28,049 INFO L93 Difference]: Finished difference Result 1289 states and 2037 transitions. [2019-11-07 00:44:28,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:44:28,049 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 143 [2019-11-07 00:44:28,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:44:28,058 INFO L225 Difference]: With dead ends: 1289 [2019-11-07 00:44:28,059 INFO L226 Difference]: Without dead ends: 653 [2019-11-07 00:44:28,063 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 00:44:28,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2019-11-07 00:44:28,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 653. [2019-11-07 00:44:28,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 653 states. [2019-11-07 00:44:28,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 1019 transitions. [2019-11-07 00:44:28,096 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 1019 transitions. Word has length 143 [2019-11-07 00:44:28,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:44:28,096 INFO L462 AbstractCegarLoop]: Abstraction has 653 states and 1019 transitions. [2019-11-07 00:44:28,096 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 00:44:28,096 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 1019 transitions. [2019-11-07 00:44:28,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-11-07 00:44:28,102 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:44:28,102 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:44:28,102 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:44:28,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:44:28,103 INFO L82 PathProgramCache]: Analyzing trace with hash -576561514, now seen corresponding path program 1 times [2019-11-07 00:44:28,103 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:44:28,103 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834348677] [2019-11-07 00:44:28,104 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:44:28,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:44:28,285 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 00:44:28,287 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834348677] [2019-11-07 00:44:28,287 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:44:28,287 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-07 00:44:28,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128806705] [2019-11-07 00:44:28,288 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 00:44:28,288 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:44:28,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 00:44:28,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:44:28,290 INFO L87 Difference]: Start difference. First operand 653 states and 1019 transitions. Second operand 7 states. [2019-11-07 00:44:28,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:44:28,420 INFO L93 Difference]: Finished difference Result 1277 states and 2011 transitions. [2019-11-07 00:44:28,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:44:28,421 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 144 [2019-11-07 00:44:28,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:44:28,441 INFO L225 Difference]: With dead ends: 1277 [2019-11-07 00:44:28,441 INFO L226 Difference]: Without dead ends: 647 [2019-11-07 00:44:28,446 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 00:44:28,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2019-11-07 00:44:28,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 647. [2019-11-07 00:44:28,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 647 states. [2019-11-07 00:44:28,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 1006 transitions. [2019-11-07 00:44:28,479 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 1006 transitions. Word has length 144 [2019-11-07 00:44:28,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:44:28,480 INFO L462 AbstractCegarLoop]: Abstraction has 647 states and 1006 transitions. [2019-11-07 00:44:28,480 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 00:44:28,480 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 1006 transitions. [2019-11-07 00:44:28,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-11-07 00:44:28,486 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:44:28,488 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:44:28,488 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:44:28,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:44:28,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1815508329, now seen corresponding path program 1 times [2019-11-07 00:44:28,489 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:44:28,490 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948830993] [2019-11-07 00:44:28,490 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:44:28,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:44:28,672 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 00:44:28,672 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948830993] [2019-11-07 00:44:28,673 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:44:28,674 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-07 00:44:28,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329331300] [2019-11-07 00:44:28,674 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 00:44:28,675 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:44:28,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 00:44:28,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:44:28,677 INFO L87 Difference]: Start difference. First operand 647 states and 1006 transitions. Second operand 7 states. [2019-11-07 00:44:28,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:44:28,778 INFO L93 Difference]: Finished difference Result 1265 states and 1985 transitions. [2019-11-07 00:44:28,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:44:28,779 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 144 [2019-11-07 00:44:28,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:44:28,787 INFO L225 Difference]: With dead ends: 1265 [2019-11-07 00:44:28,787 INFO L226 Difference]: Without dead ends: 647 [2019-11-07 00:44:28,791 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 00:44:28,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2019-11-07 00:44:28,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 647. [2019-11-07 00:44:28,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 647 states. [2019-11-07 00:44:28,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 1005 transitions. [2019-11-07 00:44:28,887 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 1005 transitions. Word has length 144 [2019-11-07 00:44:28,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:44:28,887 INFO L462 AbstractCegarLoop]: Abstraction has 647 states and 1005 transitions. [2019-11-07 00:44:28,887 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 00:44:28,888 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 1005 transitions. [2019-11-07 00:44:28,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-11-07 00:44:28,895 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:44:28,895 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:44:28,895 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:44:28,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:44:28,896 INFO L82 PathProgramCache]: Analyzing trace with hash 379098299, now seen corresponding path program 1 times [2019-11-07 00:44:28,896 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:44:28,896 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25631751] [2019-11-07 00:44:28,896 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:44:28,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:44:29,071 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 00:44:29,072 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25631751] [2019-11-07 00:44:29,072 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:44:29,072 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-07 00:44:29,073 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130731140] [2019-11-07 00:44:29,073 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 00:44:29,073 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:44:29,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 00:44:29,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-07 00:44:29,074 INFO L87 Difference]: Start difference. First operand 647 states and 1005 transitions. Second operand 5 states. [2019-11-07 00:44:29,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:44:29,172 INFO L93 Difference]: Finished difference Result 1264 states and 1982 transitions. [2019-11-07 00:44:29,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:44:29,173 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 145 [2019-11-07 00:44:29,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:44:29,178 INFO L225 Difference]: With dead ends: 1264 [2019-11-07 00:44:29,178 INFO L226 Difference]: Without dead ends: 647 [2019-11-07 00:44:29,182 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-07 00:44:29,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2019-11-07 00:44:29,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 647. [2019-11-07 00:44:29,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 647 states. [2019-11-07 00:44:29,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 1004 transitions. [2019-11-07 00:44:29,210 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 1004 transitions. Word has length 145 [2019-11-07 00:44:29,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:44:29,210 INFO L462 AbstractCegarLoop]: Abstraction has 647 states and 1004 transitions. [2019-11-07 00:44:29,211 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 00:44:29,211 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 1004 transitions. [2019-11-07 00:44:29,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-11-07 00:44:29,214 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:44:29,214 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:44:29,215 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:44:29,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:44:29,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1077265188, now seen corresponding path program 1 times [2019-11-07 00:44:29,215 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:44:29,216 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815500095] [2019-11-07 00:44:29,216 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:44:29,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:44:29,361 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 00:44:29,362 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815500095] [2019-11-07 00:44:29,362 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:44:29,363 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-07 00:44:29,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042780217] [2019-11-07 00:44:29,364 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 00:44:29,364 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:44:29,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 00:44:29,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-07 00:44:29,365 INFO L87 Difference]: Start difference. First operand 647 states and 1004 transitions. Second operand 5 states. [2019-11-07 00:44:29,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:44:29,466 INFO L93 Difference]: Finished difference Result 1264 states and 1980 transitions. [2019-11-07 00:44:29,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:44:29,467 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 146 [2019-11-07 00:44:29,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:44:29,474 INFO L225 Difference]: With dead ends: 1264 [2019-11-07 00:44:29,474 INFO L226 Difference]: Without dead ends: 647 [2019-11-07 00:44:29,478 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-07 00:44:29,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2019-11-07 00:44:29,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 647. [2019-11-07 00:44:29,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 647 states. [2019-11-07 00:44:29,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 1003 transitions. [2019-11-07 00:44:29,508 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 1003 transitions. Word has length 146 [2019-11-07 00:44:29,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:44:29,508 INFO L462 AbstractCegarLoop]: Abstraction has 647 states and 1003 transitions. [2019-11-07 00:44:29,508 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 00:44:29,509 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 1003 transitions. [2019-11-07 00:44:29,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-11-07 00:44:29,512 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:44:29,513 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:44:29,513 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:44:29,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:44:29,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1621721034, now seen corresponding path program 1 times [2019-11-07 00:44:29,514 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:44:29,514 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950182741] [2019-11-07 00:44:29,514 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:44:29,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:44:29,662 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 00:44:29,663 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950182741] [2019-11-07 00:44:29,663 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:44:29,664 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-07 00:44:29,664 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829318970] [2019-11-07 00:44:29,725 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 00:44:29,725 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:44:29,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 00:44:29,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-07 00:44:29,728 INFO L87 Difference]: Start difference. First operand 647 states and 1003 transitions. Second operand 5 states. [2019-11-07 00:44:29,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:44:29,808 INFO L93 Difference]: Finished difference Result 1264 states and 1978 transitions. [2019-11-07 00:44:29,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:44:29,809 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 147 [2019-11-07 00:44:29,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:44:29,815 INFO L225 Difference]: With dead ends: 1264 [2019-11-07 00:44:29,816 INFO L226 Difference]: Without dead ends: 647 [2019-11-07 00:44:29,820 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-07 00:44:29,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2019-11-07 00:44:29,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 647. [2019-11-07 00:44:29,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 647 states. [2019-11-07 00:44:29,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 1002 transitions. [2019-11-07 00:44:29,846 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 1002 transitions. Word has length 147 [2019-11-07 00:44:29,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:44:29,847 INFO L462 AbstractCegarLoop]: Abstraction has 647 states and 1002 transitions. [2019-11-07 00:44:29,847 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 00:44:29,847 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 1002 transitions. [2019-11-07 00:44:29,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2019-11-07 00:44:29,851 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:44:29,851 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:44:29,851 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:44:29,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:44:29,852 INFO L82 PathProgramCache]: Analyzing trace with hash 333156215, now seen corresponding path program 1 times [2019-11-07 00:44:29,852 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:44:29,852 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134220056] [2019-11-07 00:44:29,853 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:44:29,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:44:30,021 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 00:44:30,022 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134220056] [2019-11-07 00:44:30,022 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:44:30,022 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-07 00:44:30,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768596757] [2019-11-07 00:44:30,023 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 00:44:30,023 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:44:30,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 00:44:30,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-07 00:44:30,024 INFO L87 Difference]: Start difference. First operand 647 states and 1002 transitions. Second operand 5 states. [2019-11-07 00:44:30,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:44:30,133 INFO L93 Difference]: Finished difference Result 1264 states and 1976 transitions. [2019-11-07 00:44:30,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:44:30,134 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 148 [2019-11-07 00:44:30,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:44:30,142 INFO L225 Difference]: With dead ends: 1264 [2019-11-07 00:44:30,143 INFO L226 Difference]: Without dead ends: 647 [2019-11-07 00:44:30,149 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-07 00:44:30,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2019-11-07 00:44:30,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 647. [2019-11-07 00:44:30,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 647 states. [2019-11-07 00:44:30,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 1001 transitions. [2019-11-07 00:44:30,189 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 1001 transitions. Word has length 148 [2019-11-07 00:44:30,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:44:30,189 INFO L462 AbstractCegarLoop]: Abstraction has 647 states and 1001 transitions. [2019-11-07 00:44:30,190 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 00:44:30,190 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 1001 transitions. [2019-11-07 00:44:30,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-11-07 00:44:30,196 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:44:30,196 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:44:30,197 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:44:30,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:44:30,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1837019215, now seen corresponding path program 1 times [2019-11-07 00:44:30,198 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:44:30,198 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939902007] [2019-11-07 00:44:30,199 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:44:30,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:44:30,523 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-07 00:44:30,524 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939902007] [2019-11-07 00:44:30,524 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131831919] [2019-11-07 00:44:30,524 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 00:44:31,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:44:31,487 INFO L256 TraceCheckSpWp]: Trace formula consists of 3067 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-07 00:44:31,515 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:44:31,594 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-07 00:44:31,594 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:44:31,761 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 00:44:31,761 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:44:31,762 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [11] total 12 [2019-11-07 00:44:31,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812958758] [2019-11-07 00:44:31,763 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 00:44:31,763 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:44:31,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 00:44:31,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-11-07 00:44:31,764 INFO L87 Difference]: Start difference. First operand 647 states and 1001 transitions. Second operand 3 states. [2019-11-07 00:44:31,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:44:31,859 INFO L93 Difference]: Finished difference Result 1820 states and 2863 transitions. [2019-11-07 00:44:31,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 00:44:31,859 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 149 [2019-11-07 00:44:31,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:44:31,869 INFO L225 Difference]: With dead ends: 1820 [2019-11-07 00:44:31,870 INFO L226 Difference]: Without dead ends: 1207 [2019-11-07 00:44:31,875 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 300 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-11-07 00:44:31,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1207 states. [2019-11-07 00:44:31,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1207 to 1194. [2019-11-07 00:44:31,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1194 states. [2019-11-07 00:44:31,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1194 states to 1194 states and 1865 transitions. [2019-11-07 00:44:31,931 INFO L78 Accepts]: Start accepts. Automaton has 1194 states and 1865 transitions. Word has length 149 [2019-11-07 00:44:31,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:44:31,932 INFO L462 AbstractCegarLoop]: Abstraction has 1194 states and 1865 transitions. [2019-11-07 00:44:31,932 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 00:44:31,932 INFO L276 IsEmpty]: Start isEmpty. Operand 1194 states and 1865 transitions. [2019-11-07 00:44:31,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-11-07 00:44:31,938 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:44:31,939 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:44:32,146 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:44:32,146 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:44:32,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:44:32,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1672242044, now seen corresponding path program 1 times [2019-11-07 00:44:32,147 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:44:32,148 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387264687] [2019-11-07 00:44:32,148 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:44:32,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:44:32,341 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 00:44:32,342 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387264687] [2019-11-07 00:44:32,342 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:44:32,342 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-07 00:44:32,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442239826] [2019-11-07 00:44:32,343 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 00:44:32,343 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:44:32,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 00:44:32,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:44:32,344 INFO L87 Difference]: Start difference. First operand 1194 states and 1865 transitions. Second operand 7 states. [2019-11-07 00:44:36,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:44:36,614 INFO L93 Difference]: Finished difference Result 3508 states and 5628 transitions. [2019-11-07 00:44:36,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-07 00:44:36,615 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 153 [2019-11-07 00:44:36,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:44:36,634 INFO L225 Difference]: With dead ends: 3508 [2019-11-07 00:44:36,634 INFO L226 Difference]: Without dead ends: 2348 [2019-11-07 00:44:36,643 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2019-11-07 00:44:36,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2348 states. [2019-11-07 00:44:36,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2348 to 2282. [2019-11-07 00:44:36,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2282 states. [2019-11-07 00:44:36,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2282 states to 2282 states and 3635 transitions. [2019-11-07 00:44:36,766 INFO L78 Accepts]: Start accepts. Automaton has 2282 states and 3635 transitions. Word has length 153 [2019-11-07 00:44:36,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:44:36,766 INFO L462 AbstractCegarLoop]: Abstraction has 2282 states and 3635 transitions. [2019-11-07 00:44:36,766 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 00:44:36,767 INFO L276 IsEmpty]: Start isEmpty. Operand 2282 states and 3635 transitions. [2019-11-07 00:44:36,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-11-07 00:44:36,777 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:44:36,777 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:44:36,777 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:44:36,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:44:36,778 INFO L82 PathProgramCache]: Analyzing trace with hash 357872937, now seen corresponding path program 1 times [2019-11-07 00:44:36,778 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:44:36,778 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650343165] [2019-11-07 00:44:36,778 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:44:36,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:44:37,044 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-07 00:44:37,044 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650343165] [2019-11-07 00:44:37,045 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240189926] [2019-11-07 00:44:37,045 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 00:44:37,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:44:37,803 INFO L256 TraceCheckSpWp]: Trace formula consists of 3068 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-07 00:44:37,816 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:44:37,883 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-07 00:44:37,883 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:44:38,216 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 00:44:38,218 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:44:38,218 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [11] total 12 [2019-11-07 00:44:38,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482054690] [2019-11-07 00:44:38,219 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 00:44:38,220 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:44:38,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 00:44:38,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-11-07 00:44:38,220 INFO L87 Difference]: Start difference. First operand 2282 states and 3635 transitions. Second operand 3 states. [2019-11-07 00:44:38,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:44:38,384 INFO L93 Difference]: Finished difference Result 5632 states and 9054 transitions. [2019-11-07 00:44:38,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 00:44:38,384 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 150 [2019-11-07 00:44:38,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:44:38,416 INFO L225 Difference]: With dead ends: 5632 [2019-11-07 00:44:38,417 INFO L226 Difference]: Without dead ends: 3384 [2019-11-07 00:44:38,431 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 302 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-11-07 00:44:38,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3384 states. [2019-11-07 00:44:38,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3384 to 3284. [2019-11-07 00:44:38,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3284 states. [2019-11-07 00:44:38,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3284 states to 3284 states and 5247 transitions. [2019-11-07 00:44:38,637 INFO L78 Accepts]: Start accepts. Automaton has 3284 states and 5247 transitions. Word has length 150 [2019-11-07 00:44:38,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:44:38,638 INFO L462 AbstractCegarLoop]: Abstraction has 3284 states and 5247 transitions. [2019-11-07 00:44:38,638 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 00:44:38,638 INFO L276 IsEmpty]: Start isEmpty. Operand 3284 states and 5247 transitions. [2019-11-07 00:44:38,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-11-07 00:44:38,650 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:44:38,650 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:44:38,868 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:44:38,868 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:44:38,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:44:38,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1845400304, now seen corresponding path program 1 times [2019-11-07 00:44:38,869 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:44:38,869 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045762286] [2019-11-07 00:44:38,870 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:44:38,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:44:39,093 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-07 00:44:39,094 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045762286] [2019-11-07 00:44:39,094 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751450787] [2019-11-07 00:44:39,094 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 00:44:39,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:44:39,753 INFO L256 TraceCheckSpWp]: Trace formula consists of 3086 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:44:39,762 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:44:39,786 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-07 00:44:39,786 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:44:39,977 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 00:44:39,977 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:44:39,977 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [11] total 11 [2019-11-07 00:44:39,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478869893] [2019-11-07 00:44:39,981 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 00:44:39,982 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:44:39,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 00:44:39,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2019-11-07 00:44:39,982 INFO L87 Difference]: Start difference. First operand 3284 states and 5247 transitions. Second operand 3 states. [2019-11-07 00:44:40,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:44:40,263 INFO L93 Difference]: Finished difference Result 9752 states and 15759 transitions. [2019-11-07 00:44:40,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 00:44:40,263 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 153 [2019-11-07 00:44:40,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:44:40,324 INFO L225 Difference]: With dead ends: 9752 [2019-11-07 00:44:40,325 INFO L226 Difference]: Without dead ends: 6503 [2019-11-07 00:44:40,346 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2019-11-07 00:44:40,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6503 states. [2019-11-07 00:44:40,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6503 to 6433. [2019-11-07 00:44:40,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6433 states. [2019-11-07 00:44:40,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6433 states to 6433 states and 10358 transitions. [2019-11-07 00:44:40,674 INFO L78 Accepts]: Start accepts. Automaton has 6433 states and 10358 transitions. Word has length 153 [2019-11-07 00:44:40,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:44:40,675 INFO L462 AbstractCegarLoop]: Abstraction has 6433 states and 10358 transitions. [2019-11-07 00:44:40,675 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 00:44:40,676 INFO L276 IsEmpty]: Start isEmpty. Operand 6433 states and 10358 transitions. [2019-11-07 00:44:40,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-11-07 00:44:40,688 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:44:40,688 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:44:40,897 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:44:40,897 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:44:40,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:44:40,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1169703314, now seen corresponding path program 1 times [2019-11-07 00:44:40,898 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:44:40,899 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119951034] [2019-11-07 00:44:40,899 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:44:40,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:44:41,151 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-07 00:44:41,152 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119951034] [2019-11-07 00:44:41,152 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391620102] [2019-11-07 00:44:41,153 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 00:44:41,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:44:41,822 INFO L256 TraceCheckSpWp]: Trace formula consists of 3085 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-07 00:44:41,830 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:44:41,995 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-07 00:44:41,995 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:44:42,332 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 00:44:42,496 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-07 00:44:42,497 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:44:42,497 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11, 7] total 20 [2019-11-07 00:44:42,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720639987] [2019-11-07 00:44:42,499 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 00:44:42,499 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:44:42,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 00:44:42,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2019-11-07 00:44:42,500 INFO L87 Difference]: Start difference. First operand 6433 states and 10358 transitions. Second operand 6 states. [2019-11-07 00:44:44,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:44:44,568 INFO L93 Difference]: Finished difference Result 17372 states and 28310 transitions. [2019-11-07 00:44:44,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 00:44:44,568 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 153 [2019-11-07 00:44:44,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:44:44,677 INFO L225 Difference]: With dead ends: 17372 [2019-11-07 00:44:44,677 INFO L226 Difference]: Without dead ends: 10973 [2019-11-07 00:44:44,723 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 298 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2019-11-07 00:44:44,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10973 states. [2019-11-07 00:44:45,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10973 to 10927. [2019-11-07 00:44:45,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10927 states. [2019-11-07 00:44:45,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10927 states to 10927 states and 17270 transitions. [2019-11-07 00:44:45,815 INFO L78 Accepts]: Start accepts. Automaton has 10927 states and 17270 transitions. Word has length 153 [2019-11-07 00:44:45,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:44:45,817 INFO L462 AbstractCegarLoop]: Abstraction has 10927 states and 17270 transitions. [2019-11-07 00:44:45,817 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 00:44:45,817 INFO L276 IsEmpty]: Start isEmpty. Operand 10927 states and 17270 transitions. [2019-11-07 00:44:45,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-11-07 00:44:45,822 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:44:45,822 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:44:46,037 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:44:46,038 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:44:46,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:44:46,038 INFO L82 PathProgramCache]: Analyzing trace with hash 672411, now seen corresponding path program 1 times [2019-11-07 00:44:46,038 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:44:46,039 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855496431] [2019-11-07 00:44:46,042 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:44:46,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:44:46,223 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 00:44:46,223 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855496431] [2019-11-07 00:44:46,224 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:44:46,224 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 00:44:46,224 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045745259] [2019-11-07 00:44:46,225 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:44:46,225 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:44:46,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:44:46,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 00:44:46,226 INFO L87 Difference]: Start difference. First operand 10927 states and 17270 transitions. Second operand 4 states. [2019-11-07 00:44:46,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:44:46,626 INFO L93 Difference]: Finished difference Result 21816 states and 34789 transitions. [2019-11-07 00:44:46,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:44:46,627 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 153 [2019-11-07 00:44:46,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:44:46,713 INFO L225 Difference]: With dead ends: 21816 [2019-11-07 00:44:46,713 INFO L226 Difference]: Without dead ends: 10923 [2019-11-07 00:44:46,752 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 00:44:46,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10923 states. [2019-11-07 00:44:47,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10923 to 10891. [2019-11-07 00:44:47,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10891 states. [2019-11-07 00:44:47,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10891 states to 10891 states and 17148 transitions. [2019-11-07 00:44:47,207 INFO L78 Accepts]: Start accepts. Automaton has 10891 states and 17148 transitions. Word has length 153 [2019-11-07 00:44:47,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:44:47,207 INFO L462 AbstractCegarLoop]: Abstraction has 10891 states and 17148 transitions. [2019-11-07 00:44:47,207 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:44:47,208 INFO L276 IsEmpty]: Start isEmpty. Operand 10891 states and 17148 transitions. [2019-11-07 00:44:47,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-11-07 00:44:47,214 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:44:47,214 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:44:47,215 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:44:47,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:44:47,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1409498317, now seen corresponding path program 1 times [2019-11-07 00:44:47,215 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:44:47,215 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108737223] [2019-11-07 00:44:47,216 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:44:47,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:44:47,566 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-11-07 00:44:47,566 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108737223] [2019-11-07 00:44:47,567 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:44:47,567 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-07 00:44:47,567 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157630723] [2019-11-07 00:44:47,568 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 00:44:47,570 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:44:47,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 00:44:47,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:44:47,571 INFO L87 Difference]: Start difference. First operand 10891 states and 17148 transitions. Second operand 7 states.