/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_spec13_product22.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 00:38:13,745 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 00:38:13,747 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 00:38:13,759 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 00:38:13,760 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 00:38:13,761 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 00:38:13,762 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 00:38:13,764 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 00:38:13,765 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 00:38:13,766 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 00:38:13,767 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 00:38:13,768 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 00:38:13,769 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 00:38:13,770 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 00:38:13,771 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 00:38:13,772 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 00:38:13,772 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 00:38:13,773 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 00:38:13,775 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 00:38:13,777 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 00:38:13,779 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 00:38:13,780 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 00:38:13,781 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 00:38:13,782 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 00:38:13,786 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-07 00:38:13,786 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-07 00:38:13,786 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-07 00:38:13,787 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-07 00:38:13,790 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-07 00:38:13,791 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-07 00:38:13,791 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-07 00:38:13,792 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-07 00:38:13,792 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-07 00:38:13,795 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-07 00:38:13,796 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-07 00:38:13,797 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-07 00:38:13,797 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-07 00:38:13,798 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-07 00:38:13,800 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 00:38:13,802 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 00:38:13,802 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 00:38:13,807 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 00:38:13,832 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 00:38:13,832 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 00:38:13,834 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 00:38:13,835 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 00:38:13,835 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 00:38:13,835 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 00:38:13,835 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 00:38:13,836 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 00:38:13,836 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 00:38:13,836 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 00:38:13,837 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 00:38:13,837 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 00:38:13,838 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 00:38:13,838 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 00:38:13,838 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 00:38:13,838 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 00:38:13,839 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 00:38:13,839 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 00:38:13,839 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 00:38:13,839 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 00:38:13,840 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 00:38:13,840 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 00:38:13,840 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 00:38:13,840 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 00:38:13,841 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 00:38:13,841 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 00:38:13,841 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 00:38:13,841 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 00:38:13,841 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 00:38:14,104 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 00:38:14,117 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 00:38:14,120 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 00:38:14,122 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 00:38:14,122 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 00:38:14,123 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec13_product22.cil.c [2019-11-07 00:38:14,184 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c67bef2f/16e3aef1a66747619dca0603ac47682a/FLAG21337f23b [2019-11-07 00:38:14,788 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 00:38:14,794 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec13_product22.cil.c [2019-11-07 00:38:14,821 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c67bef2f/16e3aef1a66747619dca0603ac47682a/FLAG21337f23b [2019-11-07 00:38:15,020 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c67bef2f/16e3aef1a66747619dca0603ac47682a [2019-11-07 00:38:15,029 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 00:38:15,030 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 00:38:15,031 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 00:38:15,032 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 00:38:15,035 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 00:38:15,036 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:38:15" (1/1) ... [2019-11-07 00:38:15,039 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@115225be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:38:15, skipping insertion in model container [2019-11-07 00:38:15,039 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:38:15" (1/1) ... [2019-11-07 00:38:15,047 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 00:38:15,130 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 00:38:15,775 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 00:38:15,798 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 00:38:15,951 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 00:38:16,014 INFO L192 MainTranslator]: Completed translation [2019-11-07 00:38:16,015 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:38:16 WrapperNode [2019-11-07 00:38:16,015 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 00:38:16,016 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 00:38:16,016 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 00:38:16,016 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 00:38:16,029 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:38:16" (1/1) ... [2019-11-07 00:38:16,029 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:38:16" (1/1) ... [2019-11-07 00:38:16,067 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:38:16" (1/1) ... [2019-11-07 00:38:16,068 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:38:16" (1/1) ... [2019-11-07 00:38:16,151 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:38:16" (1/1) ... [2019-11-07 00:38:16,196 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:38:16" (1/1) ... [2019-11-07 00:38:16,221 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:38:16" (1/1) ... [2019-11-07 00:38:16,236 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 00:38:16,237 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 00:38:16,237 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 00:38:16,237 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 00:38:16,238 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:38:16" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 00:38:16,310 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 00:38:16,310 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 00:38:16,311 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-11-07 00:38:16,311 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-11-07 00:38:16,311 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-11-07 00:38:16,311 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-11-07 00:38:16,312 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-11-07 00:38:16,312 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-11-07 00:38:16,312 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-11-07 00:38:16,312 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-11-07 00:38:16,313 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-11-07 00:38:16,313 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-11-07 00:38:16,313 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-11-07 00:38:16,313 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-11-07 00:38:16,314 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-11-07 00:38:16,314 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-11-07 00:38:16,314 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-11-07 00:38:16,314 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-11-07 00:38:16,315 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-11-07 00:38:16,315 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-11-07 00:38:16,315 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-11-07 00:38:16,315 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-11-07 00:38:16,316 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-11-07 00:38:16,316 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-11-07 00:38:16,316 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-11-07 00:38:16,316 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-11-07 00:38:16,317 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-11-07 00:38:16,317 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2019-11-07 00:38:16,317 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-11-07 00:38:16,318 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-11-07 00:38:16,318 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-11-07 00:38:16,318 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__weight [2019-11-07 00:38:16,318 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-11-07 00:38:16,319 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-11-07 00:38:16,319 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-11-07 00:38:16,319 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__twothirdsfull [2019-11-07 00:38:16,319 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-11-07 00:38:16,320 INFO L138 BoogieDeclarations]: Found implementation of procedure printState__wrappee__twothirdsfull [2019-11-07 00:38:16,320 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-11-07 00:38:16,320 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-11-07 00:38:16,320 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-11-07 00:38:16,321 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-11-07 00:38:16,321 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-11-07 00:38:16,321 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-11-07 00:38:16,321 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-11-07 00:38:16,321 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-11-07 00:38:16,322 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-11-07 00:38:16,322 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-11-07 00:38:16,322 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-11-07 00:38:16,322 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-11-07 00:38:16,322 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-11-07 00:38:16,323 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-11-07 00:38:16,323 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-11-07 00:38:16,323 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-11-07 00:38:16,323 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-11-07 00:38:16,323 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-11-07 00:38:16,323 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-11-07 00:38:16,324 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-11-07 00:38:16,324 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-11-07 00:38:16,324 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-11-07 00:38:16,324 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-11-07 00:38:16,324 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-11-07 00:38:16,325 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-11-07 00:38:16,325 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-11-07 00:38:16,325 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-11-07 00:38:16,325 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-11-07 00:38:16,325 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-11-07 00:38:16,326 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-11-07 00:38:16,326 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-11-07 00:38:16,326 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-11-07 00:38:16,326 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-11-07 00:38:16,326 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-11-07 00:38:16,326 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-11-07 00:38:16,327 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 00:38:16,327 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification13_spec__1 [2019-11-07 00:38:16,327 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification13_spec__2 [2019-11-07 00:38:16,327 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 00:38:16,327 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 00:38:16,328 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-11-07 00:38:16,328 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-11-07 00:38:16,328 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-11-07 00:38:16,328 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-11-07 00:38:16,328 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-11-07 00:38:16,329 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-11-07 00:38:16,329 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-11-07 00:38:16,329 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-11-07 00:38:16,329 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-07 00:38:16,329 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-07 00:38:16,330 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-11-07 00:38:16,330 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-07 00:38:16,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-07 00:38:16,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 00:38:16,330 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-07 00:38:16,330 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-11-07 00:38:16,331 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 00:38:16,331 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-11-07 00:38:16,331 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-11-07 00:38:16,331 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 00:38:16,331 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-11-07 00:38:16,332 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-11-07 00:38:16,332 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 00:38:16,332 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-11-07 00:38:16,332 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-11-07 00:38:16,332 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-11-07 00:38:16,333 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-11-07 00:38:16,333 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-11-07 00:38:16,333 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-11-07 00:38:16,333 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-11-07 00:38:16,333 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-11-07 00:38:16,333 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-11-07 00:38:16,334 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-11-07 00:38:16,334 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-11-07 00:38:16,334 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-11-07 00:38:16,334 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-11-07 00:38:16,334 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-11-07 00:38:16,334 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-11-07 00:38:16,335 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-11-07 00:38:16,335 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-11-07 00:38:16,335 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-11-07 00:38:16,335 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-11-07 00:38:16,335 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-11-07 00:38:16,336 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-11-07 00:38:16,336 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-11-07 00:38:16,336 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-11-07 00:38:16,336 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-11-07 00:38:16,336 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-11-07 00:38:16,336 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-11-07 00:38:16,337 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-11-07 00:38:16,337 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-11-07 00:38:16,337 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-11-07 00:38:16,337 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2019-11-07 00:38:16,337 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-11-07 00:38:16,338 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-11-07 00:38:16,338 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__weight [2019-11-07 00:38:16,338 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-11-07 00:38:16,339 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-11-07 00:38:16,339 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-11-07 00:38:16,339 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__twothirdsfull [2019-11-07 00:38:16,339 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification13_spec__1 [2019-11-07 00:38:16,339 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification13_spec__2 [2019-11-07 00:38:16,339 INFO L130 BoogieDeclarations]: Found specification of procedure printState__wrappee__twothirdsfull [2019-11-07 00:38:16,340 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-11-07 00:38:16,340 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-11-07 00:38:16,340 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-11-07 00:38:16,340 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-11-07 00:38:16,340 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-11-07 00:38:16,341 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-11-07 00:38:16,341 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-11-07 00:38:16,341 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-11-07 00:38:16,341 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-11-07 00:38:16,341 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-11-07 00:38:16,342 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-07 00:38:16,342 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-11-07 00:38:16,342 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-11-07 00:38:16,342 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-11-07 00:38:16,343 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-11-07 00:38:16,343 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-11-07 00:38:16,343 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-11-07 00:38:16,343 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-11-07 00:38:16,343 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-11-07 00:38:16,344 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-11-07 00:38:16,344 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-11-07 00:38:16,344 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-11-07 00:38:16,344 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 00:38:16,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 00:38:16,345 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-07 00:38:16,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 00:38:18,802 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 00:38:18,802 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-11-07 00:38:18,804 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:38:18 BoogieIcfgContainer [2019-11-07 00:38:18,804 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 00:38:18,805 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 00:38:18,805 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 00:38:18,809 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 00:38:18,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:38:15" (1/3) ... [2019-11-07 00:38:18,810 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@363ad117 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:38:18, skipping insertion in model container [2019-11-07 00:38:18,810 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:38:16" (2/3) ... [2019-11-07 00:38:18,811 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@363ad117 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:38:18, skipping insertion in model container [2019-11-07 00:38:18,811 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:38:18" (3/3) ... [2019-11-07 00:38:18,813 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec13_product22.cil.c [2019-11-07 00:38:18,823 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 00:38:18,833 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 00:38:18,844 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 00:38:18,892 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 00:38:18,892 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 00:38:18,893 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 00:38:18,893 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 00:38:18,893 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 00:38:18,893 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 00:38:18,893 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 00:38:18,893 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 00:38:18,938 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states. [2019-11-07 00:38:18,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-11-07 00:38:18,971 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:38:18,973 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:38:18,976 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:38:18,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:38:18,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1312558517, now seen corresponding path program 1 times [2019-11-07 00:38:18,993 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:38:18,993 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694683110] [2019-11-07 00:38:18,993 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:38:19,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:19,745 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-07 00:38:19,746 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694683110] [2019-11-07 00:38:19,747 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117685491] [2019-11-07 00:38:19,747 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 00:38:20,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:20,453 INFO L256 TraceCheckSpWp]: Trace formula consists of 2878 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:38:20,470 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:38:20,546 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-07 00:38:20,548 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:38:20,715 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-07 00:38:20,715 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:38:20,716 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 4] total 10 [2019-11-07 00:38:20,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141079014] [2019-11-07 00:38:20,723 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:38:20,725 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:38:20,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:38:20,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-11-07 00:38:20,743 INFO L87 Difference]: Start difference. First operand 807 states. Second operand 4 states. [2019-11-07 00:38:20,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:38:20,999 INFO L93 Difference]: Finished difference Result 1315 states and 2130 transitions. [2019-11-07 00:38:21,000 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:38:21,001 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 113 [2019-11-07 00:38:21,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:38:21,032 INFO L225 Difference]: With dead ends: 1315 [2019-11-07 00:38:21,032 INFO L226 Difference]: Without dead ends: 663 [2019-11-07 00:38:21,042 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 224 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-11-07 00:38:21,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2019-11-07 00:38:21,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 663. [2019-11-07 00:38:21,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 663 states. [2019-11-07 00:38:21,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 1053 transitions. [2019-11-07 00:38:21,157 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 1053 transitions. Word has length 113 [2019-11-07 00:38:21,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:38:21,158 INFO L462 AbstractCegarLoop]: Abstraction has 663 states and 1053 transitions. [2019-11-07 00:38:21,158 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:38:21,158 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 1053 transitions. [2019-11-07 00:38:21,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-11-07 00:38:21,164 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:38:21,164 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:38:21,372 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:38:21,372 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:38:21,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:38:21,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1562455753, now seen corresponding path program 1 times [2019-11-07 00:38:21,373 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:38:21,373 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564793386] [2019-11-07 00:38:21,373 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:38:21,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:21,697 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-07 00:38:21,698 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564793386] [2019-11-07 00:38:21,698 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246360139] [2019-11-07 00:38:21,698 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 00:38:22,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:22,279 INFO L256 TraceCheckSpWp]: Trace formula consists of 2880 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-07 00:38:22,289 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:38:22,370 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-07 00:38:22,371 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:38:22,667 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-07 00:38:22,668 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:38:22,668 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 16 [2019-11-07 00:38:22,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859398249] [2019-11-07 00:38:22,669 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 00:38:22,670 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:38:22,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 00:38:22,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2019-11-07 00:38:22,670 INFO L87 Difference]: Start difference. First operand 663 states and 1053 transitions. Second operand 7 states. [2019-11-07 00:38:22,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:38:22,840 INFO L93 Difference]: Finished difference Result 1309 states and 2093 transitions. [2019-11-07 00:38:22,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:38:22,841 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 115 [2019-11-07 00:38:22,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:38:22,848 INFO L225 Difference]: With dead ends: 1309 [2019-11-07 00:38:22,849 INFO L226 Difference]: Without dead ends: 674 [2019-11-07 00:38:22,853 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 220 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2019-11-07 00:38:22,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2019-11-07 00:38:22,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 670. [2019-11-07 00:38:22,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 670 states. [2019-11-07 00:38:22,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 1065 transitions. [2019-11-07 00:38:22,906 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 1065 transitions. Word has length 115 [2019-11-07 00:38:22,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:38:22,908 INFO L462 AbstractCegarLoop]: Abstraction has 670 states and 1065 transitions. [2019-11-07 00:38:22,908 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 00:38:22,908 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 1065 transitions. [2019-11-07 00:38:22,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-11-07 00:38:22,917 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:38:22,918 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:38:23,124 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:38:23,125 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:38:23,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:38:23,125 INFO L82 PathProgramCache]: Analyzing trace with hash 543611026, now seen corresponding path program 1 times [2019-11-07 00:38:23,125 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:38:23,126 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758799069] [2019-11-07 00:38:23,126 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:38:23,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:23,247 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-07 00:38:23,247 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758799069] [2019-11-07 00:38:23,248 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451292336] [2019-11-07 00:38:23,248 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 00:38:23,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:23,845 INFO L256 TraceCheckSpWp]: Trace formula consists of 2881 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:38:23,852 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:38:23,896 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-07 00:38:23,896 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:38:24,048 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-07 00:38:24,048 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:38:24,048 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-11-07 00:38:24,049 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602738141] [2019-11-07 00:38:24,052 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:38:24,052 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:38:24,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:38:24,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:38:24,053 INFO L87 Difference]: Start difference. First operand 670 states and 1065 transitions. Second operand 4 states. [2019-11-07 00:38:24,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:38:24,158 INFO L93 Difference]: Finished difference Result 1325 states and 2118 transitions. [2019-11-07 00:38:24,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:38:24,159 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 116 [2019-11-07 00:38:24,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:38:24,167 INFO L225 Difference]: With dead ends: 1325 [2019-11-07 00:38:24,167 INFO L226 Difference]: Without dead ends: 681 [2019-11-07 00:38:24,171 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 228 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:38:24,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2019-11-07 00:38:24,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 679. [2019-11-07 00:38:24,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 679 states. [2019-11-07 00:38:24,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 1073 transitions. [2019-11-07 00:38:24,220 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 1073 transitions. Word has length 116 [2019-11-07 00:38:24,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:38:24,221 INFO L462 AbstractCegarLoop]: Abstraction has 679 states and 1073 transitions. [2019-11-07 00:38:24,221 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:38:24,221 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 1073 transitions. [2019-11-07 00:38:24,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-11-07 00:38:24,224 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:38:24,225 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:38:24,439 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:38:24,440 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:38:24,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:38:24,440 INFO L82 PathProgramCache]: Analyzing trace with hash 246045182, now seen corresponding path program 1 times [2019-11-07 00:38:24,441 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:38:24,441 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709511138] [2019-11-07 00:38:24,442 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:38:24,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:24,597 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-07 00:38:24,597 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709511138] [2019-11-07 00:38:24,597 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419018789] [2019-11-07 00:38:24,597 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 00:38:25,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:25,371 INFO L256 TraceCheckSpWp]: Trace formula consists of 2881 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-07 00:38:25,381 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:38:25,460 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-07 00:38:25,460 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:38:25,684 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-07 00:38:25,685 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:38:25,685 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 16 [2019-11-07 00:38:25,685 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949953617] [2019-11-07 00:38:25,686 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 00:38:25,686 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:38:25,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 00:38:25,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2019-11-07 00:38:25,687 INFO L87 Difference]: Start difference. First operand 679 states and 1073 transitions. Second operand 7 states. [2019-11-07 00:38:25,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:38:25,837 INFO L93 Difference]: Finished difference Result 1326 states and 2109 transitions. [2019-11-07 00:38:25,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:38:25,837 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 116 [2019-11-07 00:38:25,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:38:25,844 INFO L225 Difference]: With dead ends: 1326 [2019-11-07 00:38:25,844 INFO L226 Difference]: Without dead ends: 688 [2019-11-07 00:38:25,848 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 222 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2019-11-07 00:38:25,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2019-11-07 00:38:25,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 679. [2019-11-07 00:38:25,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 679 states. [2019-11-07 00:38:25,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 1073 transitions. [2019-11-07 00:38:25,878 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 1073 transitions. Word has length 116 [2019-11-07 00:38:25,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:38:25,879 INFO L462 AbstractCegarLoop]: Abstraction has 679 states and 1073 transitions. [2019-11-07 00:38:25,879 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 00:38:25,879 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 1073 transitions. [2019-11-07 00:38:25,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-11-07 00:38:25,881 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:38:25,882 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:38:26,089 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:38:26,089 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:38:26,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:38:26,090 INFO L82 PathProgramCache]: Analyzing trace with hash 703956050, now seen corresponding path program 1 times [2019-11-07 00:38:26,090 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:38:26,091 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143221274] [2019-11-07 00:38:26,091 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:38:26,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:26,230 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-07 00:38:26,231 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143221274] [2019-11-07 00:38:26,231 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758803607] [2019-11-07 00:38:26,231 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:38:26,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:26,769 INFO L256 TraceCheckSpWp]: Trace formula consists of 2883 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:38:26,775 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:38:26,795 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-07 00:38:26,796 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:38:26,906 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-07 00:38:26,906 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:38:26,907 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-11-07 00:38:26,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735179503] [2019-11-07 00:38:26,908 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:38:26,908 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:38:26,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:38:26,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:38:26,909 INFO L87 Difference]: Start difference. First operand 679 states and 1073 transitions. Second operand 4 states. [2019-11-07 00:38:27,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:38:27,240 INFO L93 Difference]: Finished difference Result 1359 states and 2179 transitions. [2019-11-07 00:38:27,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:38:27,241 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 119 [2019-11-07 00:38:27,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:38:27,250 INFO L225 Difference]: With dead ends: 1359 [2019-11-07 00:38:27,251 INFO L226 Difference]: Without dead ends: 721 [2019-11-07 00:38:27,257 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 234 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:38:27,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2019-11-07 00:38:27,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 718. [2019-11-07 00:38:27,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 718 states. [2019-11-07 00:38:27,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 1146 transitions. [2019-11-07 00:38:27,301 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 1146 transitions. Word has length 119 [2019-11-07 00:38:27,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:38:27,303 INFO L462 AbstractCegarLoop]: Abstraction has 718 states and 1146 transitions. [2019-11-07 00:38:27,304 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:38:27,304 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 1146 transitions. [2019-11-07 00:38:27,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-11-07 00:38:27,311 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:38:27,312 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:38:27,531 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:38:27,531 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:38:27,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:38:27,531 INFO L82 PathProgramCache]: Analyzing trace with hash 504600262, now seen corresponding path program 1 times [2019-11-07 00:38:27,532 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:38:27,532 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8026032] [2019-11-07 00:38:27,532 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:38:27,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:27,675 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 00:38:27,676 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8026032] [2019-11-07 00:38:27,676 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704425208] [2019-11-07 00:38:27,676 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:38:28,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:28,299 INFO L256 TraceCheckSpWp]: Trace formula consists of 2885 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:38:28,311 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:38:28,345 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-07 00:38:28,345 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:38:28,456 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 00:38:28,456 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:38:28,457 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [4] total 7 [2019-11-07 00:38:28,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984187379] [2019-11-07 00:38:28,458 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 00:38:28,460 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:38:28,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 00:38:28,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:38:28,461 INFO L87 Difference]: Start difference. First operand 718 states and 1146 transitions. Second operand 5 states. [2019-11-07 00:38:28,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:38:28,570 INFO L93 Difference]: Finished difference Result 1383 states and 2225 transitions. [2019-11-07 00:38:28,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:38:28,570 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 121 [2019-11-07 00:38:28,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:38:28,580 INFO L225 Difference]: With dead ends: 1383 [2019-11-07 00:38:28,581 INFO L226 Difference]: Without dead ends: 718 [2019-11-07 00:38:28,587 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 239 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:38:28,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2019-11-07 00:38:28,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 718. [2019-11-07 00:38:28,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 718 states. [2019-11-07 00:38:28,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 1141 transitions. [2019-11-07 00:38:28,621 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 1141 transitions. Word has length 121 [2019-11-07 00:38:28,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:38:28,622 INFO L462 AbstractCegarLoop]: Abstraction has 718 states and 1141 transitions. [2019-11-07 00:38:28,622 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 00:38:28,623 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 1141 transitions. [2019-11-07 00:38:28,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-11-07 00:38:28,627 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:38:28,627 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:38:28,839 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:38:28,839 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:38:28,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:38:28,840 INFO L82 PathProgramCache]: Analyzing trace with hash -2127688715, now seen corresponding path program 1 times [2019-11-07 00:38:28,840 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:38:28,841 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234495178] [2019-11-07 00:38:28,841 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:38:28,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:29,013 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 00:38:29,015 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234495178] [2019-11-07 00:38:29,015 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224751624] [2019-11-07 00:38:29,016 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:38:29,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:29,599 INFO L256 TraceCheckSpWp]: Trace formula consists of 2886 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-07 00:38:29,611 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:38:29,661 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-07 00:38:29,661 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:38:29,856 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-07 00:38:29,857 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:38:29,857 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 13 [2019-11-07 00:38:29,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615531161] [2019-11-07 00:38:29,858 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-07 00:38:29,858 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:38:29,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-07 00:38:29,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2019-11-07 00:38:29,858 INFO L87 Difference]: Start difference. First operand 718 states and 1141 transitions. Second operand 11 states. [2019-11-07 00:38:30,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:38:30,024 INFO L93 Difference]: Finished difference Result 1357 states and 2166 transitions. [2019-11-07 00:38:30,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-07 00:38:30,025 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 122 [2019-11-07 00:38:30,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:38:30,033 INFO L225 Difference]: With dead ends: 1357 [2019-11-07 00:38:30,033 INFO L226 Difference]: Without dead ends: 738 [2019-11-07 00:38:30,037 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 235 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2019-11-07 00:38:30,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 738 states. [2019-11-07 00:38:30,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 738 to 725. [2019-11-07 00:38:30,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 725 states. [2019-11-07 00:38:30,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 725 states to 725 states and 1152 transitions. [2019-11-07 00:38:30,071 INFO L78 Accepts]: Start accepts. Automaton has 725 states and 1152 transitions. Word has length 122 [2019-11-07 00:38:30,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:38:30,072 INFO L462 AbstractCegarLoop]: Abstraction has 725 states and 1152 transitions. [2019-11-07 00:38:30,072 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-07 00:38:30,072 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states and 1152 transitions. [2019-11-07 00:38:30,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-11-07 00:38:30,074 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:38:30,074 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:38:30,281 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:38:30,281 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:38:30,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:38:30,282 INFO L82 PathProgramCache]: Analyzing trace with hash 454016772, now seen corresponding path program 1 times [2019-11-07 00:38:30,282 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:38:30,283 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728577447] [2019-11-07 00:38:30,283 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:38:30,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:30,384 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-07 00:38:30,385 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728577447] [2019-11-07 00:38:30,385 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130843567] [2019-11-07 00:38:30,385 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:38:30,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:30,925 INFO L256 TraceCheckSpWp]: Trace formula consists of 2887 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-07 00:38:30,929 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:38:30,982 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-07 00:38:30,982 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:38:31,272 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-07 00:38:31,273 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:38:31,273 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 10 [2019-11-07 00:38:31,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684060444] [2019-11-07 00:38:31,274 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-07 00:38:31,274 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:38:31,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-07 00:38:31,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-11-07 00:38:31,275 INFO L87 Difference]: Start difference. First operand 725 states and 1152 transitions. Second operand 8 states. [2019-11-07 00:38:31,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:38:31,415 INFO L93 Difference]: Finished difference Result 1355 states and 2162 transitions. [2019-11-07 00:38:31,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:38:31,416 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 123 [2019-11-07 00:38:31,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:38:31,422 INFO L225 Difference]: With dead ends: 1355 [2019-11-07 00:38:31,422 INFO L226 Difference]: Without dead ends: 736 [2019-11-07 00:38:31,426 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 237 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2019-11-07 00:38:31,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2019-11-07 00:38:31,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 729. [2019-11-07 00:38:31,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 729 states. [2019-11-07 00:38:31,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 729 states to 729 states and 1157 transitions. [2019-11-07 00:38:31,451 INFO L78 Accepts]: Start accepts. Automaton has 729 states and 1157 transitions. Word has length 123 [2019-11-07 00:38:31,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:38:31,451 INFO L462 AbstractCegarLoop]: Abstraction has 729 states and 1157 transitions. [2019-11-07 00:38:31,451 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-07 00:38:31,452 INFO L276 IsEmpty]: Start isEmpty. Operand 729 states and 1157 transitions. [2019-11-07 00:38:31,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-11-07 00:38:31,454 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:38:31,454 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:38:31,673 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:38:31,674 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:38:31,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:38:31,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1900302799, now seen corresponding path program 1 times [2019-11-07 00:38:31,675 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:38:31,675 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115382240] [2019-11-07 00:38:31,676 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:38:31,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:31,794 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-07 00:38:31,794 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115382240] [2019-11-07 00:38:31,794 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261645275] [2019-11-07 00:38:31,794 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:38:32,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:32,355 INFO L256 TraceCheckSpWp]: Trace formula consists of 2888 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:38:32,359 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:38:32,382 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-07 00:38:32,382 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:38:32,481 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-07 00:38:32,481 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:38:32,481 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [4] total 7 [2019-11-07 00:38:32,481 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851055953] [2019-11-07 00:38:32,483 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 00:38:32,483 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:38:32,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 00:38:32,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:38:32,484 INFO L87 Difference]: Start difference. First operand 729 states and 1157 transitions. Second operand 5 states. [2019-11-07 00:38:32,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:38:32,668 INFO L93 Difference]: Finished difference Result 1393 states and 2239 transitions. [2019-11-07 00:38:32,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:38:32,669 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 124 [2019-11-07 00:38:32,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:38:32,674 INFO L225 Difference]: With dead ends: 1393 [2019-11-07 00:38:32,675 INFO L226 Difference]: Without dead ends: 774 [2019-11-07 00:38:32,678 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 245 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:38:32,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2019-11-07 00:38:32,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 771. [2019-11-07 00:38:32,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 771 states. [2019-11-07 00:38:32,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 1233 transitions. [2019-11-07 00:38:32,706 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 1233 transitions. Word has length 124 [2019-11-07 00:38:32,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:38:32,706 INFO L462 AbstractCegarLoop]: Abstraction has 771 states and 1233 transitions. [2019-11-07 00:38:32,706 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 00:38:32,706 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 1233 transitions. [2019-11-07 00:38:32,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-11-07 00:38:32,709 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:38:32,710 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:38:32,918 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:38:32,918 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:38:32,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:38:32,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1521963814, now seen corresponding path program 1 times [2019-11-07 00:38:32,919 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:38:32,919 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751215464] [2019-11-07 00:38:32,919 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:38:32,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:33,022 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 00:38:33,022 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751215464] [2019-11-07 00:38:33,023 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193245059] [2019-11-07 00:38:33,023 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:38:33,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:33,678 INFO L256 TraceCheckSpWp]: Trace formula consists of 2889 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:38:33,682 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:38:33,704 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-07 00:38:33,704 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:38:33,822 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 00:38:33,822 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:38:33,823 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [4] total 8 [2019-11-07 00:38:33,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755067476] [2019-11-07 00:38:33,824 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 00:38:33,824 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:38:33,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 00:38:33,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:38:33,825 INFO L87 Difference]: Start difference. First operand 771 states and 1233 transitions. Second operand 6 states. [2019-11-07 00:38:33,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:38:33,908 INFO L93 Difference]: Finished difference Result 1447 states and 2324 transitions. [2019-11-07 00:38:33,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:38:33,908 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 125 [2019-11-07 00:38:33,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:38:33,913 INFO L225 Difference]: With dead ends: 1447 [2019-11-07 00:38:33,914 INFO L226 Difference]: Without dead ends: 767 [2019-11-07 00:38:33,917 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 248 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2019-11-07 00:38:33,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2019-11-07 00:38:33,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 764. [2019-11-07 00:38:33,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 764 states. [2019-11-07 00:38:33,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 1220 transitions. [2019-11-07 00:38:33,955 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 1220 transitions. Word has length 125 [2019-11-07 00:38:33,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:38:33,955 INFO L462 AbstractCegarLoop]: Abstraction has 764 states and 1220 transitions. [2019-11-07 00:38:33,956 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 00:38:33,956 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 1220 transitions. [2019-11-07 00:38:33,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-11-07 00:38:33,960 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:38:33,961 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:38:34,175 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:38:34,176 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:38:34,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:38:34,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1779748070, now seen corresponding path program 1 times [2019-11-07 00:38:34,176 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:38:34,176 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125068389] [2019-11-07 00:38:34,176 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:38:34,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:34,259 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 00:38:34,259 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125068389] [2019-11-07 00:38:34,259 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845563799] [2019-11-07 00:38:34,260 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:38:34,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:34,883 INFO L256 TraceCheckSpWp]: Trace formula consists of 2889 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-07 00:38:34,889 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:38:34,970 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-07 00:38:34,970 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:38:35,096 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2019-11-07 00:38:35,097 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:38:35,097 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2019-11-07 00:38:35,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869608057] [2019-11-07 00:38:35,098 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:38:35,098 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:38:35,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:38:35,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-07 00:38:35,099 INFO L87 Difference]: Start difference. First operand 764 states and 1220 transitions. Second operand 4 states. [2019-11-07 00:38:36,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:38:36,365 INFO L93 Difference]: Finished difference Result 2599 states and 4211 transitions. [2019-11-07 00:38:36,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 00:38:36,366 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 126 [2019-11-07 00:38:36,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:38:36,379 INFO L225 Difference]: With dead ends: 2599 [2019-11-07 00:38:36,379 INFO L226 Difference]: Without dead ends: 1984 [2019-11-07 00:38:36,383 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 246 SyntacticMatches, 5 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-07 00:38:36,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1984 states. [2019-11-07 00:38:36,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1984 to 1842. [2019-11-07 00:38:36,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1842 states. [2019-11-07 00:38:36,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1842 states to 1842 states and 2988 transitions. [2019-11-07 00:38:36,468 INFO L78 Accepts]: Start accepts. Automaton has 1842 states and 2988 transitions. Word has length 126 [2019-11-07 00:38:36,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:38:36,468 INFO L462 AbstractCegarLoop]: Abstraction has 1842 states and 2988 transitions. [2019-11-07 00:38:36,468 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:38:36,469 INFO L276 IsEmpty]: Start isEmpty. Operand 1842 states and 2988 transitions. [2019-11-07 00:38:36,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2019-11-07 00:38:36,475 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:38:36,475 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:38:36,682 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:38:36,683 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:38:36,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:38:36,683 INFO L82 PathProgramCache]: Analyzing trace with hash -979147877, now seen corresponding path program 1 times [2019-11-07 00:38:36,683 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:38:36,684 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049638032] [2019-11-07 00:38:36,684 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:38:36,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:36,801 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 00:38:36,801 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049638032] [2019-11-07 00:38:36,801 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009637287] [2019-11-07 00:38:36,802 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:38:37,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:37,441 INFO L256 TraceCheckSpWp]: Trace formula consists of 3254 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-07 00:38:37,448 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:38:37,515 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-07 00:38:37,515 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:38:37,722 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2019-11-07 00:38:37,723 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:38:37,723 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [4] total 9 [2019-11-07 00:38:37,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318515220] [2019-11-07 00:38:37,725 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 00:38:37,725 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:38:37,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 00:38:37,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-11-07 00:38:37,726 INFO L87 Difference]: Start difference. First operand 1842 states and 2988 transitions. Second operand 7 states. [2019-11-07 00:38:38,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:38:38,965 INFO L93 Difference]: Finished difference Result 4157 states and 6750 transitions. [2019-11-07 00:38:38,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-07 00:38:38,965 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 175 [2019-11-07 00:38:38,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:38:38,980 INFO L225 Difference]: With dead ends: 4157 [2019-11-07 00:38:38,981 INFO L226 Difference]: Without dead ends: 2464 [2019-11-07 00:38:38,988 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 337 SyntacticMatches, 9 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2019-11-07 00:38:38,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2464 states. [2019-11-07 00:38:39,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2464 to 2460. [2019-11-07 00:38:39,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2460 states. [2019-11-07 00:38:39,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2460 states to 2460 states and 3966 transitions. [2019-11-07 00:38:39,085 INFO L78 Accepts]: Start accepts. Automaton has 2460 states and 3966 transitions. Word has length 175 [2019-11-07 00:38:39,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:38:39,085 INFO L462 AbstractCegarLoop]: Abstraction has 2460 states and 3966 transitions. [2019-11-07 00:38:39,085 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 00:38:39,085 INFO L276 IsEmpty]: Start isEmpty. Operand 2460 states and 3966 transitions. [2019-11-07 00:38:39,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2019-11-07 00:38:39,094 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:38:39,094 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:38:39,303 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:38:39,303 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:38:39,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:38:39,304 INFO L82 PathProgramCache]: Analyzing trace with hash 2093874489, now seen corresponding path program 1 times [2019-11-07 00:38:39,304 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:38:39,304 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458192907] [2019-11-07 00:38:39,304 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:38:39,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:39,418 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 00:38:39,419 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458192907] [2019-11-07 00:38:39,419 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138449056] [2019-11-07 00:38:39,419 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:38:40,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:40,079 INFO L256 TraceCheckSpWp]: Trace formula consists of 3254 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-07 00:38:40,085 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:38:40,109 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-07 00:38:40,110 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:38:40,248 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 00:38:40,249 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:38:40,249 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 5 [2019-11-07 00:38:40,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612286985] [2019-11-07 00:38:40,250 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:38:40,250 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:38:40,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:38:40,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-07 00:38:40,250 INFO L87 Difference]: Start difference. First operand 2460 states and 3966 transitions. Second operand 4 states. [2019-11-07 00:38:40,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:38:40,363 INFO L93 Difference]: Finished difference Result 4879 states and 7896 transitions. [2019-11-07 00:38:40,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:38:40,363 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 176 [2019-11-07 00:38:40,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:38:40,379 INFO L225 Difference]: With dead ends: 4879 [2019-11-07 00:38:40,379 INFO L226 Difference]: Without dead ends: 2437 [2019-11-07 00:38:40,389 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 352 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-11-07 00:38:40,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2437 states. [2019-11-07 00:38:40,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2437 to 2437. [2019-11-07 00:38:40,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2437 states. [2019-11-07 00:38:40,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2437 states to 2437 states and 3919 transitions. [2019-11-07 00:38:40,481 INFO L78 Accepts]: Start accepts. Automaton has 2437 states and 3919 transitions. Word has length 176 [2019-11-07 00:38:40,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:38:40,481 INFO L462 AbstractCegarLoop]: Abstraction has 2437 states and 3919 transitions. [2019-11-07 00:38:40,481 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:38:40,481 INFO L276 IsEmpty]: Start isEmpty. Operand 2437 states and 3919 transitions. [2019-11-07 00:38:40,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2019-11-07 00:38:40,488 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:38:40,489 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:38:40,696 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:38:40,696 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:38:40,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:38:40,697 INFO L82 PathProgramCache]: Analyzing trace with hash 484285150, now seen corresponding path program 1 times [2019-11-07 00:38:40,697 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:38:40,697 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408740002] [2019-11-07 00:38:40,697 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:38:40,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:40,917 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-07 00:38:40,918 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408740002] [2019-11-07 00:38:40,918 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711990493] [2019-11-07 00:38:40,918 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:38:41,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:41,518 INFO L256 TraceCheckSpWp]: Trace formula consists of 3253 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-07 00:38:41,523 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:38:41,594 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-07 00:38:41,595 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:38:41,840 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-07 00:38:41,840 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:38:41,840 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 13 [2019-11-07 00:38:41,841 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354810510] [2019-11-07 00:38:41,843 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 00:38:41,843 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:38:41,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 00:38:41,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2019-11-07 00:38:41,844 INFO L87 Difference]: Start difference. First operand 2437 states and 3919 transitions. Second operand 7 states. [2019-11-07 00:38:42,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:38:42,022 INFO L93 Difference]: Finished difference Result 4848 states and 7797 transitions. [2019-11-07 00:38:42,023 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:38:42,023 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 174 [2019-11-07 00:38:42,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:38:42,045 INFO L225 Difference]: With dead ends: 4848 [2019-11-07 00:38:42,045 INFO L226 Difference]: Without dead ends: 2459 [2019-11-07 00:38:42,057 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 338 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2019-11-07 00:38:42,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2459 states. [2019-11-07 00:38:42,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2459 to 2431. [2019-11-07 00:38:42,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2431 states. [2019-11-07 00:38:42,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2431 states to 2431 states and 3905 transitions. [2019-11-07 00:38:42,173 INFO L78 Accepts]: Start accepts. Automaton has 2431 states and 3905 transitions. Word has length 174 [2019-11-07 00:38:42,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:38:42,174 INFO L462 AbstractCegarLoop]: Abstraction has 2431 states and 3905 transitions. [2019-11-07 00:38:42,174 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 00:38:42,174 INFO L276 IsEmpty]: Start isEmpty. Operand 2431 states and 3905 transitions. [2019-11-07 00:38:42,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2019-11-07 00:38:42,185 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:38:42,186 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:38:42,395 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:38:42,395 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:38:42,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:38:42,396 INFO L82 PathProgramCache]: Analyzing trace with hash 623448220, now seen corresponding path program 1 times [2019-11-07 00:38:42,396 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:38:42,396 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715187211] [2019-11-07 00:38:42,397 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:38:42,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:42,534 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-07 00:38:42,534 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715187211] [2019-11-07 00:38:42,534 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924184243] [2019-11-07 00:38:42,534 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:38:43,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:43,303 INFO L256 TraceCheckSpWp]: Trace formula consists of 3249 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-07 00:38:43,306 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:38:43,379 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-07 00:38:43,380 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:38:43,686 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 00:38:43,796 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-07 00:38:43,796 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:38:43,796 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 9] total 19 [2019-11-07 00:38:43,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099355518] [2019-11-07 00:38:43,797 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-07 00:38:43,797 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:38:43,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-07 00:38:43,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2019-11-07 00:38:43,798 INFO L87 Difference]: Start difference. First operand 2431 states and 3905 transitions. Second operand 9 states. [2019-11-07 00:38:44,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:38:44,060 INFO L93 Difference]: Finished difference Result 4853 states and 7801 transitions. [2019-11-07 00:38:44,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-07 00:38:44,061 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 174 [2019-11-07 00:38:44,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:38:44,077 INFO L225 Difference]: With dead ends: 4853 [2019-11-07 00:38:44,077 INFO L226 Difference]: Without dead ends: 2471 [2019-11-07 00:38:44,087 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 333 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2019-11-07 00:38:44,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2471 states. [2019-11-07 00:38:44,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2471 to 2433. [2019-11-07 00:38:44,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2433 states. [2019-11-07 00:38:44,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2433 states to 2433 states and 3909 transitions. [2019-11-07 00:38:44,184 INFO L78 Accepts]: Start accepts. Automaton has 2433 states and 3909 transitions. Word has length 174 [2019-11-07 00:38:44,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:38:44,184 INFO L462 AbstractCegarLoop]: Abstraction has 2433 states and 3909 transitions. [2019-11-07 00:38:44,184 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-07 00:38:44,184 INFO L276 IsEmpty]: Start isEmpty. Operand 2433 states and 3909 transitions. [2019-11-07 00:38:44,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2019-11-07 00:38:44,195 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:38:44,195 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:38:44,404 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:38:44,404 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:38:44,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:38:44,404 INFO L82 PathProgramCache]: Analyzing trace with hash 2081498303, now seen corresponding path program 1 times [2019-11-07 00:38:44,405 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:38:44,405 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994895484] [2019-11-07 00:38:44,405 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:38:44,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:44,525 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-07 00:38:44,525 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994895484] [2019-11-07 00:38:44,525 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409990772] [2019-11-07 00:38:44,525 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:38:45,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:45,199 INFO L256 TraceCheckSpWp]: Trace formula consists of 3250 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-07 00:38:45,215 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:38:45,298 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-07 00:38:45,298 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:38:45,566 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 00:38:45,663 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-07 00:38:45,664 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:38:45,664 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 9] total 19 [2019-11-07 00:38:45,664 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567240291] [2019-11-07 00:38:45,665 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-07 00:38:45,665 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:38:45,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-07 00:38:45,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2019-11-07 00:38:45,665 INFO L87 Difference]: Start difference. First operand 2433 states and 3909 transitions. Second operand 9 states. [2019-11-07 00:38:46,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:38:46,318 INFO L93 Difference]: Finished difference Result 4854 states and 7805 transitions. [2019-11-07 00:38:46,319 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-07 00:38:46,319 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 175 [2019-11-07 00:38:46,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:38:46,335 INFO L225 Difference]: With dead ends: 4854 [2019-11-07 00:38:46,335 INFO L226 Difference]: Without dead ends: 2470 [2019-11-07 00:38:46,346 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 335 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2019-11-07 00:38:46,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2470 states. [2019-11-07 00:38:46,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2470 to 2433. [2019-11-07 00:38:46,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2433 states. [2019-11-07 00:38:46,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2433 states to 2433 states and 3909 transitions. [2019-11-07 00:38:46,440 INFO L78 Accepts]: Start accepts. Automaton has 2433 states and 3909 transitions. Word has length 175 [2019-11-07 00:38:46,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:38:46,441 INFO L462 AbstractCegarLoop]: Abstraction has 2433 states and 3909 transitions. [2019-11-07 00:38:46,441 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-07 00:38:46,441 INFO L276 IsEmpty]: Start isEmpty. Operand 2433 states and 3909 transitions. [2019-11-07 00:38:46,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2019-11-07 00:38:46,448 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:38:46,448 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:38:46,656 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:38:46,656 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:38:46,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:38:46,657 INFO L82 PathProgramCache]: Analyzing trace with hash 945076865, now seen corresponding path program 1 times [2019-11-07 00:38:46,657 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:38:46,657 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631489716] [2019-11-07 00:38:46,657 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:38:46,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:46,780 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-07 00:38:46,781 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631489716] [2019-11-07 00:38:46,781 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045035582] [2019-11-07 00:38:46,781 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:38:47,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:47,437 INFO L256 TraceCheckSpWp]: Trace formula consists of 3251 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-07 00:38:47,440 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:38:47,519 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-07 00:38:47,519 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:38:47,790 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 00:38:47,867 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-07 00:38:47,868 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:38:47,868 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 9] total 16 [2019-11-07 00:38:47,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090848609] [2019-11-07 00:38:47,869 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-07 00:38:47,869 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:38:47,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-07 00:38:47,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2019-11-07 00:38:47,869 INFO L87 Difference]: Start difference. First operand 2433 states and 3909 transitions. Second operand 9 states. [2019-11-07 00:38:48,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:38:48,103 INFO L93 Difference]: Finished difference Result 4855 states and 7809 transitions. [2019-11-07 00:38:48,104 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-07 00:38:48,104 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 176 [2019-11-07 00:38:48,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:38:48,117 INFO L225 Difference]: With dead ends: 4855 [2019-11-07 00:38:48,117 INFO L226 Difference]: Without dead ends: 2471 [2019-11-07 00:38:48,126 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 337 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2019-11-07 00:38:48,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2471 states. [2019-11-07 00:38:48,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2471 to 2433. [2019-11-07 00:38:48,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2433 states. [2019-11-07 00:38:48,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2433 states to 2433 states and 3909 transitions. [2019-11-07 00:38:48,196 INFO L78 Accepts]: Start accepts. Automaton has 2433 states and 3909 transitions. Word has length 176 [2019-11-07 00:38:48,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:38:48,196 INFO L462 AbstractCegarLoop]: Abstraction has 2433 states and 3909 transitions. [2019-11-07 00:38:48,197 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-07 00:38:48,197 INFO L276 IsEmpty]: Start isEmpty. Operand 2433 states and 3909 transitions. [2019-11-07 00:38:48,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2019-11-07 00:38:48,206 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:38:48,206 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:38:48,415 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:38:48,415 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:38:48,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:38:48,416 INFO L82 PathProgramCache]: Analyzing trace with hash 984416900, now seen corresponding path program 1 times [2019-11-07 00:38:48,416 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:38:48,417 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083067322] [2019-11-07 00:38:48,417 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:38:48,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:48,528 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-07 00:38:48,528 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083067322] [2019-11-07 00:38:48,528 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552673549] [2019-11-07 00:38:48,529 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:38:49,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:38:49,359 INFO L256 TraceCheckSpWp]: Trace formula consists of 3252 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-07 00:38:49,363 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:38:49,381 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-07 00:38:49,381 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:38:49,568 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-07 00:38:49,568 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:38:49,568 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 8 [2019-11-07 00:38:49,568 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116581613] [2019-11-07 00:38:49,569 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 00:38:49,569 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:38:49,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 00:38:49,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:38:49,569 INFO L87 Difference]: Start difference. First operand 2433 states and 3909 transitions. Second operand 7 states. [2019-11-07 00:38:49,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:38:49,711 INFO L93 Difference]: Finished difference Result 4836 states and 7782 transitions. [2019-11-07 00:38:49,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:38:49,712 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 177 [2019-11-07 00:38:49,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:38:49,723 INFO L225 Difference]: With dead ends: 4836 [2019-11-07 00:38:49,724 INFO L226 Difference]: Without dead ends: 2444 [2019-11-07 00:38:49,731 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 354 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-11-07 00:38:49,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2444 states.