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_product29.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:07:34,094 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:07:34,097 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:07:34,115 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:07:34,116 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:07:34,117 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:07:34,118 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:07:34,120 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:07:34,121 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:07:34,122 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:07:34,123 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:07:34,124 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:07:34,125 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:07:34,126 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:07:34,127 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:07:34,128 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:07:34,128 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:07:34,129 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:07:34,131 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:07:34,133 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:07:34,135 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:07:34,136 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:07:34,137 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:07:34,138 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:07:34,140 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 01:07:34,140 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 01:07:34,140 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 01:07:34,141 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 01:07:34,142 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 01:07:34,143 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 01:07:34,143 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 01:07:34,144 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 01:07:34,144 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 01:07:34,145 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 01:07:34,146 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 01:07:34,146 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 01:07:34,149 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 01:07:34,150 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 01:07:34,150 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:07:34,151 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:07:34,152 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:07:34,152 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 01:07:34,178 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:07:34,178 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:07:34,180 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:07:34,180 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:07:34,181 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:07:34,181 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:07:34,181 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:07:34,181 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:07:34,181 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:07:34,182 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:07:34,183 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:07:34,183 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:07:34,183 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:07:34,184 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:07:34,184 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:07:34,184 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:07:34,184 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:07:34,184 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:07:34,185 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:07:34,185 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:07:34,185 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:07:34,185 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:07:34,186 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:07:34,186 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:07:34,186 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:07:34,186 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:07:34,186 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:07:34,187 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:07:34,187 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-15 01:07:34,491 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:07:34,503 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:07:34,506 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:07:34,508 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:07:34,508 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:07:34,509 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec13_product29.cil.c [2019-10-15 01:07:34,574 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1072a8fb7/0f6f8f12ae1e47518f48e954b33704cc/FLAG08cf8be17 [2019-10-15 01:07:35,247 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:07:35,250 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec13_product29.cil.c [2019-10-15 01:07:35,285 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1072a8fb7/0f6f8f12ae1e47518f48e954b33704cc/FLAG08cf8be17 [2019-10-15 01:07:35,427 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1072a8fb7/0f6f8f12ae1e47518f48e954b33704cc [2019-10-15 01:07:35,440 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:07:35,442 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:07:35,444 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:07:35,444 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:07:35,448 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:07:35,449 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:07:35" (1/1) ... [2019-10-15 01:07:35,452 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14543c48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:07:35, skipping insertion in model container [2019-10-15 01:07:35,452 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:07:35" (1/1) ... [2019-10-15 01:07:35,462 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:07:35,556 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:07:36,326 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:07:36,348 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:07:36,501 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:07:36,562 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:07:36,562 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:07:36 WrapperNode [2019-10-15 01:07:36,563 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:07:36,563 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:07:36,564 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:07:36,564 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:07:36,578 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:07:36" (1/1) ... [2019-10-15 01:07:36,579 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:07:36" (1/1) ... [2019-10-15 01:07:36,610 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:07:36" (1/1) ... [2019-10-15 01:07:36,611 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:07:36" (1/1) ... [2019-10-15 01:07:36,695 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:07:36" (1/1) ... [2019-10-15 01:07:36,739 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:07:36" (1/1) ... [2019-10-15 01:07:36,764 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:07:36" (1/1) ... [2019-10-15 01:07:36,794 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:07:36,795 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:07:36,795 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:07:36,797 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:07:36,798 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:07:36" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:07:36,873 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:07:36,873 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:07:36,873 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-15 01:07:36,873 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-10-15 01:07:36,874 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-10-15 01:07:36,875 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-10-15 01:07:36,875 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-10-15 01:07:36,875 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-10-15 01:07:36,875 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-10-15 01:07:36,876 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-10-15 01:07:36,876 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-10-15 01:07:36,876 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-15 01:07:36,877 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-10-15 01:07:36,878 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-10-15 01:07:36,878 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-10-15 01:07:36,878 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-10-15 01:07:36,881 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-10-15 01:07:36,881 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-10-15 01:07:36,882 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-10-15 01:07:36,882 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-10-15 01:07:36,882 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-10-15 01:07:36,883 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__weight [2019-10-15 01:07:36,884 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-10-15 01:07:36,884 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-10-15 01:07:36,884 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-10-15 01:07:36,884 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-10-15 01:07:36,884 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-10-15 01:07:36,885 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-10-15 01:07:36,885 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-10-15 01:07:36,885 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-10-15 01:07:36,885 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-10-15 01:07:36,885 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-10-15 01:07:36,885 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2019-10-15 01:07:36,886 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-10-15 01:07:36,886 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-10-15 01:07:36,886 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-10-15 01:07:36,886 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-10-15 01:07:36,887 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-10-15 01:07:36,887 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-10-15 01:07:36,887 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-10-15 01:07:36,887 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-15 01:07:36,887 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-10-15 01:07:36,888 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-10-15 01:07:36,888 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification13_spec__1 [2019-10-15 01:07:36,888 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification13_spec__2 [2019-10-15 01:07:36,888 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-15 01:07:36,888 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-10-15 01:07:36,889 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-10-15 01:07:36,889 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-10-15 01:07:36,889 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-10-15 01:07:36,889 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-10-15 01:07:36,889 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-10-15 01:07:36,889 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-10-15 01:07:36,890 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-10-15 01:07:36,890 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-10-15 01:07:36,890 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-10-15 01:07:36,890 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-15 01:07:36,890 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-10-15 01:07:36,890 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-10-15 01:07:36,891 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-10-15 01:07:36,891 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-15 01:07:36,891 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-10-15 01:07:36,892 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-15 01:07:36,892 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-15 01:07:36,892 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:07:36,892 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-15 01:07:36,893 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-15 01:07:36,893 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-15 01:07:36,893 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-15 01:07:36,893 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-15 01:07:36,894 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-15 01:07:36,894 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-15 01:07:36,894 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-15 01:07:36,895 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-15 01:07:36,895 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-15 01:07:36,895 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:07:36,895 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:07:36,896 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-10-15 01:07:36,896 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-10-15 01:07:36,897 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-10-15 01:07:36,897 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-10-15 01:07:36,897 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-10-15 01:07:36,897 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-10-15 01:07:36,897 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-10-15 01:07:36,898 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-10-15 01:07:36,898 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-10-15 01:07:36,899 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-10-15 01:07:36,899 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-10-15 01:07:36,899 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-10-15 01:07:36,900 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-15 01:07:36,900 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-15 01:07:36,900 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-10-15 01:07:36,900 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-10-15 01:07:36,900 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-10-15 01:07:36,900 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-15 01:07:36,901 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-10-15 01:07:36,901 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-15 01:07:36,901 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-10-15 01:07:36,901 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-10-15 01:07:36,901 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-10-15 01:07:36,902 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-10-15 01:07:36,902 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-10-15 01:07:36,902 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-10-15 01:07:36,902 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-10-15 01:07:36,902 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-10-15 01:07:36,902 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-10-15 01:07:36,903 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-10-15 01:07:36,903 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-10-15 01:07:36,903 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-10-15 01:07:36,903 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__weight [2019-10-15 01:07:36,903 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-10-15 01:07:36,904 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-10-15 01:07:36,904 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-10-15 01:07:36,904 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-10-15 01:07:36,904 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-10-15 01:07:36,904 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2019-10-15 01:07:36,905 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-10-15 01:07:36,905 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-10-15 01:07:36,905 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-10-15 01:07:36,905 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-10-15 01:07:36,906 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-10-15 01:07:36,906 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-10-15 01:07:36,906 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification13_spec__1 [2019-10-15 01:07:36,907 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification13_spec__2 [2019-10-15 01:07:36,908 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:07:36,908 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-10-15 01:07:36,908 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-15 01:07:36,909 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-10-15 01:07:36,909 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-10-15 01:07:36,909 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:07:36,909 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-10-15 01:07:36,910 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-10-15 01:07:36,911 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-10-15 01:07:36,911 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-10-15 01:07:36,911 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-10-15 01:07:36,911 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-10-15 01:07:36,912 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-10-15 01:07:36,915 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-15 01:07:36,916 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-10-15 01:07:36,916 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-15 01:07:36,917 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-15 01:07:36,917 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-15 01:07:36,917 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-15 01:07:36,918 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-15 01:07:36,925 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:07:36,925 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-15 01:07:36,926 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-15 01:07:36,926 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-15 01:07:36,926 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-15 01:07:36,926 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-15 01:07:36,926 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-15 01:07:36,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-15 01:07:36,927 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:07:36,927 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-15 01:07:36,927 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-15 01:07:36,929 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:07:36,929 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-15 01:07:36,929 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-15 01:07:36,930 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:07:36,930 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-15 01:07:36,930 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-15 01:07:36,930 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-15 01:07:36,930 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:07:36,930 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-15 01:07:36,931 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:07:39,254 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:07:39,254 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-15 01:07:39,256 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:07:39 BoogieIcfgContainer [2019-10-15 01:07:39,256 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:07:39,258 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:07:39,258 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:07:39,261 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:07:39,262 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:07:35" (1/3) ... [2019-10-15 01:07:39,263 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@227bb8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:07:39, skipping insertion in model container [2019-10-15 01:07:39,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:07:36" (2/3) ... [2019-10-15 01:07:39,263 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@227bb8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:07:39, skipping insertion in model container [2019-10-15 01:07:39,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:07:39" (3/3) ... [2019-10-15 01:07:39,265 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec13_product29.cil.c [2019-10-15 01:07:39,275 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:07:39,285 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:07:39,298 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:07:39,340 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:07:39,340 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:07:39,340 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:07:39,341 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:07:39,341 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:07:39,341 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:07:39,341 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:07:39,341 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:07:39,386 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states. [2019-10-15 01:07:39,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-10-15 01:07:39,432 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:07:39,433 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:07:39,435 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:07:39,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:07:39,442 INFO L82 PathProgramCache]: Analyzing trace with hash -332119901, now seen corresponding path program 1 times [2019-10-15 01:07:39,452 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:07:39,452 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638099703] [2019-10-15 01:07:39,453 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:39,453 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:39,453 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:07:39,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:40,121 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-15 01:07:40,122 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638099703] [2019-10-15 01:07:40,123 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880192376] [2019-10-15 01:07:40,124 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:40,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:40,734 INFO L256 TraceCheckSpWp]: Trace formula consists of 2987 conjuncts, 1 conjunts are in the unsatisfiable core [2019-10-15 01:07:40,751 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:07:40,793 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-15 01:07:40,793 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:07:40,931 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-15 01:07:40,932 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:07:40,933 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7, 2] total 7 [2019-10-15 01:07:40,933 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386456462] [2019-10-15 01:07:40,939 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-15 01:07:40,941 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:07:40,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-15 01:07:40,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:07:40,958 INFO L87 Difference]: Start difference. First operand 804 states. Second operand 2 states. [2019-10-15 01:07:41,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:07:41,069 INFO L93 Difference]: Finished difference Result 1301 states and 2111 transitions. [2019-10-15 01:07:41,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-15 01:07:41,071 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 152 [2019-10-15 01:07:41,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:07:41,114 INFO L225 Difference]: With dead ends: 1301 [2019-10-15 01:07:41,114 INFO L226 Difference]: Without dead ends: 658 [2019-10-15 01:07:41,129 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 307 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:07:41,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2019-10-15 01:07:41,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 658. [2019-10-15 01:07:41,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 658 states. [2019-10-15 01:07:41,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 1047 transitions. [2019-10-15 01:07:41,267 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 1047 transitions. Word has length 152 [2019-10-15 01:07:41,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:07:41,270 INFO L462 AbstractCegarLoop]: Abstraction has 658 states and 1047 transitions. [2019-10-15 01:07:41,270 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-15 01:07:41,271 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 1047 transitions. [2019-10-15 01:07:41,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-10-15 01:07:41,283 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:07:41,283 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:07:41,491 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:41,492 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:07:41,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:07:41,492 INFO L82 PathProgramCache]: Analyzing trace with hash 474844739, now seen corresponding path program 1 times [2019-10-15 01:07:41,493 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:07:41,493 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553474083] [2019-10-15 01:07:41,493 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:41,494 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:41,494 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:07:41,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:41,842 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-15 01:07:41,843 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553474083] [2019-10-15 01:07:41,844 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640817488] [2019-10-15 01:07:41,844 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:42,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:42,399 INFO L256 TraceCheckSpWp]: Trace formula consists of 2981 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:07:42,414 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:07:42,477 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:07:42,478 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:07:42,689 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2019-10-15 01:07:42,804 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-15 01:07:42,804 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:07:42,805 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 4] total 10 [2019-10-15 01:07:42,805 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306388253] [2019-10-15 01:07:42,806 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:07:42,807 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:07:42,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:07:42,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-10-15 01:07:42,808 INFO L87 Difference]: Start difference. First operand 658 states and 1047 transitions. Second operand 4 states. [2019-10-15 01:07:42,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:07:42,978 INFO L93 Difference]: Finished difference Result 1299 states and 2084 transitions. [2019-10-15 01:07:42,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:07:42,981 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 152 [2019-10-15 01:07:42,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:07:42,993 INFO L225 Difference]: With dead ends: 1299 [2019-10-15 01:07:42,993 INFO L226 Difference]: Without dead ends: 667 [2019-10-15 01:07:42,999 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 302 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-10-15 01:07:43,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2019-10-15 01:07:43,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 667. [2019-10-15 01:07:43,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 667 states. [2019-10-15 01:07:43,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 1061 transitions. [2019-10-15 01:07:43,050 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 1061 transitions. Word has length 152 [2019-10-15 01:07:43,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:07:43,051 INFO L462 AbstractCegarLoop]: Abstraction has 667 states and 1061 transitions. [2019-10-15 01:07:43,051 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:07:43,051 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 1061 transitions. [2019-10-15 01:07:43,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-10-15 01:07:43,058 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:07:43,058 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:07:43,271 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:43,272 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:07:43,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:07:43,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1998614119, now seen corresponding path program 1 times [2019-10-15 01:07:43,273 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:07:43,274 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762369892] [2019-10-15 01:07:43,274 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:43,274 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:43,275 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:07:43,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:43,484 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-15 01:07:43,485 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762369892] [2019-10-15 01:07:43,485 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50397335] [2019-10-15 01:07:43,485 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:44,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:44,108 INFO L256 TraceCheckSpWp]: Trace formula consists of 2983 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:07:44,116 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:07:44,213 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-15 01:07:44,213 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:07:44,459 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-15 01:07:44,460 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:07:44,460 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 16 [2019-10-15 01:07:44,460 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968902661] [2019-10-15 01:07:44,461 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-15 01:07:44,461 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:07:44,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-15 01:07:44,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2019-10-15 01:07:44,462 INFO L87 Difference]: Start difference. First operand 667 states and 1061 transitions. Second operand 7 states. [2019-10-15 01:07:44,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:07:44,636 INFO L93 Difference]: Finished difference Result 1317 states and 2109 transitions. [2019-10-15 01:07:44,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:07:44,637 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 154 [2019-10-15 01:07:44,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:07:44,643 INFO L225 Difference]: With dead ends: 1317 [2019-10-15 01:07:44,644 INFO L226 Difference]: Without dead ends: 678 [2019-10-15 01:07:44,648 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 298 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2019-10-15 01:07:44,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2019-10-15 01:07:44,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 674. [2019-10-15 01:07:44,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 674 states. [2019-10-15 01:07:44,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 674 states to 674 states and 1073 transitions. [2019-10-15 01:07:44,681 INFO L78 Accepts]: Start accepts. Automaton has 674 states and 1073 transitions. Word has length 154 [2019-10-15 01:07:44,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:07:44,681 INFO L462 AbstractCegarLoop]: Abstraction has 674 states and 1073 transitions. [2019-10-15 01:07:44,682 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-15 01:07:44,682 INFO L276 IsEmpty]: Start isEmpty. Operand 674 states and 1073 transitions. [2019-10-15 01:07:44,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2019-10-15 01:07:44,687 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:07:44,688 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:07:44,896 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:44,896 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:07:44,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:07:44,897 INFO L82 PathProgramCache]: Analyzing trace with hash -118777742, now seen corresponding path program 1 times [2019-10-15 01:07:44,897 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:07:44,897 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667867415] [2019-10-15 01:07:44,897 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:44,897 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:44,898 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:07:44,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:45,114 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-15 01:07:45,115 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667867415] [2019-10-15 01:07:45,115 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318098248] [2019-10-15 01:07:45,116 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:45,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:45,707 INFO L256 TraceCheckSpWp]: Trace formula consists of 2984 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:07:45,718 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:07:45,753 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:07:45,753 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:07:45,904 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-15 01:07:45,905 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:07:45,905 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-15 01:07:45,905 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872041229] [2019-10-15 01:07:45,906 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:07:45,907 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:07:45,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:07:45,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:07:45,908 INFO L87 Difference]: Start difference. First operand 674 states and 1073 transitions. Second operand 4 states. [2019-10-15 01:07:46,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:07:46,007 INFO L93 Difference]: Finished difference Result 1333 states and 2134 transitions. [2019-10-15 01:07:46,007 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:07:46,008 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 155 [2019-10-15 01:07:46,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:07:46,013 INFO L225 Difference]: With dead ends: 1333 [2019-10-15 01:07:46,014 INFO L226 Difference]: Without dead ends: 685 [2019-10-15 01:07:46,018 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 306 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:07:46,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2019-10-15 01:07:46,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 683. [2019-10-15 01:07:46,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 683 states. [2019-10-15 01:07:46,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 1081 transitions. [2019-10-15 01:07:46,049 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 1081 transitions. Word has length 155 [2019-10-15 01:07:46,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:07:46,050 INFO L462 AbstractCegarLoop]: Abstraction has 683 states and 1081 transitions. [2019-10-15 01:07:46,050 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:07:46,050 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 1081 transitions. [2019-10-15 01:07:46,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2019-10-15 01:07:46,056 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:07:46,056 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:07:46,263 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:46,264 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:07:46,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:07:46,265 INFO L82 PathProgramCache]: Analyzing trace with hash 31725172, now seen corresponding path program 1 times [2019-10-15 01:07:46,265 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:07:46,265 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781157955] [2019-10-15 01:07:46,266 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:46,266 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:46,266 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:07:46,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:46,467 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-15 01:07:46,468 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781157955] [2019-10-15 01:07:46,468 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184081058] [2019-10-15 01:07:46,468 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:46,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:46,961 INFO L256 TraceCheckSpWp]: Trace formula consists of 2984 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:07:46,967 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:07:47,053 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-15 01:07:47,053 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:07:47,330 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-15 01:07:47,330 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:07:47,330 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 16 [2019-10-15 01:07:47,331 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437902493] [2019-10-15 01:07:47,331 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-15 01:07:47,332 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:07:47,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-15 01:07:47,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2019-10-15 01:07:47,332 INFO L87 Difference]: Start difference. First operand 683 states and 1081 transitions. Second operand 7 states. [2019-10-15 01:07:47,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:07:47,507 INFO L93 Difference]: Finished difference Result 1334 states and 2125 transitions. [2019-10-15 01:07:47,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:07:47,508 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 155 [2019-10-15 01:07:47,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:07:47,516 INFO L225 Difference]: With dead ends: 1334 [2019-10-15 01:07:47,516 INFO L226 Difference]: Without dead ends: 692 [2019-10-15 01:07:47,521 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 300 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2019-10-15 01:07:47,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2019-10-15 01:07:47,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 683. [2019-10-15 01:07:47,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 683 states. [2019-10-15 01:07:47,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 1081 transitions. [2019-10-15 01:07:47,566 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 1081 transitions. Word has length 155 [2019-10-15 01:07:47,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:07:47,567 INFO L462 AbstractCegarLoop]: Abstraction has 683 states and 1081 transitions. [2019-10-15 01:07:47,597 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-15 01:07:47,597 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 1081 transitions. [2019-10-15 01:07:47,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2019-10-15 01:07:47,604 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:07:47,604 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:07:47,813 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:47,814 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:07:47,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:07:47,814 INFO L82 PathProgramCache]: Analyzing trace with hash -615340944, now seen corresponding path program 1 times [2019-10-15 01:07:47,815 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:07:47,815 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554278052] [2019-10-15 01:07:47,815 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:47,815 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:47,815 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:07:47,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:47,946 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-15 01:07:47,946 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554278052] [2019-10-15 01:07:47,947 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148680542] [2019-10-15 01:07:47,947 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:48,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:48,555 INFO L256 TraceCheckSpWp]: Trace formula consists of 2986 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:07:48,562 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:07:48,593 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-15 01:07:48,593 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:07:48,728 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:07:48,728 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:07:48,729 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-15 01:07:48,729 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67470879] [2019-10-15 01:07:48,729 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:07:48,730 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:07:48,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:07:48,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:07:48,731 INFO L87 Difference]: Start difference. First operand 683 states and 1081 transitions. Second operand 4 states. [2019-10-15 01:07:48,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:07:48,986 INFO L93 Difference]: Finished difference Result 1367 states and 2195 transitions. [2019-10-15 01:07:48,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:07:48,987 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 158 [2019-10-15 01:07:48,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:07:48,996 INFO L225 Difference]: With dead ends: 1367 [2019-10-15 01:07:48,996 INFO L226 Difference]: Without dead ends: 725 [2019-10-15 01:07:49,001 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 312 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:07:49,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2019-10-15 01:07:49,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 722. [2019-10-15 01:07:49,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 722 states. [2019-10-15 01:07:49,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 722 states to 722 states and 1154 transitions. [2019-10-15 01:07:49,032 INFO L78 Accepts]: Start accepts. Automaton has 722 states and 1154 transitions. Word has length 158 [2019-10-15 01:07:49,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:07:49,032 INFO L462 AbstractCegarLoop]: Abstraction has 722 states and 1154 transitions. [2019-10-15 01:07:49,032 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:07:49,033 INFO L276 IsEmpty]: Start isEmpty. Operand 722 states and 1154 transitions. [2019-10-15 01:07:49,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2019-10-15 01:07:49,038 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:07:49,039 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:07:49,247 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:49,247 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:07:49,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:07:49,248 INFO L82 PathProgramCache]: Analyzing trace with hash -35711704, now seen corresponding path program 1 times [2019-10-15 01:07:49,248 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:07:49,248 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333162463] [2019-10-15 01:07:49,249 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:49,249 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:49,249 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:07:49,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:49,432 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-15 01:07:49,432 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333162463] [2019-10-15 01:07:49,433 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372862497] [2019-10-15 01:07:49,433 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:50,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:50,053 INFO L256 TraceCheckSpWp]: Trace formula consists of 2988 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:07:50,060 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:07:50,090 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:07:50,090 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:07:50,226 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-15 01:07:50,226 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:07:50,226 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [4] total 7 [2019-10-15 01:07:50,227 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841663070] [2019-10-15 01:07:50,228 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:07:50,228 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:07:50,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:07:50,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:07:50,229 INFO L87 Difference]: Start difference. First operand 722 states and 1154 transitions. Second operand 5 states. [2019-10-15 01:07:50,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:07:50,302 INFO L93 Difference]: Finished difference Result 1391 states and 2241 transitions. [2019-10-15 01:07:50,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:07:50,303 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 160 [2019-10-15 01:07:50,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:07:50,309 INFO L225 Difference]: With dead ends: 1391 [2019-10-15 01:07:50,310 INFO L226 Difference]: Without dead ends: 722 [2019-10-15 01:07:50,314 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 317 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:07:50,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2019-10-15 01:07:50,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 722. [2019-10-15 01:07:50,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 722 states. [2019-10-15 01:07:50,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 722 states to 722 states and 1149 transitions. [2019-10-15 01:07:50,340 INFO L78 Accepts]: Start accepts. Automaton has 722 states and 1149 transitions. Word has length 160 [2019-10-15 01:07:50,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:07:50,341 INFO L462 AbstractCegarLoop]: Abstraction has 722 states and 1149 transitions. [2019-10-15 01:07:50,341 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:07:50,342 INFO L276 IsEmpty]: Start isEmpty. Operand 722 states and 1149 transitions. [2019-10-15 01:07:50,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-10-15 01:07:50,347 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:07:50,347 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:07:50,554 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:50,555 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:07:50,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:07:50,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1690094261, now seen corresponding path program 1 times [2019-10-15 01:07:50,556 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:07:50,556 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065677528] [2019-10-15 01:07:50,557 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:50,557 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:50,557 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:07:50,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:50,671 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-15 01:07:50,671 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065677528] [2019-10-15 01:07:50,671 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092800637] [2019-10-15 01:07:50,672 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:51,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:51,309 INFO L256 TraceCheckSpWp]: Trace formula consists of 2989 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:07:51,315 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:07:51,381 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-15 01:07:51,382 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:07:51,621 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-15 01:07:51,622 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:07:51,622 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 13 [2019-10-15 01:07:51,622 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449463148] [2019-10-15 01:07:51,623 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-15 01:07:51,624 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:07:51,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-15 01:07:51,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2019-10-15 01:07:51,624 INFO L87 Difference]: Start difference. First operand 722 states and 1149 transitions. Second operand 11 states. [2019-10-15 01:07:51,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:07:51,832 INFO L93 Difference]: Finished difference Result 1365 states and 2182 transitions. [2019-10-15 01:07:51,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-15 01:07:51,832 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 161 [2019-10-15 01:07:51,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:07:51,838 INFO L225 Difference]: With dead ends: 1365 [2019-10-15 01:07:51,839 INFO L226 Difference]: Without dead ends: 742 [2019-10-15 01:07:51,843 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 313 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2019-10-15 01:07:51,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2019-10-15 01:07:51,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 729. [2019-10-15 01:07:51,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 729 states. [2019-10-15 01:07:51,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 729 states to 729 states and 1160 transitions. [2019-10-15 01:07:51,873 INFO L78 Accepts]: Start accepts. Automaton has 729 states and 1160 transitions. Word has length 161 [2019-10-15 01:07:51,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:07:51,873 INFO L462 AbstractCegarLoop]: Abstraction has 729 states and 1160 transitions. [2019-10-15 01:07:51,873 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-15 01:07:51,874 INFO L276 IsEmpty]: Start isEmpty. Operand 729 states and 1160 transitions. [2019-10-15 01:07:51,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-10-15 01:07:51,879 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:07:51,880 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:07:52,088 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:52,088 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:07:52,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:07:52,089 INFO L82 PathProgramCache]: Analyzing trace with hash -696135748, now seen corresponding path program 1 times [2019-10-15 01:07:52,090 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:07:52,090 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303430389] [2019-10-15 01:07:52,090 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:52,090 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:52,091 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:07:52,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:52,239 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:07:52,240 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303430389] [2019-10-15 01:07:52,240 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902607523] [2019-10-15 01:07:52,240 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:52,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:52,845 INFO L256 TraceCheckSpWp]: Trace formula consists of 2990 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:07:52,852 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:07:52,935 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-15 01:07:52,936 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:07:53,497 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-15 01:07:53,497 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:07:53,497 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 10 [2019-10-15 01:07:53,498 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114021016] [2019-10-15 01:07:53,499 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-15 01:07:53,500 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:07:53,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-15 01:07:53,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-10-15 01:07:53,501 INFO L87 Difference]: Start difference. First operand 729 states and 1160 transitions. Second operand 8 states. [2019-10-15 01:07:53,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:07:53,648 INFO L93 Difference]: Finished difference Result 1363 states and 2178 transitions. [2019-10-15 01:07:53,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:07:53,649 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 162 [2019-10-15 01:07:53,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:07:53,658 INFO L225 Difference]: With dead ends: 1363 [2019-10-15 01:07:53,658 INFO L226 Difference]: Without dead ends: 740 [2019-10-15 01:07:53,663 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 315 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2019-10-15 01:07:53,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2019-10-15 01:07:53,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 733. [2019-10-15 01:07:53,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 733 states. [2019-10-15 01:07:53,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 1165 transitions. [2019-10-15 01:07:53,700 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 1165 transitions. Word has length 162 [2019-10-15 01:07:53,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:07:53,701 INFO L462 AbstractCegarLoop]: Abstraction has 733 states and 1165 transitions. [2019-10-15 01:07:53,701 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-15 01:07:53,701 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 1165 transitions. [2019-10-15 01:07:53,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-10-15 01:07:53,708 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:07:53,709 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:07:53,918 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:53,918 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:07:53,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:07:53,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1193684081, now seen corresponding path program 1 times [2019-10-15 01:07:53,919 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:07:53,919 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620553162] [2019-10-15 01:07:53,920 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:53,920 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:53,920 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:07:53,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:54,072 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:07:54,072 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620553162] [2019-10-15 01:07:54,072 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213881597] [2019-10-15 01:07:54,073 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:54,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:54,788 INFO L256 TraceCheckSpWp]: Trace formula consists of 2991 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:07:54,794 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:07:54,828 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-15 01:07:54,828 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:07:54,963 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-15 01:07:54,963 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:07:54,964 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [4] total 7 [2019-10-15 01:07:54,964 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579286656] [2019-10-15 01:07:54,971 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:07:54,971 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:07:54,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:07:54,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:07:54,972 INFO L87 Difference]: Start difference. First operand 733 states and 1165 transitions. Second operand 5 states. [2019-10-15 01:07:55,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:07:55,193 INFO L93 Difference]: Finished difference Result 1401 states and 2255 transitions. [2019-10-15 01:07:55,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:07:55,193 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 163 [2019-10-15 01:07:55,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:07:55,199 INFO L225 Difference]: With dead ends: 1401 [2019-10-15 01:07:55,199 INFO L226 Difference]: Without dead ends: 778 [2019-10-15 01:07:55,203 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 323 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:07:55,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2019-10-15 01:07:55,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 775. [2019-10-15 01:07:55,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 775 states. [2019-10-15 01:07:55,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 1241 transitions. [2019-10-15 01:07:55,231 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 1241 transitions. Word has length 163 [2019-10-15 01:07:55,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:07:55,231 INFO L462 AbstractCegarLoop]: Abstraction has 775 states and 1241 transitions. [2019-10-15 01:07:55,231 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:07:55,232 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 1241 transitions. [2019-10-15 01:07:55,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2019-10-15 01:07:55,238 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:07:55,238 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:07:55,454 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:55,455 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:07:55,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:07:55,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1972154266, now seen corresponding path program 1 times [2019-10-15 01:07:55,456 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:07:55,456 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079066263] [2019-10-15 01:07:55,457 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:55,457 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:55,457 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:07:55,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:55,629 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-15 01:07:55,630 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079066263] [2019-10-15 01:07:55,630 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762920253] [2019-10-15 01:07:55,630 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:56,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:56,304 INFO L256 TraceCheckSpWp]: Trace formula consists of 2992 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:07:56,311 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:07:56,361 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:07:56,362 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:07:56,514 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-15 01:07:56,515 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:07:56,515 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [4] total 8 [2019-10-15 01:07:56,515 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753465070] [2019-10-15 01:07:56,516 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:07:56,516 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:07:56,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:07:56,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:07:56,517 INFO L87 Difference]: Start difference. First operand 775 states and 1241 transitions. Second operand 6 states. [2019-10-15 01:07:56,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:07:56,589 INFO L93 Difference]: Finished difference Result 1455 states and 2340 transitions. [2019-10-15 01:07:56,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:07:56,590 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 164 [2019-10-15 01:07:56,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:07:56,595 INFO L225 Difference]: With dead ends: 1455 [2019-10-15 01:07:56,596 INFO L226 Difference]: Without dead ends: 771 [2019-10-15 01:07:56,599 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 326 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2019-10-15 01:07:56,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2019-10-15 01:07:56,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 768. [2019-10-15 01:07:56,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 768 states. [2019-10-15 01:07:56,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 1228 transitions. [2019-10-15 01:07:56,624 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 1228 transitions. Word has length 164 [2019-10-15 01:07:56,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:07:56,625 INFO L462 AbstractCegarLoop]: Abstraction has 768 states and 1228 transitions. [2019-10-15 01:07:56,625 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:07:56,625 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 1228 transitions. [2019-10-15 01:07:56,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2019-10-15 01:07:56,631 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:07:56,631 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:07:56,840 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:56,840 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:07:56,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:07:56,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1100933032, now seen corresponding path program 1 times [2019-10-15 01:07:56,841 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:07:56,841 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940802271] [2019-10-15 01:07:56,841 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:56,842 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:56,842 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:07:56,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:56,951 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-15 01:07:56,951 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940802271] [2019-10-15 01:07:56,951 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588361480] [2019-10-15 01:07:56,952 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:57,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:57,559 INFO L256 TraceCheckSpWp]: Trace formula consists of 2992 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-15 01:07:57,565 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:07:57,593 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-15 01:07:57,593 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:07:57,787 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-15 01:07:57,788 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:07:57,788 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 5 [2019-10-15 01:07:57,788 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199472751] [2019-10-15 01:07:57,789 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:07:57,789 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:07:57,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:07:57,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:07:57,789 INFO L87 Difference]: Start difference. First operand 768 states and 1228 transitions. Second operand 4 states. [2019-10-15 01:07:57,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:07:57,860 INFO L93 Difference]: Finished difference Result 1495 states and 2412 transitions. [2019-10-15 01:07:57,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:07:57,860 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 165 [2019-10-15 01:07:57,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:07:57,865 INFO L225 Difference]: With dead ends: 1495 [2019-10-15 01:07:57,866 INFO L226 Difference]: Without dead ends: 745 [2019-10-15 01:07:57,870 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:07:57,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2019-10-15 01:07:57,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 745. [2019-10-15 01:07:57,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 745 states. [2019-10-15 01:07:57,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 1185 transitions. [2019-10-15 01:07:57,894 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 1185 transitions. Word has length 165 [2019-10-15 01:07:57,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:07:57,895 INFO L462 AbstractCegarLoop]: Abstraction has 745 states and 1185 transitions. [2019-10-15 01:07:57,895 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:07:57,895 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 1185 transitions. [2019-10-15 01:07:57,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-10-15 01:07:57,901 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:07:57,901 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:07:58,110 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:58,110 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:07:58,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:07:58,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1009694125, now seen corresponding path program 1 times [2019-10-15 01:07:58,111 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:07:58,112 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366357614] [2019-10-15 01:07:58,112 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:58,112 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:58,112 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:07:58,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:58,270 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-15 01:07:58,270 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366357614] [2019-10-15 01:07:58,270 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559604977] [2019-10-15 01:07:58,271 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:58,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:58,884 INFO L256 TraceCheckSpWp]: Trace formula consists of 2991 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:07:58,889 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:07:58,955 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-15 01:07:58,956 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:07:59,171 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-15 01:07:59,172 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:07:59,172 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 13 [2019-10-15 01:07:59,172 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531566654] [2019-10-15 01:07:59,173 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-15 01:07:59,173 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:07:59,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-15 01:07:59,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2019-10-15 01:07:59,174 INFO L87 Difference]: Start difference. First operand 745 states and 1185 transitions. Second operand 7 states. [2019-10-15 01:07:59,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:07:59,301 INFO L93 Difference]: Finished difference Result 1444 states and 2305 transitions. [2019-10-15 01:07:59,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:07:59,301 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 163 [2019-10-15 01:07:59,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:07:59,306 INFO L225 Difference]: With dead ends: 1444 [2019-10-15 01:07:59,306 INFO L226 Difference]: Without dead ends: 747 [2019-10-15 01:07:59,310 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 316 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2019-10-15 01:07:59,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2019-10-15 01:07:59,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 739. [2019-10-15 01:07:59,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 739 states. [2019-10-15 01:07:59,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 1171 transitions. [2019-10-15 01:07:59,336 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 1171 transitions. Word has length 163 [2019-10-15 01:07:59,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:07:59,336 INFO L462 AbstractCegarLoop]: Abstraction has 739 states and 1171 transitions. [2019-10-15 01:07:59,336 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-15 01:07:59,336 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 1171 transitions. [2019-10-15 01:07:59,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-10-15 01:07:59,341 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:07:59,341 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:07:59,549 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:59,550 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:07:59,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:07:59,550 INFO L82 PathProgramCache]: Analyzing trace with hash -363462827, now seen corresponding path program 1 times [2019-10-15 01:07:59,550 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:07:59,550 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348853029] [2019-10-15 01:07:59,551 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:59,551 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:59,551 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:07:59,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:59,673 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-15 01:07:59,674 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348853029] [2019-10-15 01:07:59,674 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228392147] [2019-10-15 01:07:59,674 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:00,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:00,433 INFO L256 TraceCheckSpWp]: Trace formula consists of 2987 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-15 01:08:00,438 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:00,538 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-15 01:08:00,538 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:00,812 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:08:00,921 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 01:08:00,921 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:08:00,921 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 9] total 19 [2019-10-15 01:08:00,922 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598632730] [2019-10-15 01:08:00,922 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-15 01:08:00,922 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:00,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-15 01:08:00,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2019-10-15 01:08:00,923 INFO L87 Difference]: Start difference. First operand 739 states and 1171 transitions. Second operand 9 states. [2019-10-15 01:08:01,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:01,152 INFO L93 Difference]: Finished difference Result 1441 states and 2297 transitions. [2019-10-15 01:08:01,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-15 01:08:01,152 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 163 [2019-10-15 01:08:01,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:01,157 INFO L225 Difference]: With dead ends: 1441 [2019-10-15 01:08:01,157 INFO L226 Difference]: Without dead ends: 751 [2019-10-15 01:08:01,161 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 311 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2019-10-15 01:08:01,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2019-10-15 01:08:01,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 741. [2019-10-15 01:08:01,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 741 states. [2019-10-15 01:08:01,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 1175 transitions. [2019-10-15 01:08:01,186 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 1175 transitions. Word has length 163 [2019-10-15 01:08:01,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:01,186 INFO L462 AbstractCegarLoop]: Abstraction has 741 states and 1175 transitions. [2019-10-15 01:08:01,186 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-15 01:08:01,186 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 1175 transitions. [2019-10-15 01:08:01,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2019-10-15 01:08:01,192 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:01,192 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:08:01,400 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:01,400 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:01,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:01,401 INFO L82 PathProgramCache]: Analyzing trace with hash -2016603232, now seen corresponding path program 1 times [2019-10-15 01:08:01,401 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:01,401 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229124804] [2019-10-15 01:08:01,402 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:01,402 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:01,402 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:01,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:01,539 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-15 01:08:01,539 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229124804] [2019-10-15 01:08:01,540 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461587439] [2019-10-15 01:08:01,540 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:02,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:02,222 INFO L256 TraceCheckSpWp]: Trace formula consists of 2988 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-15 01:08:02,227 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:02,336 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-15 01:08:02,336 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:02,565 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:08:02,746 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 01:08:02,746 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:08:02,746 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 9] total 19 [2019-10-15 01:08:02,746 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401622943] [2019-10-15 01:08:02,747 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-15 01:08:02,747 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:02,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-15 01:08:02,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2019-10-15 01:08:02,750 INFO L87 Difference]: Start difference. First operand 741 states and 1175 transitions. Second operand 9 states. [2019-10-15 01:08:02,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:02,994 INFO L93 Difference]: Finished difference Result 1442 states and 2301 transitions. [2019-10-15 01:08:02,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-15 01:08:02,994 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 164 [2019-10-15 01:08:02,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:02,999 INFO L225 Difference]: With dead ends: 1442 [2019-10-15 01:08:03,000 INFO L226 Difference]: Without dead ends: 750 [2019-10-15 01:08:03,011 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 313 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2019-10-15 01:08:03,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2019-10-15 01:08:03,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 741. [2019-10-15 01:08:03,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 741 states. [2019-10-15 01:08:03,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 1175 transitions. [2019-10-15 01:08:03,039 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 1175 transitions. Word has length 164 [2019-10-15 01:08:03,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:03,039 INFO L462 AbstractCegarLoop]: Abstraction has 741 states and 1175 transitions. [2019-10-15 01:08:03,039 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-15 01:08:03,039 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 1175 transitions. [2019-10-15 01:08:03,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2019-10-15 01:08:03,044 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:03,044 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:08:03,252 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:03,253 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:03,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:03,253 INFO L82 PathProgramCache]: Analyzing trace with hash -407919536, now seen corresponding path program 1 times [2019-10-15 01:08:03,254 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:03,254 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326410570] [2019-10-15 01:08:03,254 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:03,254 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:03,254 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:03,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:03,457 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-15 01:08:03,457 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326410570] [2019-10-15 01:08:03,458 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221867819] [2019-10-15 01:08:03,458 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:04,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:04,099 INFO L256 TraceCheckSpWp]: Trace formula consists of 2989 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-15 01:08:04,103 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:04,178 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-15 01:08:04,179 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:04,418 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:08:04,528 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 01:08:04,529 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:08:04,529 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 9] total 16 [2019-10-15 01:08:04,530 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341400250] [2019-10-15 01:08:04,530 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-15 01:08:04,531 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:04,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-15 01:08:04,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2019-10-15 01:08:04,532 INFO L87 Difference]: Start difference. First operand 741 states and 1175 transitions. Second operand 9 states. [2019-10-15 01:08:04,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:04,733 INFO L93 Difference]: Finished difference Result 1443 states and 2305 transitions. [2019-10-15 01:08:04,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-15 01:08:04,734 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 165 [2019-10-15 01:08:04,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:04,739 INFO L225 Difference]: With dead ends: 1443 [2019-10-15 01:08:04,739 INFO L226 Difference]: Without dead ends: 751 [2019-10-15 01:08:04,742 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 315 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2019-10-15 01:08:04,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2019-10-15 01:08:04,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 741. [2019-10-15 01:08:04,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 741 states. [2019-10-15 01:08:04,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 1175 transitions. [2019-10-15 01:08:04,772 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 1175 transitions. Word has length 165 [2019-10-15 01:08:04,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:04,773 INFO L462 AbstractCegarLoop]: Abstraction has 741 states and 1175 transitions. [2019-10-15 01:08:04,773 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-15 01:08:04,773 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 1175 transitions. [2019-10-15 01:08:04,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-10-15 01:08:04,778 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:04,778 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:08:04,986 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:04,986 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:04,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:04,987 INFO L82 PathProgramCache]: Analyzing trace with hash -761903813, now seen corresponding path program 1 times [2019-10-15 01:08:04,987 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:04,987 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766751222] [2019-10-15 01:08:04,988 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:04,988 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:04,988 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:05,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:05,140 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-15 01:08:05,141 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766751222] [2019-10-15 01:08:05,141 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138738436] [2019-10-15 01:08:05,141 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:05,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:05,840 INFO L256 TraceCheckSpWp]: Trace formula consists of 2990 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-15 01:08:05,845 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:05,864 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-15 01:08:05,865 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:06,032 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-15 01:08:06,033 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:08:06,033 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 8 [2019-10-15 01:08:06,033 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929016583] [2019-10-15 01:08:06,033 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-15 01:08:06,034 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:06,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-15 01:08:06,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:08:06,034 INFO L87 Difference]: Start difference. First operand 741 states and 1175 transitions. Second operand 7 states. [2019-10-15 01:08:06,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:06,150 INFO L93 Difference]: Finished difference Result 1440 states and 2298 transitions. [2019-10-15 01:08:06,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:08:06,151 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 166 [2019-10-15 01:08:06,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:06,155 INFO L225 Difference]: With dead ends: 1440 [2019-10-15 01:08:06,155 INFO L226 Difference]: Without dead ends: 740 [2019-10-15 01:08:06,159 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:08:06,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2019-10-15 01:08:06,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 734. [2019-10-15 01:08:06,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 734 states. [2019-10-15 01:08:06,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 1159 transitions. [2019-10-15 01:08:06,191 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 1159 transitions. Word has length 166 [2019-10-15 01:08:06,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:06,192 INFO L462 AbstractCegarLoop]: Abstraction has 734 states and 1159 transitions. [2019-10-15 01:08:06,192 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-15 01:08:06,192 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 1159 transitions. [2019-10-15 01:08:06,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2019-10-15 01:08:06,197 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:06,197 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:08:06,405 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:06,406 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:06,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:06,406 INFO L82 PathProgramCache]: Analyzing trace with hash 2040198580, now seen corresponding path program 1 times [2019-10-15 01:08:06,407 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:06,407 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660426539] [2019-10-15 01:08:06,408 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:06,408 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:06,408 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:06,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:06,528 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:08:06,528 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660426539] [2019-10-15 01:08:06,528 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:08:06,528 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 01:08:06,529 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140890898] [2019-10-15 01:08:06,529 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:08:06,529 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:06,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:08:06,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:08:06,530 INFO L87 Difference]: Start difference. First operand 734 states and 1159 transitions. Second operand 4 states. [2019-10-15 01:08:06,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:06,589 INFO L93 Difference]: Finished difference Result 1404 states and 2242 transitions. [2019-10-15 01:08:06,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:08:06,590 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 167 [2019-10-15 01:08:06,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:06,594 INFO L225 Difference]: With dead ends: 1404 [2019-10-15 01:08:06,594 INFO L226 Difference]: Without dead ends: 712 [2019-10-15 01:08:06,597 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:08:06,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states. [2019-10-15 01:08:06,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 712. [2019-10-15 01:08:06,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 712 states. [2019-10-15 01:08:06,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 1121 transitions. [2019-10-15 01:08:06,618 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 1121 transitions. Word has length 167 [2019-10-15 01:08:06,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:06,619 INFO L462 AbstractCegarLoop]: Abstraction has 712 states and 1121 transitions. [2019-10-15 01:08:06,619 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:08:06,619 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 1121 transitions. [2019-10-15 01:08:06,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2019-10-15 01:08:06,622 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:06,623 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:08:06,623 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:06,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:06,623 INFO L82 PathProgramCache]: Analyzing trace with hash 111297517, now seen corresponding path program 1 times [2019-10-15 01:08:06,623 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:06,624 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944500772] [2019-10-15 01:08:06,624 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:06,624 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:06,624 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:06,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:06,760 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-15 01:08:06,761 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944500772] [2019-10-15 01:08:06,761 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:08:06,761 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-15 01:08:06,761 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026221409] [2019-10-15 01:08:06,762 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-15 01:08:06,762 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:06,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-15 01:08:06,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:08:06,763 INFO L87 Difference]: Start difference. First operand 712 states and 1121 transitions. Second operand 7 states. [2019-10-15 01:08:06,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:06,867 INFO L93 Difference]: Finished difference Result 1343 states and 2136 transitions. [2019-10-15 01:08:06,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:08:06,867 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 165 [2019-10-15 01:08:06,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:06,872 INFO L225 Difference]: With dead ends: 1343 [2019-10-15 01:08:06,872 INFO L226 Difference]: Without dead ends: 701 [2019-10-15 01:08:06,875 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:08:06,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2019-10-15 01:08:06,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 698. [2019-10-15 01:08:06,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 698 states. [2019-10-15 01:08:06,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 1093 transitions. [2019-10-15 01:08:06,897 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 1093 transitions. Word has length 165 [2019-10-15 01:08:06,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:06,897 INFO L462 AbstractCegarLoop]: Abstraction has 698 states and 1093 transitions. [2019-10-15 01:08:06,897 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-15 01:08:06,897 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 1093 transitions. [2019-10-15 01:08:06,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-10-15 01:08:06,901 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:06,901 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:08:06,901 INFO L410 AbstractCegarLoop]: === Iteration 20 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:06,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:06,902 INFO L82 PathProgramCache]: Analyzing trace with hash -397307674, now seen corresponding path program 1 times [2019-10-15 01:08:06,902 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:06,902 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197428181] [2019-10-15 01:08:06,902 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:06,903 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:06,903 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:06,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:07,072 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-15 01:08:07,072 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197428181] [2019-10-15 01:08:07,072 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:08:07,073 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2019-10-15 01:08:07,073 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391584814] [2019-10-15 01:08:07,073 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-15 01:08:07,074 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:07,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-15 01:08:07,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2019-10-15 01:08:07,074 INFO L87 Difference]: Start difference. First operand 698 states and 1093 transitions. Second operand 11 states. [2019-10-15 01:08:07,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:07,406 INFO L93 Difference]: Finished difference Result 1334 states and 2116 transitions. [2019-10-15 01:08:07,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-15 01:08:07,407 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 166 [2019-10-15 01:08:07,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:07,411 INFO L225 Difference]: With dead ends: 1334 [2019-10-15 01:08:07,411 INFO L226 Difference]: Without dead ends: 700 [2019-10-15 01:08:07,414 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2019-10-15 01:08:07,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2019-10-15 01:08:07,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 698. [2019-10-15 01:08:07,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 698 states. [2019-10-15 01:08:07,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 1092 transitions. [2019-10-15 01:08:07,436 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 1092 transitions. Word has length 166 [2019-10-15 01:08:07,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:07,436 INFO L462 AbstractCegarLoop]: Abstraction has 698 states and 1092 transitions. [2019-10-15 01:08:07,436 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-15 01:08:07,436 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 1092 transitions. [2019-10-15 01:08:07,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2019-10-15 01:08:07,440 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:07,440 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:08:07,440 INFO L410 AbstractCegarLoop]: === Iteration 21 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:07,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:07,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1137515439, now seen corresponding path program 1 times [2019-10-15 01:08:07,441 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:07,441 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713672792] [2019-10-15 01:08:07,441 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:07,441 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:07,442 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:07,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:07,609 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-15 01:08:07,609 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713672792] [2019-10-15 01:08:07,609 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:08:07,609 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2019-10-15 01:08:07,609 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573816217] [2019-10-15 01:08:07,610 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-15 01:08:07,610 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:07,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-15 01:08:07,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2019-10-15 01:08:07,611 INFO L87 Difference]: Start difference. First operand 698 states and 1092 transitions. Second operand 11 states. [2019-10-15 01:08:07,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:07,970 INFO L93 Difference]: Finished difference Result 1333 states and 2116 transitions. [2019-10-15 01:08:07,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-15 01:08:07,970 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 167 [2019-10-15 01:08:07,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:07,974 INFO L225 Difference]: With dead ends: 1333 [2019-10-15 01:08:07,975 INFO L226 Difference]: Without dead ends: 706 [2019-10-15 01:08:07,978 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2019-10-15 01:08:07,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2019-10-15 01:08:07,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 704. [2019-10-15 01:08:07,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 704 states. [2019-10-15 01:08:08,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704 states to 704 states and 1099 transitions. [2019-10-15 01:08:08,001 INFO L78 Accepts]: Start accepts. Automaton has 704 states and 1099 transitions. Word has length 167 [2019-10-15 01:08:08,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:08,001 INFO L462 AbstractCegarLoop]: Abstraction has 704 states and 1099 transitions. [2019-10-15 01:08:08,002 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-15 01:08:08,002 INFO L276 IsEmpty]: Start isEmpty. Operand 704 states and 1099 transitions. [2019-10-15 01:08:08,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2019-10-15 01:08:08,006 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:08,006 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:08:08,006 INFO L410 AbstractCegarLoop]: === Iteration 22 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:08,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:08,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1719921697, now seen corresponding path program 1 times [2019-10-15 01:08:08,007 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:08,007 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663427209] [2019-10-15 01:08:08,007 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:08,007 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:08,008 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY