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_spec1_product24.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:08:49,408 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:08:49,411 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:08:49,432 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:08:49,433 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:08:49,435 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:08:49,437 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:08:49,442 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:08:49,444 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:08:49,445 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:08:49,446 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:08:49,448 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:08:49,449 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:08:49,450 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:08:49,451 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:08:49,452 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:08:49,453 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:08:49,454 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:08:49,456 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:08:49,458 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:08:49,460 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:08:49,461 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:08:49,462 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:08:49,463 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:08:49,471 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 01:08:49,472 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 01:08:49,472 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 01:08:49,474 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 01:08:49,474 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 01:08:49,478 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 01:08:49,478 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 01:08:49,479 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 01:08:49,481 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 01:08:49,482 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 01:08:49,483 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 01:08:49,483 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 01:08:49,484 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 01:08:49,484 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 01:08:49,484 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:08:49,486 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:08:49,487 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:08:49,488 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 01:08:49,511 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:08:49,512 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:08:49,516 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:08:49,516 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:08:49,517 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:08:49,517 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:08:49,517 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:08:49,518 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:08:49,518 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:08:49,518 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:08:49,519 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:08:49,519 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:08:49,519 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:08:49,520 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:08:49,520 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:08:49,520 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:08:49,521 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:08:49,521 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:08:49,521 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:08:49,521 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:08:49,522 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:08:49,522 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:08:49,522 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:08:49,522 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:08:49,522 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:08:49,523 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:08:49,523 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:08:49,523 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:08:49,523 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 01:08:49,859 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:08:49,877 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:08:49,881 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:08:49,883 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:08:49,883 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:08:49,884 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec1_product24.cil.c [2019-10-15 01:08:49,950 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/62b24ffba/f01e7150d9ea4b8795e975e1a2996e24/FLAGf2dcd895a [2019-10-15 01:08:50,633 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:08:50,635 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec1_product24.cil.c [2019-10-15 01:08:50,661 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/62b24ffba/f01e7150d9ea4b8795e975e1a2996e24/FLAGf2dcd895a [2019-10-15 01:08:50,755 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/62b24ffba/f01e7150d9ea4b8795e975e1a2996e24 [2019-10-15 01:08:50,766 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:08:50,768 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:08:50,769 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:08:50,769 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:08:50,773 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:08:50,774 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:08:50" (1/1) ... [2019-10-15 01:08:50,777 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2df3183 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:50, skipping insertion in model container [2019-10-15 01:08:50,777 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:08:50" (1/1) ... [2019-10-15 01:08:50,785 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:08:50,875 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:08:51,621 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:08:51,649 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:08:51,804 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:08:51,867 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:08:51,868 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:51 WrapperNode [2019-10-15 01:08:51,868 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:08:51,869 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:08:51,869 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:08:51,869 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:08:51,884 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:51" (1/1) ... [2019-10-15 01:08:51,884 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:51" (1/1) ... [2019-10-15 01:08:51,919 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:51" (1/1) ... [2019-10-15 01:08:51,919 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:51" (1/1) ... [2019-10-15 01:08:51,988 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:51" (1/1) ... [2019-10-15 01:08:52,047 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:51" (1/1) ... [2019-10-15 01:08:52,074 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:51" (1/1) ... [2019-10-15 01:08:52,092 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:08:52,093 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:08:52,093 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:08:52,093 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:08:52,094 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:51" (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 01:08:52,171 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:08:52,172 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:08:52,172 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-15 01:08:52,172 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-15 01:08:52,172 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-15 01:08:52,173 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-15 01:08:52,173 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-15 01:08:52,173 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-15 01:08:52,173 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-15 01:08:52,174 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-15 01:08:52,174 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-10-15 01:08:52,174 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-10-15 01:08:52,174 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-10-15 01:08:52,175 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-10-15 01:08:52,175 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-10-15 01:08:52,175 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-10-15 01:08:52,175 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-10-15 01:08:52,176 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-10-15 01:08:52,176 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-15 01:08:52,177 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-10-15 01:08:52,177 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-10-15 01:08:52,178 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-10-15 01:08:52,178 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-15 01:08:52,178 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-10-15 01:08:52,178 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-15 01:08:52,179 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-15 01:08:52,179 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:08:52,179 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-10-15 01:08:52,179 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-10-15 01:08:52,179 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-10-15 01:08:52,179 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-10-15 01:08:52,180 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-10-15 01:08:52,180 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-10-15 01:08:52,180 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-10-15 01:08:52,180 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-10-15 01:08:52,180 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-10-15 01:08:52,181 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-10-15 01:08:52,181 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-10-15 01:08:52,181 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-10-15 01:08:52,181 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-10-15 01:08:52,182 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-10-15 01:08:52,182 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-10-15 01:08:52,182 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-10-15 01:08:52,182 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-10-15 01:08:52,182 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-10-15 01:08:52,183 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-10-15 01:08:52,183 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-10-15 01:08:52,183 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-10-15 01:08:52,183 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-10-15 01:08:52,183 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-10-15 01:08:52,183 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-10-15 01:08:52,184 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2019-10-15 01:08:52,184 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__twothirdsfull [2019-10-15 01:08:52,184 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-10-15 01:08:52,184 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-10-15 01:08:52,184 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-10-15 01:08:52,185 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__weight [2019-10-15 01:08:52,185 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2019-10-15 01:08:52,185 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-10-15 01:08:52,185 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-10-15 01:08:52,185 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-10-15 01:08:52,185 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2019-10-15 01:08:52,186 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-15 01:08:52,186 INFO L138 BoogieDeclarations]: Found implementation of procedure printState__wrappee__executivefloor [2019-10-15 01:08:52,186 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-10-15 01:08:52,187 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-10-15 01:08:52,187 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2019-10-15 01:08:52,187 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloor [2019-10-15 01:08:52,187 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-10-15 01:08:52,187 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-10-15 01:08:52,187 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2019-10-15 01:08:52,188 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__2 [2019-10-15 01:08:52,188 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__3 [2019-10-15 01:08:52,189 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__4 [2019-10-15 01:08:52,189 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-15 01:08:52,189 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-10-15 01:08:52,189 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-10-15 01:08:52,189 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-10-15 01:08:52,190 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-15 01:08:52,190 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-15 01:08:52,191 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-15 01:08:52,191 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-15 01:08:52,191 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:08:52,192 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:08:52,192 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-15 01:08:52,192 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-15 01:08:52,193 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-15 01:08:52,193 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-15 01:08:52,194 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-15 01:08:52,194 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-15 01:08:52,194 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:08:52,194 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-15 01:08:52,194 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-15 01:08:52,195 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:08:52,195 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-15 01:08:52,195 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-15 01:08:52,195 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:08:52,195 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-15 01:08:52,195 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-15 01:08:52,196 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:08:52,196 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-15 01:08:52,196 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-15 01:08:52,196 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:08:52,196 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-10-15 01:08:52,196 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-10-15 01:08:52,197 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-10-15 01:08:52,197 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-10-15 01:08:52,197 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-10-15 01:08:52,197 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-10-15 01:08:52,197 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-10-15 01:08:52,198 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-10-15 01:08:52,198 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-10-15 01:08:52,198 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-15 01:08:52,198 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-10-15 01:08:52,198 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-10-15 01:08:52,198 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-10-15 01:08:52,199 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-15 01:08:52,199 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-10-15 01:08:52,199 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-10-15 01:08:52,200 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-10-15 01:08:52,200 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-10-15 01:08:52,200 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-10-15 01:08:52,200 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-15 01:08:52,201 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-10-15 01:08:52,202 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-15 01:08:52,202 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2019-10-15 01:08:52,202 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__4 [2019-10-15 01:08:52,203 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-15 01:08:52,203 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-15 01:08:52,203 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-15 01:08:52,203 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-15 01:08:52,204 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-15 01:08:52,204 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:08:52,204 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-10-15 01:08:52,204 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-10-15 01:08:52,204 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-10-15 01:08:52,205 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-10-15 01:08:52,208 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-10-15 01:08:52,209 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-10-15 01:08:52,209 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-10-15 01:08:52,209 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__2 [2019-10-15 01:08:52,210 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-15 01:08:52,210 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-10-15 01:08:52,210 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-10-15 01:08:52,216 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-10-15 01:08:52,217 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-10-15 01:08:52,217 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-10-15 01:08:52,217 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-10-15 01:08:52,217 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-10-15 01:08:52,217 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-10-15 01:08:52,217 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-10-15 01:08:52,217 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2019-10-15 01:08:52,218 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloor [2019-10-15 01:08:52,218 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-10-15 01:08:52,218 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-10-15 01:08:52,218 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-10-15 01:08:52,219 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-10-15 01:08:52,219 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-10-15 01:08:52,219 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-10-15 01:08:52,219 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-10-15 01:08:52,219 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2019-10-15 01:08:52,219 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__twothirdsfull [2019-10-15 01:08:52,219 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-10-15 01:08:52,220 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-10-15 01:08:52,220 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__weight [2019-10-15 01:08:52,220 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2019-10-15 01:08:52,220 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-10-15 01:08:52,220 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-10-15 01:08:52,220 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-10-15 01:08:52,221 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2019-10-15 01:08:52,221 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__3 [2019-10-15 01:08:52,221 INFO L130 BoogieDeclarations]: Found specification of procedure printState__wrappee__executivefloor [2019-10-15 01:08:52,221 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-10-15 01:08:52,221 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-10-15 01:08:52,221 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-10-15 01:08:52,222 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-15 01:08:52,222 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:08:52,222 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-15 01:08:52,222 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:08:54,981 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:08:54,981 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-15 01:08:54,983 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:08:54 BoogieIcfgContainer [2019-10-15 01:08:54,983 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:08:54,985 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:08:54,985 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:08:54,988 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:08:54,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:08:50" (1/3) ... [2019-10-15 01:08:54,989 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f8056f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:08:54, skipping insertion in model container [2019-10-15 01:08:54,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:51" (2/3) ... [2019-10-15 01:08:54,990 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f8056f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:08:54, skipping insertion in model container [2019-10-15 01:08:54,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:08:54" (3/3) ... [2019-10-15 01:08:54,992 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product24.cil.c [2019-10-15 01:08:55,003 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:08:55,015 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:08:55,029 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:08:55,073 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:08:55,073 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:08:55,073 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:08:55,073 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:08:55,073 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:08:55,074 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:08:55,074 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:08:55,074 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:08:55,119 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states. [2019-10-15 01:08:55,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-10-15 01:08:55,149 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:55,151 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] [2019-10-15 01:08:55,154 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:55,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:55,163 INFO L82 PathProgramCache]: Analyzing trace with hash 2036682546, now seen corresponding path program 1 times [2019-10-15 01:08:55,174 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:55,175 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788434711] [2019-10-15 01:08:55,175 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:55,175 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:55,175 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:55,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:55,835 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:08:55,835 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788434711] [2019-10-15 01:08:55,836 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854383530] [2019-10-15 01:08:55,836 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 01:08:56,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:56,570 INFO L256 TraceCheckSpWp]: Trace formula consists of 3176 conjuncts, 1 conjunts are in the unsatisfiable core [2019-10-15 01:08:56,587 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:56,622 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:08:56,623 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:56,841 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:08:56,841 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:08:56,842 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [4] total 4 [2019-10-15 01:08:56,842 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770925386] [2019-10-15 01:08:56,850 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-15 01:08:56,852 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:56,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-15 01:08:56,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:08:56,871 INFO L87 Difference]: Start difference. First operand 818 states. Second operand 2 states. [2019-10-15 01:08:56,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:56,996 INFO L93 Difference]: Finished difference Result 694 states and 1094 transitions. [2019-10-15 01:08:56,997 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-15 01:08:56,998 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 116 [2019-10-15 01:08:56,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:57,026 INFO L225 Difference]: With dead ends: 694 [2019-10-15 01:08:57,027 INFO L226 Difference]: Without dead ends: 657 [2019-10-15 01:08:57,032 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:08:57,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2019-10-15 01:08:57,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 657. [2019-10-15 01:08:57,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 657 states. [2019-10-15 01:08:57,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 1039 transitions. [2019-10-15 01:08:57,148 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 1039 transitions. Word has length 116 [2019-10-15 01:08:57,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:57,150 INFO L462 AbstractCegarLoop]: Abstraction has 657 states and 1039 transitions. [2019-10-15 01:08:57,150 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-15 01:08:57,151 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 1039 transitions. [2019-10-15 01:08:57,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-10-15 01:08:57,155 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:57,155 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] [2019-10-15 01:08:57,364 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:57,365 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:57,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:57,366 INFO L82 PathProgramCache]: Analyzing trace with hash -778540699, now seen corresponding path program 1 times [2019-10-15 01:08:57,366 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:57,367 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992256925] [2019-10-15 01:08:57,367 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:57,367 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:57,368 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:57,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:57,611 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:08:57,612 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992256925] [2019-10-15 01:08:57,612 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231760389] [2019-10-15 01:08:57,612 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 01:08:58,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:58,218 INFO L256 TraceCheckSpWp]: Trace formula consists of 3179 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:08:58,228 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:58,274 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:08:58,276 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:58,520 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:08:58,521 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:08:58,521 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-15 01:08:58,522 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241677141] [2019-10-15 01:08:58,523 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:08:58,523 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:58,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:08:58,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:08:58,524 INFO L87 Difference]: Start difference. First operand 657 states and 1039 transitions. Second operand 4 states. [2019-10-15 01:08:58,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:58,629 INFO L93 Difference]: Finished difference Result 1286 states and 2051 transitions. [2019-10-15 01:08:58,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:08:58,629 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 118 [2019-10-15 01:08:58,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:58,637 INFO L225 Difference]: With dead ends: 1286 [2019-10-15 01:08:58,637 INFO L226 Difference]: Without dead ends: 657 [2019-10-15 01:08:58,643 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 232 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:08:58,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2019-10-15 01:08:58,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 657. [2019-10-15 01:08:58,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 657 states. [2019-10-15 01:08:58,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 1038 transitions. [2019-10-15 01:08:58,689 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 1038 transitions. Word has length 118 [2019-10-15 01:08:58,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:58,690 INFO L462 AbstractCegarLoop]: Abstraction has 657 states and 1038 transitions. [2019-10-15 01:08:58,690 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:08:58,691 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 1038 transitions. [2019-10-15 01:08:58,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-10-15 01:08:58,699 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:58,700 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] [2019-10-15 01:08:58,911 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:58,911 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:58,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:58,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1816210495, now seen corresponding path program 1 times [2019-10-15 01:08:58,912 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:58,912 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362007912] [2019-10-15 01:08:58,912 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:58,912 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:58,913 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:58,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:59,139 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:08:59,140 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362007912] [2019-10-15 01:08:59,140 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890148471] [2019-10-15 01:08:59,140 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 01:08:59,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:59,832 INFO L256 TraceCheckSpWp]: Trace formula consists of 3181 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:08:59,839 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:59,869 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:08:59,869 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:00,070 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:09:00,071 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:00,071 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-15 01:09:00,071 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89131000] [2019-10-15 01:09:00,072 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:00,073 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:00,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:00,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:09:00,073 INFO L87 Difference]: Start difference. First operand 657 states and 1038 transitions. Second operand 4 states. [2019-10-15 01:09:00,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:00,151 INFO L93 Difference]: Finished difference Result 1286 states and 2049 transitions. [2019-10-15 01:09:00,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:09:00,152 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 120 [2019-10-15 01:09:00,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:00,158 INFO L225 Difference]: With dead ends: 1286 [2019-10-15 01:09:00,158 INFO L226 Difference]: Without dead ends: 657 [2019-10-15 01:09:00,161 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 236 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:09:00,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2019-10-15 01:09:00,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 657. [2019-10-15 01:09:00,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 657 states. [2019-10-15 01:09:00,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 1037 transitions. [2019-10-15 01:09:00,236 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 1037 transitions. Word has length 120 [2019-10-15 01:09:00,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:00,236 INFO L462 AbstractCegarLoop]: Abstraction has 657 states and 1037 transitions. [2019-10-15 01:09:00,236 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:00,236 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 1037 transitions. [2019-10-15 01:09:00,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-10-15 01:09:00,239 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:00,239 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] [2019-10-15 01:09:00,446 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:00,446 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:00,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:00,447 INFO L82 PathProgramCache]: Analyzing trace with hash 920540717, now seen corresponding path program 1 times [2019-10-15 01:09:00,447 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:00,448 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582135148] [2019-10-15 01:09:00,448 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:00,448 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:00,448 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:00,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:00,578 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:09:00,578 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582135148] [2019-10-15 01:09:00,579 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898209209] [2019-10-15 01:09:00,579 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 01:09:01,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:01,150 INFO L256 TraceCheckSpWp]: Trace formula consists of 3183 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:01,157 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:01,189 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:09:01,189 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:01,514 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:09:01,515 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:01,515 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-15 01:09:01,515 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637084695] [2019-10-15 01:09:01,515 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:01,516 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:01,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:01,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:09:01,516 INFO L87 Difference]: Start difference. First operand 657 states and 1037 transitions. Second operand 4 states. [2019-10-15 01:09:01,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:01,608 INFO L93 Difference]: Finished difference Result 1293 states and 2056 transitions. [2019-10-15 01:09:01,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:09:01,609 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 122 [2019-10-15 01:09:01,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:01,615 INFO L225 Difference]: With dead ends: 1293 [2019-10-15 01:09:01,615 INFO L226 Difference]: Without dead ends: 666 [2019-10-15 01:09:01,618 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 240 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:09:01,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2019-10-15 01:09:01,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 666. [2019-10-15 01:09:01,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 666 states. [2019-10-15 01:09:01,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 1049 transitions. [2019-10-15 01:09:01,651 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 1049 transitions. Word has length 122 [2019-10-15 01:09:01,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:01,652 INFO L462 AbstractCegarLoop]: Abstraction has 666 states and 1049 transitions. [2019-10-15 01:09:01,652 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:01,652 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 1049 transitions. [2019-10-15 01:09:01,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-10-15 01:09:01,654 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:01,654 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] [2019-10-15 01:09:01,870 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:01,871 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:01,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:01,872 INFO L82 PathProgramCache]: Analyzing trace with hash 930906058, now seen corresponding path program 1 times [2019-10-15 01:09:01,873 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:01,873 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847555963] [2019-10-15 01:09:01,874 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:01,874 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:01,874 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:01,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:01,990 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:09:01,990 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847555963] [2019-10-15 01:09:01,990 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150988318] [2019-10-15 01:09:01,991 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 01:09:02,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:02,555 INFO L256 TraceCheckSpWp]: Trace formula consists of 3184 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:02,562 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:02,588 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:09:02,589 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:02,859 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:09:02,859 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:02,859 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-15 01:09:02,860 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410144972] [2019-10-15 01:09:02,860 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:02,860 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:02,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:02,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:09:02,861 INFO L87 Difference]: Start difference. First operand 666 states and 1049 transitions. Second operand 4 states. [2019-10-15 01:09:02,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:02,950 INFO L93 Difference]: Finished difference Result 1295 states and 2057 transitions. [2019-10-15 01:09:02,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:09:02,951 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 123 [2019-10-15 01:09:02,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:02,959 INFO L225 Difference]: With dead ends: 1295 [2019-10-15 01:09:02,959 INFO L226 Difference]: Without dead ends: 666 [2019-10-15 01:09:02,963 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 242 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:09:02,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2019-10-15 01:09:02,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 666. [2019-10-15 01:09:02,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 666 states. [2019-10-15 01:09:02,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 1048 transitions. [2019-10-15 01:09:02,994 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 1048 transitions. Word has length 123 [2019-10-15 01:09:02,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:02,995 INFO L462 AbstractCegarLoop]: Abstraction has 666 states and 1048 transitions. [2019-10-15 01:09:02,995 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:02,995 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 1048 transitions. [2019-10-15 01:09:02,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-10-15 01:09:02,998 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:02,999 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] [2019-10-15 01:09:03,212 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:03,212 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:03,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:03,213 INFO L82 PathProgramCache]: Analyzing trace with hash -289235503, now seen corresponding path program 1 times [2019-10-15 01:09:03,213 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:03,213 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793867393] [2019-10-15 01:09:03,213 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:03,213 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:03,214 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:03,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:03,317 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:09:03,318 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793867393] [2019-10-15 01:09:03,318 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527601202] [2019-10-15 01:09:03,318 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 01:09:03,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:03,911 INFO L256 TraceCheckSpWp]: Trace formula consists of 3185 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:03,923 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:03,956 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:09:03,956 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:04,222 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:09:04,223 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:04,223 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-15 01:09:04,223 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333080451] [2019-10-15 01:09:04,224 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:04,224 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:04,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:04,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:09:04,225 INFO L87 Difference]: Start difference. First operand 666 states and 1048 transitions. Second operand 4 states. [2019-10-15 01:09:04,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:04,299 INFO L93 Difference]: Finished difference Result 1295 states and 2056 transitions. [2019-10-15 01:09:04,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:09:04,300 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 124 [2019-10-15 01:09:04,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:04,306 INFO L225 Difference]: With dead ends: 1295 [2019-10-15 01:09:04,306 INFO L226 Difference]: Without dead ends: 666 [2019-10-15 01:09:04,309 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 244 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:09:04,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2019-10-15 01:09:04,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 666. [2019-10-15 01:09:04,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 666 states. [2019-10-15 01:09:04,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 1047 transitions. [2019-10-15 01:09:04,333 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 1047 transitions. Word has length 124 [2019-10-15 01:09:04,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:04,334 INFO L462 AbstractCegarLoop]: Abstraction has 666 states and 1047 transitions. [2019-10-15 01:09:04,334 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:04,334 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 1047 transitions. [2019-10-15 01:09:04,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-10-15 01:09:04,336 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:04,336 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] [2019-10-15 01:09:04,543 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:04,544 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:04,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:04,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1000385362, now seen corresponding path program 1 times [2019-10-15 01:09:04,544 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:04,545 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020533061] [2019-10-15 01:09:04,545 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:04,545 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:04,545 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:04,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:04,766 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 01:09:04,767 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020533061] [2019-10-15 01:09:04,767 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485781590] [2019-10-15 01:09:04,767 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 01:09:05,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:05,382 INFO L256 TraceCheckSpWp]: Trace formula consists of 3186 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:05,387 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:05,425 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:09:05,425 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:05,650 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:09:05,651 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:05,651 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-10-15 01:09:05,652 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671921197] [2019-10-15 01:09:05,653 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:05,654 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:05,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:05,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-10-15 01:09:05,656 INFO L87 Difference]: Start difference. First operand 666 states and 1047 transitions. Second operand 4 states. [2019-10-15 01:09:05,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:05,948 INFO L93 Difference]: Finished difference Result 1294 states and 2056 transitions. [2019-10-15 01:09:05,949 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:09:05,949 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 125 [2019-10-15 01:09:05,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:05,958 INFO L225 Difference]: With dead ends: 1294 [2019-10-15 01:09:05,958 INFO L226 Difference]: Without dead ends: 666 [2019-10-15 01:09:05,965 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 248 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-10-15 01:09:05,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2019-10-15 01:09:05,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 666. [2019-10-15 01:09:05,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 666 states. [2019-10-15 01:09:05,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 1042 transitions. [2019-10-15 01:09:05,999 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 1042 transitions. Word has length 125 [2019-10-15 01:09:05,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:05,999 INFO L462 AbstractCegarLoop]: Abstraction has 666 states and 1042 transitions. [2019-10-15 01:09:06,000 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:06,000 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 1042 transitions. [2019-10-15 01:09:06,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-10-15 01:09:06,003 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:06,003 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] [2019-10-15 01:09:06,216 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:06,216 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:06,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:06,217 INFO L82 PathProgramCache]: Analyzing trace with hash -494618178, now seen corresponding path program 1 times [2019-10-15 01:09:06,217 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:06,217 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295226431] [2019-10-15 01:09:06,217 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:06,218 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:06,218 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:06,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:06,413 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 01:09:06,414 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295226431] [2019-10-15 01:09:06,418 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127762505] [2019-10-15 01:09:06,418 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 01:09:07,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:07,061 INFO L256 TraceCheckSpWp]: Trace formula consists of 3188 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:07,065 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:07,108 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:09:07,108 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:07,320 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:09:07,321 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:07,321 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-10-15 01:09:07,321 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561357941] [2019-10-15 01:09:07,322 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:07,322 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:07,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:07,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-10-15 01:09:07,323 INFO L87 Difference]: Start difference. First operand 666 states and 1042 transitions. Second operand 4 states. [2019-10-15 01:09:07,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:07,477 INFO L93 Difference]: Finished difference Result 1294 states and 2046 transitions. [2019-10-15 01:09:07,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:09:07,478 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 127 [2019-10-15 01:09:07,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:07,483 INFO L225 Difference]: With dead ends: 1294 [2019-10-15 01:09:07,483 INFO L226 Difference]: Without dead ends: 666 [2019-10-15 01:09:07,487 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 252 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-10-15 01:09:07,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2019-10-15 01:09:07,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 666. [2019-10-15 01:09:07,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 666 states. [2019-10-15 01:09:07,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 1037 transitions. [2019-10-15 01:09:07,510 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 1037 transitions. Word has length 127 [2019-10-15 01:09:07,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:07,510 INFO L462 AbstractCegarLoop]: Abstraction has 666 states and 1037 transitions. [2019-10-15 01:09:07,511 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:07,511 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 1037 transitions. [2019-10-15 01:09:07,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-10-15 01:09:07,513 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:07,513 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] [2019-10-15 01:09:07,730 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:07,730 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:07,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:07,731 INFO L82 PathProgramCache]: Analyzing trace with hash -856773916, now seen corresponding path program 1 times [2019-10-15 01:09:07,731 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:07,731 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179743988] [2019-10-15 01:09:07,731 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:07,731 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:07,731 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:07,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:07,938 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 01:09:07,938 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179743988] [2019-10-15 01:09:07,939 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594880036] [2019-10-15 01:09:07,939 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 01:09:08,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:08,657 INFO L256 TraceCheckSpWp]: Trace formula consists of 3190 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:08,662 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:08,705 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:09:08,706 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:08,915 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:09:08,915 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:08,916 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-10-15 01:09:08,916 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035609396] [2019-10-15 01:09:08,916 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:08,916 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:08,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:08,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-10-15 01:09:08,917 INFO L87 Difference]: Start difference. First operand 666 states and 1037 transitions. Second operand 4 states. [2019-10-15 01:09:09,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:09,149 INFO L93 Difference]: Finished difference Result 1330 states and 2095 transitions. [2019-10-15 01:09:09,149 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:09:09,150 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 129 [2019-10-15 01:09:09,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:09,156 INFO L225 Difference]: With dead ends: 1330 [2019-10-15 01:09:09,156 INFO L226 Difference]: Without dead ends: 705 [2019-10-15 01:09:09,159 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 256 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-10-15 01:09:09,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2019-10-15 01:09:09,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 705. [2019-10-15 01:09:09,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 705 states. [2019-10-15 01:09:09,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 1101 transitions. [2019-10-15 01:09:09,187 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 1101 transitions. Word has length 129 [2019-10-15 01:09:09,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:09,188 INFO L462 AbstractCegarLoop]: Abstraction has 705 states and 1101 transitions. [2019-10-15 01:09:09,188 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:09,188 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 1101 transitions. [2019-10-15 01:09:09,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-10-15 01:09:09,190 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:09,190 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] [2019-10-15 01:09:09,398 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:09,399 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:09,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:09,399 INFO L82 PathProgramCache]: Analyzing trace with hash 165717697, now seen corresponding path program 1 times [2019-10-15 01:09:09,399 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:09,399 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768057012] [2019-10-15 01:09:09,400 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:09,400 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:09,400 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:09,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:09,553 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 01:09:09,554 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768057012] [2019-10-15 01:09:09,554 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965686914] [2019-10-15 01:09:09,554 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 01:09:10,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:10,269 INFO L256 TraceCheckSpWp]: Trace formula consists of 3191 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:10,273 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:10,306 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:09:10,306 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:10,512 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:09:10,513 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:10,513 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-10-15 01:09:10,513 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241631752] [2019-10-15 01:09:10,513 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:10,514 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:10,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:10,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-10-15 01:09:10,514 INFO L87 Difference]: Start difference. First operand 705 states and 1101 transitions. Second operand 4 states. [2019-10-15 01:09:10,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:10,697 INFO L93 Difference]: Finished difference Result 1333 states and 2098 transitions. [2019-10-15 01:09:10,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:09:10,698 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 130 [2019-10-15 01:09:10,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:10,703 INFO L225 Difference]: With dead ends: 1333 [2019-10-15 01:09:10,703 INFO L226 Difference]: Without dead ends: 705 [2019-10-15 01:09:10,706 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 258 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-10-15 01:09:10,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2019-10-15 01:09:10,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 705. [2019-10-15 01:09:10,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 705 states. [2019-10-15 01:09:10,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 1096 transitions. [2019-10-15 01:09:10,730 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 1096 transitions. Word has length 130 [2019-10-15 01:09:10,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:10,731 INFO L462 AbstractCegarLoop]: Abstraction has 705 states and 1096 transitions. [2019-10-15 01:09:10,731 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:10,731 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 1096 transitions. [2019-10-15 01:09:10,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-10-15 01:09:10,733 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:10,733 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] [2019-10-15 01:09:10,941 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:10,941 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:10,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:10,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1848911168, now seen corresponding path program 1 times [2019-10-15 01:09:10,943 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:10,943 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174381793] [2019-10-15 01:09:10,943 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:10,943 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:10,943 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:10,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:11,091 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 01:09:11,092 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174381793] [2019-10-15 01:09:11,092 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053773165] [2019-10-15 01:09:11,092 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 01:09:11,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:11,799 INFO L256 TraceCheckSpWp]: Trace formula consists of 3187 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-15 01:09:11,803 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:11,900 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:09:11,900 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:12,244 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:09:12,358 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:09:12,359 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:12,359 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 9] total 16 [2019-10-15 01:09:12,359 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856465146] [2019-10-15 01:09:12,360 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-15 01:09:12,360 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:12,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-15 01:09:12,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2019-10-15 01:09:12,361 INFO L87 Difference]: Start difference. First operand 705 states and 1096 transitions. Second operand 9 states. [2019-10-15 01:09:12,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:12,634 INFO L93 Difference]: Finished difference Result 1346 states and 2112 transitions. [2019-10-15 01:09:12,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-15 01:09:12,635 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 130 [2019-10-15 01:09:12,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:12,640 INFO L225 Difference]: With dead ends: 1346 [2019-10-15 01:09:12,640 INFO L226 Difference]: Without dead ends: 721 [2019-10-15 01:09:12,644 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 245 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2019-10-15 01:09:12,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2019-10-15 01:09:12,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 714. [2019-10-15 01:09:12,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 714 states. [2019-10-15 01:09:12,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 714 states to 714 states and 1109 transitions. [2019-10-15 01:09:12,670 INFO L78 Accepts]: Start accepts. Automaton has 714 states and 1109 transitions. Word has length 130 [2019-10-15 01:09:12,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:12,671 INFO L462 AbstractCegarLoop]: Abstraction has 714 states and 1109 transitions. [2019-10-15 01:09:12,671 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-15 01:09:12,671 INFO L276 IsEmpty]: Start isEmpty. Operand 714 states and 1109 transitions. [2019-10-15 01:09:12,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-10-15 01:09:12,673 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:12,673 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] [2019-10-15 01:09:12,882 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:12,882 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:12,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:12,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1039423711, now seen corresponding path program 1 times [2019-10-15 01:09:12,883 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:12,883 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807143778] [2019-10-15 01:09:12,884 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:12,884 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:12,884 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:12,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:13,015 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:09:13,016 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807143778] [2019-10-15 01:09:13,016 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589729534] [2019-10-15 01:09:13,016 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 01:09:13,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:13,676 INFO L256 TraceCheckSpWp]: Trace formula consists of 3186 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:09:13,680 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:13,734 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 01:09:13,734 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:14,039 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 01:09:14,040 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:09:14,040 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 13 [2019-10-15 01:09:14,040 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991115176] [2019-10-15 01:09:14,041 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-15 01:09:14,041 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:14,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-15 01:09:14,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2019-10-15 01:09:14,042 INFO L87 Difference]: Start difference. First operand 714 states and 1109 transitions. Second operand 11 states. [2019-10-15 01:09:14,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:14,173 INFO L93 Difference]: Finished difference Result 1284 states and 2014 transitions. [2019-10-15 01:09:14,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-15 01:09:14,174 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 130 [2019-10-15 01:09:14,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:14,178 INFO L225 Difference]: With dead ends: 1284 [2019-10-15 01:09:14,179 INFO L226 Difference]: Without dead ends: 731 [2019-10-15 01:09:14,182 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 251 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 01:09:14,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2019-10-15 01:09:14,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 721. [2019-10-15 01:09:14,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 721 states. [2019-10-15 01:09:14,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 1119 transitions. [2019-10-15 01:09:14,215 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 1119 transitions. Word has length 130 [2019-10-15 01:09:14,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:14,216 INFO L462 AbstractCegarLoop]: Abstraction has 721 states and 1119 transitions. [2019-10-15 01:09:14,216 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-15 01:09:14,216 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 1119 transitions. [2019-10-15 01:09:14,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-10-15 01:09:14,218 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:14,219 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] [2019-10-15 01:09:14,426 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:14,426 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:14,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:14,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1852331009, now seen corresponding path program 1 times [2019-10-15 01:09:14,427 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:14,428 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347281225] [2019-10-15 01:09:14,428 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:14,428 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:14,428 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:14,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:14,519 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 01:09:14,520 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347281225] [2019-10-15 01:09:14,520 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528441358] [2019-10-15 01:09:14,520 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 01:09:15,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:15,235 INFO L256 TraceCheckSpWp]: Trace formula consists of 3183 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-15 01:09:15,238 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:15,312 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:09:15,312 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:15,623 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:09:15,737 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:09:15,737 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:09:15,738 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [4] total 16 [2019-10-15 01:09:15,738 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103604753] [2019-10-15 01:09:15,738 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-15 01:09:15,739 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:15,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-15 01:09:15,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2019-10-15 01:09:15,739 INFO L87 Difference]: Start difference. First operand 721 states and 1119 transitions. Second operand 14 states. [2019-10-15 01:09:16,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:16,029 INFO L93 Difference]: Finished difference Result 1284 states and 2014 transitions. [2019-10-15 01:09:16,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-15 01:09:16,029 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 131 [2019-10-15 01:09:16,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:16,035 INFO L225 Difference]: With dead ends: 1284 [2019-10-15 01:09:16,035 INFO L226 Difference]: Without dead ends: 731 [2019-10-15 01:09:16,039 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 248 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2019-10-15 01:09:16,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2019-10-15 01:09:16,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 721. [2019-10-15 01:09:16,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 721 states. [2019-10-15 01:09:16,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 1119 transitions. [2019-10-15 01:09:16,066 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 1119 transitions. Word has length 131 [2019-10-15 01:09:16,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:16,067 INFO L462 AbstractCegarLoop]: Abstraction has 721 states and 1119 transitions. [2019-10-15 01:09:16,067 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-15 01:09:16,067 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 1119 transitions. [2019-10-15 01:09:16,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-10-15 01:09:16,069 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:16,070 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-15 01:09:16,278 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:16,279 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:16,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:16,279 INFO L82 PathProgramCache]: Analyzing trace with hash 741733821, now seen corresponding path program 1 times [2019-10-15 01:09:16,280 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:16,280 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902906049] [2019-10-15 01:09:16,280 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:16,281 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:16,281 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:16,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:16,372 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:09:16,372 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902906049] [2019-10-15 01:09:16,373 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077277213] [2019-10-15 01:09:16,373 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 01:09:16,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:17,004 INFO L256 TraceCheckSpWp]: Trace formula consists of 3189 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:17,007 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:17,031 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:09:17,031 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:17,236 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:09:17,236 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:17,236 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-15 01:09:17,237 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843075759] [2019-10-15 01:09:17,237 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:17,238 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:17,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:17,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:09:17,238 INFO L87 Difference]: Start difference. First operand 721 states and 1119 transitions. Second operand 4 states. [2019-10-15 01:09:17,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:17,527 INFO L93 Difference]: Finished difference Result 1361 states and 2135 transitions. [2019-10-15 01:09:17,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:09:17,527 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 133 [2019-10-15 01:09:17,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:17,532 INFO L225 Difference]: With dead ends: 1361 [2019-10-15 01:09:17,532 INFO L226 Difference]: Without dead ends: 721 [2019-10-15 01:09:17,536 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 262 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 01:09:17,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2019-10-15 01:09:17,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 721. [2019-10-15 01:09:17,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 721 states. [2019-10-15 01:09:17,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 1114 transitions. [2019-10-15 01:09:17,561 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 1114 transitions. Word has length 133 [2019-10-15 01:09:17,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:17,562 INFO L462 AbstractCegarLoop]: Abstraction has 721 states and 1114 transitions. [2019-10-15 01:09:17,562 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:17,562 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 1114 transitions. [2019-10-15 01:09:17,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-10-15 01:09:17,565 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:17,565 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] [2019-10-15 01:09:17,783 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:17,783 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:17,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:17,783 INFO L82 PathProgramCache]: Analyzing trace with hash -631538628, now seen corresponding path program 1 times [2019-10-15 01:09:17,783 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:17,784 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478566652] [2019-10-15 01:09:17,784 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:17,784 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:17,784 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:17,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:17,880 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 01:09:17,881 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478566652] [2019-10-15 01:09:17,881 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530930636] [2019-10-15 01:09:17,881 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 01:09:18,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:18,554 INFO L256 TraceCheckSpWp]: Trace formula consists of 3184 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-15 01:09:18,558 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:18,627 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:09:18,628 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:18,954 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:09:19,058 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:09:19,059 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:09:19,059 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [4] total 13 [2019-10-15 01:09:19,059 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891131723] [2019-10-15 01:09:19,060 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-15 01:09:19,060 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:19,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-15 01:09:19,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2019-10-15 01:09:19,060 INFO L87 Difference]: Start difference. First operand 721 states and 1114 transitions. Second operand 11 states. [2019-10-15 01:09:19,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:19,297 INFO L93 Difference]: Finished difference Result 1288 states and 2023 transitions. [2019-10-15 01:09:19,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-15 01:09:19,298 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 132 [2019-10-15 01:09:19,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:19,302 INFO L225 Difference]: With dead ends: 1288 [2019-10-15 01:09:19,303 INFO L226 Difference]: Without dead ends: 735 [2019-10-15 01:09:19,306 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 251 SyntacticMatches, 7 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2019-10-15 01:09:19,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2019-10-15 01:09:19,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 730. [2019-10-15 01:09:19,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 730 states. [2019-10-15 01:09:19,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 730 states to 730 states and 1131 transitions. [2019-10-15 01:09:19,332 INFO L78 Accepts]: Start accepts. Automaton has 730 states and 1131 transitions. Word has length 132 [2019-10-15 01:09:19,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:19,332 INFO L462 AbstractCegarLoop]: Abstraction has 730 states and 1131 transitions. [2019-10-15 01:09:19,333 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-15 01:09:19,333 INFO L276 IsEmpty]: Start isEmpty. Operand 730 states and 1131 transitions. [2019-10-15 01:09:19,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-10-15 01:09:19,335 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:19,335 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] [2019-10-15 01:09:19,544 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:19,544 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:19,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:19,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1231517626, now seen corresponding path program 1 times [2019-10-15 01:09:19,545 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:19,545 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584538563] [2019-10-15 01:09:19,546 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:19,546 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:19,546 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:19,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:19,641 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 01:09:19,641 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584538563] [2019-10-15 01:09:19,641 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744687157] [2019-10-15 01:09:19,642 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 01:09:20,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:20,507 INFO L256 TraceCheckSpWp]: Trace formula consists of 3185 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-15 01:09:20,511 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:20,552 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:09:20,553 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:20,772 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:09:20,843 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:09:20,843 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:09:20,843 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [4] total 11 [2019-10-15 01:09:20,843 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709177820] [2019-10-15 01:09:20,844 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-15 01:09:20,844 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:20,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-15 01:09:20,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2019-10-15 01:09:20,845 INFO L87 Difference]: Start difference. First operand 730 states and 1131 transitions. Second operand 9 states. [2019-10-15 01:09:20,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:20,974 INFO L93 Difference]: Finished difference Result 1386 states and 2191 transitions. [2019-10-15 01:09:20,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:09:20,974 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 133 [2019-10-15 01:09:20,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:20,979 INFO L225 Difference]: With dead ends: 1386 [2019-10-15 01:09:20,979 INFO L226 Difference]: Without dead ends: 739 [2019-10-15 01:09:20,983 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 260 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2019-10-15 01:09:20,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2019-10-15 01:09:21,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 737. [2019-10-15 01:09:21,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 737 states. [2019-10-15 01:09:21,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 1139 transitions. [2019-10-15 01:09:21,009 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 1139 transitions. Word has length 133 [2019-10-15 01:09:21,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:21,010 INFO L462 AbstractCegarLoop]: Abstraction has 737 states and 1139 transitions. [2019-10-15 01:09:21,010 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-15 01:09:21,010 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 1139 transitions. [2019-10-15 01:09:21,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-10-15 01:09:21,012 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:21,012 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] [2019-10-15 01:09:21,228 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:21,228 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:21,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:21,229 INFO L82 PathProgramCache]: Analyzing trace with hash -329564981, now seen corresponding path program 1 times [2019-10-15 01:09:21,229 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:21,230 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435409890] [2019-10-15 01:09:21,230 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:21,230 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:21,230 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:21,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:21,323 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 01:09:21,324 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435409890] [2019-10-15 01:09:21,324 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879034912] [2019-10-15 01:09:21,324 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 01:09:22,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:22,202 INFO L256 TraceCheckSpWp]: Trace formula consists of 3186 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-15 01:09:22,205 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:22,243 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:09:22,243 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:22,459 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:09:22,527 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:09:22,527 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:09:22,527 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [4] total 10 [2019-10-15 01:09:22,528 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319618934] [2019-10-15 01:09:22,528 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-15 01:09:22,529 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:22,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-15 01:09:22,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-10-15 01:09:22,530 INFO L87 Difference]: Start difference. First operand 737 states and 1139 transitions. Second operand 8 states. [2019-10-15 01:09:22,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:22,628 INFO L93 Difference]: Finished difference Result 1400 states and 2202 transitions. [2019-10-15 01:09:22,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-15 01:09:22,628 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 134 [2019-10-15 01:09:22,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:22,633 INFO L225 Difference]: With dead ends: 1400 [2019-10-15 01:09:22,633 INFO L226 Difference]: Without dead ends: 746 [2019-10-15 01:09:22,637 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 262 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2019-10-15 01:09:22,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2019-10-15 01:09:22,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 741. [2019-10-15 01:09:22,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 741 states. [2019-10-15 01:09:22,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 1145 transitions. [2019-10-15 01:09:22,661 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 1145 transitions. Word has length 134 [2019-10-15 01:09:22,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:22,662 INFO L462 AbstractCegarLoop]: Abstraction has 741 states and 1145 transitions. [2019-10-15 01:09:22,662 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-15 01:09:22,662 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 1145 transitions. [2019-10-15 01:09:22,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-10-15 01:09:22,664 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:22,664 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] [2019-10-15 01:09:22,873 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:22,873 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:22,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:22,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1798085965, now seen corresponding path program 1 times [2019-10-15 01:09:22,875 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:22,875 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721595885] [2019-10-15 01:09:22,875 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:22,875 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:22,876 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:22,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:22,968 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 01:09:22,969 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721595885] [2019-10-15 01:09:22,969 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384492160] [2019-10-15 01:09:22,969 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:23,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:23,867 INFO L256 TraceCheckSpWp]: Trace formula consists of 3184 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-15 01:09:23,870 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:23,964 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-15 01:09:23,965 INFO L321 TraceCheckSpWp]: Computing backward predicates...