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_productSimulator.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 21:10:19,110 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 21:10:19,113 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 21:10:19,131 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 21:10:19,132 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 21:10:19,133 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 21:10:19,134 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 21:10:19,136 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 21:10:19,148 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 21:10:19,149 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 21:10:19,150 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 21:10:19,152 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 21:10:19,152 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 21:10:19,156 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 21:10:19,158 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 21:10:19,160 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 21:10:19,161 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 21:10:19,164 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 21:10:19,166 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 21:10:19,172 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 21:10:19,176 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 21:10:19,177 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 21:10:19,180 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 21:10:19,181 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 21:10:19,185 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 21:10:19,185 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 21:10:19,185 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 21:10:19,187 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 21:10:19,189 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 21:10:19,190 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 21:10:19,190 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 21:10:19,191 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 21:10:19,192 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 21:10:19,192 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 21:10:19,193 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 21:10:19,193 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 21:10:19,194 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 21:10:19,194 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 21:10:19,194 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 21:10:19,195 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 21:10:19,196 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 21:10:19,197 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 [2019-10-13 21:10:19,210 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 21:10:19,211 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 21:10:19,212 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 21:10:19,212 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 21:10:19,212 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 21:10:19,213 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 21:10:19,213 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 21:10:19,213 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 21:10:19,213 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 21:10:19,213 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 21:10:19,214 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 21:10:19,214 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 21:10:19,214 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 21:10:19,214 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 21:10:19,214 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 21:10:19,215 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 21:10:19,215 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 21:10:19,215 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 21:10:19,215 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 21:10:19,215 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 21:10:19,216 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 21:10:19,216 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:10:19,216 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 21:10:19,216 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 21:10:19,216 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 21:10:19,217 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 21:10:19,217 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 21:10:19,217 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 21:10:19,217 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 [2019-10-13 21:10:19,484 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 21:10:19,497 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 21:10:19,502 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 21:10:19,504 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 21:10:19,505 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 21:10:19,505 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec1_productSimulator.cil.c [2019-10-13 21:10:19,587 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6683f93de/519b7ba2fa3b45f9aca71f83d5ecb044/FLAGe12e7a292 [2019-10-13 21:10:20,272 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 21:10:20,275 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec1_productSimulator.cil.c [2019-10-13 21:10:20,301 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6683f93de/519b7ba2fa3b45f9aca71f83d5ecb044/FLAGe12e7a292 [2019-10-13 21:10:20,515 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6683f93de/519b7ba2fa3b45f9aca71f83d5ecb044 [2019-10-13 21:10:20,525 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 21:10:20,527 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 21:10:20,528 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 21:10:20,528 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 21:10:20,531 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 21:10:20,531 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:10:20" (1/1) ... [2019-10-13 21:10:20,535 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27b1071 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:10:20, skipping insertion in model container [2019-10-13 21:10:20,535 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:10:20" (1/1) ... [2019-10-13 21:10:20,543 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 21:10:20,634 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 21:10:21,452 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:10:21,481 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 21:10:21,617 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:10:21,699 INFO L192 MainTranslator]: Completed translation [2019-10-13 21:10:21,699 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:10:21 WrapperNode [2019-10-13 21:10:21,699 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 21:10:21,700 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 21:10:21,700 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 21:10:21,701 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 21:10:21,715 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:10:21" (1/1) ... [2019-10-13 21:10:21,715 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:10:21" (1/1) ... [2019-10-13 21:10:21,765 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:10:21" (1/1) ... [2019-10-13 21:10:21,766 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:10:21" (1/1) ... [2019-10-13 21:10:21,841 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:10:21" (1/1) ... [2019-10-13 21:10:21,887 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:10:21" (1/1) ... [2019-10-13 21:10:21,899 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:10:21" (1/1) ... [2019-10-13 21:10:21,916 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 21:10:21,917 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 21:10:21,917 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 21:10:21,918 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 21:10:21,919 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:10:21" (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 [2019-10-13 21:10:21,993 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 21:10:21,993 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 21:10:21,994 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-13 21:10:21,994 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-13 21:10:21,994 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-13 21:10:21,994 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-13 21:10:21,994 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-13 21:10:21,995 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-13 21:10:21,995 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-13 21:10:21,995 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-13 21:10:21,995 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-13 21:10:21,995 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-13 21:10:21,996 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-13 21:10:21,996 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-13 21:10:21,996 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-13 21:10:21,996 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2019-10-13 21:10:21,996 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__2 [2019-10-13 21:10:21,997 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__3 [2019-10-13 21:10:21,997 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__4 [2019-10-13 21:10:21,998 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-10-13 21:10:21,998 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-10-13 21:10:21,998 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-10-13 21:10:21,999 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-10-13 21:10:21,999 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-10-13 21:10:21,999 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-10-13 21:10:21,999 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-10-13 21:10:21,999 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-10-13 21:10:22,000 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-10-13 21:10:22,000 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-10-13 21:10:22,000 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked__before__overloaded [2019-10-13 21:10:22,000 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked__role__overloaded [2019-10-13 21:10:22,000 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-10-13 21:10:22,001 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__before__weight [2019-10-13 21:10:22,001 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__role__weight [2019-10-13 21:10:22,001 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-10-13 21:10:22,001 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__before__weight [2019-10-13 21:10:22,002 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__role__weight [2019-10-13 21:10:22,002 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__before__empty [2019-10-13 21:10:22,002 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__role__empty [2019-10-13 21:10:22,002 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-10-13 21:10:22,002 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-10-13 21:10:22,002 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-10-13 21:10:22,002 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-10-13 21:10:22,003 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-10-13 21:10:22,003 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-10-13 21:10:22,003 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-10-13 21:10:22,003 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-10-13 21:10:22,003 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-10-13 21:10:22,003 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-10-13 21:10:22,003 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__before__twothirdsfull [2019-10-13 21:10:22,004 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__role__twothirdsfull [2019-10-13 21:10:22,004 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__before__executivefloor [2019-10-13 21:10:22,004 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__role__executivefloor [2019-10-13 21:10:22,004 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-10-13 21:10:22,004 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-10-13 21:10:22,004 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-10-13 21:10:22,004 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__before__twothirdsfull [2019-10-13 21:10:22,005 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__role__twothirdsfull [2019-10-13 21:10:22,005 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__before__executivefloor [2019-10-13 21:10:22,005 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__role__executivefloor [2019-10-13 21:10:22,005 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-10-13 21:10:22,005 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-10-13 21:10:22,006 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-10-13 21:10:22,006 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__before__overloaded [2019-10-13 21:10:22,006 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__role__overloaded [2019-10-13 21:10:22,006 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-13 21:10:22,006 INFO L138 BoogieDeclarations]: Found implementation of procedure printState__before__overloaded [2019-10-13 21:10:22,006 INFO L138 BoogieDeclarations]: Found implementation of procedure printState__role__overloaded [2019-10-13 21:10:22,007 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-10-13 21:10:22,007 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-10-13 21:10:22,007 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2019-10-13 21:10:22,007 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloor [2019-10-13 21:10:22,007 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-10-13 21:10:22,008 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-10-13 21:10:22,008 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-10-13 21:10:22,008 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-10-13 21:10:22,009 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-10-13 21:10:22,009 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-10-13 21:10:22,009 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-10-13 21:10:22,009 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-10-13 21:10:22,010 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-10-13 21:10:22,010 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-10-13 21:10:22,010 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-13 21:10:22,010 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-10-13 21:10:22,011 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-10-13 21:10:22,011 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-10-13 21:10:22,011 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-13 21:10:22,012 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-10-13 21:10:22,012 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-13 21:10:22,012 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-13 21:10:22,013 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 21:10:22,013 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-10-13 21:10:22,013 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-10-13 21:10:22,013 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-10-13 21:10:22,013 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 21:10:22,013 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 21:10:22,013 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-13 21:10:22,014 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-13 21:10:22,014 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-13 21:10:22,014 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-13 21:10:22,014 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-13 21:10:22,014 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-13 21:10:22,014 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-13 21:10:22,014 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-13 21:10:22,015 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-13 21:10:22,015 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-13 21:10:22,015 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 21:10:22,015 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-13 21:10:22,015 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-13 21:10:22,015 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 21:10:22,015 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-13 21:10:22,016 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-13 21:10:22,016 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 21:10:22,016 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-13 21:10:22,016 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-13 21:10:22,016 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 21:10:22,017 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-13 21:10:22,017 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-13 21:10:22,017 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-10-13 21:10:22,017 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-10-13 21:10:22,018 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-13 21:10:22,018 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-13 21:10:22,018 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-10-13 21:10:22,018 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-10-13 21:10:22,019 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2019-10-13 21:10:22,020 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__2 [2019-10-13 21:10:22,020 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__3 [2019-10-13 21:10:22,020 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__4 [2019-10-13 21:10:22,020 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-10-13 21:10:22,020 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-10-13 21:10:22,020 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-10-13 21:10:22,021 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-10-13 21:10:22,021 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-10-13 21:10:22,021 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-10-13 21:10:22,021 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-10-13 21:10:22,022 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-10-13 21:10:22,022 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-13 21:10:22,025 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-10-13 21:10:22,026 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-10-13 21:10:22,026 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-10-13 21:10:22,026 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-13 21:10:22,026 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-10-13 21:10:22,027 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-10-13 21:10:22,027 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-10-13 21:10:22,034 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-10-13 21:10:22,034 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-10-13 21:10:22,035 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-10-13 21:10:22,035 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-10-13 21:10:22,035 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-10-13 21:10:22,036 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2019-10-13 21:10:22,036 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloor [2019-10-13 21:10:22,036 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked__before__overloaded [2019-10-13 21:10:22,036 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked__role__overloaded [2019-10-13 21:10:22,037 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__before__weight [2019-10-13 21:10:22,038 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__role__weight [2019-10-13 21:10:22,040 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__before__weight [2019-10-13 21:10:22,040 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__role__weight [2019-10-13 21:10:22,040 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__before__empty [2019-10-13 21:10:22,041 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__role__empty [2019-10-13 21:10:22,041 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-10-13 21:10:22,042 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-10-13 21:10:22,047 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-10-13 21:10:22,047 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-10-13 21:10:22,048 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-10-13 21:10:22,049 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__before__twothirdsfull [2019-10-13 21:10:22,049 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__role__twothirdsfull [2019-10-13 21:10:22,049 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__before__executivefloor [2019-10-13 21:10:22,050 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__role__executivefloor [2019-10-13 21:10:22,050 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-10-13 21:10:22,050 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-10-13 21:10:22,051 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__before__twothirdsfull [2019-10-13 21:10:22,051 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__role__twothirdsfull [2019-10-13 21:10:22,051 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__before__executivefloor [2019-10-13 21:10:22,051 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__role__executivefloor [2019-10-13 21:10:22,051 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-10-13 21:10:22,052 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-10-13 21:10:22,052 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-10-13 21:10:22,052 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__before__overloaded [2019-10-13 21:10:22,052 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__role__overloaded [2019-10-13 21:10:22,052 INFO L130 BoogieDeclarations]: Found specification of procedure printState__before__overloaded [2019-10-13 21:10:22,052 INFO L130 BoogieDeclarations]: Found specification of procedure printState__role__overloaded [2019-10-13 21:10:22,053 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-10-13 21:10:22,053 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-10-13 21:10:22,053 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-10-13 21:10:22,053 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-10-13 21:10:22,053 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 21:10:22,054 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-10-13 21:10:22,054 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-10-13 21:10:22,054 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-10-13 21:10:22,054 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-10-13 21:10:22,054 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-10-13 21:10:22,055 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-10-13 21:10:22,055 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-10-13 21:10:22,055 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-10-13 21:10:22,055 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-10-13 21:10:22,056 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-13 21:10:22,056 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-10-13 21:10:22,057 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-13 21:10:22,058 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-13 21:10:22,058 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 21:10:22,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 21:10:22,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-13 21:10:22,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 21:10:24,535 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 21:10:24,535 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-13 21:10:24,537 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:10:24 BoogieIcfgContainer [2019-10-13 21:10:24,538 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 21:10:24,539 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 21:10:24,541 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 21:10:24,546 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 21:10:24,546 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:10:20" (1/3) ... [2019-10-13 21:10:24,547 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5039b154 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:10:24, skipping insertion in model container [2019-10-13 21:10:24,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:10:21" (2/3) ... [2019-10-13 21:10:24,548 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5039b154 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:10:24, skipping insertion in model container [2019-10-13 21:10:24,549 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:10:24" (3/3) ... [2019-10-13 21:10:24,551 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec1_productSimulator.cil.c [2019-10-13 21:10:24,564 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 21:10:24,574 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 21:10:24,586 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 21:10:24,629 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 21:10:24,629 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 21:10:24,630 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 21:10:24,630 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 21:10:24,630 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 21:10:24,630 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 21:10:24,630 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 21:10:24,630 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 21:10:24,722 INFO L276 IsEmpty]: Start isEmpty. Operand 927 states. [2019-10-13 21:10:24,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-10-13 21:10:24,753 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:24,755 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:24,758 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:24,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:24,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1052026056, now seen corresponding path program 1 times [2019-10-13 21:10:24,776 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:24,777 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768182095] [2019-10-13 21:10:24,777 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:24,777 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:24,778 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:25,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:25,492 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2019-10-13 21:10:25,492 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768182095] [2019-10-13 21:10:25,493 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:10:25,494 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 21:10:25,494 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68550515] [2019-10-13 21:10:25,500 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 21:10:25,502 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:25,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 21:10:25,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:10:25,522 INFO L87 Difference]: Start difference. First operand 927 states. Second operand 6 states. [2019-10-13 21:10:25,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:25,750 INFO L93 Difference]: Finished difference Result 1511 states and 2355 transitions. [2019-10-13 21:10:25,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 21:10:25,753 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 150 [2019-10-13 21:10:25,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:25,800 INFO L225 Difference]: With dead ends: 1511 [2019-10-13 21:10:25,801 INFO L226 Difference]: Without dead ends: 761 [2019-10-13 21:10:25,818 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:10:25,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2019-10-13 21:10:25,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 761. [2019-10-13 21:10:25,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 761 states. [2019-10-13 21:10:25,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 761 states to 761 states and 1174 transitions. [2019-10-13 21:10:25,980 INFO L78 Accepts]: Start accepts. Automaton has 761 states and 1174 transitions. Word has length 150 [2019-10-13 21:10:25,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:25,992 INFO L462 AbstractCegarLoop]: Abstraction has 761 states and 1174 transitions. [2019-10-13 21:10:25,993 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 21:10:25,993 INFO L276 IsEmpty]: Start isEmpty. Operand 761 states and 1174 transitions. [2019-10-13 21:10:26,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-10-13 21:10:26,005 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:26,005 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:26,008 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:26,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:26,009 INFO L82 PathProgramCache]: Analyzing trace with hash 716196849, now seen corresponding path program 1 times [2019-10-13 21:10:26,009 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:26,010 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429168781] [2019-10-13 21:10:26,010 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:26,010 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:26,012 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:26,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:26,378 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2019-10-13 21:10:26,379 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429168781] [2019-10-13 21:10:26,379 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806098110] [2019-10-13 21:10:26,379 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 [2019-10-13 21:10:27,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:27,165 INFO L256 TraceCheckSpWp]: Trace formula consists of 3583 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:27,195 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:27,294 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2019-10-13 21:10:27,295 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:27,622 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2019-10-13 21:10:27,622 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:10:27,623 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [4] total 6 [2019-10-13 21:10:27,623 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564766225] [2019-10-13 21:10:27,626 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:27,626 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:27,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:27,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:10:27,627 INFO L87 Difference]: Start difference. First operand 761 states and 1174 transitions. Second operand 4 states. [2019-10-13 21:10:28,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:28,990 INFO L93 Difference]: Finished difference Result 2099 states and 3273 transitions. [2019-10-13 21:10:28,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:10:28,990 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 153 [2019-10-13 21:10:28,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:29,011 INFO L225 Difference]: With dead ends: 2099 [2019-10-13 21:10:29,011 INFO L226 Difference]: Without dead ends: 1468 [2019-10-13 21:10:29,016 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 305 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:10:29,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1468 states. [2019-10-13 21:10:29,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1468 to 1455. [2019-10-13 21:10:29,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1455 states. [2019-10-13 21:10:29,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1455 states to 1455 states and 2261 transitions. [2019-10-13 21:10:29,134 INFO L78 Accepts]: Start accepts. Automaton has 1455 states and 2261 transitions. Word has length 153 [2019-10-13 21:10:29,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:29,135 INFO L462 AbstractCegarLoop]: Abstraction has 1455 states and 2261 transitions. [2019-10-13 21:10:29,135 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:29,136 INFO L276 IsEmpty]: Start isEmpty. Operand 1455 states and 2261 transitions. [2019-10-13 21:10:29,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-10-13 21:10:29,142 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:29,142 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:29,356 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:29,356 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:29,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:29,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1946856055, now seen corresponding path program 1 times [2019-10-13 21:10:29,357 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:29,358 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922630947] [2019-10-13 21:10:29,358 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:29,359 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:29,359 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:29,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:29,527 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2019-10-13 21:10:29,528 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922630947] [2019-10-13 21:10:29,528 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640683990] [2019-10-13 21:10:29,528 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 [2019-10-13 21:10:30,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:30,229 INFO L256 TraceCheckSpWp]: Trace formula consists of 3583 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:30,238 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:30,330 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-10-13 21:10:30,330 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:30,645 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2019-10-13 21:10:30,646 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:30,646 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:10:30,646 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320470445] [2019-10-13 21:10:30,647 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:30,647 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:30,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:30,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:10:30,648 INFO L87 Difference]: Start difference. First operand 1455 states and 2261 transitions. Second operand 4 states. [2019-10-13 21:10:30,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:30,811 INFO L93 Difference]: Finished difference Result 2843 states and 4450 transitions. [2019-10-13 21:10:30,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:10:30,812 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 154 [2019-10-13 21:10:30,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:30,840 INFO L225 Difference]: With dead ends: 2843 [2019-10-13 21:10:30,841 INFO L226 Difference]: Without dead ends: 1455 [2019-10-13 21:10:30,853 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 304 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:10:30,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1455 states. [2019-10-13 21:10:30,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1455 to 1455. [2019-10-13 21:10:30,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1455 states. [2019-10-13 21:10:30,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1455 states to 1455 states and 2259 transitions. [2019-10-13 21:10:30,943 INFO L78 Accepts]: Start accepts. Automaton has 1455 states and 2259 transitions. Word has length 154 [2019-10-13 21:10:30,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:30,945 INFO L462 AbstractCegarLoop]: Abstraction has 1455 states and 2259 transitions. [2019-10-13 21:10:30,945 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:30,945 INFO L276 IsEmpty]: Start isEmpty. Operand 1455 states and 2259 transitions. [2019-10-13 21:10:30,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-10-13 21:10:30,952 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:30,952 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:31,160 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:31,161 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:31,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:31,162 INFO L82 PathProgramCache]: Analyzing trace with hash 662613507, now seen corresponding path program 1 times [2019-10-13 21:10:31,163 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:31,163 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573136245] [2019-10-13 21:10:31,163 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:31,163 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:31,164 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:31,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:31,306 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2019-10-13 21:10:31,307 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573136245] [2019-10-13 21:10:31,307 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500338649] [2019-10-13 21:10:31,307 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 [2019-10-13 21:10:31,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:31,987 INFO L256 TraceCheckSpWp]: Trace formula consists of 3585 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:31,997 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:32,054 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-10-13 21:10:32,055 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:32,408 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2019-10-13 21:10:32,409 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:32,409 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:10:32,409 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993643887] [2019-10-13 21:10:32,410 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:32,410 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:32,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:32,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:10:32,411 INFO L87 Difference]: Start difference. First operand 1455 states and 2259 transitions. Second operand 4 states. [2019-10-13 21:10:32,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:32,527 INFO L93 Difference]: Finished difference Result 2843 states and 4446 transitions. [2019-10-13 21:10:32,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:10:32,527 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 156 [2019-10-13 21:10:32,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:32,542 INFO L225 Difference]: With dead ends: 2843 [2019-10-13 21:10:32,543 INFO L226 Difference]: Without dead ends: 1455 [2019-10-13 21:10:32,553 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 308 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:10:32,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1455 states. [2019-10-13 21:10:32,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1455 to 1455. [2019-10-13 21:10:32,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1455 states. [2019-10-13 21:10:32,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1455 states to 1455 states and 2257 transitions. [2019-10-13 21:10:32,640 INFO L78 Accepts]: Start accepts. Automaton has 1455 states and 2257 transitions. Word has length 156 [2019-10-13 21:10:32,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:32,641 INFO L462 AbstractCegarLoop]: Abstraction has 1455 states and 2257 transitions. [2019-10-13 21:10:32,641 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:32,641 INFO L276 IsEmpty]: Start isEmpty. Operand 1455 states and 2257 transitions. [2019-10-13 21:10:32,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2019-10-13 21:10:32,645 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:32,646 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:32,856 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:32,857 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:32,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:32,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1295948095, now seen corresponding path program 1 times [2019-10-13 21:10:32,857 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:32,858 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334624559] [2019-10-13 21:10:32,858 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:32,860 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:32,860 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:32,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:33,028 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2019-10-13 21:10:33,029 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334624559] [2019-10-13 21:10:33,029 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819069816] [2019-10-13 21:10:33,029 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 [2019-10-13 21:10:34,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:34,328 INFO L256 TraceCheckSpWp]: Trace formula consists of 3587 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:34,335 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:34,368 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-10-13 21:10:34,369 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:34,621 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2019-10-13 21:10:34,621 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:34,622 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:10:34,622 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154617972] [2019-10-13 21:10:34,623 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:34,623 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:34,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:34,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:10:34,624 INFO L87 Difference]: Start difference. First operand 1455 states and 2257 transitions. Second operand 4 states. [2019-10-13 21:10:34,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:34,762 INFO L93 Difference]: Finished difference Result 2857 states and 4460 transitions. [2019-10-13 21:10:34,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:10:34,762 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 158 [2019-10-13 21:10:34,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:34,775 INFO L225 Difference]: With dead ends: 2857 [2019-10-13 21:10:34,775 INFO L226 Difference]: Without dead ends: 1473 [2019-10-13 21:10:34,782 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 312 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:10:34,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1473 states. [2019-10-13 21:10:34,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1473 to 1473. [2019-10-13 21:10:34,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1473 states. [2019-10-13 21:10:34,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1473 states to 1473 states and 2281 transitions. [2019-10-13 21:10:34,866 INFO L78 Accepts]: Start accepts. Automaton has 1473 states and 2281 transitions. Word has length 158 [2019-10-13 21:10:34,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:34,866 INFO L462 AbstractCegarLoop]: Abstraction has 1473 states and 2281 transitions. [2019-10-13 21:10:34,866 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:34,867 INFO L276 IsEmpty]: Start isEmpty. Operand 1473 states and 2281 transitions. [2019-10-13 21:10:34,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-10-13 21:10:34,871 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:34,872 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:35,081 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:35,082 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:35,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:35,082 INFO L82 PathProgramCache]: Analyzing trace with hash 2004070236, now seen corresponding path program 1 times [2019-10-13 21:10:35,082 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:35,083 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888085230] [2019-10-13 21:10:35,083 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:35,083 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:35,083 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:35,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:35,236 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2019-10-13 21:10:35,236 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888085230] [2019-10-13 21:10:35,236 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627583997] [2019-10-13 21:10:35,237 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 [2019-10-13 21:10:35,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:35,930 INFO L256 TraceCheckSpWp]: Trace formula consists of 3588 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:35,945 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:36,040 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-10-13 21:10:36,041 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:36,267 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2019-10-13 21:10:36,267 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:36,268 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:10:36,268 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242650345] [2019-10-13 21:10:36,269 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:36,269 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:36,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:36,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:10:36,270 INFO L87 Difference]: Start difference. First operand 1473 states and 2281 transitions. Second operand 4 states. [2019-10-13 21:10:36,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:36,380 INFO L93 Difference]: Finished difference Result 2861 states and 4462 transitions. [2019-10-13 21:10:36,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:10:36,380 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 159 [2019-10-13 21:10:36,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:36,394 INFO L225 Difference]: With dead ends: 2861 [2019-10-13 21:10:36,395 INFO L226 Difference]: Without dead ends: 1473 [2019-10-13 21:10:36,403 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 314 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:10:36,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1473 states. [2019-10-13 21:10:36,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1473 to 1473. [2019-10-13 21:10:36,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1473 states. [2019-10-13 21:10:36,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1473 states to 1473 states and 2279 transitions. [2019-10-13 21:10:36,460 INFO L78 Accepts]: Start accepts. Automaton has 1473 states and 2279 transitions. Word has length 159 [2019-10-13 21:10:36,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:36,460 INFO L462 AbstractCegarLoop]: Abstraction has 1473 states and 2279 transitions. [2019-10-13 21:10:36,460 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:36,460 INFO L276 IsEmpty]: Start isEmpty. Operand 1473 states and 2279 transitions. [2019-10-13 21:10:36,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2019-10-13 21:10:36,465 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:36,465 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:36,673 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:36,674 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:36,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:36,674 INFO L82 PathProgramCache]: Analyzing trace with hash 714002147, now seen corresponding path program 1 times [2019-10-13 21:10:36,675 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:36,675 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662997244] [2019-10-13 21:10:36,675 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:36,675 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:36,675 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:36,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:36,843 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2019-10-13 21:10:36,843 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662997244] [2019-10-13 21:10:36,844 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395327542] [2019-10-13 21:10:36,844 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-10-13 21:10:37,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:37,503 INFO L256 TraceCheckSpWp]: Trace formula consists of 3589 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:37,512 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:37,542 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-10-13 21:10:37,542 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:37,814 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2019-10-13 21:10:37,815 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:37,815 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-13 21:10:37,815 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709576835] [2019-10-13 21:10:37,816 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:37,816 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:37,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:37,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:10:37,817 INFO L87 Difference]: Start difference. First operand 1473 states and 2279 transitions. Second operand 4 states. [2019-10-13 21:10:37,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:37,931 INFO L93 Difference]: Finished difference Result 2861 states and 4460 transitions. [2019-10-13 21:10:37,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:10:37,931 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 160 [2019-10-13 21:10:37,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:37,944 INFO L225 Difference]: With dead ends: 2861 [2019-10-13 21:10:37,944 INFO L226 Difference]: Without dead ends: 1473 [2019-10-13 21:10:37,954 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 316 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:10:37,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1473 states. [2019-10-13 21:10:38,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1473 to 1473. [2019-10-13 21:10:38,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1473 states. [2019-10-13 21:10:38,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1473 states to 1473 states and 2277 transitions. [2019-10-13 21:10:38,016 INFO L78 Accepts]: Start accepts. Automaton has 1473 states and 2277 transitions. Word has length 160 [2019-10-13 21:10:38,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:38,017 INFO L462 AbstractCegarLoop]: Abstraction has 1473 states and 2277 transitions. [2019-10-13 21:10:38,017 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:38,017 INFO L276 IsEmpty]: Start isEmpty. Operand 1473 states and 2277 transitions. [2019-10-13 21:10:38,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-10-13 21:10:38,021 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:38,021 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:38,238 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:38,239 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:38,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:38,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1904546368, now seen corresponding path program 1 times [2019-10-13 21:10:38,240 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:38,240 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619382356] [2019-10-13 21:10:38,241 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:38,241 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:38,241 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:38,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:38,425 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2019-10-13 21:10:38,426 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619382356] [2019-10-13 21:10:38,427 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058467753] [2019-10-13 21:10:38,427 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 [2019-10-13 21:10:39,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:39,258 INFO L256 TraceCheckSpWp]: Trace formula consists of 3590 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 21:10:39,266 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:39,389 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-13 21:10:39,389 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:39,809 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2019-10-13 21:10:39,814 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:39,815 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9, 7] total 15 [2019-10-13 21:10:39,815 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127378826] [2019-10-13 21:10:39,816 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 21:10:39,816 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:39,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 21:10:39,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2019-10-13 21:10:39,817 INFO L87 Difference]: Start difference. First operand 1473 states and 2277 transitions. Second operand 7 states. [2019-10-13 21:10:40,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:40,019 INFO L93 Difference]: Finished difference Result 2875 states and 4478 transitions. [2019-10-13 21:10:40,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:10:40,020 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 161 [2019-10-13 21:10:40,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:40,034 INFO L225 Difference]: With dead ends: 2875 [2019-10-13 21:10:40,035 INFO L226 Difference]: Without dead ends: 1495 [2019-10-13 21:10:40,044 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 314 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2019-10-13 21:10:40,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1495 states. [2019-10-13 21:10:40,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1495 to 1487. [2019-10-13 21:10:40,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1487 states. [2019-10-13 21:10:40,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1487 states to 1487 states and 2297 transitions. [2019-10-13 21:10:40,207 INFO L78 Accepts]: Start accepts. Automaton has 1487 states and 2297 transitions. Word has length 161 [2019-10-13 21:10:40,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:40,207 INFO L462 AbstractCegarLoop]: Abstraction has 1487 states and 2297 transitions. [2019-10-13 21:10:40,208 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 21:10:40,208 INFO L276 IsEmpty]: Start isEmpty. Operand 1487 states and 2297 transitions. [2019-10-13 21:10:40,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-10-13 21:10:40,215 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:40,215 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:40,434 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:40,434 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:40,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:40,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1892339421, now seen corresponding path program 1 times [2019-10-13 21:10:40,435 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:40,435 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16253919] [2019-10-13 21:10:40,435 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:40,436 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:40,436 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:40,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:40,585 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-10-13 21:10:40,586 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16253919] [2019-10-13 21:10:40,586 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849750697] [2019-10-13 21:10:40,586 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 [2019-10-13 21:10:41,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:41,278 INFO L256 TraceCheckSpWp]: Trace formula consists of 3590 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 21:10:41,284 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:41,333 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-13 21:10:41,333 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:41,765 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2019-10-13 21:10:41,765 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:41,766 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4, 7] total 10 [2019-10-13 21:10:41,766 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986320206] [2019-10-13 21:10:41,771 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 21:10:41,771 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:41,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 21:10:41,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-10-13 21:10:41,772 INFO L87 Difference]: Start difference. First operand 1487 states and 2297 transitions. Second operand 7 states. [2019-10-13 21:10:42,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:42,002 INFO L93 Difference]: Finished difference Result 2887 states and 4496 transitions. [2019-10-13 21:10:42,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:10:42,003 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 162 [2019-10-13 21:10:42,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:42,026 INFO L225 Difference]: With dead ends: 2887 [2019-10-13 21:10:42,027 INFO L226 Difference]: Without dead ends: 1501 [2019-10-13 21:10:42,037 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 314 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:10:42,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1501 states. [2019-10-13 21:10:42,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1501 to 1493. [2019-10-13 21:10:42,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1493 states. [2019-10-13 21:10:42,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1493 states to 1493 states and 2307 transitions. [2019-10-13 21:10:42,134 INFO L78 Accepts]: Start accepts. Automaton has 1493 states and 2307 transitions. Word has length 162 [2019-10-13 21:10:42,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:42,137 INFO L462 AbstractCegarLoop]: Abstraction has 1493 states and 2307 transitions. [2019-10-13 21:10:42,137 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 21:10:42,137 INFO L276 IsEmpty]: Start isEmpty. Operand 1493 states and 2307 transitions. [2019-10-13 21:10:42,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-10-13 21:10:42,145 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:42,146 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:42,367 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:42,367 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:42,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:42,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1462791873, now seen corresponding path program 1 times [2019-10-13 21:10:42,368 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:42,369 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839733102] [2019-10-13 21:10:42,369 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:42,369 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:42,370 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:42,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:42,578 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2019-10-13 21:10:42,579 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839733102] [2019-10-13 21:10:42,579 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624414169] [2019-10-13 21:10:42,579 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-10-13 21:10:43,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:43,375 INFO L256 TraceCheckSpWp]: Trace formula consists of 3589 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:43,383 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:43,416 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-13 21:10:43,416 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:43,631 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2019-10-13 21:10:43,631 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:43,632 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:10:43,632 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863882722] [2019-10-13 21:10:43,633 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:43,633 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:43,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:43,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:10:43,634 INFO L87 Difference]: Start difference. First operand 1493 states and 2307 transitions. Second operand 4 states. [2019-10-13 21:10:43,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:43,837 INFO L93 Difference]: Finished difference Result 2897 states and 4516 transitions. [2019-10-13 21:10:43,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:10:43,838 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 161 [2019-10-13 21:10:43,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:43,851 INFO L225 Difference]: With dead ends: 2897 [2019-10-13 21:10:43,852 INFO L226 Difference]: Without dead ends: 1493 [2019-10-13 21:10:43,860 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 318 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:10:43,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1493 states. [2019-10-13 21:10:43,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1493 to 1493. [2019-10-13 21:10:43,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1493 states. [2019-10-13 21:10:43,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1493 states to 1493 states and 2297 transitions. [2019-10-13 21:10:43,915 INFO L78 Accepts]: Start accepts. Automaton has 1493 states and 2297 transitions. Word has length 161 [2019-10-13 21:10:43,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:43,916 INFO L462 AbstractCegarLoop]: Abstraction has 1493 states and 2297 transitions. [2019-10-13 21:10:43,916 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:43,916 INFO L276 IsEmpty]: Start isEmpty. Operand 1493 states and 2297 transitions. [2019-10-13 21:10:43,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-10-13 21:10:43,921 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:43,921 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:44,139 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:44,139 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:44,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:44,140 INFO L82 PathProgramCache]: Analyzing trace with hash -804498471, now seen corresponding path program 1 times [2019-10-13 21:10:44,140 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:44,140 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111760534] [2019-10-13 21:10:44,140 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:44,141 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:44,141 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:44,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:44,263 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2019-10-13 21:10:44,263 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111760534] [2019-10-13 21:10:44,264 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893373598] [2019-10-13 21:10:44,264 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 [2019-10-13 21:10:44,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:44,981 INFO L256 TraceCheckSpWp]: Trace formula consists of 3591 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:44,988 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:45,046 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-13 21:10:45,047 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:45,341 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2019-10-13 21:10:45,342 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:45,342 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:10:45,342 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893040845] [2019-10-13 21:10:45,343 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:45,343 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:45,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:45,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:10:45,344 INFO L87 Difference]: Start difference. First operand 1493 states and 2297 transitions. Second operand 4 states. [2019-10-13 21:10:45,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:45,541 INFO L93 Difference]: Finished difference Result 2897 states and 4496 transitions. [2019-10-13 21:10:45,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:10:45,542 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 163 [2019-10-13 21:10:45,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:45,556 INFO L225 Difference]: With dead ends: 2897 [2019-10-13 21:10:45,557 INFO L226 Difference]: Without dead ends: 1493 [2019-10-13 21:10:45,564 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 322 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:10:45,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1493 states. [2019-10-13 21:10:45,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1493 to 1493. [2019-10-13 21:10:45,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1493 states. [2019-10-13 21:10:45,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1493 states to 1493 states and 2287 transitions. [2019-10-13 21:10:45,623 INFO L78 Accepts]: Start accepts. Automaton has 1493 states and 2287 transitions. Word has length 163 [2019-10-13 21:10:45,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:45,623 INFO L462 AbstractCegarLoop]: Abstraction has 1493 states and 2287 transitions. [2019-10-13 21:10:45,623 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:45,623 INFO L276 IsEmpty]: Start isEmpty. Operand 1493 states and 2287 transitions. [2019-10-13 21:10:45,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2019-10-13 21:10:45,628 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:45,628 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:45,837 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:45,837 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:45,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:45,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1158081271, now seen corresponding path program 1 times [2019-10-13 21:10:45,839 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:45,839 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354704495] [2019-10-13 21:10:45,839 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:45,839 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:45,840 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:45,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:45,982 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-10-13 21:10:45,983 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354704495] [2019-10-13 21:10:45,983 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360662187] [2019-10-13 21:10:45,983 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 [2019-10-13 21:10:46,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:46,679 INFO L256 TraceCheckSpWp]: Trace formula consists of 3593 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:46,688 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:46,714 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-13 21:10:46,714 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:46,981 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2019-10-13 21:10:46,982 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:46,982 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:10:46,983 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377263150] [2019-10-13 21:10:46,984 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:46,984 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:46,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:46,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:10:46,985 INFO L87 Difference]: Start difference. First operand 1493 states and 2287 transitions. Second operand 4 states. [2019-10-13 21:10:47,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:47,267 INFO L93 Difference]: Finished difference Result 2975 states and 4598 transitions. [2019-10-13 21:10:47,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:10:47,268 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 165 [2019-10-13 21:10:47,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:47,286 INFO L225 Difference]: With dead ends: 2975 [2019-10-13 21:10:47,286 INFO L226 Difference]: Without dead ends: 1583 [2019-10-13 21:10:47,295 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 326 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:10:47,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1583 states. [2019-10-13 21:10:47,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1583 to 1571. [2019-10-13 21:10:47,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1571 states. [2019-10-13 21:10:47,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1571 states to 1571 states and 2411 transitions. [2019-10-13 21:10:47,384 INFO L78 Accepts]: Start accepts. Automaton has 1571 states and 2411 transitions. Word has length 165 [2019-10-13 21:10:47,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:47,385 INFO L462 AbstractCegarLoop]: Abstraction has 1571 states and 2411 transitions. [2019-10-13 21:10:47,385 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:47,385 INFO L276 IsEmpty]: Start isEmpty. Operand 1571 states and 2411 transitions. [2019-10-13 21:10:47,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-10-13 21:10:47,391 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:47,391 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:47,603 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:47,603 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:47,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:47,603 INFO L82 PathProgramCache]: Analyzing trace with hash 463508756, now seen corresponding path program 1 times [2019-10-13 21:10:47,604 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:47,604 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732194936] [2019-10-13 21:10:47,604 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:47,604 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:47,604 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:47,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:47,742 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-10-13 21:10:47,742 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732194936] [2019-10-13 21:10:47,742 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949249273] [2019-10-13 21:10:47,743 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 [2019-10-13 21:10:48,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:48,660 INFO L256 TraceCheckSpWp]: Trace formula consists of 3594 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:48,666 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:48,696 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-13 21:10:48,696 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:48,905 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2019-10-13 21:10:48,906 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:48,906 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:10:48,906 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858556956] [2019-10-13 21:10:48,906 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:48,907 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:48,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:48,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:10:48,907 INFO L87 Difference]: Start difference. First operand 1571 states and 2411 transitions. Second operand 4 states. [2019-10-13 21:10:49,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:49,113 INFO L93 Difference]: Finished difference Result 2963 states and 4578 transitions. [2019-10-13 21:10:49,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:10:49,113 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 166 [2019-10-13 21:10:49,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:49,124 INFO L225 Difference]: With dead ends: 2963 [2019-10-13 21:10:49,125 INFO L226 Difference]: Without dead ends: 1571 [2019-10-13 21:10:49,132 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 328 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:10:49,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1571 states. [2019-10-13 21:10:49,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1571 to 1571. [2019-10-13 21:10:49,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1571 states. [2019-10-13 21:10:49,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1571 states to 1571 states and 2401 transitions. [2019-10-13 21:10:49,200 INFO L78 Accepts]: Start accepts. Automaton has 1571 states and 2401 transitions. Word has length 166 [2019-10-13 21:10:49,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:49,202 INFO L462 AbstractCegarLoop]: Abstraction has 1571 states and 2401 transitions. [2019-10-13 21:10:49,202 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:49,202 INFO L276 IsEmpty]: Start isEmpty. Operand 1571 states and 2401 transitions. [2019-10-13 21:10:49,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2019-10-13 21:10:49,211 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:49,212 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:49,420 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:49,421 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:49,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:49,422 INFO L82 PathProgramCache]: Analyzing trace with hash 67346674, now seen corresponding path program 1 times [2019-10-13 21:10:49,422 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:49,422 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127409224] [2019-10-13 21:10:49,422 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:49,423 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:49,423 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:49,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:49,605 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-10-13 21:10:49,606 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127409224] [2019-10-13 21:10:49,606 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228573673] [2019-10-13 21:10:49,606 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 [2019-10-13 21:10:50,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:50,333 INFO L256 TraceCheckSpWp]: Trace formula consists of 3595 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:50,339 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:50,369 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-13 21:10:50,369 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:50,604 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2019-10-13 21:10:50,604 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:50,605 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-13 21:10:50,605 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085355648] [2019-10-13 21:10:50,605 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:50,606 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:50,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:50,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:10:50,606 INFO L87 Difference]: Start difference. First operand 1571 states and 2401 transitions. Second operand 4 states. [2019-10-13 21:10:50,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:50,824 INFO L93 Difference]: Finished difference Result 2963 states and 4568 transitions. [2019-10-13 21:10:50,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:10:50,825 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 167 [2019-10-13 21:10:50,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:50,841 INFO L225 Difference]: With dead ends: 2963 [2019-10-13 21:10:50,841 INFO L226 Difference]: Without dead ends: 1571 [2019-10-13 21:10:50,849 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 330 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:10:50,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1571 states. [2019-10-13 21:10:50,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1571 to 1571. [2019-10-13 21:10:50,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1571 states. [2019-10-13 21:10:50,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1571 states to 1571 states and 2391 transitions. [2019-10-13 21:10:50,936 INFO L78 Accepts]: Start accepts. Automaton has 1571 states and 2391 transitions. Word has length 167 [2019-10-13 21:10:50,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:50,936 INFO L462 AbstractCegarLoop]: Abstraction has 1571 states and 2391 transitions. [2019-10-13 21:10:50,936 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:50,937 INFO L276 IsEmpty]: Start isEmpty. Operand 1571 states and 2391 transitions. [2019-10-13 21:10:50,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2019-10-13 21:10:50,943 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:50,944 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:51,152 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:51,153 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:51,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:51,154 INFO L82 PathProgramCache]: Analyzing trace with hash -662720275, now seen corresponding path program 1 times [2019-10-13 21:10:51,154 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:51,154 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248244734] [2019-10-13 21:10:51,155 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:51,155 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:51,155 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:51,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:51,356 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-10-13 21:10:51,356 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248244734] [2019-10-13 21:10:51,356 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788185588] [2019-10-13 21:10:51,356 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