/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/product-lines/elevator_spec14_productSimulator.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 06:12:46,881 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 06:12:46,882 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 06:12:46,903 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 06:12:46,903 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 06:12:46,904 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 06:12:46,905 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 06:12:46,906 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 06:12:46,907 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 06:12:46,908 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 06:12:46,909 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 06:12:46,909 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 06:12:46,910 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 06:12:46,910 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 06:12:46,911 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 06:12:46,912 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 06:12:46,912 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 06:12:46,913 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 06:12:46,914 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 06:12:46,959 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 06:12:46,961 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 06:12:46,963 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 06:12:46,964 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 06:12:46,965 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 06:12:46,966 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-10 06:12:46,966 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-10 06:12:46,967 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-10 06:12:46,967 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-10 06:12:46,967 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-10 06:12:46,968 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2022-01-10 06:12:46,971 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 06:12:46,972 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 06:12:46,972 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 06:12:46,988 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf [2022-01-10 06:12:47,002 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 06:12:47,002 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 06:12:47,002 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 06:12:47,002 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 06:12:47,003 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 06:12:47,003 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 06:12:47,007 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 06:12:47,008 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 06:12:47,008 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 06:12:47,008 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 06:12:47,008 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 06:12:47,008 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 06:12:47,008 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 06:12:47,008 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 06:12:47,008 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 06:12:47,009 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 06:12:47,009 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 06:12:47,009 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 06:12:47,009 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 06:12:47,009 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 06:12:47,009 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 06:12:47,009 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 06:12:47,009 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 06:12:47,009 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:12:47,009 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 06:12:47,009 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 06:12:47,009 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 06:12:47,010 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 06:12:47,010 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 06:12:47,010 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 06:12:47,010 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 06:12:47,010 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 06:12:47,010 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 06:12:47,010 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 06:12:47,210 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 06:12:47,238 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 06:12:47,240 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 06:12:47,241 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 06:12:47,241 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 06:12:47,242 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec14_productSimulator.cil.c [2022-01-10 06:12:47,305 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b5cecb2d/c88c8b494b6e4eb78d77ccbec4994879/FLAGe0568348c [2022-01-10 06:12:47,743 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 06:12:47,743 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec14_productSimulator.cil.c [2022-01-10 06:12:47,781 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b5cecb2d/c88c8b494b6e4eb78d77ccbec4994879/FLAGe0568348c [2022-01-10 06:12:47,794 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b5cecb2d/c88c8b494b6e4eb78d77ccbec4994879 [2022-01-10 06:12:47,796 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 06:12:47,806 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 06:12:47,810 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 06:12:47,810 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 06:12:47,812 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 06:12:47,813 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:12:47" (1/1) ... [2022-01-10 06:12:47,814 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fdfd1ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:12:47, skipping insertion in model container [2022-01-10 06:12:47,814 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:12:47" (1/1) ... [2022-01-10 06:12:47,819 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 06:12:47,862 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 06:12:48,345 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec14_productSimulator.cil.c[77005,77018] [2022-01-10 06:12:48,347 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:12:48,360 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-01-10 06:12:48,372 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 06:12:48,430 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec14_productSimulator.cil.c[77005,77018] [2022-01-10 06:12:48,431 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:12:48,434 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 06:12:48,480 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec14_productSimulator.cil.c[77005,77018] [2022-01-10 06:12:48,480 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:12:48,499 INFO L208 MainTranslator]: Completed translation [2022-01-10 06:12:48,500 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:12:48 WrapperNode [2022-01-10 06:12:48,500 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 06:12:48,500 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 06:12:48,501 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 06:12:48,501 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 06:12:48,505 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:12:48" (1/1) ... [2022-01-10 06:12:48,540 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:12:48" (1/1) ... [2022-01-10 06:12:48,592 INFO L137 Inliner]: procedures = 109, calls = 375, calls flagged for inlining = 33, calls inlined = 29, statements flattened = 952 [2022-01-10 06:12:48,592 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 06:12:48,593 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 06:12:48,593 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 06:12:48,593 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 06:12:48,604 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:12:48" (1/1) ... [2022-01-10 06:12:48,604 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:12:48" (1/1) ... [2022-01-10 06:12:48,621 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:12:48" (1/1) ... [2022-01-10 06:12:48,621 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:12:48" (1/1) ... [2022-01-10 06:12:48,656 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:12:48" (1/1) ... [2022-01-10 06:12:48,665 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:12:48" (1/1) ... [2022-01-10 06:12:48,692 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:12:48" (1/1) ... [2022-01-10 06:12:48,699 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 06:12:48,700 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 06:12:48,700 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 06:12:48,700 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 06:12:48,701 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:12:48" (1/1) ... [2022-01-10 06:12:48,708 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:12:48,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 06:12:48,733 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-10 06:12:48,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-10 06:12:48,764 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-01-10 06:12:48,764 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-01-10 06:12:48,764 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-01-10 06:12:48,764 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-01-10 06:12:48,764 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-01-10 06:12:48,765 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-01-10 06:12:48,765 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__before__twothirdsfull [2022-01-10 06:12:48,765 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__before__twothirdsfull [2022-01-10 06:12:48,765 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-01-10 06:12:48,765 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-01-10 06:12:48,765 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__before__empty [2022-01-10 06:12:48,765 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__before__empty [2022-01-10 06:12:48,765 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-01-10 06:12:48,765 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-01-10 06:12:48,765 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-01-10 06:12:48,765 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-01-10 06:12:48,765 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-01-10 06:12:48,766 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-01-10 06:12:48,766 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification14_spec__1 [2022-01-10 06:12:48,766 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification14_spec__1 [2022-01-10 06:12:48,766 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__before__weight [2022-01-10 06:12:48,766 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__before__weight [2022-01-10 06:12:48,766 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-01-10 06:12:48,766 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-01-10 06:12:48,766 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-01-10 06:12:48,766 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-01-10 06:12:48,766 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-01-10 06:12:48,766 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-01-10 06:12:48,766 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 06:12:48,766 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-01-10 06:12:48,766 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-01-10 06:12:48,767 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-01-10 06:12:48,767 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-01-10 06:12:48,767 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-01-10 06:12:48,767 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-01-10 06:12:48,767 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-01-10 06:12:48,767 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-01-10 06:12:48,767 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__before__overloaded [2022-01-10 06:12:48,770 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__before__overloaded [2022-01-10 06:12:48,770 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-01-10 06:12:48,770 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-01-10 06:12:48,770 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-01-10 06:12:48,770 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-01-10 06:12:48,770 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-01-10 06:12:48,770 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-01-10 06:12:48,771 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__before__weight [2022-01-10 06:12:48,771 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__before__weight [2022-01-10 06:12:48,771 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__before__executivefloor [2022-01-10 06:12:48,771 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__before__executivefloor [2022-01-10 06:12:48,771 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 06:12:48,771 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-01-10 06:12:48,771 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-01-10 06:12:48,772 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__before__executivefloor [2022-01-10 06:12:48,772 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__before__executivefloor [2022-01-10 06:12:48,772 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-01-10 06:12:48,772 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-01-10 06:12:48,772 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-01-10 06:12:48,773 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-01-10 06:12:48,773 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-01-10 06:12:48,773 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-01-10 06:12:48,773 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-01-10 06:12:48,774 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-01-10 06:12:48,774 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2022-01-10 06:12:48,774 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2022-01-10 06:12:48,774 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-01-10 06:12:48,775 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-01-10 06:12:48,775 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__before__twothirdsfull [2022-01-10 06:12:48,775 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__before__twothirdsfull [2022-01-10 06:12:48,783 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 06:12:48,783 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 06:12:48,783 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-01-10 06:12:48,783 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-01-10 06:12:48,912 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 06:12:48,914 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 06:12:49,868 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 06:12:49,881 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 06:12:49,881 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-10 06:12:49,884 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:12:49 BoogieIcfgContainer [2022-01-10 06:12:49,884 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 06:12:49,885 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 06:12:49,885 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 06:12:49,888 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 06:12:49,888 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 06:12:47" (1/3) ... [2022-01-10 06:12:49,888 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@535cbcf2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:12:49, skipping insertion in model container [2022-01-10 06:12:49,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:12:48" (2/3) ... [2022-01-10 06:12:49,889 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@535cbcf2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:12:49, skipping insertion in model container [2022-01-10 06:12:49,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:12:49" (3/3) ... [2022-01-10 06:12:49,890 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec14_productSimulator.cil.c [2022-01-10 06:12:49,893 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 06:12:49,894 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 06:12:49,936 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 06:12:49,941 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-10 06:12:49,941 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 06:12:49,975 INFO L276 IsEmpty]: Start isEmpty. Operand has 651 states, 492 states have (on average 1.6321138211382114) internal successors, (803), 514 states have internal predecessors, (803), 123 states have call successors, (123), 34 states have call predecessors, (123), 34 states have return successors, (123), 119 states have call predecessors, (123), 123 states have call successors, (123) [2022-01-10 06:12:49,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-01-10 06:12:49,993 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:12:49,993 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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] [2022-01-10 06:12:49,994 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:12:49,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:12:49,998 INFO L85 PathProgramCache]: Analyzing trace with hash 490189906, now seen corresponding path program 1 times [2022-01-10 06:12:50,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:12:50,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2028461936] [2022-01-10 06:12:50,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:12:50,009 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:12:50,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:12:50,023 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:12:50,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-01-10 06:12:50,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:12:50,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 613 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 06:12:50,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:12:50,560 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-01-10 06:12:50,560 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:12:50,561 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:12:50,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2028461936] [2022-01-10 06:12:50,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2028461936] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:12:50,563 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:12:50,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:12:50,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459968263] [2022-01-10 06:12:50,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:12:50,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:12:50,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:12:50,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:12:50,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:12:50,597 INFO L87 Difference]: Start difference. First operand has 651 states, 492 states have (on average 1.6321138211382114) internal successors, (803), 514 states have internal predecessors, (803), 123 states have call successors, (123), 34 states have call predecessors, (123), 34 states have return successors, (123), 119 states have call predecessors, (123), 123 states have call successors, (123) Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-01-10 06:12:50,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:12:50,754 INFO L93 Difference]: Finished difference Result 1287 states and 2080 transitions. [2022-01-10 06:12:50,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 06:12:50,756 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 93 [2022-01-10 06:12:50,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:12:50,767 INFO L225 Difference]: With dead ends: 1287 [2022-01-10 06:12:50,768 INFO L226 Difference]: Without dead ends: 642 [2022-01-10 06:12:50,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:12:50,776 INFO L933 BasicCegarLoop]: 1042 mSDtfsCounter, 18 mSDsluCounter, 3121 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 4163 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:12:50,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 4163 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:12:50,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2022-01-10 06:12:50,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 642. [2022-01-10 06:12:50,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 642 states, 485 states have (on average 1.620618556701031) internal successors, (786), 506 states have internal predecessors, (786), 123 states have call successors, (123), 34 states have call predecessors, (123), 33 states have return successors, (122), 118 states have call predecessors, (122), 122 states have call successors, (122) [2022-01-10 06:12:50,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 1031 transitions. [2022-01-10 06:12:50,832 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 1031 transitions. Word has length 93 [2022-01-10 06:12:50,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:12:50,833 INFO L470 AbstractCegarLoop]: Abstraction has 642 states and 1031 transitions. [2022-01-10 06:12:50,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-01-10 06:12:50,834 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 1031 transitions. [2022-01-10 06:12:50,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-01-10 06:12:50,837 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:12:50,837 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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] [2022-01-10 06:12:50,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-01-10 06:12:51,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:12:51,048 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:12:51,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:12:51,049 INFO L85 PathProgramCache]: Analyzing trace with hash 2135051856, now seen corresponding path program 1 times [2022-01-10 06:12:51,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:12:51,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [13661047] [2022-01-10 06:12:51,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:12:51,050 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:12:51,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:12:51,056 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:12:51,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-01-10 06:12:51,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:12:51,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 614 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:12:51,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:12:51,431 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-01-10 06:12:51,431 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:12:51,431 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:12:51,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [13661047] [2022-01-10 06:12:51,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [13661047] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:12:51,432 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:12:51,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:12:51,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920323753] [2022-01-10 06:12:51,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:12:51,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:12:51,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:12:51,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:12:51,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:12:51,440 INFO L87 Difference]: Start difference. First operand 642 states and 1031 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-01-10 06:12:51,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:12:51,502 INFO L93 Difference]: Finished difference Result 1259 states and 2033 transitions. [2022-01-10 06:12:51,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:12:51,503 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 94 [2022-01-10 06:12:51,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:12:51,508 INFO L225 Difference]: With dead ends: 1259 [2022-01-10 06:12:51,508 INFO L226 Difference]: Without dead ends: 646 [2022-01-10 06:12:51,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:12:51,511 INFO L933 BasicCegarLoop]: 1017 mSDtfsCounter, 15 mSDsluCounter, 2027 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 3044 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:12:51,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 3044 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:12:51,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2022-01-10 06:12:51,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 646. [2022-01-10 06:12:51,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 488 states have (on average 1.6168032786885247) internal successors, (789), 509 states have internal predecessors, (789), 123 states have call successors, (123), 35 states have call predecessors, (123), 34 states have return successors, (122), 118 states have call predecessors, (122), 122 states have call successors, (122) [2022-01-10 06:12:51,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 1034 transitions. [2022-01-10 06:12:51,550 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 1034 transitions. Word has length 94 [2022-01-10 06:12:51,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:12:51,551 INFO L470 AbstractCegarLoop]: Abstraction has 646 states and 1034 transitions. [2022-01-10 06:12:51,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-01-10 06:12:51,551 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 1034 transitions. [2022-01-10 06:12:51,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-01-10 06:12:51,555 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:12:51,555 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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] [2022-01-10 06:12:51,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-01-10 06:12:51,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:12:51,766 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:12:51,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:12:51,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1741664601, now seen corresponding path program 1 times [2022-01-10 06:12:51,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:12:51,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [724184352] [2022-01-10 06:12:51,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:12:51,768 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:12:51,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:12:51,769 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:12:51,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-01-10 06:12:51,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:12:51,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 615 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:12:51,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:12:52,125 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-01-10 06:12:52,125 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:12:52,125 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:12:52,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [724184352] [2022-01-10 06:12:52,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [724184352] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:12:52,125 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:12:52,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:12:52,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771164493] [2022-01-10 06:12:52,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:12:52,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:12:52,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:12:52,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:12:52,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:12:52,127 INFO L87 Difference]: Start difference. First operand 646 states and 1034 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-01-10 06:12:52,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:12:52,172 INFO L93 Difference]: Finished difference Result 1256 states and 2020 transitions. [2022-01-10 06:12:52,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:12:52,172 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 95 [2022-01-10 06:12:52,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:12:52,176 INFO L225 Difference]: With dead ends: 1256 [2022-01-10 06:12:52,176 INFO L226 Difference]: Without dead ends: 646 [2022-01-10 06:12:52,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:12:52,178 INFO L933 BasicCegarLoop]: 1018 mSDtfsCounter, 12 mSDsluCounter, 2027 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 3045 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:12:52,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 3045 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:12:52,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2022-01-10 06:12:52,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 646. [2022-01-10 06:12:52,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 488 states have (on average 1.6147540983606556) internal successors, (788), 509 states have internal predecessors, (788), 123 states have call successors, (123), 35 states have call predecessors, (123), 34 states have return successors, (122), 118 states have call predecessors, (122), 122 states have call successors, (122) [2022-01-10 06:12:52,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 1033 transitions. [2022-01-10 06:12:52,223 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 1033 transitions. Word has length 95 [2022-01-10 06:12:52,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:12:52,224 INFO L470 AbstractCegarLoop]: Abstraction has 646 states and 1033 transitions. [2022-01-10 06:12:52,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-01-10 06:12:52,224 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 1033 transitions. [2022-01-10 06:12:52,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-01-10 06:12:52,225 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:12:52,226 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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] [2022-01-10 06:12:52,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-01-10 06:12:52,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:12:52,436 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:12:52,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:12:52,436 INFO L85 PathProgramCache]: Analyzing trace with hash 91247532, now seen corresponding path program 1 times [2022-01-10 06:12:52,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:12:52,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [455328240] [2022-01-10 06:12:52,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:12:52,437 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:12:52,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:12:52,438 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:12:52,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-01-10 06:12:52,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:12:52,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 616 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:12:52,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:12:52,790 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-01-10 06:12:52,791 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:12:52,791 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:12:52,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [455328240] [2022-01-10 06:12:52,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [455328240] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:12:52,791 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:12:52,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:12:52,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427506834] [2022-01-10 06:12:52,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:12:52,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:12:52,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:12:52,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:12:52,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:12:52,792 INFO L87 Difference]: Start difference. First operand 646 states and 1033 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-01-10 06:12:52,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:12:52,833 INFO L93 Difference]: Finished difference Result 1256 states and 2019 transitions. [2022-01-10 06:12:52,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:12:52,834 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 96 [2022-01-10 06:12:52,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:12:52,836 INFO L225 Difference]: With dead ends: 1256 [2022-01-10 06:12:52,836 INFO L226 Difference]: Without dead ends: 646 [2022-01-10 06:12:52,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:12:52,839 INFO L933 BasicCegarLoop]: 1018 mSDtfsCounter, 10 mSDsluCounter, 2027 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 3045 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:12:52,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 3045 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:12:52,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2022-01-10 06:12:52,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 646. [2022-01-10 06:12:52,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 488 states have (on average 1.6127049180327868) internal successors, (787), 509 states have internal predecessors, (787), 123 states have call successors, (123), 35 states have call predecessors, (123), 34 states have return successors, (122), 118 states have call predecessors, (122), 122 states have call successors, (122) [2022-01-10 06:12:52,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 1032 transitions. [2022-01-10 06:12:52,853 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 1032 transitions. Word has length 96 [2022-01-10 06:12:52,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:12:52,853 INFO L470 AbstractCegarLoop]: Abstraction has 646 states and 1032 transitions. [2022-01-10 06:12:52,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-01-10 06:12:52,854 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 1032 transitions. [2022-01-10 06:12:52,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-01-10 06:12:52,855 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:12:52,855 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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] [2022-01-10 06:12:52,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-01-10 06:12:53,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:12:53,065 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:12:53,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:12:53,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1465980477, now seen corresponding path program 1 times [2022-01-10 06:12:53,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:12:53,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1389912557] [2022-01-10 06:12:53,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:12:53,066 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:12:53,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:12:53,067 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:12:53,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-01-10 06:12:53,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:12:53,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:12:53,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:12:53,390 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-01-10 06:12:53,391 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:12:53,391 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:12:53,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1389912557] [2022-01-10 06:12:53,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1389912557] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:12:53,391 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:12:53,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:12:53,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931446186] [2022-01-10 06:12:53,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:12:53,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:12:53,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:12:53,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:12:53,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:12:53,392 INFO L87 Difference]: Start difference. First operand 646 states and 1032 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-01-10 06:12:53,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:12:53,431 INFO L93 Difference]: Finished difference Result 1256 states and 2018 transitions. [2022-01-10 06:12:53,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:12:53,431 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 97 [2022-01-10 06:12:53,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:12:53,434 INFO L225 Difference]: With dead ends: 1256 [2022-01-10 06:12:53,435 INFO L226 Difference]: Without dead ends: 646 [2022-01-10 06:12:53,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:12:53,437 INFO L933 BasicCegarLoop]: 1018 mSDtfsCounter, 8 mSDsluCounter, 2027 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 3045 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:12:53,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 3045 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:12:53,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2022-01-10 06:12:53,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 646. [2022-01-10 06:12:53,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 488 states have (on average 1.610655737704918) internal successors, (786), 509 states have internal predecessors, (786), 123 states have call successors, (123), 35 states have call predecessors, (123), 34 states have return successors, (122), 118 states have call predecessors, (122), 122 states have call successors, (122) [2022-01-10 06:12:53,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 1031 transitions. [2022-01-10 06:12:53,452 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 1031 transitions. Word has length 97 [2022-01-10 06:12:53,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:12:53,452 INFO L470 AbstractCegarLoop]: Abstraction has 646 states and 1031 transitions. [2022-01-10 06:12:53,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-01-10 06:12:53,452 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 1031 transitions. [2022-01-10 06:12:53,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-01-10 06:12:53,453 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:12:53,453 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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] [2022-01-10 06:12:53,463 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-01-10 06:12:53,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:12:53,663 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:12:53,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:12:53,664 INFO L85 PathProgramCache]: Analyzing trace with hash -743370488, now seen corresponding path program 1 times [2022-01-10 06:12:53,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:12:53,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1527142356] [2022-01-10 06:12:53,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:12:53,665 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:12:53,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:12:53,666 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:12:53,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-01-10 06:12:53,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:12:53,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 618 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:12:53,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:12:53,981 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-01-10 06:12:53,981 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:12:53,982 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:12:53,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1527142356] [2022-01-10 06:12:53,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1527142356] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:12:53,982 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:12:53,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:12:53,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747521157] [2022-01-10 06:12:53,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:12:53,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:12:53,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:12:53,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:12:53,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:12:53,983 INFO L87 Difference]: Start difference. First operand 646 states and 1031 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-01-10 06:12:54,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:12:54,030 INFO L93 Difference]: Finished difference Result 1256 states and 2017 transitions. [2022-01-10 06:12:54,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:12:54,030 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 98 [2022-01-10 06:12:54,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:12:54,033 INFO L225 Difference]: With dead ends: 1256 [2022-01-10 06:12:54,033 INFO L226 Difference]: Without dead ends: 646 [2022-01-10 06:12:54,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:12:54,036 INFO L933 BasicCegarLoop]: 1018 mSDtfsCounter, 6 mSDsluCounter, 2027 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 3045 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:12:54,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 3045 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:12:54,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2022-01-10 06:12:54,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 646. [2022-01-10 06:12:54,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 488 states have (on average 1.6086065573770492) internal successors, (785), 509 states have internal predecessors, (785), 123 states have call successors, (123), 35 states have call predecessors, (123), 34 states have return successors, (122), 118 states have call predecessors, (122), 122 states have call successors, (122) [2022-01-10 06:12:54,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 1030 transitions. [2022-01-10 06:12:54,083 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 1030 transitions. Word has length 98 [2022-01-10 06:12:54,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:12:54,083 INFO L470 AbstractCegarLoop]: Abstraction has 646 states and 1030 transitions. [2022-01-10 06:12:54,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-01-10 06:12:54,083 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 1030 transitions. [2022-01-10 06:12:54,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-01-10 06:12:54,084 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:12:54,084 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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] [2022-01-10 06:12:54,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-01-10 06:12:54,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:12:54,295 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:12:54,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:12:54,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1934740703, now seen corresponding path program 1 times [2022-01-10 06:12:54,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:12:54,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1632981213] [2022-01-10 06:12:54,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:12:54,296 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:12:54,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:12:54,300 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:12:54,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-01-10 06:12:54,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:12:54,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 06:12:54,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:12:54,862 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-01-10 06:12:54,862 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:12:54,863 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:12:54,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1632981213] [2022-01-10 06:12:54,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1632981213] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:12:54,863 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:12:54,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 06:12:54,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196060122] [2022-01-10 06:12:54,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:12:54,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 06:12:54,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:12:54,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 06:12:54,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:12:54,865 INFO L87 Difference]: Start difference. First operand 646 states and 1030 transitions. Second operand has 7 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 3 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-01-10 06:12:55,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:12:55,049 INFO L93 Difference]: Finished difference Result 1267 states and 2034 transitions. [2022-01-10 06:12:55,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:12:55,051 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 3 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 99 [2022-01-10 06:12:55,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:12:55,068 INFO L225 Difference]: With dead ends: 1267 [2022-01-10 06:12:55,068 INFO L226 Difference]: Without dead ends: 661 [2022-01-10 06:12:55,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:12:55,072 INFO L933 BasicCegarLoop]: 1016 mSDtfsCounter, 117 mSDsluCounter, 4984 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 6000 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:12:55,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 6000 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:12:55,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2022-01-10 06:12:55,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 659. [2022-01-10 06:12:55,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 498 states have (on average 1.606425702811245) internal successors, (800), 521 states have internal predecessors, (800), 124 states have call successors, (124), 35 states have call predecessors, (124), 36 states have return successors, (126), 119 states have call predecessors, (126), 123 states have call successors, (126) [2022-01-10 06:12:55,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 1050 transitions. [2022-01-10 06:12:55,091 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 1050 transitions. Word has length 99 [2022-01-10 06:12:55,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:12:55,091 INFO L470 AbstractCegarLoop]: Abstraction has 659 states and 1050 transitions. [2022-01-10 06:12:55,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 3 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-01-10 06:12:55,092 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 1050 transitions. [2022-01-10 06:12:55,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-01-10 06:12:55,092 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:12:55,093 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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] [2022-01-10 06:12:55,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-01-10 06:12:55,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:12:55,318 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:12:55,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:12:55,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1922217090, now seen corresponding path program 1 times [2022-01-10 06:12:55,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:12:55,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1927756684] [2022-01-10 06:12:55,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:12:55,319 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:12:55,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:12:55,323 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:12:55,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-01-10 06:12:55,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:12:55,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:12:55,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:12:55,636 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-01-10 06:12:55,637 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:12:55,637 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:12:55,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1927756684] [2022-01-10 06:12:55,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1927756684] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:12:55,637 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:12:55,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:12:55,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844269352] [2022-01-10 06:12:55,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:12:55,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:12:55,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:12:55,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:12:55,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:12:55,638 INFO L87 Difference]: Start difference. First operand 659 states and 1050 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-01-10 06:12:55,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:12:55,675 INFO L93 Difference]: Finished difference Result 1274 states and 2045 transitions. [2022-01-10 06:12:55,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:12:55,676 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 99 [2022-01-10 06:12:55,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:12:55,679 INFO L225 Difference]: With dead ends: 1274 [2022-01-10 06:12:55,679 INFO L226 Difference]: Without dead ends: 655 [2022-01-10 06:12:55,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:12:55,684 INFO L933 BasicCegarLoop]: 1017 mSDtfsCounter, 6 mSDsluCounter, 2027 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 3044 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:12:55,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 3044 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:12:55,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2022-01-10 06:12:55,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 655. [2022-01-10 06:12:55,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 496 states have (on average 1.6068548387096775) internal successors, (797), 518 states have internal predecessors, (797), 123 states have call successors, (123), 35 states have call predecessors, (123), 35 states have return successors, (123), 118 states have call predecessors, (123), 122 states have call successors, (123) [2022-01-10 06:12:55,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 1043 transitions. [2022-01-10 06:12:55,702 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 1043 transitions. Word has length 99 [2022-01-10 06:12:55,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:12:55,702 INFO L470 AbstractCegarLoop]: Abstraction has 655 states and 1043 transitions. [2022-01-10 06:12:55,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-01-10 06:12:55,702 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 1043 transitions. [2022-01-10 06:12:55,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-01-10 06:12:55,703 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:12:55,703 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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] [2022-01-10 06:12:55,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-01-10 06:12:55,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:12:55,914 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:12:55,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:12:55,914 INFO L85 PathProgramCache]: Analyzing trace with hash -2024613944, now seen corresponding path program 1 times [2022-01-10 06:12:55,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:12:55,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1814876062] [2022-01-10 06:12:55,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:12:55,915 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:12:55,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:12:55,916 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:12:55,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-01-10 06:12:56,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:12:56,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 620 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:12:56,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:12:56,267 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-01-10 06:12:56,267 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:12:56,267 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:12:56,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1814876062] [2022-01-10 06:12:56,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1814876062] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:12:56,267 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:12:56,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:12:56,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787157926] [2022-01-10 06:12:56,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:12:56,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:12:56,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:12:56,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:12:56,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:12:56,269 INFO L87 Difference]: Start difference. First operand 655 states and 1043 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-01-10 06:12:56,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:12:56,403 INFO L93 Difference]: Finished difference Result 1299 states and 2089 transitions. [2022-01-10 06:12:56,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:12:56,404 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 100 [2022-01-10 06:12:56,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:12:56,408 INFO L225 Difference]: With dead ends: 1299 [2022-01-10 06:12:56,408 INFO L226 Difference]: Without dead ends: 669 [2022-01-10 06:12:56,411 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:12:56,411 INFO L933 BasicCegarLoop]: 974 mSDtfsCounter, 114 mSDsluCounter, 1899 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 2873 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:12:56,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 2873 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:12:56,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2022-01-10 06:12:56,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 660. [2022-01-10 06:12:56,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 501 states have (on average 1.596806387225549) internal successors, (800), 522 states have internal predecessors, (800), 123 states have call successors, (123), 36 states have call predecessors, (123), 35 states have return successors, (122), 118 states have call predecessors, (122), 122 states have call successors, (122) [2022-01-10 06:12:56,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 1045 transitions. [2022-01-10 06:12:56,483 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 1045 transitions. Word has length 100 [2022-01-10 06:12:56,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:12:56,483 INFO L470 AbstractCegarLoop]: Abstraction has 660 states and 1045 transitions. [2022-01-10 06:12:56,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-01-10 06:12:56,484 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 1045 transitions. [2022-01-10 06:12:56,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-01-10 06:12:56,485 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:12:56,485 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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] [2022-01-10 06:12:56,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-01-10 06:12:56,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:12:56,699 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:12:56,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:12:56,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1318024482, now seen corresponding path program 1 times [2022-01-10 06:12:56,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:12:56,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1348100921] [2022-01-10 06:12:56,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:12:56,700 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:12:56,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:12:56,701 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:12:56,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-01-10 06:12:56,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:12:56,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 621 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:12:56,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:12:57,071 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-01-10 06:12:57,072 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:12:57,072 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:12:57,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1348100921] [2022-01-10 06:12:57,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1348100921] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:12:57,072 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:12:57,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:12:57,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721305716] [2022-01-10 06:12:57,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:12:57,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:12:57,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:12:57,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:12:57,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:12:57,073 INFO L87 Difference]: Start difference. First operand 660 states and 1045 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-01-10 06:12:57,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:12:57,209 INFO L93 Difference]: Finished difference Result 1250 states and 1985 transitions. [2022-01-10 06:12:57,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:12:57,213 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 101 [2022-01-10 06:12:57,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:12:57,217 INFO L225 Difference]: With dead ends: 1250 [2022-01-10 06:12:57,217 INFO L226 Difference]: Without dead ends: 660 [2022-01-10 06:12:57,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:12:57,220 INFO L933 BasicCegarLoop]: 977 mSDtfsCounter, 78 mSDsluCounter, 1899 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 2876 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:12:57,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 2876 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:12:57,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2022-01-10 06:12:57,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 660. [2022-01-10 06:12:57,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 501 states have (on average 1.5888223552894212) internal successors, (796), 522 states have internal predecessors, (796), 123 states have call successors, (123), 36 states have call predecessors, (123), 35 states have return successors, (122), 118 states have call predecessors, (122), 122 states have call successors, (122) [2022-01-10 06:12:57,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 1041 transitions. [2022-01-10 06:12:57,236 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 1041 transitions. Word has length 101 [2022-01-10 06:12:57,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:12:57,236 INFO L470 AbstractCegarLoop]: Abstraction has 660 states and 1041 transitions. [2022-01-10 06:12:57,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-01-10 06:12:57,236 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 1041 transitions. [2022-01-10 06:12:57,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-10 06:12:57,238 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:12:57,238 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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] [2022-01-10 06:12:57,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-01-10 06:12:57,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:12:57,451 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:12:57,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:12:57,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1169604019, now seen corresponding path program 1 times [2022-01-10 06:12:57,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:12:57,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [72105985] [2022-01-10 06:12:57,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:12:57,453 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:12:57,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:12:57,455 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:12:57,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-01-10 06:12:57,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:12:57,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 622 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:12:57,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:12:57,802 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-01-10 06:12:57,803 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:12:57,803 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:12:57,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [72105985] [2022-01-10 06:12:57,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [72105985] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:12:57,803 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:12:57,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:12:57,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911485200] [2022-01-10 06:12:57,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:12:57,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:12:57,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:12:57,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:12:57,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:12:57,804 INFO L87 Difference]: Start difference. First operand 660 states and 1041 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-01-10 06:12:57,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:12:57,885 INFO L93 Difference]: Finished difference Result 1250 states and 1981 transitions. [2022-01-10 06:12:57,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:12:57,886 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 102 [2022-01-10 06:12:57,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:12:57,889 INFO L225 Difference]: With dead ends: 1250 [2022-01-10 06:12:57,889 INFO L226 Difference]: Without dead ends: 660 [2022-01-10 06:12:57,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:12:57,892 INFO L933 BasicCegarLoop]: 977 mSDtfsCounter, 73 mSDsluCounter, 1899 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 2876 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:12:57,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 2876 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:12:57,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2022-01-10 06:12:57,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 660. [2022-01-10 06:12:57,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 501 states have (on average 1.5808383233532934) internal successors, (792), 522 states have internal predecessors, (792), 123 states have call successors, (123), 36 states have call predecessors, (123), 35 states have return successors, (122), 118 states have call predecessors, (122), 122 states have call successors, (122) [2022-01-10 06:12:57,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 1037 transitions. [2022-01-10 06:12:57,910 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 1037 transitions. Word has length 102 [2022-01-10 06:12:57,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:12:57,910 INFO L470 AbstractCegarLoop]: Abstraction has 660 states and 1037 transitions. [2022-01-10 06:12:57,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-01-10 06:12:57,911 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 1037 transitions. [2022-01-10 06:12:57,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-10 06:12:57,912 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:12:57,912 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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] [2022-01-10 06:12:57,924 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2022-01-10 06:12:58,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:12:58,122 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:12:58,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:12:58,123 INFO L85 PathProgramCache]: Analyzing trace with hash -221028659, now seen corresponding path program 1 times [2022-01-10 06:12:58,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:12:58,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1164478038] [2022-01-10 06:12:58,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:12:58,123 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:12:58,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:12:58,124 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:12:58,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-01-10 06:12:58,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:12:58,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 621 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 06:12:58,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:12:58,459 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-01-10 06:12:58,459 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:12:58,459 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:12:58,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1164478038] [2022-01-10 06:12:58,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1164478038] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:12:58,459 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:12:58,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 06:12:58,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994205754] [2022-01-10 06:12:58,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:12:58,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 06:12:58,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:12:58,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 06:12:58,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:12:58,460 INFO L87 Difference]: Start difference. First operand 660 states and 1037 transitions. Second operand has 7 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 3 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-01-10 06:12:58,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:12:58,584 INFO L93 Difference]: Finished difference Result 1259 states and 1991 transitions. [2022-01-10 06:12:58,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:12:58,586 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 3 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 102 [2022-01-10 06:12:58,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:12:58,589 INFO L225 Difference]: With dead ends: 1259 [2022-01-10 06:12:58,589 INFO L226 Difference]: Without dead ends: 648 [2022-01-10 06:12:58,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:12:58,592 INFO L933 BasicCegarLoop]: 1006 mSDtfsCounter, 107 mSDsluCounter, 4910 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 5916 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:12:58,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 5916 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:12:58,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2022-01-10 06:12:58,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 639. [2022-01-10 06:12:58,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 480 states have (on average 1.5729166666666667) internal successors, (755), 501 states have internal predecessors, (755), 123 states have call successors, (123), 36 states have call predecessors, (123), 35 states have return successors, (122), 118 states have call predecessors, (122), 122 states have call successors, (122) [2022-01-10 06:12:58,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 1000 transitions. [2022-01-10 06:12:58,633 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 1000 transitions. Word has length 102 [2022-01-10 06:12:58,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:12:58,633 INFO L470 AbstractCegarLoop]: Abstraction has 639 states and 1000 transitions. [2022-01-10 06:12:58,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 3 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-01-10 06:12:58,634 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 1000 transitions. [2022-01-10 06:12:58,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-01-10 06:12:58,634 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:12:58,634 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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] [2022-01-10 06:12:58,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-01-10 06:12:58,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:12:58,845 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:12:58,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:12:58,845 INFO L85 PathProgramCache]: Analyzing trace with hash 288086471, now seen corresponding path program 1 times [2022-01-10 06:12:58,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:12:58,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [813745940] [2022-01-10 06:12:58,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:12:58,846 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:12:58,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:12:58,847 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:12:58,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-01-10 06:12:59,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:12:59,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:12:59,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:12:59,189 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-01-10 06:12:59,190 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:12:59,190 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:12:59,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [813745940] [2022-01-10 06:12:59,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [813745940] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:12:59,190 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:12:59,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:12:59,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564658722] [2022-01-10 06:12:59,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:12:59,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:12:59,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:12:59,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:12:59,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:12:59,191 INFO L87 Difference]: Start difference. First operand 639 states and 1000 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-01-10 06:12:59,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:12:59,257 INFO L93 Difference]: Finished difference Result 1229 states and 1940 transitions. [2022-01-10 06:12:59,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:12:59,258 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 103 [2022-01-10 06:12:59,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:12:59,261 INFO L225 Difference]: With dead ends: 1229 [2022-01-10 06:12:59,261 INFO L226 Difference]: Without dead ends: 639 [2022-01-10 06:12:59,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:12:59,263 INFO L933 BasicCegarLoop]: 977 mSDtfsCounter, 41 mSDsluCounter, 1899 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 2876 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:12:59,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 2876 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:12:59,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2022-01-10 06:12:59,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 639. [2022-01-10 06:12:59,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 480 states have (on average 1.5708333333333333) internal successors, (754), 501 states have internal predecessors, (754), 123 states have call successors, (123), 36 states have call predecessors, (123), 35 states have return successors, (122), 118 states have call predecessors, (122), 122 states have call successors, (122) [2022-01-10 06:12:59,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 999 transitions. [2022-01-10 06:12:59,275 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 999 transitions. Word has length 103 [2022-01-10 06:12:59,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:12:59,275 INFO L470 AbstractCegarLoop]: Abstraction has 639 states and 999 transitions. [2022-01-10 06:12:59,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-01-10 06:12:59,275 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 999 transitions. [2022-01-10 06:12:59,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-01-10 06:12:59,276 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:12:59,276 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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] [2022-01-10 06:12:59,300 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2022-01-10 06:12:59,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:12:59,486 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:12:59,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:12:59,486 INFO L85 PathProgramCache]: Analyzing trace with hash -503385902, now seen corresponding path program 1 times [2022-01-10 06:12:59,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:12:59,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [323099044] [2022-01-10 06:12:59,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:12:59,487 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:12:59,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:12:59,488 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:12:59,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-01-10 06:12:59,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:12:59,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 624 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:12:59,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:12:59,827 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-01-10 06:12:59,828 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:12:59,828 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:12:59,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [323099044] [2022-01-10 06:12:59,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [323099044] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:12:59,828 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:12:59,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:12:59,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736578504] [2022-01-10 06:12:59,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:12:59,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:12:59,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:12:59,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:12:59,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:12:59,829 INFO L87 Difference]: Start difference. First operand 639 states and 999 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-01-10 06:12:59,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:12:59,900 INFO L93 Difference]: Finished difference Result 1229 states and 1939 transitions. [2022-01-10 06:12:59,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:12:59,902 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 104 [2022-01-10 06:12:59,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:12:59,904 INFO L225 Difference]: With dead ends: 1229 [2022-01-10 06:12:59,904 INFO L226 Difference]: Without dead ends: 639 [2022-01-10 06:12:59,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:12:59,907 INFO L933 BasicCegarLoop]: 977 mSDtfsCounter, 39 mSDsluCounter, 1899 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 2876 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:12:59,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 2876 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:12:59,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2022-01-10 06:12:59,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 639. [2022-01-10 06:12:59,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 480 states have (on average 1.56875) internal successors, (753), 501 states have internal predecessors, (753), 123 states have call successors, (123), 36 states have call predecessors, (123), 35 states have return successors, (122), 118 states have call predecessors, (122), 122 states have call successors, (122) [2022-01-10 06:12:59,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 998 transitions. [2022-01-10 06:12:59,918 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 998 transitions. Word has length 104 [2022-01-10 06:12:59,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:12:59,918 INFO L470 AbstractCegarLoop]: Abstraction has 639 states and 998 transitions. [2022-01-10 06:12:59,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-01-10 06:12:59,919 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 998 transitions. [2022-01-10 06:12:59,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-01-10 06:12:59,920 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:12:59,920 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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] [2022-01-10 06:12:59,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-01-10 06:13:00,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:13:00,130 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:13:00,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:13:00,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1642448622, now seen corresponding path program 1 times [2022-01-10 06:13:00,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:13:00,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [839699582] [2022-01-10 06:13:00,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:13:00,131 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:13:00,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:13:00,141 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:13:00,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-01-10 06:13:00,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:13:00,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 624 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:13:00,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:13:00,458 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-01-10 06:13:00,459 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:13:00,459 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:13:00,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [839699582] [2022-01-10 06:13:00,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [839699582] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:13:00,459 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:13:00,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:13:00,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834245578] [2022-01-10 06:13:00,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:13:00,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:13:00,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:13:00,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:13:00,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:13:00,460 INFO L87 Difference]: Start difference. First operand 639 states and 998 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-01-10 06:13:00,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:13:00,521 INFO L93 Difference]: Finished difference Result 1229 states and 1938 transitions. [2022-01-10 06:13:00,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:13:00,522 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 105 [2022-01-10 06:13:00,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:13:00,525 INFO L225 Difference]: With dead ends: 1229 [2022-01-10 06:13:00,525 INFO L226 Difference]: Without dead ends: 639 [2022-01-10 06:13:00,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:13:00,529 INFO L933 BasicCegarLoop]: 966 mSDtfsCounter, 65 mSDsluCounter, 1891 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 2857 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:13:00,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 2857 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:13:00,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2022-01-10 06:13:00,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 639. [2022-01-10 06:13:00,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 480 states have (on average 1.5666666666666667) internal successors, (752), 501 states have internal predecessors, (752), 123 states have call successors, (123), 36 states have call predecessors, (123), 35 states have return successors, (122), 118 states have call predecessors, (122), 122 states have call successors, (122) [2022-01-10 06:13:00,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 997 transitions. [2022-01-10 06:13:00,540 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 997 transitions. Word has length 105 [2022-01-10 06:13:00,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:13:00,541 INFO L470 AbstractCegarLoop]: Abstraction has 639 states and 997 transitions. [2022-01-10 06:13:00,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-01-10 06:13:00,541 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 997 transitions. [2022-01-10 06:13:00,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-01-10 06:13:00,542 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:13:00,542 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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] [2022-01-10 06:13:00,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-01-10 06:13:00,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:13:00,752 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:13:00,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:13:00,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1995537004, now seen corresponding path program 1 times [2022-01-10 06:13:00,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:13:00,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [597278029] [2022-01-10 06:13:00,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:13:00,753 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:13:00,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:13:00,754 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:13:00,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-01-10 06:13:00,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:13:01,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 625 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 06:13:01,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:13:01,189 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-01-10 06:13:01,189 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:13:01,189 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:13:01,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [597278029] [2022-01-10 06:13:01,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [597278029] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:13:01,189 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:13:01,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-10 06:13:01,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905176974] [2022-01-10 06:13:01,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:13:01,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 06:13:01,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:13:01,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 06:13:01,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:13:01,190 INFO L87 Difference]: Start difference. First operand 639 states and 997 transitions. Second operand has 8 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 3 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-01-10 06:13:01,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:13:01,355 INFO L93 Difference]: Finished difference Result 1228 states and 1934 transitions. [2022-01-10 06:13:01,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 06:13:01,357 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 3 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 105 [2022-01-10 06:13:01,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:13:01,360 INFO L225 Difference]: With dead ends: 1228 [2022-01-10 06:13:01,360 INFO L226 Difference]: Without dead ends: 644 [2022-01-10 06:13:01,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-01-10 06:13:01,363 INFO L933 BasicCegarLoop]: 954 mSDtfsCounter, 45 mSDsluCounter, 5693 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 6647 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:13:01,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 6647 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:13:01,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2022-01-10 06:13:01,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 641. [2022-01-10 06:13:01,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 641 states, 482 states have (on average 1.562240663900415) internal successors, (753), 503 states have internal predecessors, (753), 123 states have call successors, (123), 36 states have call predecessors, (123), 35 states have return successors, (122), 118 states have call predecessors, (122), 122 states have call successors, (122) [2022-01-10 06:13:01,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 998 transitions. [2022-01-10 06:13:01,380 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 998 transitions. Word has length 105 [2022-01-10 06:13:01,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:13:01,380 INFO L470 AbstractCegarLoop]: Abstraction has 641 states and 998 transitions. [2022-01-10 06:13:01,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 3 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-01-10 06:13:01,381 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 998 transitions. [2022-01-10 06:13:01,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-01-10 06:13:01,382 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:13:01,382 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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] [2022-01-10 06:13:01,395 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2022-01-10 06:13:01,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:13:01,596 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:13:01,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:13:01,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1997774887, now seen corresponding path program 1 times [2022-01-10 06:13:01,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:13:01,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1261032530] [2022-01-10 06:13:01,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:13:01,598 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:13:01,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:13:01,599 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:13:01,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-01-10 06:13:01,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:13:01,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 626 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:13:01,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:13:01,936 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-01-10 06:13:01,936 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:13:01,936 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:13:01,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1261032530] [2022-01-10 06:13:01,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1261032530] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:13:01,936 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:13:01,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:13:01,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992795297] [2022-01-10 06:13:01,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:13:01,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:13:01,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:13:01,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:13:01,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:13:01,938 INFO L87 Difference]: Start difference. First operand 641 states and 998 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-01-10 06:13:01,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:13:01,987 INFO L93 Difference]: Finished difference Result 1830 states and 2887 transitions. [2022-01-10 06:13:01,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:13:01,987 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 106 [2022-01-10 06:13:01,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:13:01,993 INFO L225 Difference]: With dead ends: 1830 [2022-01-10 06:13:01,994 INFO L226 Difference]: Without dead ends: 1251 [2022-01-10 06:13:01,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:13:01,996 INFO L933 BasicCegarLoop]: 1112 mSDtfsCounter, 921 mSDsluCounter, 946 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 921 SdHoareTripleChecker+Valid, 2058 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:13:01,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [921 Valid, 2058 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:13:01,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2022-01-10 06:13:02,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 1249. [2022-01-10 06:13:02,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1249 states, 944 states have (on average 1.56885593220339) internal successors, (1481), 982 states have internal predecessors, (1481), 235 states have call successors, (235), 71 states have call predecessors, (235), 69 states have return successors, (239), 228 states have call predecessors, (239), 233 states have call successors, (239) [2022-01-10 06:13:02,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1249 states to 1249 states and 1955 transitions. [2022-01-10 06:13:02,028 INFO L78 Accepts]: Start accepts. Automaton has 1249 states and 1955 transitions. Word has length 106 [2022-01-10 06:13:02,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:13:02,028 INFO L470 AbstractCegarLoop]: Abstraction has 1249 states and 1955 transitions. [2022-01-10 06:13:02,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-01-10 06:13:02,029 INFO L276 IsEmpty]: Start isEmpty. Operand 1249 states and 1955 transitions. [2022-01-10 06:13:02,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-01-10 06:13:02,030 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:13:02,030 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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] [2022-01-10 06:13:02,042 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-01-10 06:13:02,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:13:02,241 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:13:02,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:13:02,241 INFO L85 PathProgramCache]: Analyzing trace with hash 502711325, now seen corresponding path program 1 times [2022-01-10 06:13:02,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:13:02,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [331421815] [2022-01-10 06:13:02,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:13:02,242 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:13:02,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:13:02,243 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:13:02,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-01-10 06:13:02,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:13:02,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 627 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 06:13:02,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:13:02,877 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-10 06:13:02,877 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:13:02,877 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:13:02,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [331421815] [2022-01-10 06:13:02,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [331421815] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:13:02,877 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:13:02,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 06:13:02,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929460571] [2022-01-10 06:13:02,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:13:02,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:13:02,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:13:02,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:13:02,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:13:02,880 INFO L87 Difference]: Start difference. First operand 1249 states and 1955 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-01-10 06:13:03,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:13:03,265 INFO L93 Difference]: Finished difference Result 3532 states and 5656 transitions. [2022-01-10 06:13:03,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:13:03,266 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 107 [2022-01-10 06:13:03,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:13:03,279 INFO L225 Difference]: With dead ends: 3532 [2022-01-10 06:13:03,279 INFO L226 Difference]: Without dead ends: 2389 [2022-01-10 06:13:03,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:13:03,285 INFO L933 BasicCegarLoop]: 1095 mSDtfsCounter, 903 mSDsluCounter, 913 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 903 SdHoareTripleChecker+Valid, 2008 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 06:13:03,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [903 Valid, 2008 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 06:13:03,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2389 states. [2022-01-10 06:13:03,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2389 to 2361. [2022-01-10 06:13:03,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2361 states, 1778 states have (on average 1.5883014623172103) internal successors, (2824), 1851 states have internal predecessors, (2824), 453 states have call successors, (453), 133 states have call predecessors, (453), 129 states have return successors, (506), 437 states have call predecessors, (506), 449 states have call successors, (506) [2022-01-10 06:13:03,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2361 states to 2361 states and 3783 transitions. [2022-01-10 06:13:03,360 INFO L78 Accepts]: Start accepts. Automaton has 2361 states and 3783 transitions. Word has length 107 [2022-01-10 06:13:03,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:13:03,361 INFO L470 AbstractCegarLoop]: Abstraction has 2361 states and 3783 transitions. [2022-01-10 06:13:03,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-01-10 06:13:03,361 INFO L276 IsEmpty]: Start isEmpty. Operand 2361 states and 3783 transitions. [2022-01-10 06:13:03,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-01-10 06:13:03,366 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:13:03,367 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:13:03,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-01-10 06:13:03,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:13:03,596 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:13:03,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:13:03,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1312417806, now seen corresponding path program 1 times [2022-01-10 06:13:03,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:13:03,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1841520433] [2022-01-10 06:13:03,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:13:03,597 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:13:03,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:13:03,598 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:13:03,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-01-10 06:13:03,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:13:03,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 809 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:13:03,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:13:04,086 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-10 06:13:04,086 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:13:04,087 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:13:04,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1841520433] [2022-01-10 06:13:04,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1841520433] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:13:04,087 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:13:04,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:13:04,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901673632] [2022-01-10 06:13:04,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:13:04,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:13:04,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:13:04,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:13:04,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:13:04,088 INFO L87 Difference]: Start difference. First operand 2361 states and 3783 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2022-01-10 06:13:04,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:13:04,175 INFO L93 Difference]: Finished difference Result 4604 states and 7473 transitions. [2022-01-10 06:13:04,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:13:04,176 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) Word has length 151 [2022-01-10 06:13:04,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:13:04,188 INFO L225 Difference]: With dead ends: 4604 [2022-01-10 06:13:04,188 INFO L226 Difference]: Without dead ends: 2348 [2022-01-10 06:13:04,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:13:04,197 INFO L933 BasicCegarLoop]: 969 mSDtfsCounter, 905 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 905 SdHoareTripleChecker+Valid, 984 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:13:04,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [905 Valid, 984 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:13:04,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2348 states. [2022-01-10 06:13:04,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2348 to 2348. [2022-01-10 06:13:04,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2348 states, 1772 states have (on average 1.5857787810383748) internal successors, (2810), 1845 states have internal predecessors, (2810), 445 states have call successors, (445), 134 states have call predecessors, (445), 130 states have return successors, (498), 429 states have call predecessors, (498), 441 states have call successors, (498) [2022-01-10 06:13:04,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2348 states to 2348 states and 3753 transitions. [2022-01-10 06:13:04,295 INFO L78 Accepts]: Start accepts. Automaton has 2348 states and 3753 transitions. Word has length 151 [2022-01-10 06:13:04,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:13:04,311 INFO L470 AbstractCegarLoop]: Abstraction has 2348 states and 3753 transitions. [2022-01-10 06:13:04,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2022-01-10 06:13:04,312 INFO L276 IsEmpty]: Start isEmpty. Operand 2348 states and 3753 transitions. [2022-01-10 06:13:04,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-01-10 06:13:04,319 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:13:04,320 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:13:04,343 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2022-01-10 06:13:04,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:13:04,544 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:13:04,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:13:04,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1111638433, now seen corresponding path program 1 times [2022-01-10 06:13:04,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:13:04,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2037438456] [2022-01-10 06:13:04,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:13:04,545 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:13:04,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:13:04,548 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:13:04,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-01-10 06:13:04,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:13:04,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 822 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:13:04,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:13:05,046 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-01-10 06:13:05,047 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:13:05,047 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:13:05,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2037438456] [2022-01-10 06:13:05,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2037438456] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:13:05,047 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:13:05,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:13:05,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722614177] [2022-01-10 06:13:05,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:13:05,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:13:05,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:13:05,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:13:05,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:13:05,048 INFO L87 Difference]: Start difference. First operand 2348 states and 3753 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 3 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-01-10 06:13:05,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:13:05,109 INFO L93 Difference]: Finished difference Result 3465 states and 5546 transitions. [2022-01-10 06:13:05,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:13:05,109 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 3 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 158 [2022-01-10 06:13:05,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:13:05,121 INFO L225 Difference]: With dead ends: 3465 [2022-01-10 06:13:05,121 INFO L226 Difference]: Without dead ends: 2350 [2022-01-10 06:13:05,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:13:05,130 INFO L933 BasicCegarLoop]: 1886 mSDtfsCounter, 899 mSDsluCounter, 945 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 899 SdHoareTripleChecker+Valid, 2831 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:13:05,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [899 Valid, 2831 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:13:05,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2350 states. [2022-01-10 06:13:05,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2350 to 1799. [2022-01-10 06:13:05,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1799 states, 1359 states have (on average 1.576158940397351) internal successors, (2142), 1415 states have internal predecessors, (2142), 339 states have call successors, (339), 103 states have call predecessors, (339), 100 states have return successors, (357), 327 states have call predecessors, (357), 336 states have call successors, (357) [2022-01-10 06:13:05,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1799 states to 1799 states and 2838 transitions. [2022-01-10 06:13:05,199 INFO L78 Accepts]: Start accepts. Automaton has 1799 states and 2838 transitions. Word has length 158 [2022-01-10 06:13:05,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:13:05,200 INFO L470 AbstractCegarLoop]: Abstraction has 1799 states and 2838 transitions. [2022-01-10 06:13:05,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 3 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-01-10 06:13:05,200 INFO L276 IsEmpty]: Start isEmpty. Operand 1799 states and 2838 transitions. [2022-01-10 06:13:05,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-01-10 06:13:05,206 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:13:05,206 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:13:05,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-01-10 06:13:05,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:13:05,421 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:13:05,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:13:05,422 INFO L85 PathProgramCache]: Analyzing trace with hash 449178967, now seen corresponding path program 1 times [2022-01-10 06:13:05,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:13:05,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1929319016] [2022-01-10 06:13:05,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:13:05,423 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:13:05,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:13:05,424 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:13:05,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-01-10 06:13:05,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:13:05,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:13:05,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:13:05,944 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-01-10 06:13:05,944 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:13:05,944 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:13:05,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1929319016] [2022-01-10 06:13:05,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1929319016] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:13:05,944 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:13:05,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:13:05,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603647328] [2022-01-10 06:13:05,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:13:05,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:13:05,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:13:05,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:13:05,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:13:05,945 INFO L87 Difference]: Start difference. First operand 1799 states and 2838 transitions. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-01-10 06:13:06,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:13:06,641 INFO L93 Difference]: Finished difference Result 3502 states and 5669 transitions. [2022-01-10 06:13:06,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 06:13:06,642 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 157 [2022-01-10 06:13:06,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:13:06,649 INFO L225 Difference]: With dead ends: 3502 [2022-01-10 06:13:06,649 INFO L226 Difference]: Without dead ends: 1811 [2022-01-10 06:13:06,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:13:06,655 INFO L933 BasicCegarLoop]: 938 mSDtfsCounter, 895 mSDsluCounter, 1423 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 913 SdHoareTripleChecker+Valid, 2361 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-10 06:13:06,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [913 Valid, 2361 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-10 06:13:06,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1811 states. [2022-01-10 06:13:06,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1811 to 1811. [2022-01-10 06:13:06,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1811 states, 1368 states have (on average 1.5723684210526316) internal successors, (2151), 1424 states have internal predecessors, (2151), 339 states have call successors, (339), 106 states have call predecessors, (339), 103 states have return successors, (360), 327 states have call predecessors, (360), 336 states have call successors, (360) [2022-01-10 06:13:06,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1811 states to 1811 states and 2850 transitions. [2022-01-10 06:13:06,700 INFO L78 Accepts]: Start accepts. Automaton has 1811 states and 2850 transitions. Word has length 157 [2022-01-10 06:13:06,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:13:06,700 INFO L470 AbstractCegarLoop]: Abstraction has 1811 states and 2850 transitions. [2022-01-10 06:13:06,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-01-10 06:13:06,700 INFO L276 IsEmpty]: Start isEmpty. Operand 1811 states and 2850 transitions. [2022-01-10 06:13:06,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-01-10 06:13:06,705 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:13:06,705 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:13:06,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-01-10 06:13:06,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:13:06,917 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:13:06,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:13:06,917 INFO L85 PathProgramCache]: Analyzing trace with hash -338987438, now seen corresponding path program 1 times [2022-01-10 06:13:06,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:13:06,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1128262014] [2022-01-10 06:13:06,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:13:06,917 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:13:06,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:13:06,918 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:13:06,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-01-10 06:13:07,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:13:07,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 824 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:13:07,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:13:07,431 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-01-10 06:13:07,431 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:13:07,431 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:13:07,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1128262014] [2022-01-10 06:13:07,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1128262014] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:13:07,431 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:13:07,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:13:07,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628375791] [2022-01-10 06:13:07,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:13:07,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:13:07,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:13:07,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:13:07,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:13:07,432 INFO L87 Difference]: Start difference. First operand 1811 states and 2850 transitions. Second operand has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-01-10 06:13:08,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:13:08,085 INFO L93 Difference]: Finished difference Result 3529 states and 5690 transitions. [2022-01-10 06:13:08,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 06:13:08,087 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 160 [2022-01-10 06:13:08,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:13:08,095 INFO L225 Difference]: With dead ends: 3529 [2022-01-10 06:13:08,095 INFO L226 Difference]: Without dead ends: 1826 [2022-01-10 06:13:08,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:13:08,100 INFO L933 BasicCegarLoop]: 939 mSDtfsCounter, 896 mSDsluCounter, 1423 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 913 SdHoareTripleChecker+Valid, 2362 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-10 06:13:08,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [913 Valid, 2362 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 536 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-10 06:13:08,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1826 states. [2022-01-10 06:13:08,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1826 to 1826. [2022-01-10 06:13:08,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1826 states, 1380 states have (on average 1.567391304347826) internal successors, (2163), 1436 states have internal predecessors, (2163), 339 states have call successors, (339), 109 states have call predecessors, (339), 106 states have return successors, (363), 327 states have call predecessors, (363), 336 states have call successors, (363) [2022-01-10 06:13:08,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1826 states to 1826 states and 2865 transitions. [2022-01-10 06:13:08,168 INFO L78 Accepts]: Start accepts. Automaton has 1826 states and 2865 transitions. Word has length 160 [2022-01-10 06:13:08,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:13:08,168 INFO L470 AbstractCegarLoop]: Abstraction has 1826 states and 2865 transitions. [2022-01-10 06:13:08,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-01-10 06:13:08,168 INFO L276 IsEmpty]: Start isEmpty. Operand 1826 states and 2865 transitions. [2022-01-10 06:13:08,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-01-10 06:13:08,173 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:13:08,173 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:13:08,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-01-10 06:13:08,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:13:08,384 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:13:08,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:13:08,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1335044211, now seen corresponding path program 1 times [2022-01-10 06:13:08,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:13:08,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [317594150] [2022-01-10 06:13:08,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:13:08,385 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:13:08,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:13:08,391 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:13:08,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-01-10 06:13:08,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:13:08,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 827 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:13:08,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:13:08,778 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-01-10 06:13:08,778 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:13:08,778 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:13:08,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [317594150] [2022-01-10 06:13:08,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [317594150] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:13:08,778 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:13:08,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:13:08,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703535501] [2022-01-10 06:13:08,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:13:08,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:13:08,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:13:08,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:13:08,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:13:08,779 INFO L87 Difference]: Start difference. First operand 1826 states and 2865 transitions. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-01-10 06:13:09,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:13:09,291 INFO L93 Difference]: Finished difference Result 3562 states and 5717 transitions. [2022-01-10 06:13:09,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 06:13:09,292 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 163 [2022-01-10 06:13:09,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:13:09,320 INFO L225 Difference]: With dead ends: 3562 [2022-01-10 06:13:09,320 INFO L226 Difference]: Without dead ends: 1844 [2022-01-10 06:13:09,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:13:09,329 INFO L933 BasicCegarLoop]: 939 mSDtfsCounter, 884 mSDsluCounter, 1423 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 901 SdHoareTripleChecker+Valid, 2362 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-10 06:13:09,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [901 Valid, 2362 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-10 06:13:09,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2022-01-10 06:13:09,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 1844. [2022-01-10 06:13:09,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1844 states, 1395 states have (on average 1.5612903225806452) internal successors, (2178), 1451 states have internal predecessors, (2178), 339 states have call successors, (339), 112 states have call predecessors, (339), 109 states have return successors, (366), 327 states have call predecessors, (366), 336 states have call successors, (366) [2022-01-10 06:13:09,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1844 states to 1844 states and 2883 transitions. [2022-01-10 06:13:09,390 INFO L78 Accepts]: Start accepts. Automaton has 1844 states and 2883 transitions. Word has length 163 [2022-01-10 06:13:09,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:13:09,390 INFO L470 AbstractCegarLoop]: Abstraction has 1844 states and 2883 transitions. [2022-01-10 06:13:09,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-01-10 06:13:09,390 INFO L276 IsEmpty]: Start isEmpty. Operand 1844 states and 2883 transitions. [2022-01-10 06:13:09,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-01-10 06:13:09,411 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:13:09,411 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:13:09,423 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2022-01-10 06:13:09,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:13:09,623 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:13:09,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:13:09,623 INFO L85 PathProgramCache]: Analyzing trace with hash 390658598, now seen corresponding path program 1 times [2022-01-10 06:13:09,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:13:09,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2069941026] [2022-01-10 06:13:09,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:13:09,624 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:13:09,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:13:09,625 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:13:09,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-01-10 06:13:09,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:13:09,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 830 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:13:09,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:13:10,051 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-01-10 06:13:10,051 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:13:10,051 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:13:10,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2069941026] [2022-01-10 06:13:10,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2069941026] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:13:10,052 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:13:10,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:13:10,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485331759] [2022-01-10 06:13:10,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:13:10,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:13:10,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:13:10,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:13:10,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:13:10,053 INFO L87 Difference]: Start difference. First operand 1844 states and 2883 transitions. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-01-10 06:13:10,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:13:10,639 INFO L93 Difference]: Finished difference Result 3601 states and 5750 transitions. [2022-01-10 06:13:10,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 06:13:10,639 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 166 [2022-01-10 06:13:10,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:13:10,653 INFO L225 Difference]: With dead ends: 3601 [2022-01-10 06:13:10,653 INFO L226 Difference]: Without dead ends: 1865 [2022-01-10 06:13:10,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:13:10,667 INFO L933 BasicCegarLoop]: 939 mSDtfsCounter, 888 mSDsluCounter, 1423 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 905 SdHoareTripleChecker+Valid, 2362 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-10 06:13:10,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [905 Valid, 2362 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 538 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-10 06:13:10,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1865 states. [2022-01-10 06:13:10,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1865 to 1865. [2022-01-10 06:13:10,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1865 states, 1413 states have (on average 1.5541401273885351) internal successors, (2196), 1469 states have internal predecessors, (2196), 339 states have call successors, (339), 115 states have call predecessors, (339), 112 states have return successors, (369), 327 states have call predecessors, (369), 336 states have call successors, (369) [2022-01-10 06:13:10,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1865 states to 1865 states and 2904 transitions. [2022-01-10 06:13:10,800 INFO L78 Accepts]: Start accepts. Automaton has 1865 states and 2904 transitions. Word has length 166 [2022-01-10 06:13:10,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:13:10,800 INFO L470 AbstractCegarLoop]: Abstraction has 1865 states and 2904 transitions. [2022-01-10 06:13:10,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-01-10 06:13:10,800 INFO L276 IsEmpty]: Start isEmpty. Operand 1865 states and 2904 transitions. [2022-01-10 06:13:10,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-01-10 06:13:10,832 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:13:10,832 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:13:10,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-01-10 06:13:11,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:13:11,048 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:13:11,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:13:11,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1618075023, now seen corresponding path program 1 times [2022-01-10 06:13:11,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:13:11,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1942227277] [2022-01-10 06:13:11,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:13:11,049 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:13:11,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:13:11,050 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:13:11,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-01-10 06:13:11,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:13:11,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 833 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-10 06:13:11,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:13:11,736 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-01-10 06:13:11,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:13:12,395 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-01-10 06:13:12,395 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:13:12,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1942227277] [2022-01-10 06:13:12,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1942227277] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:13:12,395 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:13:12,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2022-01-10 06:13:12,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901702116] [2022-01-10 06:13:12,395 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:13:12,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-10 06:13:12,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:13:12,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-10 06:13:12,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2022-01-10 06:13:12,396 INFO L87 Difference]: Start difference. First operand 1865 states and 2904 transitions. Second operand has 18 states, 18 states have (on average 9.5) internal successors, (171), 14 states have internal predecessors, (171), 8 states have call successors, (41), 6 states have call predecessors, (41), 12 states have return successors, (41), 12 states have call predecessors, (41), 8 states have call successors, (41) [2022-01-10 06:13:20,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:13:20,258 INFO L93 Difference]: Finished difference Result 6046 states and 9685 transitions. [2022-01-10 06:13:20,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-10 06:13:20,259 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 9.5) internal successors, (171), 14 states have internal predecessors, (171), 8 states have call successors, (41), 6 states have call predecessors, (41), 12 states have return successors, (41), 12 states have call predecessors, (41), 8 states have call successors, (41) Word has length 169 [2022-01-10 06:13:20,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:13:20,278 INFO L225 Difference]: With dead ends: 6046 [2022-01-10 06:13:20,278 INFO L226 Difference]: Without dead ends: 4289 [2022-01-10 06:13:20,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 322 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=738, Unknown=0, NotChecked=0, Total=930 [2022-01-10 06:13:20,284 INFO L933 BasicCegarLoop]: 1808 mSDtfsCounter, 6198 mSDsluCounter, 4001 mSDsCounter, 0 mSdLazyCounter, 10159 mSolverCounterSat, 2596 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6295 SdHoareTripleChecker+Valid, 5809 SdHoareTripleChecker+Invalid, 12755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2596 IncrementalHoareTripleChecker+Valid, 10159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2022-01-10 06:13:20,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6295 Valid, 5809 Invalid, 12755 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2596 Valid, 10159 Invalid, 0 Unknown, 0 Unchecked, 7.4s Time] [2022-01-10 06:13:20,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4289 states. [2022-01-10 06:13:20,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4289 to 3840. [2022-01-10 06:13:20,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3840 states, 2844 states have (on average 1.5537974683544304) internal successors, (4419), 2977 states have internal predecessors, (4419), 751 states have call successors, (751), 222 states have call predecessors, (751), 244 states have return successors, (901), 749 states have call predecessors, (901), 745 states have call successors, (901) [2022-01-10 06:13:20,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3840 states to 3840 states and 6071 transitions. [2022-01-10 06:13:20,418 INFO L78 Accepts]: Start accepts. Automaton has 3840 states and 6071 transitions. Word has length 169 [2022-01-10 06:13:20,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:13:20,418 INFO L470 AbstractCegarLoop]: Abstraction has 3840 states and 6071 transitions. [2022-01-10 06:13:20,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 9.5) internal successors, (171), 14 states have internal predecessors, (171), 8 states have call successors, (41), 6 states have call predecessors, (41), 12 states have return successors, (41), 12 states have call predecessors, (41), 8 states have call successors, (41) [2022-01-10 06:13:20,419 INFO L276 IsEmpty]: Start isEmpty. Operand 3840 states and 6071 transitions. [2022-01-10 06:13:20,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-01-10 06:13:20,427 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:13:20,428 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:13:20,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-01-10 06:13:20,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:13:20,639 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:13:20,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:13:20,640 INFO L85 PathProgramCache]: Analyzing trace with hash -755713632, now seen corresponding path program 1 times [2022-01-10 06:13:20,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:13:20,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [181100660] [2022-01-10 06:13:20,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:13:20,640 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:13:20,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:13:20,642 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:13:20,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-01-10 06:13:20,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:13:20,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 836 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 06:13:20,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:13:21,150 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-01-10 06:13:21,150 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:13:21,150 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:13:21,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [181100660] [2022-01-10 06:13:21,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [181100660] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:13:21,151 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:13:21,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-10 06:13:21,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70012891] [2022-01-10 06:13:21,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:13:21,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 06:13:21,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:13:21,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 06:13:21,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:13:21,152 INFO L87 Difference]: Start difference. First operand 3840 states and 6071 transitions. Second operand has 8 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 3 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-01-10 06:13:21,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:13:21,451 INFO L93 Difference]: Finished difference Result 7482 states and 11886 transitions. [2022-01-10 06:13:21,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 06:13:21,452 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 3 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 172 [2022-01-10 06:13:21,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:13:21,472 INFO L225 Difference]: With dead ends: 7482 [2022-01-10 06:13:21,472 INFO L226 Difference]: Without dead ends: 3730 [2022-01-10 06:13:21,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-01-10 06:13:21,485 INFO L933 BasicCegarLoop]: 946 mSDtfsCounter, 57 mSDsluCounter, 5642 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 6588 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:13:21,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 6588 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:13:21,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3730 states. [2022-01-10 06:13:21,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3730 to 3721. [2022-01-10 06:13:21,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3721 states, 2755 states have (on average 1.558983666061706) internal successors, (4295), 2886 states have internal predecessors, (4295), 734 states have call successors, (734), 213 states have call predecessors, (734), 231 states have return successors, (866), 730 states have call predecessors, (866), 728 states have call successors, (866) [2022-01-10 06:13:21,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3721 states to 3721 states and 5895 transitions. [2022-01-10 06:13:21,606 INFO L78 Accepts]: Start accepts. Automaton has 3721 states and 5895 transitions. Word has length 172 [2022-01-10 06:13:21,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:13:21,607 INFO L470 AbstractCegarLoop]: Abstraction has 3721 states and 5895 transitions. [2022-01-10 06:13:21,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 3 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-01-10 06:13:21,607 INFO L276 IsEmpty]: Start isEmpty. Operand 3721 states and 5895 transitions. [2022-01-10 06:13:21,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-01-10 06:13:21,612 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:13:21,612 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:13:21,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-01-10 06:13:21,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:13:21,827 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:13:21,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:13:21,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1258455789, now seen corresponding path program 1 times [2022-01-10 06:13:21,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:13:21,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2141918714] [2022-01-10 06:13:21,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:13:21,828 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:13:21,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:13:21,830 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:13:21,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-01-10 06:13:22,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:13:22,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 852 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-10 06:13:22,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:13:22,428 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 50 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-01-10 06:13:22,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:13:22,937 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-01-10 06:13:22,937 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:13:22,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2141918714] [2022-01-10 06:13:22,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2141918714] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:13:22,937 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:13:22,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-01-10 06:13:22,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120169044] [2022-01-10 06:13:22,938 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:13:22,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-10 06:13:22,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:13:22,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-10 06:13:22,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-01-10 06:13:22,939 INFO L87 Difference]: Start difference. First operand 3721 states and 5895 transitions. Second operand has 14 states, 14 states have (on average 12.5) internal successors, (175), 12 states have internal predecessors, (175), 8 states have call successors, (43), 6 states have call predecessors, (43), 10 states have return successors, (42), 10 states have call predecessors, (42), 8 states have call successors, (42) [2022-01-10 06:13:28,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:13:28,185 INFO L93 Difference]: Finished difference Result 9315 states and 14961 transitions. [2022-01-10 06:13:28,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-10 06:13:28,185 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 12.5) internal successors, (175), 12 states have internal predecessors, (175), 8 states have call successors, (43), 6 states have call predecessors, (43), 10 states have return successors, (42), 10 states have call predecessors, (42), 8 states have call successors, (42) Word has length 181 [2022-01-10 06:13:28,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:13:28,218 INFO L225 Difference]: With dead ends: 9315 [2022-01-10 06:13:28,218 INFO L226 Difference]: Without dead ends: 5696 [2022-01-10 06:13:28,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 351 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2022-01-10 06:13:28,235 INFO L933 BasicCegarLoop]: 1715 mSDtfsCounter, 4293 mSDsluCounter, 3035 mSDsCounter, 0 mSdLazyCounter, 7568 mSolverCounterSat, 1518 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4384 SdHoareTripleChecker+Valid, 4750 SdHoareTripleChecker+Invalid, 9086 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1518 IncrementalHoareTripleChecker+Valid, 7568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-01-10 06:13:28,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4384 Valid, 4750 Invalid, 9086 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1518 Valid, 7568 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-01-10 06:13:28,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5696 states. [2022-01-10 06:13:28,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5696 to 5577. [2022-01-10 06:13:28,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5577 states, 4100 states have (on average 1.5614634146341464) internal successors, (6402), 4300 states have internal predecessors, (6402), 1129 states have call successors, (1129), 311 states have call predecessors, (1129), 347 states have return successors, (1354), 1136 states have call predecessors, (1354), 1120 states have call successors, (1354) [2022-01-10 06:13:28,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5577 states to 5577 states and 8885 transitions. [2022-01-10 06:13:28,526 INFO L78 Accepts]: Start accepts. Automaton has 5577 states and 8885 transitions. Word has length 181 [2022-01-10 06:13:28,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:13:28,526 INFO L470 AbstractCegarLoop]: Abstraction has 5577 states and 8885 transitions. [2022-01-10 06:13:28,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 12.5) internal successors, (175), 12 states have internal predecessors, (175), 8 states have call successors, (43), 6 states have call predecessors, (43), 10 states have return successors, (42), 10 states have call predecessors, (42), 8 states have call successors, (42) [2022-01-10 06:13:28,526 INFO L276 IsEmpty]: Start isEmpty. Operand 5577 states and 8885 transitions. [2022-01-10 06:13:28,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-01-10 06:13:28,531 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:13:28,532 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:13:28,550 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-01-10 06:13:28,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:13:28,747 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:13:28,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:13:28,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1560330470, now seen corresponding path program 1 times [2022-01-10 06:13:28,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:13:28,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [460354786] [2022-01-10 06:13:28,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:13:28,749 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:13:28,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:13:28,750 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:13:28,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-01-10 06:13:29,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:13:29,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 853 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:13:29,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:13:29,474 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 38 proven. 4 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-01-10 06:13:29,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:13:30,057 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-01-10 06:13:30,057 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:13:30,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [460354786] [2022-01-10 06:13:30,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [460354786] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:13:30,057 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:13:30,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2022-01-10 06:13:30,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020112010] [2022-01-10 06:13:30,058 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:13:30,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-10 06:13:30,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:13:30,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-10 06:13:30,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-01-10 06:13:30,059 INFO L87 Difference]: Start difference. First operand 5577 states and 8885 transitions. Second operand has 11 states, 11 states have (on average 13.909090909090908) internal successors, (153), 11 states have internal predecessors, (153), 6 states have call successors, (38), 5 states have call predecessors, (38), 7 states have return successors, (36), 7 states have call predecessors, (36), 6 states have call successors, (36) [2022-01-10 06:13:35,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:13:35,807 INFO L93 Difference]: Finished difference Result 22495 states and 36685 transitions. [2022-01-10 06:13:35,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-10 06:13:35,807 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 13.909090909090908) internal successors, (153), 11 states have internal predecessors, (153), 6 states have call successors, (38), 5 states have call predecessors, (38), 7 states have return successors, (36), 7 states have call predecessors, (36), 6 states have call successors, (36) Word has length 182 [2022-01-10 06:13:35,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:13:35,890 INFO L225 Difference]: With dead ends: 22495 [2022-01-10 06:13:35,890 INFO L226 Difference]: Without dead ends: 17020 [2022-01-10 06:13:35,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 362 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2022-01-10 06:13:35,921 INFO L933 BasicCegarLoop]: 1638 mSDtfsCounter, 7035 mSDsluCounter, 1946 mSDsCounter, 0 mSdLazyCounter, 6381 mSolverCounterSat, 2464 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7151 SdHoareTripleChecker+Valid, 3584 SdHoareTripleChecker+Invalid, 8845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2464 IncrementalHoareTripleChecker+Valid, 6381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:13:35,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7151 Valid, 3584 Invalid, 8845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2464 Valid, 6381 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-01-10 06:13:35,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17020 states. [2022-01-10 06:13:36,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17020 to 15798. [2022-01-10 06:13:36,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15798 states, 11470 states have (on average 1.5344376634699215) internal successors, (17600), 12057 states have internal predecessors, (17600), 3263 states have call successors, (3263), 944 states have call predecessors, (3263), 1064 states have return successors, (4312), 3288 states have call predecessors, (4312), 3236 states have call successors, (4312) [2022-01-10 06:13:36,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15798 states to 15798 states and 25175 transitions. [2022-01-10 06:13:36,657 INFO L78 Accepts]: Start accepts. Automaton has 15798 states and 25175 transitions. Word has length 182 [2022-01-10 06:13:36,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:13:36,657 INFO L470 AbstractCegarLoop]: Abstraction has 15798 states and 25175 transitions. [2022-01-10 06:13:36,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.909090909090908) internal successors, (153), 11 states have internal predecessors, (153), 6 states have call successors, (38), 5 states have call predecessors, (38), 7 states have return successors, (36), 7 states have call predecessors, (36), 6 states have call successors, (36) [2022-01-10 06:13:36,657 INFO L276 IsEmpty]: Start isEmpty. Operand 15798 states and 25175 transitions. [2022-01-10 06:13:36,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-01-10 06:13:36,661 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:13:36,661 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:13:36,674 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2022-01-10 06:13:36,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:13:36,874 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:13:36,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:13:36,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1465324997, now seen corresponding path program 1 times [2022-01-10 06:13:36,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:13:36,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [976229459] [2022-01-10 06:13:36,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:13:36,875 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:13:36,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:13:36,892 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:13:36,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-01-10 06:13:37,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:13:37,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 856 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:13:37,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:13:37,426 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-01-10 06:13:37,426 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:13:37,427 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:13:37,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [976229459] [2022-01-10 06:13:37,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [976229459] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:13:37,427 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:13:37,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:13:37,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695037499] [2022-01-10 06:13:37,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:13:37,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:13:37,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:13:37,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:13:37,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:13:37,428 INFO L87 Difference]: Start difference. First operand 15798 states and 25175 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 3 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2022-01-10 06:13:38,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:13:38,490 INFO L93 Difference]: Finished difference Result 46489 states and 75573 transitions. [2022-01-10 06:13:38,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:13:38,494 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 3 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) Word has length 182 [2022-01-10 06:13:38,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:13:38,679 INFO L225 Difference]: With dead ends: 46489 [2022-01-10 06:13:38,679 INFO L226 Difference]: Without dead ends: 30793 [2022-01-10 06:13:38,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:13:38,747 INFO L933 BasicCegarLoop]: 1516 mSDtfsCounter, 870 mSDsluCounter, 942 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 870 SdHoareTripleChecker+Valid, 2458 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:13:38,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [870 Valid, 2458 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:13:38,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30793 states. [2022-01-10 06:13:40,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30793 to 30791. [2022-01-10 06:13:40,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30791 states, 22365 states have (on average 1.534630002235636) internal successors, (34322), 23539 states have internal predecessors, (34322), 6305 states have call successors, (6305), 1880 states have call predecessors, (6305), 2120 states have return successors, (8981), 6355 states have call predecessors, (8981), 6251 states have call successors, (8981) [2022-01-10 06:13:40,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30791 states to 30791 states and 49608 transitions. [2022-01-10 06:13:40,593 INFO L78 Accepts]: Start accepts. Automaton has 30791 states and 49608 transitions. Word has length 182 [2022-01-10 06:13:40,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:13:40,594 INFO L470 AbstractCegarLoop]: Abstraction has 30791 states and 49608 transitions. [2022-01-10 06:13:40,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 3 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2022-01-10 06:13:40,594 INFO L276 IsEmpty]: Start isEmpty. Operand 30791 states and 49608 transitions. [2022-01-10 06:13:40,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-01-10 06:13:40,605 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:13:40,605 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:13:40,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-01-10 06:13:40,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:13:40,823 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION === [__utac_acc__Specification14_spec__1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:13:40,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:13:40,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1070145708, now seen corresponding path program 1 times [2022-01-10 06:13:40,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:13:40,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1611938603] [2022-01-10 06:13:40,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:13:40,824 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:13:40,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:13:40,986 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:13:40,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-01-10 06:13:41,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:13:41,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 857 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 06:13:41,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:13:43,319 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-01-10 06:13:43,320 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:13:43,320 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:13:43,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1611938603] [2022-01-10 06:13:43,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1611938603] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:13:43,320 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:13:43,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 06:13:43,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177989415] [2022-01-10 06:13:43,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:13:43,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 06:13:43,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:13:43,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 06:13:43,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:13:43,321 INFO L87 Difference]: Start difference. First operand 30791 states and 49608 transitions. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 7 states have internal predecessors, (125), 6 states have call successors, (25), 5 states have call predecessors, (25), 5 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) [2022-01-10 06:13:52,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:13:52,387 INFO L93 Difference]: Finished difference Result 99311 states and 164731 transitions. [2022-01-10 06:13:52,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 06:13:52,388 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 7 states have internal predecessors, (125), 6 states have call successors, (25), 5 states have call predecessors, (25), 5 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) Word has length 183 [2022-01-10 06:13:52,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:13:53,313 INFO L225 Difference]: With dead ends: 99311 [2022-01-10 06:13:53,313 INFO L226 Difference]: Without dead ends: 68701 [2022-01-10 06:13:53,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-01-10 06:13:53,470 INFO L933 BasicCegarLoop]: 1693 mSDtfsCounter, 4885 mSDsluCounter, 1113 mSDsCounter, 0 mSdLazyCounter, 4428 mSolverCounterSat, 1319 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5113 SdHoareTripleChecker+Valid, 2806 SdHoareTripleChecker+Invalid, 5747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1319 IncrementalHoareTripleChecker+Valid, 4428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:13:53,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5113 Valid, 2806 Invalid, 5747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1319 Valid, 4428 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2022-01-10 06:13:53,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68701 states.