./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/product-lines/elevator_spec13_product32.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/product-lines/elevator_spec13_product32.cil.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e7c9485412041f5ced738777edbcc586e5ce326d6f265b136a50fe41e5db19fb --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 00:37:53,607 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 00:37:53,608 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 00:37:53,656 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 00:37:53,657 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 00:37:53,659 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 00:37:53,660 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 00:37:53,663 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 00:37:53,664 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 00:37:53,667 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 00:37:53,667 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 00:37:53,668 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 00:37:53,669 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 00:37:53,670 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 00:37:53,672 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 00:37:53,675 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 00:37:53,676 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 00:37:53,676 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 00:37:53,678 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 00:37:53,682 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 00:37:53,682 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 00:37:53,683 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 00:37:53,684 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 00:37:53,685 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 00:37:53,696 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 00:37:53,696 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 00:37:53,696 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 00:37:53,697 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 00:37:53,698 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 00:37:53,698 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 00:37:53,699 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 00:37:53,699 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 00:37:53,700 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 00:37:53,701 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 00:37:53,702 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 00:37:53,702 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 00:37:53,703 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 00:37:53,703 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 00:37:53,703 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 00:37:53,704 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 00:37:53,704 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 00:37:53,705 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-16 00:37:53,721 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 00:37:53,722 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 00:37:53,723 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 00:37:53,723 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 00:37:53,723 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 00:37:53,723 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 00:37:53,724 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 00:37:53,724 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 00:37:53,724 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 00:37:53,724 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 00:37:53,725 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 00:37:53,725 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 00:37:53,725 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 00:37:53,725 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 00:37:53,726 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 00:37:53,726 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 00:37:53,726 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 00:37:53,726 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 00:37:53,726 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 00:37:53,726 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 00:37:53,726 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 00:37:53,727 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 00:37:53,727 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 00:37:53,727 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 00:37:53,727 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 00:37:53,727 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 00:37:53,727 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 00:37:53,727 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 00:37:53,728 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 00:37:53,728 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 00:37:53,728 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 00:37:53,728 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 00:37:53,728 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 00:37:53,728 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 00:37:53,729 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e7c9485412041f5ced738777edbcc586e5ce326d6f265b136a50fe41e5db19fb [2021-12-16 00:37:53,927 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 00:37:53,945 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 00:37:53,947 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 00:37:53,948 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 00:37:53,948 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 00:37:53,949 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/elevator_spec13_product32.cil.c [2021-12-16 00:37:53,991 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5744eb33b/9a612d33f458477ba1fddf81422f7936/FLAG37c5df137 [2021-12-16 00:37:54,427 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 00:37:54,429 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec13_product32.cil.c [2021-12-16 00:37:54,445 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5744eb33b/9a612d33f458477ba1fddf81422f7936/FLAG37c5df137 [2021-12-16 00:37:54,751 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5744eb33b/9a612d33f458477ba1fddf81422f7936 [2021-12-16 00:37:54,753 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 00:37:54,754 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 00:37:54,755 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 00:37:54,755 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 00:37:54,762 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 00:37:54,762 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 12:37:54" (1/1) ... [2021-12-16 00:37:54,763 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@763c2211 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:37:54, skipping insertion in model container [2021-12-16 00:37:54,764 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 12:37:54" (1/1) ... [2021-12-16 00:37:54,769 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 00:37:54,824 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 00:37:54,964 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec13_product32.cil.c[1546,1559] [2021-12-16 00:37:55,184 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 00:37:55,193 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 00:37:55,202 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec13_product32.cil.c[1546,1559] [2021-12-16 00:37:55,287 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 00:37:55,307 INFO L208 MainTranslator]: Completed translation [2021-12-16 00:37:55,307 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:37:55 WrapperNode [2021-12-16 00:37:55,307 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 00:37:55,308 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 00:37:55,309 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 00:37:55,309 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 00:37:55,313 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:37:55" (1/1) ... [2021-12-16 00:37:55,332 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:37:55" (1/1) ... [2021-12-16 00:37:55,364 INFO L137 Inliner]: procedures = 97, calls = 354, calls flagged for inlining = 30, calls inlined = 26, statements flattened = 938 [2021-12-16 00:37:55,365 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 00:37:55,365 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 00:37:55,365 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 00:37:55,365 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 00:37:55,371 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:37:55" (1/1) ... [2021-12-16 00:37:55,377 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:37:55" (1/1) ... [2021-12-16 00:37:55,381 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:37:55" (1/1) ... [2021-12-16 00:37:55,386 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:37:55" (1/1) ... [2021-12-16 00:37:55,408 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:37:55" (1/1) ... [2021-12-16 00:37:55,432 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:37:55" (1/1) ... [2021-12-16 00:37:55,436 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:37:55" (1/1) ... [2021-12-16 00:37:55,442 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 00:37:55,443 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 00:37:55,443 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 00:37:55,443 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 00:37:55,444 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:37:55" (1/1) ... [2021-12-16 00:37:55,451 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 00:37:55,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:37:55,484 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) [2021-12-16 00:37:55,501 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 [2021-12-16 00:37:55,512 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2021-12-16 00:37:55,512 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2021-12-16 00:37:55,512 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2021-12-16 00:37:55,512 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2021-12-16 00:37:55,512 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-12-16 00:37:55,512 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-12-16 00:37:55,512 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-12-16 00:37:55,512 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-12-16 00:37:55,513 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2021-12-16 00:37:55,513 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2021-12-16 00:37:55,513 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-12-16 00:37:55,513 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-12-16 00:37:55,513 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-12-16 00:37:55,514 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-12-16 00:37:55,514 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-12-16 00:37:55,514 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-12-16 00:37:55,514 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-12-16 00:37:55,514 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-12-16 00:37:55,514 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-12-16 00:37:55,514 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-12-16 00:37:55,514 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-12-16 00:37:55,514 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-12-16 00:37:55,515 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-12-16 00:37:55,515 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-12-16 00:37:55,515 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2021-12-16 00:37:55,515 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2021-12-16 00:37:55,515 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 00:37:55,515 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2021-12-16 00:37:55,515 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2021-12-16 00:37:55,515 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-12-16 00:37:55,516 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-12-16 00:37:55,516 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-12-16 00:37:55,516 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-12-16 00:37:55,516 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2021-12-16 00:37:55,516 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2021-12-16 00:37:55,516 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-12-16 00:37:55,516 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-12-16 00:37:55,517 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-12-16 00:37:55,517 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-12-16 00:37:55,517 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-12-16 00:37:55,517 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-12-16 00:37:55,517 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-12-16 00:37:55,517 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-12-16 00:37:55,517 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-12-16 00:37:55,518 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-12-16 00:37:55,518 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-12-16 00:37:55,518 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-12-16 00:37:55,518 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-12-16 00:37:55,518 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-12-16 00:37:55,518 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-12-16 00:37:55,518 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-12-16 00:37:55,518 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-12-16 00:37:55,519 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-12-16 00:37:55,519 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 00:37:55,519 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-12-16 00:37:55,520 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-12-16 00:37:55,520 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 00:37:55,521 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 00:37:55,521 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-12-16 00:37:55,521 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-12-16 00:37:55,521 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2021-12-16 00:37:55,521 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2021-12-16 00:37:55,654 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 00:37:55,655 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 00:37:56,378 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 00:37:56,392 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 00:37:56,392 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-16 00:37:56,394 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 12:37:56 BoogieIcfgContainer [2021-12-16 00:37:56,394 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 00:37:56,421 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 00:37:56,421 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 00:37:56,424 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 00:37:56,424 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 12:37:54" (1/3) ... [2021-12-16 00:37:56,425 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@658ae9e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 12:37:56, skipping insertion in model container [2021-12-16 00:37:56,425 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:37:55" (2/3) ... [2021-12-16 00:37:56,425 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@658ae9e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 12:37:56, skipping insertion in model container [2021-12-16 00:37:56,425 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 12:37:56" (3/3) ... [2021-12-16 00:37:56,427 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec13_product32.cil.c [2021-12-16 00:37:56,432 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 00:37:56,432 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-16 00:37:56,471 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 00:37:56,477 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 [2021-12-16 00:37:56,477 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-16 00:37:56,503 INFO L276 IsEmpty]: Start isEmpty. Operand has 637 states, 496 states have (on average 1.6733870967741935) internal successors, (830), 516 states have internal predecessors, (830), 110 states have call successors, (110), 29 states have call predecessors, (110), 29 states have return successors, (110), 106 states have call predecessors, (110), 110 states have call successors, (110) [2021-12-16 00:37:56,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-16 00:37:56,521 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:37:56,522 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:37:56,522 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:37:56,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:37:56,526 INFO L85 PathProgramCache]: Analyzing trace with hash 474929604, now seen corresponding path program 1 times [2021-12-16 00:37:56,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:37:56,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333497702] [2021-12-16 00:37:56,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:37:56,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:37:56,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:37:56,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 00:37:56,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:37:56,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 00:37:56,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:37:56,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-16 00:37:56,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:37:56,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:37:56,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:37:56,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 00:37:56,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:37:56,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-16 00:37:56,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:37:56,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-16 00:37:56,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:37:56,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-16 00:37:56,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:37:56,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-16 00:37:56,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:37:56,905 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-16 00:37:56,905 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:37:56,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333497702] [2021-12-16 00:37:56,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333497702] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:37:56,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872475408] [2021-12-16 00:37:56,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:37:56,908 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:37:56,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:37:56,910 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:37:56,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 00:37:57,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:37:57,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 1263 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 00:37:57,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:37:57,286 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-16 00:37:57,286 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:37:57,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872475408] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:37:57,303 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 00:37:57,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2021-12-16 00:37:57,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699448432] [2021-12-16 00:37:57,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:37:57,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 00:37:57,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:37:57,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 00:37:57,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-16 00:37:57,328 INFO L87 Difference]: Start difference. First operand has 637 states, 496 states have (on average 1.6733870967741935) internal successors, (830), 516 states have internal predecessors, (830), 110 states have call successors, (110), 29 states have call predecessors, (110), 29 states have return successors, (110), 106 states have call predecessors, (110), 110 states have call successors, (110) Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-16 00:37:57,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:37:57,452 INFO L93 Difference]: Finished difference Result 1273 states and 2116 transitions. [2021-12-16 00:37:57,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 00:37:57,454 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) Word has length 83 [2021-12-16 00:37:57,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:37:57,466 INFO L225 Difference]: With dead ends: 1273 [2021-12-16 00:37:57,466 INFO L226 Difference]: Without dead ends: 636 [2021-12-16 00:37:57,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-16 00:37:57,478 INFO L933 BasicCegarLoop]: 1023 mSDtfsCounter, 26 mSDsluCounter, 2037 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 3060 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 00:37:57,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 3060 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 00:37:57,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2021-12-16 00:37:57,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 636. [2021-12-16 00:37:57,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 636 states, 497 states have (on average 1.6579476861167002) internal successors, (824), 515 states have internal predecessors, (824), 110 states have call successors, (110), 30 states have call predecessors, (110), 28 states have return successors, (107), 104 states have call predecessors, (107), 107 states have call successors, (107) [2021-12-16 00:37:57,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 1041 transitions. [2021-12-16 00:37:57,563 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 1041 transitions. Word has length 83 [2021-12-16 00:37:57,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:37:57,564 INFO L470 AbstractCegarLoop]: Abstraction has 636 states and 1041 transitions. [2021-12-16 00:37:57,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-16 00:37:57,565 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 1041 transitions. [2021-12-16 00:37:57,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-16 00:37:57,569 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:37:57,570 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:37:57,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-16 00:37:57,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-12-16 00:37:57,786 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:37:57,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:37:57,786 INFO L85 PathProgramCache]: Analyzing trace with hash -205826649, now seen corresponding path program 1 times [2021-12-16 00:37:57,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:37:57,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400352015] [2021-12-16 00:37:57,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:37:57,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:37:57,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:37:57,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 00:37:57,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:37:57,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-16 00:37:57,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:37:57,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-16 00:37:57,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:37:57,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:37:57,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:37:58,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 00:37:58,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:37:58,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-16 00:37:58,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:37:58,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:37:58,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:37:58,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-16 00:37:58,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:37:58,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-16 00:37:58,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:37:58,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-16 00:37:58,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:37:58,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-16 00:37:58,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:37:58,190 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-16 00:37:58,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:37:58,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400352015] [2021-12-16 00:37:58,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400352015] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:37:58,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005745157] [2021-12-16 00:37:58,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:37:58,194 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:37:58,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:37:58,196 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:37:58,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-16 00:37:58,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:37:58,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 1509 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-16 00:37:58,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:37:58,655 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-16 00:37:58,655 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:37:58,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005745157] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:37:58,655 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 00:37:58,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 16 [2021-12-16 00:37:58,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423819610] [2021-12-16 00:37:58,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:37:58,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 00:37:58,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:37:58,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 00:37:58,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-12-16 00:37:58,659 INFO L87 Difference]: Start difference. First operand 636 states and 1041 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, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-16 00:37:58,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:37:58,787 INFO L93 Difference]: Finished difference Result 1286 states and 2109 transitions. [2021-12-16 00:37:58,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 00:37:58,787 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, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 101 [2021-12-16 00:37:58,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:37:58,795 INFO L225 Difference]: With dead ends: 1286 [2021-12-16 00:37:58,795 INFO L226 Difference]: Without dead ends: 660 [2021-12-16 00:37:58,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-12-16 00:37:58,800 INFO L933 BasicCegarLoop]: 1024 mSDtfsCounter, 119 mSDsluCounter, 5012 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 6036 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 00:37:58,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 6036 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 00:37:58,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2021-12-16 00:37:58,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 649. [2021-12-16 00:37:58,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 649 states, 507 states have (on average 1.6548323471400395) internal successors, (839), 527 states have internal predecessors, (839), 111 states have call successors, (111), 30 states have call predecessors, (111), 30 states have return successors, (113), 105 states have call predecessors, (113), 108 states have call successors, (113) [2021-12-16 00:37:58,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 1063 transitions. [2021-12-16 00:37:58,862 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 1063 transitions. Word has length 101 [2021-12-16 00:37:58,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:37:58,863 INFO L470 AbstractCegarLoop]: Abstraction has 649 states and 1063 transitions. [2021-12-16 00:37:58,863 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, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-16 00:37:58,863 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 1063 transitions. [2021-12-16 00:37:58,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-12-16 00:37:58,868 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:37:58,869 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:37:58,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-16 00:37:59,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-12-16 00:37:59,077 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:37:59,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:37:59,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1546466611, now seen corresponding path program 1 times [2021-12-16 00:37:59,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:37:59,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081417930] [2021-12-16 00:37:59,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:37:59,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:37:59,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:37:59,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 00:37:59,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:37:59,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-16 00:37:59,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:37:59,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-16 00:37:59,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:37:59,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:37:59,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:37:59,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 00:37:59,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:37:59,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-16 00:37:59,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:37:59,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-16 00:37:59,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:37:59,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-16 00:37:59,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:37:59,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-16 00:37:59,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:37:59,274 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-16 00:37:59,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:37:59,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081417930] [2021-12-16 00:37:59,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081417930] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:37:59,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584744072] [2021-12-16 00:37:59,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:37:59,275 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:37:59,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:37:59,279 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:37:59,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-16 00:37:59,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:37:59,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 1266 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-16 00:37:59,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:37:59,612 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-16 00:37:59,613 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:37:59,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584744072] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:37:59,613 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 00:37:59,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2021-12-16 00:37:59,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614912782] [2021-12-16 00:37:59,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:37:59,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 00:37:59,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:37:59,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 00:37:59,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-12-16 00:37:59,616 INFO L87 Difference]: Start difference. First operand 649 states and 1063 transitions. Second operand has 7 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-16 00:37:59,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:37:59,694 INFO L93 Difference]: Finished difference Result 1306 states and 2142 transitions. [2021-12-16 00:37:59,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 00:37:59,694 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 86 [2021-12-16 00:37:59,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:37:59,699 INFO L225 Difference]: With dead ends: 1306 [2021-12-16 00:37:59,699 INFO L226 Difference]: Without dead ends: 669 [2021-12-16 00:37:59,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-12-16 00:37:59,703 INFO L933 BasicCegarLoop]: 1021 mSDtfsCounter, 130 mSDsluCounter, 4986 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 6007 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 00:37:59,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 6007 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 00:37:59,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2021-12-16 00:37:59,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 649. [2021-12-16 00:37:59,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 649 states, 507 states have (on average 1.6548323471400395) internal successors, (839), 527 states have internal predecessors, (839), 111 states have call successors, (111), 30 states have call predecessors, (111), 30 states have return successors, (113), 105 states have call predecessors, (113), 108 states have call successors, (113) [2021-12-16 00:37:59,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 1063 transitions. [2021-12-16 00:37:59,736 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 1063 transitions. Word has length 86 [2021-12-16 00:37:59,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:37:59,736 INFO L470 AbstractCegarLoop]: Abstraction has 649 states and 1063 transitions. [2021-12-16 00:37:59,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-16 00:37:59,736 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 1063 transitions. [2021-12-16 00:37:59,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-12-16 00:37:59,738 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:37:59,738 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:37:59,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-16 00:37:59,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:37:59,956 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:37:59,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:37:59,956 INFO L85 PathProgramCache]: Analyzing trace with hash -712971247, now seen corresponding path program 1 times [2021-12-16 00:37:59,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:37:59,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116609036] [2021-12-16 00:37:59,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:37:59,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:37:59,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:37:59,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 00:37:59,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:00,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-16 00:38:00,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:00,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-16 00:38:00,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:00,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:38:00,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:00,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 00:38:00,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:00,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-16 00:38:00,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:00,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-16 00:38:00,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:00,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-16 00:38:00,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:00,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-16 00:38:00,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:00,072 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-16 00:38:00,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:38:00,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116609036] [2021-12-16 00:38:00,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116609036] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:38:00,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575612630] [2021-12-16 00:38:00,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:38:00,073 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:38:00,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:38:00,074 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:38:00,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-16 00:38:00,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:00,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 1266 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 00:38:00,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:38:00,368 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-16 00:38:00,368 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:38:00,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575612630] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:38:00,369 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 00:38:00,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2021-12-16 00:38:00,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012173796] [2021-12-16 00:38:00,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:38:00,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 00:38:00,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:38:00,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 00:38:00,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-16 00:38:00,371 INFO L87 Difference]: Start difference. First operand 649 states and 1063 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-16 00:38:00,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:38:00,422 INFO L93 Difference]: Finished difference Result 1301 states and 2132 transitions. [2021-12-16 00:38:00,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 00:38:00,422 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) Word has length 86 [2021-12-16 00:38:00,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:38:00,426 INFO L225 Difference]: With dead ends: 1301 [2021-12-16 00:38:00,426 INFO L226 Difference]: Without dead ends: 660 [2021-12-16 00:38:00,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-12-16 00:38:00,429 INFO L933 BasicCegarLoop]: 1013 mSDtfsCounter, 20 mSDsluCounter, 2015 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 3028 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 00:38:00,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 3028 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 00:38:00,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2021-12-16 00:38:00,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 658. [2021-12-16 00:38:00,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 515 states have (on average 1.6466019417475728) internal successors, (848), 535 states have internal predecessors, (848), 111 states have call successors, (111), 31 states have call predecessors, (111), 31 states have return successors, (112), 105 states have call predecessors, (112), 108 states have call successors, (112) [2021-12-16 00:38:00,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 1071 transitions. [2021-12-16 00:38:00,460 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 1071 transitions. Word has length 86 [2021-12-16 00:38:00,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:38:00,460 INFO L470 AbstractCegarLoop]: Abstraction has 658 states and 1071 transitions. [2021-12-16 00:38:00,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-16 00:38:00,461 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 1071 transitions. [2021-12-16 00:38:00,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-16 00:38:00,466 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:38:00,466 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:38:00,486 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-16 00:38:00,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:38:00,675 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:38:00,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:38:00,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1559357597, now seen corresponding path program 1 times [2021-12-16 00:38:00,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:38:00,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144903607] [2021-12-16 00:38:00,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:38:00,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:38:00,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:00,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 00:38:00,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:00,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-16 00:38:00,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:00,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-16 00:38:00,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:00,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:38:00,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:00,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 00:38:00,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:00,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-16 00:38:00,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:00,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:38:00,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:00,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-16 00:38:00,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:00,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-16 00:38:00,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:00,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-16 00:38:00,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:00,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-16 00:38:00,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:01,000 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-16 00:38:01,000 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:38:01,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144903607] [2021-12-16 00:38:01,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144903607] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:38:01,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001350785] [2021-12-16 00:38:01,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:38:01,001 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:38:01,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:38:01,002 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:38:01,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-16 00:38:01,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:01,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 1511 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-16 00:38:01,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:38:01,460 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-16 00:38:01,460 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:38:01,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001350785] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:38:01,461 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 00:38:01,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2021-12-16 00:38:01,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745366248] [2021-12-16 00:38:01,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:38:01,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 00:38:01,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:38:01,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 00:38:01,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-12-16 00:38:01,462 INFO L87 Difference]: Start difference. First operand 658 states and 1071 transitions. Second operand has 7 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-16 00:38:01,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:38:01,545 INFO L93 Difference]: Finished difference Result 1315 states and 2145 transitions. [2021-12-16 00:38:01,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 00:38:01,546 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 103 [2021-12-16 00:38:01,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:38:01,549 INFO L225 Difference]: With dead ends: 1315 [2021-12-16 00:38:01,549 INFO L226 Difference]: Without dead ends: 680 [2021-12-16 00:38:01,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-12-16 00:38:01,553 INFO L933 BasicCegarLoop]: 1018 mSDtfsCounter, 141 mSDsluCounter, 4960 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 5978 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 00:38:01,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 5978 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 00:38:01,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2021-12-16 00:38:01,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 658. [2021-12-16 00:38:01,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 515 states have (on average 1.6466019417475728) internal successors, (848), 535 states have internal predecessors, (848), 111 states have call successors, (111), 31 states have call predecessors, (111), 31 states have return successors, (112), 105 states have call predecessors, (112), 108 states have call successors, (112) [2021-12-16 00:38:01,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 1071 transitions. [2021-12-16 00:38:01,570 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 1071 transitions. Word has length 103 [2021-12-16 00:38:01,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:38:01,570 INFO L470 AbstractCegarLoop]: Abstraction has 658 states and 1071 transitions. [2021-12-16 00:38:01,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-16 00:38:01,570 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 1071 transitions. [2021-12-16 00:38:01,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-16 00:38:01,572 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:38:01,572 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:38:01,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-16 00:38:01,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:38:01,787 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:38:01,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:38:01,787 INFO L85 PathProgramCache]: Analyzing trace with hash 615361967, now seen corresponding path program 1 times [2021-12-16 00:38:01,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:38:01,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890836056] [2021-12-16 00:38:01,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:38:01,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:38:01,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:01,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 00:38:01,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:01,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-16 00:38:01,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:01,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 00:38:01,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:01,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:38:01,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:01,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 00:38:01,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:01,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-16 00:38:01,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:01,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-16 00:38:01,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:01,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-16 00:38:01,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:01,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-16 00:38:01,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:01,921 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-16 00:38:01,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:38:01,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890836056] [2021-12-16 00:38:01,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890836056] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:38:01,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16540815] [2021-12-16 00:38:01,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:38:01,922 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:38:01,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:38:01,923 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:38:01,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-16 00:38:02,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:02,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 1268 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 00:38:02,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:38:02,221 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-16 00:38:02,221 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:38:02,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16540815] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:38:02,222 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 00:38:02,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-12-16 00:38:02,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554776230] [2021-12-16 00:38:02,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:38:02,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 00:38:02,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:38:02,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 00:38:02,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-16 00:38:02,223 INFO L87 Difference]: Start difference. First operand 658 states and 1071 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, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-16 00:38:02,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:38:02,370 INFO L93 Difference]: Finished difference Result 1347 states and 2213 transitions. [2021-12-16 00:38:02,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 00:38:02,371 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, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 88 [2021-12-16 00:38:02,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:38:02,375 INFO L225 Difference]: With dead ends: 1347 [2021-12-16 00:38:02,375 INFO L226 Difference]: Without dead ends: 712 [2021-12-16 00:38:02,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-16 00:38:02,380 INFO L933 BasicCegarLoop]: 974 mSDtfsCounter, 167 mSDsluCounter, 1897 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 2871 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 00:38:02,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 2871 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 00:38:02,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states. [2021-12-16 00:38:02,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 703. [2021-12-16 00:38:02,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 559 states have (on average 1.667262969588551) internal successors, (932), 579 states have internal predecessors, (932), 111 states have call successors, (111), 32 states have call predecessors, (111), 32 states have return successors, (111), 105 states have call predecessors, (111), 108 states have call successors, (111) [2021-12-16 00:38:02,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 1154 transitions. [2021-12-16 00:38:02,401 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 1154 transitions. Word has length 88 [2021-12-16 00:38:02,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:38:02,401 INFO L470 AbstractCegarLoop]: Abstraction has 703 states and 1154 transitions. [2021-12-16 00:38:02,401 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, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-16 00:38:02,401 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 1154 transitions. [2021-12-16 00:38:02,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-16 00:38:02,403 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:38:02,403 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:38:02,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-16 00:38:02,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:38:02,625 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:38:02,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:38:02,625 INFO L85 PathProgramCache]: Analyzing trace with hash 472783284, now seen corresponding path program 1 times [2021-12-16 00:38:02,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:38:02,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274680925] [2021-12-16 00:38:02,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:38:02,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:38:02,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:02,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 00:38:02,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:02,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-16 00:38:02,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:02,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 00:38:02,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:02,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:38:02,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:02,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 00:38:02,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:02,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-16 00:38:02,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:02,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-16 00:38:02,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:02,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-16 00:38:02,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:02,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-16 00:38:02,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:02,765 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-16 00:38:02,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:38:02,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274680925] [2021-12-16 00:38:02,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274680925] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:38:02,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307230024] [2021-12-16 00:38:02,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:38:02,766 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:38:02,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:38:02,767 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:38:02,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-16 00:38:02,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:02,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 1265 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-16 00:38:02,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:38:03,099 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-16 00:38:03,099 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:38:03,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307230024] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:38:03,099 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 00:38:03,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2021-12-16 00:38:03,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441104369] [2021-12-16 00:38:03,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:38:03,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 00:38:03,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:38:03,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 00:38:03,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-12-16 00:38:03,101 INFO L87 Difference]: Start difference. First operand 703 states and 1154 transitions. Second operand has 8 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-16 00:38:03,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:38:03,237 INFO L93 Difference]: Finished difference Result 1417 states and 2328 transitions. [2021-12-16 00:38:03,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 00:38:03,237 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 89 [2021-12-16 00:38:03,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:38:03,242 INFO L225 Difference]: With dead ends: 1417 [2021-12-16 00:38:03,242 INFO L226 Difference]: Without dead ends: 737 [2021-12-16 00:38:03,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-12-16 00:38:03,246 INFO L933 BasicCegarLoop]: 1008 mSDtfsCounter, 140 mSDsluCounter, 5946 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 6954 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 00:38:03,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 6954 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 00:38:03,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2021-12-16 00:38:03,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 703. [2021-12-16 00:38:03,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 559 states have (on average 1.667262969588551) internal successors, (932), 579 states have internal predecessors, (932), 111 states have call successors, (111), 32 states have call predecessors, (111), 32 states have return successors, (111), 105 states have call predecessors, (111), 108 states have call successors, (111) [2021-12-16 00:38:03,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 1154 transitions. [2021-12-16 00:38:03,267 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 1154 transitions. Word has length 89 [2021-12-16 00:38:03,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:38:03,267 INFO L470 AbstractCegarLoop]: Abstraction has 703 states and 1154 transitions. [2021-12-16 00:38:03,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-16 00:38:03,268 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 1154 transitions. [2021-12-16 00:38:03,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-16 00:38:03,269 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:38:03,269 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:38:03,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-16 00:38:03,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:38:03,487 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:38:03,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:38:03,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1129503431, now seen corresponding path program 1 times [2021-12-16 00:38:03,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:38:03,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042422165] [2021-12-16 00:38:03,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:38:03,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:38:03,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:03,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 00:38:03,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:03,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-16 00:38:03,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:03,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-16 00:38:03,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:03,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:38:03,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:03,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 00:38:03,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:03,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-16 00:38:03,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:03,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-16 00:38:03,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:03,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-16 00:38:03,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:03,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-16 00:38:03,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:03,633 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-16 00:38:03,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:38:03,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042422165] [2021-12-16 00:38:03,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042422165] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:38:03,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628790080] [2021-12-16 00:38:03,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:38:03,634 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:38:03,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:38:03,635 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:38:03,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-16 00:38:03,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:03,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 1266 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-16 00:38:03,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:38:03,975 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-16 00:38:03,976 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:38:03,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628790080] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:38:03,976 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 00:38:03,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2021-12-16 00:38:03,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22408249] [2021-12-16 00:38:03,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:38:03,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 00:38:03,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:38:03,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 00:38:03,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-12-16 00:38:03,978 INFO L87 Difference]: Start difference. First operand 703 states and 1154 transitions. Second operand has 8 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-16 00:38:04,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:38:04,098 INFO L93 Difference]: Finished difference Result 1417 states and 2328 transitions. [2021-12-16 00:38:04,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 00:38:04,098 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 90 [2021-12-16 00:38:04,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:38:04,102 INFO L225 Difference]: With dead ends: 1417 [2021-12-16 00:38:04,102 INFO L226 Difference]: Without dead ends: 737 [2021-12-16 00:38:04,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-12-16 00:38:04,106 INFO L933 BasicCegarLoop]: 1008 mSDtfsCounter, 150 mSDsluCounter, 5934 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 6942 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 00:38:04,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 6942 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 00:38:04,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2021-12-16 00:38:04,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 703. [2021-12-16 00:38:04,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 559 states have (on average 1.667262969588551) internal successors, (932), 579 states have internal predecessors, (932), 111 states have call successors, (111), 32 states have call predecessors, (111), 32 states have return successors, (111), 105 states have call predecessors, (111), 108 states have call successors, (111) [2021-12-16 00:38:04,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 1154 transitions. [2021-12-16 00:38:04,133 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 1154 transitions. Word has length 90 [2021-12-16 00:38:04,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:38:04,134 INFO L470 AbstractCegarLoop]: Abstraction has 703 states and 1154 transitions. [2021-12-16 00:38:04,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-16 00:38:04,134 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 1154 transitions. [2021-12-16 00:38:04,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-16 00:38:04,135 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:38:04,135 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:38:04,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-16 00:38:04,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-12-16 00:38:04,353 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:38:04,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:38:04,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1993798937, now seen corresponding path program 1 times [2021-12-16 00:38:04,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:38:04,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003302453] [2021-12-16 00:38:04,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:38:04,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:38:04,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:04,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 00:38:04,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:04,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-16 00:38:04,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:04,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-16 00:38:04,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:04,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:38:04,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:04,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 00:38:04,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:04,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-16 00:38:04,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:04,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-16 00:38:04,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:04,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-16 00:38:04,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:04,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-16 00:38:04,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:04,480 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-16 00:38:04,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:38:04,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003302453] [2021-12-16 00:38:04,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003302453] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:38:04,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122396529] [2021-12-16 00:38:04,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:38:04,480 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:38:04,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:38:04,481 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:38:04,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-16 00:38:04,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:04,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 1267 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-16 00:38:04,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:38:04,810 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-16 00:38:04,810 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:38:04,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122396529] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:38:04,811 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 00:38:04,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2021-12-16 00:38:04,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194679064] [2021-12-16 00:38:04,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:38:04,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 00:38:04,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:38:04,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 00:38:04,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-12-16 00:38:04,813 INFO L87 Difference]: Start difference. First operand 703 states and 1154 transitions. Second operand has 8 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-16 00:38:04,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:38:04,948 INFO L93 Difference]: Finished difference Result 1408 states and 2313 transitions. [2021-12-16 00:38:04,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 00:38:04,949 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 91 [2021-12-16 00:38:04,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:38:04,952 INFO L225 Difference]: With dead ends: 1408 [2021-12-16 00:38:04,952 INFO L226 Difference]: Without dead ends: 728 [2021-12-16 00:38:04,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-12-16 00:38:04,956 INFO L933 BasicCegarLoop]: 1008 mSDtfsCounter, 160 mSDsluCounter, 5922 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 6930 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 00:38:04,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 6930 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 00:38:04,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2021-12-16 00:38:04,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 703. [2021-12-16 00:38:04,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 559 states have (on average 1.667262969588551) internal successors, (932), 579 states have internal predecessors, (932), 111 states have call successors, (111), 32 states have call predecessors, (111), 32 states have return successors, (111), 105 states have call predecessors, (111), 108 states have call successors, (111) [2021-12-16 00:38:04,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 1154 transitions. [2021-12-16 00:38:04,984 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 1154 transitions. Word has length 91 [2021-12-16 00:38:04,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:38:04,984 INFO L470 AbstractCegarLoop]: Abstraction has 703 states and 1154 transitions. [2021-12-16 00:38:04,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-16 00:38:04,984 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 1154 transitions. [2021-12-16 00:38:04,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-16 00:38:04,985 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:38:04,986 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:38:05,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-16 00:38:05,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:38:05,191 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:38:05,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:38:05,191 INFO L85 PathProgramCache]: Analyzing trace with hash 604240503, now seen corresponding path program 1 times [2021-12-16 00:38:05,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:38:05,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836121228] [2021-12-16 00:38:05,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:38:05,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:38:05,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:05,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 00:38:05,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:05,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-16 00:38:05,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:05,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-16 00:38:05,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:05,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:38:05,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:05,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 00:38:05,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:05,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-16 00:38:05,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:05,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-16 00:38:05,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:05,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-16 00:38:05,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:05,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-16 00:38:05,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:05,323 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-16 00:38:05,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:38:05,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836121228] [2021-12-16 00:38:05,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836121228] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:38:05,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891353103] [2021-12-16 00:38:05,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:38:05,324 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:38:05,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:38:05,327 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:38:05,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-16 00:38:05,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:05,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 1270 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 00:38:05,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:38:05,621 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-16 00:38:05,621 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:38:05,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891353103] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:38:05,621 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 00:38:05,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2021-12-16 00:38:05,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942361233] [2021-12-16 00:38:05,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:38:05,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 00:38:05,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:38:05,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 00:38:05,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-16 00:38:05,623 INFO L87 Difference]: Start difference. First operand 703 states and 1154 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, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-16 00:38:05,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:38:05,667 INFO L93 Difference]: Finished difference Result 1372 states and 2260 transitions. [2021-12-16 00:38:05,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 00:38:05,668 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, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 91 [2021-12-16 00:38:05,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:38:05,671 INFO L225 Difference]: With dead ends: 1372 [2021-12-16 00:38:05,671 INFO L226 Difference]: Without dead ends: 703 [2021-12-16 00:38:05,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-16 00:38:05,674 INFO L933 BasicCegarLoop]: 1011 mSDtfsCounter, 35 mSDsluCounter, 2015 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 3026 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 00:38:05,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 3026 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 00:38:05,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2021-12-16 00:38:05,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 703. [2021-12-16 00:38:05,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 559 states have (on average 1.6583184257602863) internal successors, (927), 579 states have internal predecessors, (927), 111 states have call successors, (111), 32 states have call predecessors, (111), 32 states have return successors, (111), 105 states have call predecessors, (111), 108 states have call successors, (111) [2021-12-16 00:38:05,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 1149 transitions. [2021-12-16 00:38:05,687 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 1149 transitions. Word has length 91 [2021-12-16 00:38:05,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:38:05,688 INFO L470 AbstractCegarLoop]: Abstraction has 703 states and 1149 transitions. [2021-12-16 00:38:05,688 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, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-16 00:38:05,688 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 1149 transitions. [2021-12-16 00:38:05,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-16 00:38:05,689 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:38:05,689 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:38:05,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-16 00:38:05,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-16 00:38:05,908 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:38:05,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:38:05,908 INFO L85 PathProgramCache]: Analyzing trace with hash -368202784, now seen corresponding path program 1 times [2021-12-16 00:38:05,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:38:05,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964716932] [2021-12-16 00:38:05,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:38:05,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:38:05,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:05,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 00:38:05,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:06,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-16 00:38:06,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:06,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-16 00:38:06,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:06,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:38:06,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:06,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 00:38:06,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:06,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 00:38:06,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:06,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-16 00:38:06,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:06,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-16 00:38:06,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:06,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-16 00:38:06,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:06,059 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-16 00:38:06,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:38:06,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964716932] [2021-12-16 00:38:06,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964716932] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:38:06,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577826639] [2021-12-16 00:38:06,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:38:06,060 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:38:06,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:38:06,061 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:38:06,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-16 00:38:06,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:06,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 1271 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-16 00:38:06,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:38:06,406 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-16 00:38:06,406 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:38:06,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577826639] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:38:06,407 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 00:38:06,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-12-16 00:38:06,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014756878] [2021-12-16 00:38:06,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:38:06,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 00:38:06,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:38:06,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 00:38:06,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-12-16 00:38:06,408 INFO L87 Difference]: Start difference. First operand 703 states and 1149 transitions. Second operand has 7 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-16 00:38:06,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:38:06,485 INFO L93 Difference]: Finished difference Result 1340 states and 2192 transitions. [2021-12-16 00:38:06,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 00:38:06,486 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 92 [2021-12-16 00:38:06,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:38:06,489 INFO L225 Difference]: With dead ends: 1340 [2021-12-16 00:38:06,489 INFO L226 Difference]: Without dead ends: 729 [2021-12-16 00:38:06,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-12-16 00:38:06,492 INFO L933 BasicCegarLoop]: 1015 mSDtfsCounter, 116 mSDsluCounter, 4974 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 5989 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 00:38:06,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 5989 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 00:38:06,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2021-12-16 00:38:06,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 716. [2021-12-16 00:38:06,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 569 states have (on average 1.655536028119508) internal successors, (942), 591 states have internal predecessors, (942), 112 states have call successors, (112), 32 states have call predecessors, (112), 34 states have return successors, (116), 106 states have call predecessors, (116), 109 states have call successors, (116) [2021-12-16 00:38:06,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1170 transitions. [2021-12-16 00:38:06,506 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1170 transitions. Word has length 92 [2021-12-16 00:38:06,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:38:06,506 INFO L470 AbstractCegarLoop]: Abstraction has 716 states and 1170 transitions. [2021-12-16 00:38:06,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-16 00:38:06,507 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1170 transitions. [2021-12-16 00:38:06,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-16 00:38:06,508 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:38:06,508 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:38:06,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-16 00:38:06,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-16 00:38:06,719 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:38:06,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:38:06,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1065110427, now seen corresponding path program 1 times [2021-12-16 00:38:06,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:38:06,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706207461] [2021-12-16 00:38:06,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:38:06,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:38:06,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:06,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 00:38:06,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:06,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-16 00:38:06,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:06,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-16 00:38:06,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:06,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:38:06,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:06,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 00:38:06,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:06,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-16 00:38:06,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:06,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-16 00:38:06,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:06,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-16 00:38:06,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:06,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-16 00:38:06,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:06,849 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-16 00:38:06,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:38:06,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706207461] [2021-12-16 00:38:06,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706207461] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:38:06,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249582958] [2021-12-16 00:38:06,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:38:06,850 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:38:06,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:38:06,851 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:38:06,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-16 00:38:07,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:07,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 1272 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-16 00:38:07,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:38:07,170 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-16 00:38:07,170 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:38:07,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249582958] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:38:07,171 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 00:38:07,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-12-16 00:38:07,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53171579] [2021-12-16 00:38:07,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:38:07,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 00:38:07,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:38:07,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 00:38:07,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-12-16 00:38:07,172 INFO L87 Difference]: Start difference. First operand 716 states and 1170 transitions. Second operand has 7 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-16 00:38:07,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:38:07,255 INFO L93 Difference]: Finished difference Result 1349 states and 2207 transitions. [2021-12-16 00:38:07,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 00:38:07,256 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 93 [2021-12-16 00:38:07,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:38:07,259 INFO L225 Difference]: With dead ends: 1349 [2021-12-16 00:38:07,259 INFO L226 Difference]: Without dead ends: 738 [2021-12-16 00:38:07,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-12-16 00:38:07,262 INFO L933 BasicCegarLoop]: 1015 mSDtfsCounter, 127 mSDsluCounter, 4962 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 5977 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 00:38:07,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 5977 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 00:38:07,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 738 states. [2021-12-16 00:38:07,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 738 to 716. [2021-12-16 00:38:07,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 569 states have (on average 1.655536028119508) internal successors, (942), 591 states have internal predecessors, (942), 112 states have call successors, (112), 32 states have call predecessors, (112), 34 states have return successors, (116), 106 states have call predecessors, (116), 109 states have call successors, (116) [2021-12-16 00:38:07,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1170 transitions. [2021-12-16 00:38:07,279 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1170 transitions. Word has length 93 [2021-12-16 00:38:07,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:38:07,280 INFO L470 AbstractCegarLoop]: Abstraction has 716 states and 1170 transitions. [2021-12-16 00:38:07,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-16 00:38:07,280 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1170 transitions. [2021-12-16 00:38:07,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-16 00:38:07,282 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:38:07,282 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:38:07,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-16 00:38:07,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-16 00:38:07,485 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:38:07,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:38:07,486 INFO L85 PathProgramCache]: Analyzing trace with hash 598337522, now seen corresponding path program 1 times [2021-12-16 00:38:07,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:38:07,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415692206] [2021-12-16 00:38:07,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:38:07,486 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:38:07,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:07,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 00:38:07,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:07,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-16 00:38:07,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:07,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-16 00:38:07,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:07,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:38:07,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:07,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 00:38:07,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:07,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-16 00:38:07,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:07,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:38:07,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:07,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-16 00:38:07,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:07,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-16 00:38:07,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:07,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-16 00:38:07,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:07,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-16 00:38:07,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:07,718 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-16 00:38:07,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:38:07,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415692206] [2021-12-16 00:38:07,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415692206] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:38:07,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153117912] [2021-12-16 00:38:07,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:38:07,719 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:38:07,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:38:07,723 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:38:07,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-16 00:38:07,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:07,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 1516 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 00:38:07,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:38:08,036 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-16 00:38:08,036 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:38:08,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153117912] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:38:08,036 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 00:38:08,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-12-16 00:38:08,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720396941] [2021-12-16 00:38:08,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:38:08,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 00:38:08,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:38:08,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 00:38:08,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-16 00:38:08,038 INFO L87 Difference]: Start difference. First operand 716 states and 1170 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-16 00:38:08,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:38:08,095 INFO L93 Difference]: Finished difference Result 1394 states and 2290 transitions. [2021-12-16 00:38:08,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 00:38:08,096 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 109 [2021-12-16 00:38:08,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:38:08,099 INFO L225 Difference]: With dead ends: 1394 [2021-12-16 00:38:08,099 INFO L226 Difference]: Without dead ends: 716 [2021-12-16 00:38:08,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-12-16 00:38:08,102 INFO L933 BasicCegarLoop]: 1013 mSDtfsCounter, 10 mSDsluCounter, 2015 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 3028 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 00:38:08,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 3028 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 00:38:08,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2021-12-16 00:38:08,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 716. [2021-12-16 00:38:08,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 569 states have (on average 1.6502636203866432) internal successors, (939), 591 states have internal predecessors, (939), 112 states have call successors, (112), 32 states have call predecessors, (112), 34 states have return successors, (116), 106 states have call predecessors, (116), 109 states have call successors, (116) [2021-12-16 00:38:08,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1167 transitions. [2021-12-16 00:38:08,137 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1167 transitions. Word has length 109 [2021-12-16 00:38:08,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:38:08,137 INFO L470 AbstractCegarLoop]: Abstraction has 716 states and 1167 transitions. [2021-12-16 00:38:08,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-16 00:38:08,137 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1167 transitions. [2021-12-16 00:38:08,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-12-16 00:38:08,139 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:38:08,139 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:38:08,156 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-16 00:38:08,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-16 00:38:08,355 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:38:08,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:38:08,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1473747804, now seen corresponding path program 1 times [2021-12-16 00:38:08,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:38:08,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005184465] [2021-12-16 00:38:08,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:38:08,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:38:08,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:08,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 00:38:08,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:08,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-16 00:38:08,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:08,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-16 00:38:08,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:08,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:38:08,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:08,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 00:38:08,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:08,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-16 00:38:08,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:08,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-16 00:38:08,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:08,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-16 00:38:08,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:08,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-16 00:38:08,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:08,471 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-16 00:38:08,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:38:08,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005184465] [2021-12-16 00:38:08,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005184465] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:38:08,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045512246] [2021-12-16 00:38:08,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:38:08,472 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:38:08,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:38:08,473 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:38:08,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-16 00:38:08,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:08,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 1273 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 00:38:08,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:38:08,780 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-16 00:38:08,780 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:38:08,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045512246] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:38:08,780 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 00:38:08,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-12-16 00:38:08,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633028200] [2021-12-16 00:38:08,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:38:08,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 00:38:08,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:38:08,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 00:38:08,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-16 00:38:08,781 INFO L87 Difference]: Start difference. First operand 716 states and 1167 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, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-16 00:38:08,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:38:08,896 INFO L93 Difference]: Finished difference Result 1390 states and 2285 transitions. [2021-12-16 00:38:08,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 00:38:08,896 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, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 94 [2021-12-16 00:38:08,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:38:08,899 INFO L225 Difference]: With dead ends: 1390 [2021-12-16 00:38:08,899 INFO L226 Difference]: Without dead ends: 779 [2021-12-16 00:38:08,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-16 00:38:08,902 INFO L933 BasicCegarLoop]: 960 mSDtfsCounter, 237 mSDsluCounter, 1891 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 2851 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 00:38:08,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 2851 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 00:38:08,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2021-12-16 00:38:08,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 761. [2021-12-16 00:38:08,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 761 states, 613 states have (on average 1.6688417618270799) internal successors, (1023), 635 states have internal predecessors, (1023), 112 states have call successors, (112), 33 states have call predecessors, (112), 35 states have return successors, (113), 106 states have call predecessors, (113), 109 states have call successors, (113) [2021-12-16 00:38:08,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 761 states to 761 states and 1248 transitions. [2021-12-16 00:38:08,916 INFO L78 Accepts]: Start accepts. Automaton has 761 states and 1248 transitions. Word has length 94 [2021-12-16 00:38:08,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:38:08,916 INFO L470 AbstractCegarLoop]: Abstraction has 761 states and 1248 transitions. [2021-12-16 00:38:08,916 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, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-16 00:38:08,916 INFO L276 IsEmpty]: Start isEmpty. Operand 761 states and 1248 transitions. [2021-12-16 00:38:08,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-16 00:38:08,918 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:38:08,918 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:38:08,937 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-16 00:38:09,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:38:09,135 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:38:09,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:38:09,135 INFO L85 PathProgramCache]: Analyzing trace with hash 374227709, now seen corresponding path program 1 times [2021-12-16 00:38:09,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:38:09,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167950326] [2021-12-16 00:38:09,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:38:09,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:38:09,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:09,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 00:38:09,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:09,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-16 00:38:09,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:09,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-16 00:38:09,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:09,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:38:09,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:09,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 00:38:09,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:09,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 00:38:09,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:09,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:38:09,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:09,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-16 00:38:09,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:09,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-16 00:38:09,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:09,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-16 00:38:09,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:09,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-16 00:38:09,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:09,356 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-16 00:38:09,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:38:09,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167950326] [2021-12-16 00:38:09,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167950326] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:38:09,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130495913] [2021-12-16 00:38:09,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:38:09,357 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:38:09,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:38:09,358 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:38:09,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-16 00:38:09,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:09,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 1513 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-16 00:38:09,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:38:09,731 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-16 00:38:09,731 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:38:09,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130495913] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:38:09,732 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 00:38:09,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [6] total 12 [2021-12-16 00:38:09,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353945892] [2021-12-16 00:38:09,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:38:09,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 00:38:09,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:38:09,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 00:38:09,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-12-16 00:38:09,733 INFO L87 Difference]: Start difference. First operand 761 states and 1248 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, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-16 00:38:09,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:38:09,854 INFO L93 Difference]: Finished difference Result 1406 states and 2301 transitions. [2021-12-16 00:38:09,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 00:38:09,855 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, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 110 [2021-12-16 00:38:09,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:38:09,858 INFO L225 Difference]: With dead ends: 1406 [2021-12-16 00:38:09,858 INFO L226 Difference]: Without dead ends: 795 [2021-12-16 00:38:09,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-12-16 00:38:09,860 INFO L933 BasicCegarLoop]: 1000 mSDtfsCounter, 138 mSDsluCounter, 5907 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 6907 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 00:38:09,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 6907 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 00:38:09,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2021-12-16 00:38:09,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 761. [2021-12-16 00:38:09,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 761 states, 613 states have (on average 1.6688417618270799) internal successors, (1023), 635 states have internal predecessors, (1023), 112 states have call successors, (112), 33 states have call predecessors, (112), 35 states have return successors, (113), 106 states have call predecessors, (113), 109 states have call successors, (113) [2021-12-16 00:38:09,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 761 states to 761 states and 1248 transitions. [2021-12-16 00:38:09,877 INFO L78 Accepts]: Start accepts. Automaton has 761 states and 1248 transitions. Word has length 110 [2021-12-16 00:38:09,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:38:09,877 INFO L470 AbstractCegarLoop]: Abstraction has 761 states and 1248 transitions. [2021-12-16 00:38:09,877 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, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-16 00:38:09,877 INFO L276 IsEmpty]: Start isEmpty. Operand 761 states and 1248 transitions. [2021-12-16 00:38:09,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-16 00:38:09,879 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:38:09,879 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:38:09,911 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-16 00:38:10,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-16 00:38:10,099 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:38:10,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:38:10,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1807208768, now seen corresponding path program 1 times [2021-12-16 00:38:10,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:38:10,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567526454] [2021-12-16 00:38:10,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:38:10,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:38:10,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:10,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 00:38:10,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:10,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-16 00:38:10,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:10,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-16 00:38:10,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:10,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:38:10,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:10,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 00:38:10,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:10,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-16 00:38:10,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:10,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:38:10,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:10,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-16 00:38:10,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:10,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-16 00:38:10,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:10,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-16 00:38:10,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:10,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-16 00:38:10,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:10,403 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-16 00:38:10,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:38:10,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567526454] [2021-12-16 00:38:10,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567526454] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:38:10,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411390961] [2021-12-16 00:38:10,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:38:10,404 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:38:10,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:38:10,405 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:38:10,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-16 00:38:10,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:10,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 1514 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-16 00:38:10,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:38:10,769 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-16 00:38:10,770 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:38:10,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411390961] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:38:10,770 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 00:38:10,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [6] total 12 [2021-12-16 00:38:10,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840298362] [2021-12-16 00:38:10,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:38:10,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 00:38:10,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:38:10,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 00:38:10,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-12-16 00:38:10,771 INFO L87 Difference]: Start difference. First operand 761 states and 1248 transitions. Second operand has 8 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-16 00:38:10,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:38:10,886 INFO L93 Difference]: Finished difference Result 1397 states and 2287 transitions. [2021-12-16 00:38:10,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 00:38:10,886 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 111 [2021-12-16 00:38:10,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:38:10,889 INFO L225 Difference]: With dead ends: 1397 [2021-12-16 00:38:10,890 INFO L226 Difference]: Without dead ends: 786 [2021-12-16 00:38:10,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-12-16 00:38:10,892 INFO L933 BasicCegarLoop]: 1000 mSDtfsCounter, 148 mSDsluCounter, 5895 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 6895 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 00:38:10,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 6895 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 00:38:10,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 786 states. [2021-12-16 00:38:10,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 786 to 761. [2021-12-16 00:38:10,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 761 states, 613 states have (on average 1.6688417618270799) internal successors, (1023), 635 states have internal predecessors, (1023), 112 states have call successors, (112), 33 states have call predecessors, (112), 35 states have return successors, (113), 106 states have call predecessors, (113), 109 states have call successors, (113) [2021-12-16 00:38:10,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 761 states to 761 states and 1248 transitions. [2021-12-16 00:38:10,910 INFO L78 Accepts]: Start accepts. Automaton has 761 states and 1248 transitions. Word has length 111 [2021-12-16 00:38:10,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:38:10,910 INFO L470 AbstractCegarLoop]: Abstraction has 761 states and 1248 transitions. [2021-12-16 00:38:10,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-16 00:38:10,910 INFO L276 IsEmpty]: Start isEmpty. Operand 761 states and 1248 transitions. [2021-12-16 00:38:10,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-16 00:38:10,912 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:38:10,912 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:38:10,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-16 00:38:11,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-16 00:38:11,130 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:38:11,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:38:11,130 INFO L85 PathProgramCache]: Analyzing trace with hash -241867701, now seen corresponding path program 1 times [2021-12-16 00:38:11,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:38:11,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355434972] [2021-12-16 00:38:11,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:38:11,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:38:11,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:11,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 00:38:11,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:11,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-16 00:38:11,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:11,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-16 00:38:11,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:11,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:38:11,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:11,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 00:38:11,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:11,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-16 00:38:11,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:11,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-16 00:38:11,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:11,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-16 00:38:11,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:11,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-16 00:38:11,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:11,236 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-16 00:38:11,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:38:11,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355434972] [2021-12-16 00:38:11,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355434972] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:38:11,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840586390] [2021-12-16 00:38:11,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:38:11,236 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:38:11,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:38:11,237 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:38:11,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-16 00:38:11,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:11,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 1271 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-16 00:38:11,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:38:11,697 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-16 00:38:11,697 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:38:11,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840586390] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:38:11,697 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 00:38:11,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-12-16 00:38:11,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32153116] [2021-12-16 00:38:11,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:38:11,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 00:38:11,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:38:11,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 00:38:11,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-16 00:38:11,699 INFO L87 Difference]: Start difference. First operand 761 states and 1248 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-16 00:38:11,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:38:11,800 INFO L93 Difference]: Finished difference Result 1962 states and 3238 transitions. [2021-12-16 00:38:11,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 00:38:11,801 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 96 [2021-12-16 00:38:11,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:38:11,807 INFO L225 Difference]: With dead ends: 1962 [2021-12-16 00:38:11,807 INFO L226 Difference]: Without dead ends: 1355 [2021-12-16 00:38:11,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-16 00:38:11,810 INFO L933 BasicCegarLoop]: 1174 mSDtfsCounter, 933 mSDsluCounter, 987 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 933 SdHoareTripleChecker+Valid, 2161 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 00:38:11,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [933 Valid, 2161 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 00:38:11,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2021-12-16 00:38:11,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 1290. [2021-12-16 00:38:11,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1290 states, 1038 states have (on average 1.670520231213873) internal successors, (1734), 1069 states have internal predecessors, (1734), 194 states have call successors, (194), 56 states have call predecessors, (194), 57 states have return successors, (201), 179 states have call predecessors, (201), 190 states have call successors, (201) [2021-12-16 00:38:11,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1290 states to 1290 states and 2129 transitions. [2021-12-16 00:38:11,843 INFO L78 Accepts]: Start accepts. Automaton has 1290 states and 2129 transitions. Word has length 96 [2021-12-16 00:38:11,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:38:11,843 INFO L470 AbstractCegarLoop]: Abstraction has 1290 states and 2129 transitions. [2021-12-16 00:38:11,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-16 00:38:11,843 INFO L276 IsEmpty]: Start isEmpty. Operand 1290 states and 2129 transitions. [2021-12-16 00:38:11,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-12-16 00:38:11,847 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:38:11,847 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-16 00:38:11,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-16 00:38:12,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-16 00:38:12,064 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:38:12,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:38:12,064 INFO L85 PathProgramCache]: Analyzing trace with hash 499012968, now seen corresponding path program 1 times [2021-12-16 00:38:12,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:38:12,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748334762] [2021-12-16 00:38:12,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:38:12,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:38:12,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:12,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 00:38:12,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:12,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-16 00:38:12,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:12,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-16 00:38:12,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:12,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:38:12,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:12,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 00:38:12,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:12,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-16 00:38:12,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:12,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-16 00:38:12,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:12,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:38:12,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:12,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:38:12,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:12,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 00:38:12,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:12,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-16 00:38:12,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:12,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:38:12,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:12,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:38:12,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:12,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 00:38:12,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:12,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-16 00:38:12,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:12,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-12-16 00:38:12,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:12,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2021-12-16 00:38:12,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:12,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-16 00:38:12,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:12,343 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-16 00:38:12,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:38:12,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748334762] [2021-12-16 00:38:12,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748334762] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:38:12,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41436901] [2021-12-16 00:38:12,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:38:12,343 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:38:12,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:38:12,344 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:38:12,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-16 00:38:12,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:12,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 1639 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 00:38:12,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:38:12,783 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-16 00:38:12,783 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:38:12,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41436901] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:38:12,783 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 00:38:12,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2021-12-16 00:38:12,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096600366] [2021-12-16 00:38:12,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:38:12,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 00:38:12,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:38:12,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 00:38:12,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-16 00:38:12,784 INFO L87 Difference]: Start difference. First operand 1290 states and 2129 transitions. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-12-16 00:38:13,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:38:13,221 INFO L93 Difference]: Finished difference Result 2442 states and 4093 transitions. [2021-12-16 00:38:13,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 00:38:13,221 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 151 [2021-12-16 00:38:13,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:38:13,227 INFO L225 Difference]: With dead ends: 2442 [2021-12-16 00:38:13,227 INFO L226 Difference]: Without dead ends: 1306 [2021-12-16 00:38:13,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-12-16 00:38:13,232 INFO L933 BasicCegarLoop]: 994 mSDtfsCounter, 951 mSDsluCounter, 1583 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 969 SdHoareTripleChecker+Valid, 2577 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 00:38:13,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [969 Valid, 2577 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-16 00:38:13,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1306 states. [2021-12-16 00:38:13,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1306 to 1306. [2021-12-16 00:38:13,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1306 states, 1052 states have (on average 1.6711026615969582) internal successors, (1758), 1083 states have internal predecessors, (1758), 194 states have call successors, (194), 58 states have call predecessors, (194), 59 states have return successors, (203), 179 states have call predecessors, (203), 190 states have call successors, (203) [2021-12-16 00:38:13,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1306 states to 1306 states and 2155 transitions. [2021-12-16 00:38:13,304 INFO L78 Accepts]: Start accepts. Automaton has 1306 states and 2155 transitions. Word has length 151 [2021-12-16 00:38:13,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:38:13,304 INFO L470 AbstractCegarLoop]: Abstraction has 1306 states and 2155 transitions. [2021-12-16 00:38:13,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-12-16 00:38:13,304 INFO L276 IsEmpty]: Start isEmpty. Operand 1306 states and 2155 transitions. [2021-12-16 00:38:13,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-12-16 00:38:13,311 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:38:13,311 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-16 00:38:13,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-16 00:38:13,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-16 00:38:13,518 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:38:13,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:38:13,519 INFO L85 PathProgramCache]: Analyzing trace with hash -378302760, now seen corresponding path program 1 times [2021-12-16 00:38:13,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:38:13,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597563042] [2021-12-16 00:38:13,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:38:13,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:38:13,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:13,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 00:38:13,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:13,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-16 00:38:13,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:13,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-16 00:38:13,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:13,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:38:13,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:13,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 00:38:13,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:13,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-16 00:38:13,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:13,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-16 00:38:13,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:13,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:38:13,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:13,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:38:13,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:13,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-16 00:38:13,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:13,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-16 00:38:13,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:13,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:38:13,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:13,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:38:13,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:13,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-16 00:38:13,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:13,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-16 00:38:13,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:13,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-12-16 00:38:13,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:13,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-16 00:38:13,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:13,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-12-16 00:38:13,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:13,825 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-16 00:38:13,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:38:13,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597563042] [2021-12-16 00:38:13,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597563042] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:38:13,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559975083] [2021-12-16 00:38:13,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:38:13,826 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:38:13,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:38:13,833 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:38:13,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-16 00:38:14,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:14,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 1641 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-16 00:38:14,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:38:14,239 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-16 00:38:14,240 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:38:14,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559975083] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:38:14,240 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 00:38:14,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2021-12-16 00:38:14,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874876503] [2021-12-16 00:38:14,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:38:14,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 00:38:14,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:38:14,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 00:38:14,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-16 00:38:14,241 INFO L87 Difference]: Start difference. First operand 1306 states and 2155 transitions. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-12-16 00:38:14,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:38:14,368 INFO L93 Difference]: Finished difference Result 3321 states and 5464 transitions. [2021-12-16 00:38:14,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 00:38:14,369 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 152 [2021-12-16 00:38:14,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:38:14,378 INFO L225 Difference]: With dead ends: 3321 [2021-12-16 00:38:14,402 INFO L226 Difference]: Without dead ends: 2169 [2021-12-16 00:38:14,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-12-16 00:38:14,406 INFO L933 BasicCegarLoop]: 1454 mSDtfsCounter, 1058 mSDsluCounter, 3493 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1058 SdHoareTripleChecker+Valid, 4947 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 00:38:14,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1058 Valid, 4947 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 00:38:14,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2169 states. [2021-12-16 00:38:14,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2169 to 2161. [2021-12-16 00:38:14,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2161 states, 1732 states have (on average 1.6437644341801385) internal successors, (2847), 1766 states have internal predecessors, (2847), 327 states have call successors, (327), 98 states have call predecessors, (327), 101 states have return successors, (363), 312 states have call predecessors, (363), 321 states have call successors, (363) [2021-12-16 00:38:14,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2161 states to 2161 states and 3537 transitions. [2021-12-16 00:38:14,472 INFO L78 Accepts]: Start accepts. Automaton has 2161 states and 3537 transitions. Word has length 152 [2021-12-16 00:38:14,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:38:14,472 INFO L470 AbstractCegarLoop]: Abstraction has 2161 states and 3537 transitions. [2021-12-16 00:38:14,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-12-16 00:38:14,473 INFO L276 IsEmpty]: Start isEmpty. Operand 2161 states and 3537 transitions. [2021-12-16 00:38:14,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-12-16 00:38:14,478 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:38:14,478 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-16 00:38:14,498 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-12-16 00:38:14,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:38:14,683 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:38:14,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:38:14,684 INFO L85 PathProgramCache]: Analyzing trace with hash -56401732, now seen corresponding path program 1 times [2021-12-16 00:38:14,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:38:14,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205439997] [2021-12-16 00:38:14,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:38:14,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:38:14,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:14,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 00:38:14,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:14,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-16 00:38:14,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:14,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-16 00:38:14,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:14,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:38:14,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:14,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 00:38:14,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:14,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-16 00:38:14,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:14,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-16 00:38:14,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:14,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:38:14,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:14,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:38:14,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:14,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-16 00:38:14,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:14,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-16 00:38:14,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:14,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:38:14,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:14,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:38:14,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:14,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-16 00:38:14,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:14,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-16 00:38:14,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:14,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-16 00:38:14,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:14,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2021-12-16 00:38:14,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:14,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-16 00:38:14,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:14,937 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-16 00:38:14,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:38:14,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205439997] [2021-12-16 00:38:14,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205439997] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:38:14,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949592817] [2021-12-16 00:38:14,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:38:14,938 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:38:14,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:38:14,942 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:38:14,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-16 00:38:15,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:15,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 1638 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 00:38:15,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:38:15,378 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-16 00:38:15,379 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:38:15,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949592817] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:38:15,380 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 00:38:15,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2021-12-16 00:38:15,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136282878] [2021-12-16 00:38:15,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:38:15,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 00:38:15,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:38:15,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 00:38:15,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-16 00:38:15,382 INFO L87 Difference]: Start difference. First operand 2161 states and 3537 transitions. Second operand has 5 states, 5 states have (on average 19.6) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-12-16 00:38:15,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:38:15,796 INFO L93 Difference]: Finished difference Result 4200 states and 6998 transitions. [2021-12-16 00:38:15,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 00:38:15,797 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 153 [2021-12-16 00:38:15,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:38:15,806 INFO L225 Difference]: With dead ends: 4200 [2021-12-16 00:38:15,806 INFO L226 Difference]: Without dead ends: 2193 [2021-12-16 00:38:15,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-12-16 00:38:15,815 INFO L933 BasicCegarLoop]: 994 mSDtfsCounter, 947 mSDsluCounter, 1583 mSDsCounter, 0 mSdLazyCounter, 486 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 965 SdHoareTripleChecker+Valid, 2577 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 00:38:15,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [965 Valid, 2577 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 486 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-16 00:38:15,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2193 states. [2021-12-16 00:38:15,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2193 to 2193. [2021-12-16 00:38:15,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2193 states, 1760 states have (on average 1.6448863636363635) internal successors, (2895), 1794 states have internal predecessors, (2895), 327 states have call successors, (327), 102 states have call predecessors, (327), 105 states have return successors, (367), 312 states have call predecessors, (367), 321 states have call successors, (367) [2021-12-16 00:38:15,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2193 states to 2193 states and 3589 transitions. [2021-12-16 00:38:15,863 INFO L78 Accepts]: Start accepts. Automaton has 2193 states and 3589 transitions. Word has length 153 [2021-12-16 00:38:15,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:38:15,863 INFO L470 AbstractCegarLoop]: Abstraction has 2193 states and 3589 transitions. [2021-12-16 00:38:15,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-12-16 00:38:15,864 INFO L276 IsEmpty]: Start isEmpty. Operand 2193 states and 3589 transitions. [2021-12-16 00:38:15,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-12-16 00:38:15,868 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:38:15,868 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-16 00:38:15,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-16 00:38:16,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:38:16,087 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:38:16,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:38:16,088 INFO L85 PathProgramCache]: Analyzing trace with hash -9135386, now seen corresponding path program 1 times [2021-12-16 00:38:16,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:38:16,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703504583] [2021-12-16 00:38:16,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:38:16,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:38:16,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:16,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 00:38:16,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:16,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-16 00:38:16,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:16,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-16 00:38:16,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:16,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:38:16,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:16,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 00:38:16,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:16,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-16 00:38:16,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:16,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-16 00:38:16,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:16,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:38:16,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:16,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:38:16,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:16,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-16 00:38:16,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:16,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-16 00:38:16,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:16,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:38:16,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:16,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:38:16,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:16,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-16 00:38:16,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:16,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-16 00:38:16,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:16,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2021-12-16 00:38:16,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:16,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2021-12-16 00:38:16,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:16,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2021-12-16 00:38:16,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:16,357 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-16 00:38:16,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:38:16,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703504583] [2021-12-16 00:38:16,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703504583] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:38:16,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523828209] [2021-12-16 00:38:16,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:38:16,357 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:38:16,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:38:16,358 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:38:16,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-16 00:38:16,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:16,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 1640 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 00:38:16,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:38:16,794 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-16 00:38:16,794 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:38:16,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523828209] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:38:16,794 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 00:38:16,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2021-12-16 00:38:16,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962336489] [2021-12-16 00:38:16,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:38:16,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 00:38:16,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:38:16,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 00:38:16,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-16 00:38:16,796 INFO L87 Difference]: Start difference. First operand 2193 states and 3589 transitions. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-12-16 00:38:17,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:38:17,216 INFO L93 Difference]: Finished difference Result 4264 states and 7090 transitions. [2021-12-16 00:38:17,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 00:38:17,218 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 155 [2021-12-16 00:38:17,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:38:17,227 INFO L225 Difference]: With dead ends: 4264 [2021-12-16 00:38:17,227 INFO L226 Difference]: Without dead ends: 2225 [2021-12-16 00:38:17,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-12-16 00:38:17,236 INFO L933 BasicCegarLoop]: 994 mSDtfsCounter, 962 mSDsluCounter, 1583 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 980 SdHoareTripleChecker+Valid, 2577 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 00:38:17,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [980 Valid, 2577 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 00:38:17,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2225 states. [2021-12-16 00:38:17,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2225 to 2225. [2021-12-16 00:38:17,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2225 states, 1788 states have (on average 1.645973154362416) internal successors, (2943), 1822 states have internal predecessors, (2943), 327 states have call successors, (327), 106 states have call predecessors, (327), 109 states have return successors, (371), 312 states have call predecessors, (371), 321 states have call successors, (371) [2021-12-16 00:38:17,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2225 states to 2225 states and 3641 transitions. [2021-12-16 00:38:17,315 INFO L78 Accepts]: Start accepts. Automaton has 2225 states and 3641 transitions. Word has length 155 [2021-12-16 00:38:17,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:38:17,316 INFO L470 AbstractCegarLoop]: Abstraction has 2225 states and 3641 transitions. [2021-12-16 00:38:17,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-12-16 00:38:17,316 INFO L276 IsEmpty]: Start isEmpty. Operand 2225 states and 3641 transitions. [2021-12-16 00:38:17,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-16 00:38:17,320 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:38:17,320 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:38:17,338 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-12-16 00:38:17,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:38:17,535 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:38:17,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:38:17,536 INFO L85 PathProgramCache]: Analyzing trace with hash 514628356, now seen corresponding path program 1 times [2021-12-16 00:38:17,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:38:17,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913910969] [2021-12-16 00:38:17,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:38:17,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:38:17,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:17,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 00:38:17,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:17,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-16 00:38:17,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:17,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-16 00:38:17,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:17,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:38:17,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:17,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 00:38:17,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:17,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-16 00:38:17,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:17,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-16 00:38:17,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:17,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:38:17,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:17,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:38:17,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:17,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-16 00:38:17,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:17,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-16 00:38:17,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:17,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:38:17,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:17,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:38:17,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:17,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-16 00:38:17,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:17,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-16 00:38:17,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:17,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-16 00:38:17,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:17,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-12-16 00:38:17,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:17,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2021-12-16 00:38:17,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:17,783 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-16 00:38:17,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:38:17,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913910969] [2021-12-16 00:38:17,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913910969] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:38:17,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437861112] [2021-12-16 00:38:17,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:38:17,783 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:38:17,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:38:17,784 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:38:17,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-16 00:38:17,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:17,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 1642 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 00:38:18,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:38:18,216 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-16 00:38:18,216 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:38:18,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437861112] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:38:18,216 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 00:38:18,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2021-12-16 00:38:18,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446554824] [2021-12-16 00:38:18,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:38:18,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 00:38:18,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:38:18,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 00:38:18,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-16 00:38:18,217 INFO L87 Difference]: Start difference. First operand 2225 states and 3641 transitions. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-12-16 00:38:18,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:38:18,613 INFO L93 Difference]: Finished difference Result 4328 states and 7182 transitions. [2021-12-16 00:38:18,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 00:38:18,616 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 157 [2021-12-16 00:38:18,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:38:18,625 INFO L225 Difference]: With dead ends: 4328 [2021-12-16 00:38:18,625 INFO L226 Difference]: Without dead ends: 2257 [2021-12-16 00:38:18,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-12-16 00:38:18,632 INFO L933 BasicCegarLoop]: 994 mSDtfsCounter, 939 mSDsluCounter, 1583 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 957 SdHoareTripleChecker+Valid, 2577 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 00:38:18,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [957 Valid, 2577 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 00:38:18,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2257 states. [2021-12-16 00:38:18,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2257 to 2257. [2021-12-16 00:38:18,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2257 states, 1816 states have (on average 1.6470264317180616) internal successors, (2991), 1850 states have internal predecessors, (2991), 327 states have call successors, (327), 110 states have call predecessors, (327), 113 states have return successors, (375), 312 states have call predecessors, (375), 321 states have call successors, (375) [2021-12-16 00:38:18,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2257 states to 2257 states and 3693 transitions. [2021-12-16 00:38:18,687 INFO L78 Accepts]: Start accepts. Automaton has 2257 states and 3693 transitions. Word has length 157 [2021-12-16 00:38:18,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:38:18,687 INFO L470 AbstractCegarLoop]: Abstraction has 2257 states and 3693 transitions. [2021-12-16 00:38:18,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-12-16 00:38:18,687 INFO L276 IsEmpty]: Start isEmpty. Operand 2257 states and 3693 transitions. [2021-12-16 00:38:18,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-12-16 00:38:18,691 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:38:18,692 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:38:18,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-12-16 00:38:18,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:38:18,907 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:38:18,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:38:18,907 INFO L85 PathProgramCache]: Analyzing trace with hash -2054229210, now seen corresponding path program 1 times [2021-12-16 00:38:18,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:38:18,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677936830] [2021-12-16 00:38:18,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:38:18,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:38:18,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:18,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 00:38:18,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:18,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-16 00:38:18,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:18,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-16 00:38:18,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:19,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:38:19,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:19,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 00:38:19,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:19,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-16 00:38:19,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:19,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-16 00:38:19,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:19,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:38:19,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:19,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:38:19,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:19,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-16 00:38:19,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:19,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-16 00:38:19,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:19,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:38:19,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:19,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:38:19,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:19,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-16 00:38:19,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:19,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-16 00:38:19,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:19,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-12-16 00:38:19,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:19,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-16 00:38:19,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:19,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2021-12-16 00:38:19,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:19,168 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-16 00:38:19,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:38:19,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677936830] [2021-12-16 00:38:19,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677936830] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:38:19,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179225708] [2021-12-16 00:38:19,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:38:19,168 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:38:19,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:38:19,169 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:38:19,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-16 00:38:19,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:19,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 1644 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-16 00:38:19,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:38:19,579 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-16 00:38:19,579 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:38:19,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179225708] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:38:19,580 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 00:38:19,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 7 [2021-12-16 00:38:19,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977171375] [2021-12-16 00:38:19,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:38:19,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 00:38:19,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:38:19,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 00:38:19,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-16 00:38:19,583 INFO L87 Difference]: Start difference. First operand 2257 states and 3693 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 1 states have call predecessors, (17), 2 states have call successors, (17) [2021-12-16 00:38:19,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:38:19,657 INFO L93 Difference]: Finished difference Result 4491 states and 7366 transitions. [2021-12-16 00:38:19,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 00:38:19,657 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 1 states have call predecessors, (17), 2 states have call successors, (17) Word has length 159 [2021-12-16 00:38:19,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:38:19,667 INFO L225 Difference]: With dead ends: 4491 [2021-12-16 00:38:19,668 INFO L226 Difference]: Without dead ends: 2222 [2021-12-16 00:38:19,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 191 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-16 00:38:19,675 INFO L933 BasicCegarLoop]: 1012 mSDtfsCounter, 13 mSDsluCounter, 2015 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 3027 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 00:38:19,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 3027 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 00:38:19,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2222 states. [2021-12-16 00:38:19,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2222 to 2222. [2021-12-16 00:38:19,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2222 states, 1784 states have (on average 1.6378923766816142) internal successors, (2922), 1816 states have internal predecessors, (2922), 326 states have call successors, (326), 110 states have call predecessors, (326), 111 states have return successors, (372), 311 states have call predecessors, (372), 320 states have call successors, (372) [2021-12-16 00:38:19,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2222 states to 2222 states and 3620 transitions. [2021-12-16 00:38:19,727 INFO L78 Accepts]: Start accepts. Automaton has 2222 states and 3620 transitions. Word has length 159 [2021-12-16 00:38:19,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:38:19,727 INFO L470 AbstractCegarLoop]: Abstraction has 2222 states and 3620 transitions. [2021-12-16 00:38:19,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 1 states have call predecessors, (17), 2 states have call successors, (17) [2021-12-16 00:38:19,728 INFO L276 IsEmpty]: Start isEmpty. Operand 2222 states and 3620 transitions. [2021-12-16 00:38:19,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-16 00:38:19,732 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:38:19,732 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:38:19,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-12-16 00:38:19,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:38:19,947 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:38:19,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:38:19,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1837347117, now seen corresponding path program 1 times [2021-12-16 00:38:19,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:38:19,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169768854] [2021-12-16 00:38:19,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:38:19,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:38:19,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:19,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 00:38:19,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:20,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-16 00:38:20,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:20,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-16 00:38:20,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:20,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:38:20,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:20,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 00:38:20,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:20,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-16 00:38:20,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:20,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-16 00:38:20,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:20,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:38:20,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:20,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:38:20,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:20,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-16 00:38:20,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:20,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-16 00:38:20,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:20,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:38:20,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:20,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:38:20,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:20,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-16 00:38:20,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:20,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-16 00:38:20,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:20,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2021-12-16 00:38:20,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:20,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-16 00:38:20,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:20,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-12-16 00:38:20,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:20,248 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-16 00:38:20,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:38:20,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169768854] [2021-12-16 00:38:20,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169768854] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:38:20,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829612800] [2021-12-16 00:38:20,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:38:20,250 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:38:20,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:38:20,251 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:38:20,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-16 00:38:20,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:20,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 1642 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-16 00:38:20,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:38:20,687 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-16 00:38:20,688 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:38:20,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829612800] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:38:20,688 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 00:38:20,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 12 [2021-12-16 00:38:20,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326293952] [2021-12-16 00:38:20,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:38:20,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 00:38:20,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:38:20,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 00:38:20,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-12-16 00:38:20,689 INFO L87 Difference]: Start difference. First operand 2222 states and 3620 transitions. Second operand has 7 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 3 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 3 states have call successors, (17) [2021-12-16 00:38:20,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:38:20,802 INFO L93 Difference]: Finished difference Result 4468 states and 7276 transitions. [2021-12-16 00:38:20,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 00:38:20,802 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 3 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 3 states have call successors, (17) Word has length 160 [2021-12-16 00:38:20,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:38:20,815 INFO L225 Difference]: With dead ends: 4468 [2021-12-16 00:38:20,815 INFO L226 Difference]: Without dead ends: 2263 [2021-12-16 00:38:20,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 191 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-12-16 00:38:20,822 INFO L933 BasicCegarLoop]: 1022 mSDtfsCounter, 138 mSDsluCounter, 4942 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 5964 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 00:38:20,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 5964 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 00:38:20,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2263 states. [2021-12-16 00:38:20,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2263 to 2215. [2021-12-16 00:38:20,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2215 states, 1777 states have (on average 1.6353404614518852) internal successors, (2906), 1809 states have internal predecessors, (2906), 326 states have call successors, (326), 110 states have call predecessors, (326), 111 states have return successors, (372), 311 states have call predecessors, (372), 320 states have call successors, (372) [2021-12-16 00:38:20,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2215 states to 2215 states and 3604 transitions. [2021-12-16 00:38:20,878 INFO L78 Accepts]: Start accepts. Automaton has 2215 states and 3604 transitions. Word has length 160 [2021-12-16 00:38:20,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:38:20,878 INFO L470 AbstractCegarLoop]: Abstraction has 2215 states and 3604 transitions. [2021-12-16 00:38:20,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 3 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 3 states have call successors, (17) [2021-12-16 00:38:20,879 INFO L276 IsEmpty]: Start isEmpty. Operand 2215 states and 3604 transitions. [2021-12-16 00:38:20,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-16 00:38:20,883 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:38:20,883 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:38:20,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-12-16 00:38:21,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:38:21,102 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:38:21,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:38:21,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1903901320, now seen corresponding path program 1 times [2021-12-16 00:38:21,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:38:21,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187535965] [2021-12-16 00:38:21,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:38:21,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:38:21,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:21,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 00:38:21,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:21,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-16 00:38:21,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:21,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-16 00:38:21,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:21,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:38:21,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:21,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 00:38:21,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:21,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-16 00:38:21,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:21,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-16 00:38:21,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:21,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:38:21,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:21,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:38:21,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:21,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-16 00:38:21,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:21,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-16 00:38:21,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:21,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:38:21,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:21,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:38:21,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:21,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-16 00:38:21,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:21,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-16 00:38:21,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:21,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-16 00:38:21,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:21,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-12-16 00:38:21,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:21,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-16 00:38:21,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:21,370 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-16 00:38:21,370 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:38:21,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187535965] [2021-12-16 00:38:21,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187535965] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:38:21,370 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 00:38:21,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 00:38:21,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289527521] [2021-12-16 00:38:21,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:38:21,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 00:38:21,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:38:21,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 00:38:21,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-16 00:38:21,373 INFO L87 Difference]: Start difference. First operand 2215 states and 3604 transitions. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (19), 5 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-12-16 00:38:25,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:38:25,682 INFO L93 Difference]: Finished difference Result 5158 states and 8453 transitions. [2021-12-16 00:38:25,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-16 00:38:25,683 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (19), 5 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 161 [2021-12-16 00:38:25,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:38:25,694 INFO L225 Difference]: With dead ends: 5158 [2021-12-16 00:38:25,694 INFO L226 Difference]: Without dead ends: 3045 [2021-12-16 00:38:25,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-12-16 00:38:25,699 INFO L933 BasicCegarLoop]: 979 mSDtfsCounter, 1752 mSDsluCounter, 1319 mSDsCounter, 0 mSdLazyCounter, 2608 mSolverCounterSat, 499 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1853 SdHoareTripleChecker+Valid, 2298 SdHoareTripleChecker+Invalid, 3107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 499 IncrementalHoareTripleChecker+Valid, 2608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-12-16 00:38:25,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1853 Valid, 2298 Invalid, 3107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [499 Valid, 2608 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2021-12-16 00:38:25,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3045 states. [2021-12-16 00:38:25,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3045 to 2264. [2021-12-16 00:38:25,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2264 states, 1817 states have (on average 1.6312603192074848) internal successors, (2964), 1849 states have internal predecessors, (2964), 332 states have call successors, (332), 110 states have call predecessors, (332), 114 states have return successors, (384), 318 states have call predecessors, (384), 326 states have call successors, (384) [2021-12-16 00:38:25,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2264 states to 2264 states and 3680 transitions. [2021-12-16 00:38:25,897 INFO L78 Accepts]: Start accepts. Automaton has 2264 states and 3680 transitions. Word has length 161 [2021-12-16 00:38:25,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:38:25,897 INFO L470 AbstractCegarLoop]: Abstraction has 2264 states and 3680 transitions. [2021-12-16 00:38:25,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (19), 5 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-12-16 00:38:25,897 INFO L276 IsEmpty]: Start isEmpty. Operand 2264 states and 3680 transitions. [2021-12-16 00:38:25,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-16 00:38:25,901 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:38:25,902 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:38:25,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-16 00:38:25,902 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:38:25,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:38:25,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1853854388, now seen corresponding path program 1 times [2021-12-16 00:38:25,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:38:25,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361845966] [2021-12-16 00:38:25,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:38:25,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:38:25,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:25,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 00:38:25,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:25,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-16 00:38:25,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:25,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-16 00:38:25,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:25,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:38:25,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:26,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 00:38:26,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:26,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-16 00:38:26,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:26,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-16 00:38:26,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:26,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:38:26,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:26,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:38:26,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:26,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-16 00:38:26,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:26,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-16 00:38:26,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:26,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:38:26,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:26,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:38:26,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:26,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-16 00:38:26,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:26,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-16 00:38:26,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:26,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-16 00:38:26,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:26,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-12-16 00:38:26,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:26,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-16 00:38:26,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:26,152 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-16 00:38:26,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:38:26,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361845966] [2021-12-16 00:38:26,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361845966] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:38:26,153 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 00:38:26,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 00:38:26,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875875447] [2021-12-16 00:38:26,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:38:26,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 00:38:26,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:38:26,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 00:38:26,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-16 00:38:26,154 INFO L87 Difference]: Start difference. First operand 2264 states and 3680 transitions. Second operand has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (19), 5 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-12-16 00:38:30,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:38:30,235 INFO L93 Difference]: Finished difference Result 5196 states and 8512 transitions. [2021-12-16 00:38:30,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 00:38:30,235 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (19), 5 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 161 [2021-12-16 00:38:30,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:38:30,247 INFO L225 Difference]: With dead ends: 5196 [2021-12-16 00:38:30,247 INFO L226 Difference]: Without dead ends: 2940 [2021-12-16 00:38:30,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-12-16 00:38:30,252 INFO L933 BasicCegarLoop]: 983 mSDtfsCounter, 2196 mSDsluCounter, 1241 mSDsCounter, 0 mSdLazyCounter, 2600 mSolverCounterSat, 681 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2297 SdHoareTripleChecker+Valid, 2224 SdHoareTripleChecker+Invalid, 3281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 681 IncrementalHoareTripleChecker+Valid, 2600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-12-16 00:38:30,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2297 Valid, 2224 Invalid, 3281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [681 Valid, 2600 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-12-16 00:38:30,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2940 states. [2021-12-16 00:38:30,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2940 to 2236. [2021-12-16 00:38:30,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2236 states, 1792 states have (on average 1.6283482142857142) internal successors, (2918), 1822 states have internal predecessors, (2918), 331 states have call successors, (331), 110 states have call predecessors, (331), 112 states have return successors, (381), 317 states have call predecessors, (381), 325 states have call successors, (381) [2021-12-16 00:38:30,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2236 states to 2236 states and 3630 transitions. [2021-12-16 00:38:30,387 INFO L78 Accepts]: Start accepts. Automaton has 2236 states and 3630 transitions. Word has length 161 [2021-12-16 00:38:30,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:38:30,388 INFO L470 AbstractCegarLoop]: Abstraction has 2236 states and 3630 transitions. [2021-12-16 00:38:30,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (19), 5 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-12-16 00:38:30,388 INFO L276 IsEmpty]: Start isEmpty. Operand 2236 states and 3630 transitions. [2021-12-16 00:38:30,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-12-16 00:38:30,391 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:38:30,391 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:38:30,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-16 00:38:30,391 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:38:30,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:38:30,392 INFO L85 PathProgramCache]: Analyzing trace with hash -243423905, now seen corresponding path program 1 times [2021-12-16 00:38:30,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:38:30,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904915253] [2021-12-16 00:38:30,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:38:30,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:38:30,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:30,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 00:38:30,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:30,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-16 00:38:30,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:30,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-16 00:38:30,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:30,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:38:30,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:30,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 00:38:30,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:30,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-16 00:38:30,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:30,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-16 00:38:30,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:30,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:38:30,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:30,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:38:30,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:30,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-16 00:38:30,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:30,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-16 00:38:30,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:30,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:38:30,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:30,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:38:30,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:30,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-16 00:38:30,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:30,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-16 00:38:30,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:30,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2021-12-16 00:38:30,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:30,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-16 00:38:30,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:30,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2021-12-16 00:38:30,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:30,777 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-16 00:38:30,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:38:30,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904915253] [2021-12-16 00:38:30,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904915253] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:38:30,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717218850] [2021-12-16 00:38:30,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:38:30,778 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:38:30,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:38:30,779 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:38:30,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-16 00:38:30,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:30,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 1652 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-16 00:38:31,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:38:31,249 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-16 00:38:31,249 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:38:31,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717218850] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:38:31,249 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 00:38:31,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [14] total 18 [2021-12-16 00:38:31,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146249011] [2021-12-16 00:38:31,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:38:31,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 00:38:31,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:38:31,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 00:38:31,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-12-16 00:38:31,251 INFO L87 Difference]: Start difference. First operand 2236 states and 3630 transitions. Second operand has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 6 states have call successors, (20), 5 states have call predecessors, (20), 5 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2021-12-16 00:38:32,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:38:32,856 INFO L93 Difference]: Finished difference Result 4421 states and 7201 transitions. [2021-12-16 00:38:32,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 00:38:32,856 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 6 states have call successors, (20), 5 states have call predecessors, (20), 5 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) Word has length 162 [2021-12-16 00:38:32,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:38:32,867 INFO L225 Difference]: With dead ends: 4421 [2021-12-16 00:38:32,868 INFO L226 Difference]: Without dead ends: 2276 [2021-12-16 00:38:32,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-12-16 00:38:32,873 INFO L933 BasicCegarLoop]: 1342 mSDtfsCounter, 1886 mSDsluCounter, 805 mSDsCounter, 0 mSdLazyCounter, 2281 mSolverCounterSat, 433 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2008 SdHoareTripleChecker+Valid, 2147 SdHoareTripleChecker+Invalid, 2714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 433 IncrementalHoareTripleChecker+Valid, 2281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-16 00:38:32,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2008 Valid, 2147 Invalid, 2714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [433 Valid, 2281 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-16 00:38:32,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2276 states. [2021-12-16 00:38:33,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2276 to 2136. [2021-12-16 00:38:33,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2136 states, 1666 states have (on average 1.60984393757503) internal successors, (2682), 1716 states have internal predecessors, (2682), 365 states have call successors, (365), 100 states have call predecessors, (365), 104 states have return successors, (413), 344 states have call predecessors, (413), 359 states have call successors, (413) [2021-12-16 00:38:33,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2136 states to 2136 states and 3460 transitions. [2021-12-16 00:38:33,042 INFO L78 Accepts]: Start accepts. Automaton has 2136 states and 3460 transitions. Word has length 162 [2021-12-16 00:38:33,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:38:33,042 INFO L470 AbstractCegarLoop]: Abstraction has 2136 states and 3460 transitions. [2021-12-16 00:38:33,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 6 states have call successors, (20), 5 states have call predecessors, (20), 5 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2021-12-16 00:38:33,042 INFO L276 IsEmpty]: Start isEmpty. Operand 2136 states and 3460 transitions. [2021-12-16 00:38:33,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-12-16 00:38:33,046 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:38:33,046 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:38:33,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-12-16 00:38:33,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-16 00:38:33,259 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:38:33,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:38:33,260 INFO L85 PathProgramCache]: Analyzing trace with hash 488543521, now seen corresponding path program 1 times [2021-12-16 00:38:33,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:38:33,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077714405] [2021-12-16 00:38:33,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:38:33,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:38:33,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:33,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 00:38:33,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:33,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-16 00:38:33,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:33,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-16 00:38:33,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:33,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:38:33,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:33,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 00:38:33,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:33,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-16 00:38:33,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:33,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-16 00:38:33,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:33,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:38:33,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:33,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:38:33,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:33,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-16 00:38:33,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:33,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-16 00:38:33,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:33,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:38:33,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:33,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:38:33,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:33,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-16 00:38:33,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:33,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-16 00:38:33,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:33,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2021-12-16 00:38:33,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:33,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-16 00:38:33,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:33,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2021-12-16 00:38:33,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:33,613 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-16 00:38:33,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:38:33,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077714405] [2021-12-16 00:38:33,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077714405] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:38:33,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016578072] [2021-12-16 00:38:33,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:38:33,614 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:38:33,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:38:33,628 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:38:33,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-16 00:38:33,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:33,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 1655 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-16 00:38:33,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:38:34,162 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-16 00:38:34,162 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:38:34,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016578072] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:38:34,162 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 00:38:34,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [14] total 19 [2021-12-16 00:38:34,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003059396] [2021-12-16 00:38:34,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:38:34,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 00:38:34,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:38:34,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 00:38:34,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-12-16 00:38:34,163 INFO L87 Difference]: Start difference. First operand 2136 states and 3460 transitions. Second operand has 7 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 4 states have call successors, (19), 4 states have call predecessors, (19), 5 states have return successors, (17), 5 states have call predecessors, (17), 4 states have call successors, (17) [2021-12-16 00:38:38,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:38:38,063 INFO L93 Difference]: Finished difference Result 8893 states and 14688 transitions. [2021-12-16 00:38:38,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-16 00:38:38,064 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 4 states have call successors, (19), 4 states have call predecessors, (19), 5 states have return successors, (17), 5 states have call predecessors, (17), 4 states have call successors, (17) Word has length 162 [2021-12-16 00:38:38,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:38:38,091 INFO L225 Difference]: With dead ends: 8893 [2021-12-16 00:38:38,091 INFO L226 Difference]: Without dead ends: 6847 [2021-12-16 00:38:38,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=119, Invalid=873, Unknown=0, NotChecked=0, Total=992 [2021-12-16 00:38:38,102 INFO L933 BasicCegarLoop]: 1810 mSDtfsCounter, 3338 mSDsluCounter, 1782 mSDsCounter, 0 mSdLazyCounter, 6304 mSolverCounterSat, 922 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3452 SdHoareTripleChecker+Valid, 3592 SdHoareTripleChecker+Invalid, 7226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 922 IncrementalHoareTripleChecker+Valid, 6304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-12-16 00:38:38,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3452 Valid, 3592 Invalid, 7226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [922 Valid, 6304 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-12-16 00:38:38,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6847 states. [2021-12-16 00:38:38,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6847 to 6427. [2021-12-16 00:38:38,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6427 states, 4950 states have (on average 1.5977777777777777) internal successors, (7909), 5105 states have internal predecessors, (7909), 1149 states have call successors, (1149), 276 states have call predecessors, (1149), 327 states have return successors, (1500), 1119 states have call predecessors, (1500), 1139 states have call successors, (1500) [2021-12-16 00:38:38,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6427 states to 6427 states and 10558 transitions. [2021-12-16 00:38:38,546 INFO L78 Accepts]: Start accepts. Automaton has 6427 states and 10558 transitions. Word has length 162 [2021-12-16 00:38:38,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:38:38,547 INFO L470 AbstractCegarLoop]: Abstraction has 6427 states and 10558 transitions. [2021-12-16 00:38:38,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 4 states have call successors, (19), 4 states have call predecessors, (19), 5 states have return successors, (17), 5 states have call predecessors, (17), 4 states have call successors, (17) [2021-12-16 00:38:38,547 INFO L276 IsEmpty]: Start isEmpty. Operand 6427 states and 10558 transitions. [2021-12-16 00:38:38,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-16 00:38:38,550 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:38:38,550 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:38:38,568 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-12-16 00:38:38,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-16 00:38:38,763 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:38:38,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:38:38,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1557155161, now seen corresponding path program 1 times [2021-12-16 00:38:38,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:38:38,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172854994] [2021-12-16 00:38:38,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:38:38,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:38:38,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:38,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 00:38:38,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:38,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-16 00:38:38,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:38,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-16 00:38:38,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:38,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:38:38,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:38,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 00:38:38,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:38,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-16 00:38:38,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:39,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-16 00:38:39,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:39,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:38:39,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:39,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:38:39,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:39,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-16 00:38:39,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:39,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-16 00:38:39,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:39,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:38:39,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:39,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:38:39,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:39,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-16 00:38:39,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:39,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-16 00:38:39,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:39,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 00:38:39,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:39,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-16 00:38:39,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:39,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-12-16 00:38:39,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:39,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2021-12-16 00:38:39,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:38:39,073 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-16 00:38:39,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:38:39,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172854994] [2021-12-16 00:38:39,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172854994] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:38:39,073 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 00:38:39,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-16 00:38:39,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750187731] [2021-12-16 00:38:39,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:38:39,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-16 00:38:39,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:38:39,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-16 00:38:39,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-12-16 00:38:39,076 INFO L87 Difference]: Start difference. First operand 6427 states and 10558 transitions. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 7 states have internal predecessors, (97), 4 states have call successors, (20), 6 states have call predecessors, (20), 4 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18)