./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/id_o100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 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/recursive-simple/id_o100.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 a9f3959f9eef72d5f7423aa1eb092ce144135b5ae33d5bb31037a0c7e99b1293 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 17:32:26,408 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 17:32:26,410 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 17:32:26,437 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 17:32:26,438 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 17:32:26,439 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 17:32:26,440 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 17:32:26,441 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 17:32:26,443 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 17:32:26,444 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 17:32:26,445 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 17:32:26,446 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 17:32:26,446 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 17:32:26,447 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 17:32:26,448 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 17:32:26,449 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 17:32:26,450 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 17:32:26,451 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 17:32:26,453 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 17:32:26,454 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 17:32:26,456 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 17:32:26,457 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 17:32:26,458 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 17:32:26,459 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 17:32:26,460 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 17:32:26,462 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 17:32:26,463 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 17:32:26,463 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 17:32:26,464 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 17:32:26,464 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 17:32:26,465 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 17:32:26,465 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 17:32:26,466 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 17:32:26,467 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 17:32:26,467 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 17:32:26,468 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 17:32:26,469 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 17:32:26,469 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 17:32:26,469 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 17:32:26,470 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 17:32:26,470 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 17:32:26,471 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 17:32:26,472 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 17:32:26,492 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 17:32:26,492 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 17:32:26,493 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 17:32:26,493 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 17:32:26,494 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 17:32:26,494 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 17:32:26,494 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 17:32:26,495 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 17:32:26,495 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 17:32:26,495 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 17:32:26,495 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 17:32:26,496 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 17:32:26,496 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 17:32:26,496 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 17:32:26,496 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 17:32:26,497 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 17:32:26,497 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 17:32:26,497 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 17:32:26,497 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 17:32:26,498 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 17:32:26,498 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 17:32:26,498 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 17:32:26,498 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 17:32:26,499 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 17:32:26,499 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 17:32:26,499 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 17:32:26,499 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 17:32:26,500 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 17:32:26,500 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 17:32:26,500 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 17:32:26,500 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 17:32:26,501 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 17:32:26,501 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 17:32:26,501 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a9f3959f9eef72d5f7423aa1eb092ce144135b5ae33d5bb31037a0c7e99b1293 [2022-07-19 17:32:26,740 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 17:32:26,761 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 17:32:26,763 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 17:32:26,764 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 17:32:26,765 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 17:32:26,766 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/id_o100.c [2022-07-19 17:32:26,831 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/384f2b789/73d9ca523771401fbadc64c8c779d0c7/FLAG9ac205821 [2022-07-19 17:32:27,235 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 17:32:27,235 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/id_o100.c [2022-07-19 17:32:27,239 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/384f2b789/73d9ca523771401fbadc64c8c779d0c7/FLAG9ac205821 [2022-07-19 17:32:27,654 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/384f2b789/73d9ca523771401fbadc64c8c779d0c7 [2022-07-19 17:32:27,656 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 17:32:27,657 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 17:32:27,659 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 17:32:27,659 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 17:32:27,661 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 17:32:27,662 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 05:32:27" (1/1) ... [2022-07-19 17:32:27,664 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48d058b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:32:27, skipping insertion in model container [2022-07-19 17:32:27,664 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 05:32:27" (1/1) ... [2022-07-19 17:32:27,670 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 17:32:27,681 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 17:32:27,883 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/recursive-simple/id_o100.c[518,531] [2022-07-19 17:32:27,886 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 17:32:27,895 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 17:32:27,911 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/recursive-simple/id_o100.c[518,531] [2022-07-19 17:32:27,912 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 17:32:27,922 INFO L208 MainTranslator]: Completed translation [2022-07-19 17:32:27,922 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:32:27 WrapperNode [2022-07-19 17:32:27,922 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 17:32:27,925 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 17:32:27,925 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 17:32:27,925 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 17:32:27,931 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:32:27" (1/1) ... [2022-07-19 17:32:27,936 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:32:27" (1/1) ... [2022-07-19 17:32:27,949 INFO L137 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 19 [2022-07-19 17:32:27,950 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 17:32:27,951 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 17:32:27,951 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 17:32:27,951 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 17:32:27,958 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:32:27" (1/1) ... [2022-07-19 17:32:27,958 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:32:27" (1/1) ... [2022-07-19 17:32:27,960 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:32:27" (1/1) ... [2022-07-19 17:32:27,960 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:32:27" (1/1) ... [2022-07-19 17:32:27,963 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:32:27" (1/1) ... [2022-07-19 17:32:27,965 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:32:27" (1/1) ... [2022-07-19 17:32:27,966 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:32:27" (1/1) ... [2022-07-19 17:32:27,971 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 17:32:27,972 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 17:32:27,973 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 17:32:27,973 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 17:32:27,974 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:32:27" (1/1) ... [2022-07-19 17:32:27,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 17:32:27,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:32:28,005 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-19 17:32:28,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-19 17:32:28,048 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 17:32:28,048 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 17:32:28,048 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 17:32:28,048 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 17:32:28,048 INFO L130 BoogieDeclarations]: Found specification of procedure id [2022-07-19 17:32:28,049 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2022-07-19 17:32:28,095 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 17:32:28,096 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 17:32:28,201 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 17:32:28,205 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 17:32:28,207 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-19 17:32:28,209 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 05:32:28 BoogieIcfgContainer [2022-07-19 17:32:28,210 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 17:32:28,211 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 17:32:28,213 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 17:32:28,216 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 17:32:28,216 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 05:32:27" (1/3) ... [2022-07-19 17:32:28,217 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a2203eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 05:32:28, skipping insertion in model container [2022-07-19 17:32:28,217 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:32:27" (2/3) ... [2022-07-19 17:32:28,218 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a2203eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 05:32:28, skipping insertion in model container [2022-07-19 17:32:28,218 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 05:32:28" (3/3) ... [2022-07-19 17:32:28,219 INFO L111 eAbstractionObserver]: Analyzing ICFG id_o100.c [2022-07-19 17:32:28,231 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 17:32:28,232 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 17:32:28,284 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 17:32:28,291 INFO L357 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@381858, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@623258ef [2022-07-19 17:32:28,292 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 17:32:28,295 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 17:32:28,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-19 17:32:28,309 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:32:28,310 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:32:28,311 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:32:28,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:32:28,317 INFO L85 PathProgramCache]: Analyzing trace with hash -358017204, now seen corresponding path program 1 times [2022-07-19 17:32:28,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:32:28,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586658890] [2022-07-19 17:32:28,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:32:28,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:32:28,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:32:28,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:32:28,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:32:28,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 17:32:28,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:32:28,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586658890] [2022-07-19 17:32:28,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586658890] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:32:28,589 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 17:32:28,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 17:32:28,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443726473] [2022-07-19 17:32:28,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:32:28,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 17:32:28,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:32:28,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 17:32:28,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 17:32:28,626 INFO L87 Difference]: Start difference. First operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-19 17:32:28,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:32:28,696 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2022-07-19 17:32:28,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 17:32:28,699 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2022-07-19 17:32:28,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:32:28,706 INFO L225 Difference]: With dead ends: 28 [2022-07-19 17:32:28,707 INFO L226 Difference]: Without dead ends: 15 [2022-07-19 17:32:28,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 17:32:28,716 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 3 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 17:32:28,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 53 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 17:32:28,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-07-19 17:32:28,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-07-19 17:32:28,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 11 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-19 17:32:28,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-07-19 17:32:28,754 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2022-07-19 17:32:28,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:32:28,755 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-07-19 17:32:28,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-19 17:32:28,756 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-07-19 17:32:28,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-19 17:32:28,757 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:32:28,758 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:32:28,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 17:32:28,758 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:32:28,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:32:28,759 INFO L85 PathProgramCache]: Analyzing trace with hash 679465686, now seen corresponding path program 1 times [2022-07-19 17:32:28,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:32:28,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014499980] [2022-07-19 17:32:28,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:32:28,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:32:28,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:32:28,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:32:28,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:32:28,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:32:28,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:32:28,908 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 17:32:28,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:32:28,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014499980] [2022-07-19 17:32:28,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014499980] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:32:28,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275110544] [2022-07-19 17:32:28,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:32:28,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:32:28,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:32:28,915 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) [2022-07-19 17:32:28,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 17:32:28,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:32:28,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-19 17:32:28,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 17:32:29,136 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 17:32:29,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 17:32:29,284 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 17:32:29,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275110544] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 17:32:29,285 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 17:32:29,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-07-19 17:32:29,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381515497] [2022-07-19 17:32:29,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 17:32:29,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-19 17:32:29,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:32:29,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-19 17:32:29,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-07-19 17:32:29,290 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 9 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-19 17:32:29,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:32:29,343 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2022-07-19 17:32:29,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-19 17:32:29,344 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 9 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) Word has length 16 [2022-07-19 17:32:29,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:32:29,345 INFO L225 Difference]: With dead ends: 27 [2022-07-19 17:32:29,345 INFO L226 Difference]: Without dead ends: 21 [2022-07-19 17:32:29,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-07-19 17:32:29,347 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 17:32:29,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 95 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 17:32:29,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-07-19 17:32:29,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-07-19 17:32:29,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 15 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 17:32:29,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2022-07-19 17:32:29,356 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 16 [2022-07-19 17:32:29,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:32:29,356 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2022-07-19 17:32:29,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 9 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-19 17:32:29,356 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2022-07-19 17:32:29,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-19 17:32:29,357 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:32:29,358 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:32:29,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 17:32:29,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:32:29,572 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:32:29,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:32:29,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1769866774, now seen corresponding path program 2 times [2022-07-19 17:32:29,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:32:29,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415978245] [2022-07-19 17:32:29,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:32:29,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:32:29,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:32:29,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:32:29,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:32:29,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:32:29,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:32:29,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:32:29,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:32:29,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:32:29,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:32:29,803 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-19 17:32:29,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:32:29,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415978245] [2022-07-19 17:32:29,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415978245] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:32:29,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031798380] [2022-07-19 17:32:29,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 17:32:29,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:32:29,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:32:29,806 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) [2022-07-19 17:32:29,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 17:32:29,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 17:32:29,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 17:32:29,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-19 17:32:29,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 17:32:29,950 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-19 17:32:29,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 17:32:30,258 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-19 17:32:30,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031798380] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 17:32:30,258 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 17:32:30,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-07-19 17:32:30,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647966229] [2022-07-19 17:32:30,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 17:32:30,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-19 17:32:30,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:32:30,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-19 17:32:30,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-07-19 17:32:30,261 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 13 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (8), 8 states have call predecessors, (8), 1 states have call successors, (8) [2022-07-19 17:32:30,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:32:30,531 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2022-07-19 17:32:30,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-19 17:32:30,531 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 13 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (8), 8 states have call predecessors, (8), 1 states have call successors, (8) Word has length 28 [2022-07-19 17:32:30,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:32:30,532 INFO L225 Difference]: With dead ends: 39 [2022-07-19 17:32:30,533 INFO L226 Difference]: Without dead ends: 33 [2022-07-19 17:32:30,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2022-07-19 17:32:30,534 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 17:32:30,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 183 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 17:32:30,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-07-19 17:32:30,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-07-19 17:32:30,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 23 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (9), 8 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-19 17:32:30,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2022-07-19 17:32:30,541 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 28 [2022-07-19 17:32:30,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:32:30,541 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2022-07-19 17:32:30,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 13 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (8), 8 states have call predecessors, (8), 1 states have call successors, (8) [2022-07-19 17:32:30,541 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2022-07-19 17:32:30,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-19 17:32:30,542 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:32:30,543 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:32:30,586 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 17:32:30,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-07-19 17:32:30,764 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:32:30,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:32:30,764 INFO L85 PathProgramCache]: Analyzing trace with hash -626238314, now seen corresponding path program 3 times [2022-07-19 17:32:30,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:32:30,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476304450] [2022-07-19 17:32:30,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:32:30,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:32:30,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:32:30,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:32:30,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:32:30,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:32:30,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:32:30,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:32:31,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:32:31,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:32:31,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:32:31,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:32:31,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:32:31,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:32:31,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:32:31,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:32:31,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:32:31,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:32:31,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:32:31,295 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-07-19 17:32:31,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:32:31,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476304450] [2022-07-19 17:32:31,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476304450] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:32:31,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339382234] [2022-07-19 17:32:31,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 17:32:31,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:32:31,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:32:31,304 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) [2022-07-19 17:32:31,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 17:32:31,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-07-19 17:32:31,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 17:32:31,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-19 17:32:31,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 17:32:31,517 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-07-19 17:32:31,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 17:32:32,311 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-07-19 17:32:32,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339382234] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 17:32:32,312 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 17:32:32,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 37 [2022-07-19 17:32:32,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18051192] [2022-07-19 17:32:32,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 17:32:32,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-19 17:32:32,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:32:32,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-19 17:32:32,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1144, Unknown=0, NotChecked=0, Total=1332 [2022-07-19 17:32:32,315 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 37 states, 37 states have (on average 1.162162162162162) internal successors, (43), 21 states have internal predecessors, (43), 1 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (16), 16 states have call predecessors, (16), 1 states have call successors, (16) [2022-07-19 17:32:34,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:32:34,921 INFO L93 Difference]: Finished difference Result 63 states and 71 transitions. [2022-07-19 17:32:34,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-19 17:32:34,921 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.162162162162162) internal successors, (43), 21 states have internal predecessors, (43), 1 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (16), 16 states have call predecessors, (16), 1 states have call successors, (16) Word has length 52 [2022-07-19 17:32:34,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:32:34,923 INFO L225 Difference]: With dead ends: 63 [2022-07-19 17:32:34,923 INFO L226 Difference]: Without dead ends: 57 [2022-07-19 17:32:34,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=386, Invalid=1966, Unknown=0, NotChecked=0, Total=2352 [2022-07-19 17:32:34,925 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 17:32:34,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 353 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 17:32:34,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-07-19 17:32:34,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-07-19 17:32:34,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 39 states have internal predecessors, (39), 2 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (17), 16 states have call predecessors, (17), 2 states have call successors, (17) [2022-07-19 17:32:34,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2022-07-19 17:32:34,939 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 52 [2022-07-19 17:32:34,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:32:34,940 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2022-07-19 17:32:34,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.162162162162162) internal successors, (43), 21 states have internal predecessors, (43), 1 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (16), 16 states have call predecessors, (16), 1 states have call successors, (16) [2022-07-19 17:32:34,940 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2022-07-19 17:32:34,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-07-19 17:32:34,942 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:32:34,942 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:32:34,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 17:32:35,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:32:35,143 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:32:35,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:32:35,143 INFO L85 PathProgramCache]: Analyzing trace with hash 415287702, now seen corresponding path program 4 times [2022-07-19 17:32:35,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:32:35,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827380703] [2022-07-19 17:32:35,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:32:35,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:32:35,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:32:35,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:32:35,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:32:35,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:32:35,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:32:35,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:32:35,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:32:35,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:32:35,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:32:35,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:32:35,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:32:35,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:32:35,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:32:35,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:32:35,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:32:35,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:32:35,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:32:35,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:32:35,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:32:35,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:32:35,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:32:35,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:32:35,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:32:35,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:32:35,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:32:35,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:32:35,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:32:36,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:32:36,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:32:36,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:32:36,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:32:36,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:32:36,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:32:36,206 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2022-07-19 17:32:36,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:32:36,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827380703] [2022-07-19 17:32:36,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827380703] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:32:36,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501382686] [2022-07-19 17:32:36,206 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 17:32:36,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:32:36,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:32:36,209 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) [2022-07-19 17:32:36,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 17:32:36,263 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 17:32:36,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 17:32:36,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 68 conjunts are in the unsatisfiable core [2022-07-19 17:32:36,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 17:32:36,475 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2022-07-19 17:32:36,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 17:32:39,085 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2022-07-19 17:32:39,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501382686] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 17:32:39,086 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 17:32:39,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 69 [2022-07-19 17:32:39,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847525305] [2022-07-19 17:32:39,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 17:32:39,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-07-19 17:32:39,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:32:39,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-07-19 17:32:39,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=620, Invalid=4072, Unknown=0, NotChecked=0, Total=4692 [2022-07-19 17:32:39,091 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 69 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 37 states have internal predecessors, (75), 1 states have call successors, (2), 1 states have call predecessors, (2), 32 states have return successors, (32), 32 states have call predecessors, (32), 1 states have call successors, (32) [2022-07-19 17:33:02,474 WARN L233 SmtUtils]: Spent 15.38s on a formula simplification that was a NOOP. DAG size: 79 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-19 17:33:22,795 WARN L233 SmtUtils]: Spent 13.62s on a formula simplification that was a NOOP. DAG size: 77 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-19 17:33:35,963 WARN L233 SmtUtils]: Spent 6.81s on a formula simplification that was a NOOP. DAG size: 74 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-19 17:33:54,339 WARN L233 SmtUtils]: Spent 12.56s on a formula simplification that was a NOOP. DAG size: 72 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-19 17:34:04,774 WARN L233 SmtUtils]: Spent 5.72s on a formula simplification that was a NOOP. DAG size: 69 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-19 17:34:14,983 WARN L233 SmtUtils]: Spent 7.47s on a formula simplification that was a NOOP. DAG size: 67 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-19 17:34:30,731 WARN L233 SmtUtils]: Spent 5.45s on a formula simplification that was a NOOP. DAG size: 62 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-19 17:34:37,210 WARN L233 SmtUtils]: Spent 5.02s on a formula simplification that was a NOOP. DAG size: 59 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-19 17:35:03,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:35:03,003 INFO L93 Difference]: Finished difference Result 111 states and 127 transitions. [2022-07-19 17:35:03,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-07-19 17:35:03,004 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 37 states have internal predecessors, (75), 1 states have call successors, (2), 1 states have call predecessors, (2), 32 states have return successors, (32), 32 states have call predecessors, (32), 1 states have call successors, (32) Word has length 100 [2022-07-19 17:35:03,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:35:03,006 INFO L225 Difference]: With dead ends: 111 [2022-07-19 17:35:03,006 INFO L226 Difference]: Without dead ends: 105 [2022-07-19 17:35:03,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 197 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 743 ImplicationChecksByTransitivity, 145.1s TimeCoverageRelationStatistics Valid=1530, Invalid=7780, Unknown=2, NotChecked=0, Total=9312 [2022-07-19 17:35:03,009 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 0 mSDsluCounter, 943 mSDsCounter, 0 mSdLazyCounter, 1129 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 985 SdHoareTripleChecker+Invalid, 1159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-19 17:35:03,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 985 Invalid, 1159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1129 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-19 17:35:03,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-07-19 17:35:03,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2022-07-19 17:35:03,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 70 states have (on average 1.0142857142857142) internal successors, (71), 71 states have internal predecessors, (71), 2 states have call successors, (2), 1 states have call predecessors, (2), 32 states have return successors, (33), 32 states have call predecessors, (33), 2 states have call successors, (33) [2022-07-19 17:35:03,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2022-07-19 17:35:03,026 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 100 [2022-07-19 17:35:03,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:35:03,027 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2022-07-19 17:35:03,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 37 states have internal predecessors, (75), 1 states have call successors, (2), 1 states have call predecessors, (2), 32 states have return successors, (32), 32 states have call predecessors, (32), 1 states have call successors, (32) [2022-07-19 17:35:03,027 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2022-07-19 17:35:03,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2022-07-19 17:35:03,033 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:35:03,033 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:35:03,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 17:35:03,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:35:03,244 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:35:03,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:35:03,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1665704854, now seen corresponding path program 5 times [2022-07-19 17:35:03,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:35:03,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511817483] [2022-07-19 17:35:03,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:35:03,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:35:03,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:03,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:35:03,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:03,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:35:03,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:03,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:35:03,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:03,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:35:03,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:04,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:35:04,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:04,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:35:04,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:04,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:35:04,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:04,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:35:04,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:04,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:35:04,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:04,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:35:04,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:04,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:35:04,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:04,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:35:04,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:05,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:35:05,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:05,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:35:05,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:05,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:35:05,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:05,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:35:05,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:05,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:35:05,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:05,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:35:05,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:05,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:35:05,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:05,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:35:05,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:05,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:35:05,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:06,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:35:06,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:06,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:35:06,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:06,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:35:06,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:06,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:35:06,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:06,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:35:06,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:06,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:35:06,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:06,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:35:06,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:06,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:35:06,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:07,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:35:07,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:07,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:35:07,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:07,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:35:07,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:07,321 INFO L134 CoverageAnalysis]: Checked inductivity of 2914 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 1457 trivial. 0 not checked. [2022-07-19 17:35:07,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:35:07,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511817483] [2022-07-19 17:35:07,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511817483] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:35:07,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776665016] [2022-07-19 17:35:07,322 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 17:35:07,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:35:07,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:35:07,324 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) [2022-07-19 17:35:07,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 17:35:32,908 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) [2022-07-19 17:35:32,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 17:35:32,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 132 conjunts are in the unsatisfiable core [2022-07-19 17:35:32,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 17:35:33,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2914 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 1457 trivial. 0 not checked. [2022-07-19 17:35:33,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 17:35:42,497 INFO L134 CoverageAnalysis]: Checked inductivity of 2914 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 1457 trivial. 0 not checked. [2022-07-19 17:35:42,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776665016] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 17:35:42,498 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 17:35:42,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67, 67] total 133 [2022-07-19 17:35:42,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135105831] [2022-07-19 17:35:42,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 17:35:42,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2022-07-19 17:35:42,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:35:42,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2022-07-19 17:35:42,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2252, Invalid=15304, Unknown=0, NotChecked=0, Total=17556 [2022-07-19 17:35:42,505 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand has 133 states, 133 states have (on average 1.0451127819548873) internal successors, (139), 69 states have internal predecessors, (139), 1 states have call successors, (2), 1 states have call predecessors, (2), 64 states have return successors, (64), 64 states have call predecessors, (64), 1 states have call successors, (64)