./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem13_label40.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/eca-rers2012/Problem13_label40.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 5822f6dcecb89719be961a38493299a8716c4a47f733fff54adb51e7e48a109b --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 12:21:24,376 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 12:21:24,378 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 12:21:24,413 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 12:21:24,414 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 12:21:24,415 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 12:21:24,416 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 12:21:24,418 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 12:21:24,419 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 12:21:24,422 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 12:21:24,423 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 12:21:24,425 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 12:21:24,425 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 12:21:24,426 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 12:21:24,427 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 12:21:24,429 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 12:21:24,430 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 12:21:24,431 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 12:21:24,432 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 12:21:24,436 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 12:21:24,437 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 12:21:24,438 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 12:21:24,439 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 12:21:24,439 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 12:21:24,440 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 12:21:24,445 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 12:21:24,445 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 12:21:24,446 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 12:21:24,446 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 12:21:24,447 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 12:21:24,447 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 12:21:24,448 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 12:21:24,449 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 12:21:24,449 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 12:21:24,450 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 12:21:24,451 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 12:21:24,451 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 12:21:24,451 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 12:21:24,451 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 12:21:24,452 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 12:21:24,452 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 12:21:24,453 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 12:21:24,455 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 12:21:24,480 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 12:21:24,480 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 12:21:24,481 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 12:21:24,481 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 12:21:24,481 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 12:21:24,481 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 12:21:24,482 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 12:21:24,482 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 12:21:24,482 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 12:21:24,483 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 12:21:24,483 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 12:21:24,483 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 12:21:24,484 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 12:21:24,484 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 12:21:24,484 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 12:21:24,484 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 12:21:24,484 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 12:21:24,484 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 12:21:24,484 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 12:21:24,486 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 12:21:24,486 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 12:21:24,486 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 12:21:24,486 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 12:21:24,486 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 12:21:24,487 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 12:21:24,487 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 12:21:24,487 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 12:21:24,487 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 12:21:24,487 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 12:21:24,487 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 12:21:24,488 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 12:21:24,488 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 12:21:24,488 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 12:21:24,488 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5822f6dcecb89719be961a38493299a8716c4a47f733fff54adb51e7e48a109b [2022-07-19 12:21:24,684 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 12:21:24,701 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 12:21:24,703 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 12:21:24,704 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 12:21:24,705 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 12:21:24,705 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label40.c [2022-07-19 12:21:24,754 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af2b73e0f/2d695f2fe9b14eb3939fda9031d978f9/FLAG219679fe9 [2022-07-19 12:21:25,387 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 12:21:25,388 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label40.c [2022-07-19 12:21:25,411 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af2b73e0f/2d695f2fe9b14eb3939fda9031d978f9/FLAG219679fe9 [2022-07-19 12:21:25,547 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af2b73e0f/2d695f2fe9b14eb3939fda9031d978f9 [2022-07-19 12:21:25,549 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 12:21:25,550 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 12:21:25,552 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 12:21:25,552 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 12:21:25,554 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 12:21:25,555 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 12:21:25" (1/1) ... [2022-07-19 12:21:25,556 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7641330c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:21:25, skipping insertion in model container [2022-07-19 12:21:25,556 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 12:21:25" (1/1) ... [2022-07-19 12:21:25,560 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 12:21:25,643 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 12:21:25,863 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/eca-rers2012/Problem13_label40.c[4201,4214] [2022-07-19 12:21:26,438 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 12:21:26,444 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 12:21:26,467 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/eca-rers2012/Problem13_label40.c[4201,4214] [2022-07-19 12:21:26,805 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 12:21:26,822 INFO L208 MainTranslator]: Completed translation [2022-07-19 12:21:26,823 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:21:26 WrapperNode [2022-07-19 12:21:26,823 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 12:21:26,824 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 12:21:26,824 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 12:21:26,824 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 12:21:26,830 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:21:26" (1/1) ... [2022-07-19 12:21:26,876 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:21:26" (1/1) ... [2022-07-19 12:21:27,340 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5583 [2022-07-19 12:21:27,340 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 12:21:27,341 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 12:21:27,341 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 12:21:27,341 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 12:21:27,348 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:21:26" (1/1) ... [2022-07-19 12:21:27,360 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:21:26" (1/1) ... [2022-07-19 12:21:27,493 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:21:26" (1/1) ... [2022-07-19 12:21:27,494 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:21:26" (1/1) ... [2022-07-19 12:21:27,764 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:21:26" (1/1) ... [2022-07-19 12:21:27,786 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:21:26" (1/1) ... [2022-07-19 12:21:27,844 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:21:26" (1/1) ... [2022-07-19 12:21:27,921 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 12:21:27,923 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 12:21:27,924 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 12:21:27,924 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 12:21:27,925 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:21:26" (1/1) ... [2022-07-19 12:21:27,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 12:21:27,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 12:21:27,946 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 12:21:27,976 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 12:21:27,992 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 12:21:27,993 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 12:21:27,993 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 12:21:27,993 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 12:21:28,043 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 12:21:28,044 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 12:21:31,452 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 12:21:31,473 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 12:21:31,474 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-19 12:21:31,477 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 12:21:31 BoogieIcfgContainer [2022-07-19 12:21:31,477 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 12:21:31,480 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 12:21:31,480 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 12:21:31,483 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 12:21:31,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 12:21:25" (1/3) ... [2022-07-19 12:21:31,484 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@be6f5e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 12:21:31, skipping insertion in model container [2022-07-19 12:21:31,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:21:26" (2/3) ... [2022-07-19 12:21:31,485 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@be6f5e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 12:21:31, skipping insertion in model container [2022-07-19 12:21:31,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 12:21:31" (3/3) ... [2022-07-19 12:21:31,487 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label40.c [2022-07-19 12:21:31,499 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 12:21:31,499 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 12:21:31,561 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 12:21:31,566 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@5dc94ca8, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@50b51d39 [2022-07-19 12:21:31,566 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 12:21:31,572 INFO L276 IsEmpty]: Start isEmpty. Operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:21:31,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-19 12:21:31,577 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:21:31,577 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:21:31,578 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:21:31,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:21:31,582 INFO L85 PathProgramCache]: Analyzing trace with hash -716875070, now seen corresponding path program 1 times [2022-07-19 12:21:31,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:21:31,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239694548] [2022-07-19 12:21:31,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:21:31,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:21:31,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:21:31,711 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 12:21:31,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:21:31,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239694548] [2022-07-19 12:21:31,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239694548] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:21:31,712 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:21:31,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 12:21:31,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204696493] [2022-07-19 12:21:31,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:21:31,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:21:31,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:21:31,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:21:31,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:21:31,739 INFO L87 Difference]: Start difference. First operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:21:35,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:21:35,347 INFO L93 Difference]: Finished difference Result 3147 states and 5806 transitions. [2022-07-19 12:21:35,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:21:35,349 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-07-19 12:21:35,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:21:35,380 INFO L225 Difference]: With dead ends: 3147 [2022-07-19 12:21:35,381 INFO L226 Difference]: Without dead ends: 1964 [2022-07-19 12:21:35,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:21:35,400 INFO L413 NwaCegarLoop]: 764 mSDtfsCounter, 1151 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 2714 mSolverCounterSat, 584 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1151 SdHoareTripleChecker+Valid, 992 SdHoareTripleChecker+Invalid, 3298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 584 IncrementalHoareTripleChecker+Valid, 2714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-07-19 12:21:35,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1151 Valid, 992 Invalid, 3298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [584 Valid, 2714 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-07-19 12:21:35,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1964 states. [2022-07-19 12:21:35,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1964 to 1951. [2022-07-19 12:21:35,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1951 states, 1950 states have (on average 1.6538461538461537) internal successors, (3225), 1950 states have internal predecessors, (3225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:21:35,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1951 states to 1951 states and 3225 transitions. [2022-07-19 12:21:35,504 INFO L78 Accepts]: Start accepts. Automaton has 1951 states and 3225 transitions. Word has length 28 [2022-07-19 12:21:35,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:21:35,504 INFO L495 AbstractCegarLoop]: Abstraction has 1951 states and 3225 transitions. [2022-07-19 12:21:35,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:21:35,505 INFO L276 IsEmpty]: Start isEmpty. Operand 1951 states and 3225 transitions. [2022-07-19 12:21:35,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-07-19 12:21:35,507 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:21:35,507 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:21:35,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 12:21:35,508 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:21:35,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:21:35,509 INFO L85 PathProgramCache]: Analyzing trace with hash 215513083, now seen corresponding path program 1 times [2022-07-19 12:21:35,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:21:35,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386219941] [2022-07-19 12:21:35,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:21:35,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:21:35,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:21:35,605 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 12:21:35,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:21:35,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386219941] [2022-07-19 12:21:35,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386219941] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:21:35,606 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:21:35,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 12:21:35,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979030605] [2022-07-19 12:21:35,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:21:35,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:21:35,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:21:35,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:21:35,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:21:35,609 INFO L87 Difference]: Start difference. First operand 1951 states and 3225 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:21:38,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:21:38,924 INFO L93 Difference]: Finished difference Result 5542 states and 9222 transitions. [2022-07-19 12:21:38,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:21:38,925 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2022-07-19 12:21:38,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:21:38,939 INFO L225 Difference]: With dead ends: 5542 [2022-07-19 12:21:38,939 INFO L226 Difference]: Without dead ends: 3593 [2022-07-19 12:21:38,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:21:38,943 INFO L413 NwaCegarLoop]: 872 mSDtfsCounter, 924 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 2592 mSolverCounterSat, 749 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 924 SdHoareTripleChecker+Valid, 1009 SdHoareTripleChecker+Invalid, 3341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 749 IncrementalHoareTripleChecker+Valid, 2592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-07-19 12:21:38,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [924 Valid, 1009 Invalid, 3341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [749 Valid, 2592 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-07-19 12:21:38,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3593 states. [2022-07-19 12:21:39,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3593 to 3581. [2022-07-19 12:21:39,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3581 states, 3580 states have (on average 1.5050279329608938) internal successors, (5388), 3580 states have internal predecessors, (5388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:21:39,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3581 states to 3581 states and 5388 transitions. [2022-07-19 12:21:39,088 INFO L78 Accepts]: Start accepts. Automaton has 3581 states and 5388 transitions. Word has length 99 [2022-07-19 12:21:39,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:21:39,090 INFO L495 AbstractCegarLoop]: Abstraction has 3581 states and 5388 transitions. [2022-07-19 12:21:39,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:21:39,091 INFO L276 IsEmpty]: Start isEmpty. Operand 3581 states and 5388 transitions. [2022-07-19 12:21:39,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-07-19 12:21:39,098 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:21:39,098 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:21:39,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 12:21:39,101 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:21:39,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:21:39,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1129801848, now seen corresponding path program 1 times [2022-07-19 12:21:39,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:21:39,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043619784] [2022-07-19 12:21:39,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:21:39,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:21:39,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:21:39,273 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 12:21:39,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:21:39,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043619784] [2022-07-19 12:21:39,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043619784] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:21:39,274 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:21:39,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 12:21:39,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166779071] [2022-07-19 12:21:39,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:21:39,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:21:39,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:21:39,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:21:39,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:21:39,277 INFO L87 Difference]: Start difference. First operand 3581 states and 5388 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:21:42,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:21:42,249 INFO L93 Difference]: Finished difference Result 10352 states and 15625 transitions. [2022-07-19 12:21:42,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:21:42,250 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2022-07-19 12:21:42,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:21:42,267 INFO L225 Difference]: With dead ends: 10352 [2022-07-19 12:21:42,267 INFO L226 Difference]: Without dead ends: 6773 [2022-07-19 12:21:42,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:21:42,277 INFO L413 NwaCegarLoop]: 1021 mSDtfsCounter, 786 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 2491 mSolverCounterSat, 786 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 786 SdHoareTripleChecker+Valid, 1171 SdHoareTripleChecker+Invalid, 3277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 786 IncrementalHoareTripleChecker+Valid, 2491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-07-19 12:21:42,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [786 Valid, 1171 Invalid, 3277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [786 Valid, 2491 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-07-19 12:21:42,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6773 states. [2022-07-19 12:21:42,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6773 to 6749. [2022-07-19 12:21:42,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6749 states, 6748 states have (on average 1.3255779490219324) internal successors, (8945), 6748 states have internal predecessors, (8945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:21:42,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6749 states to 6749 states and 8945 transitions. [2022-07-19 12:21:42,359 INFO L78 Accepts]: Start accepts. Automaton has 6749 states and 8945 transitions. Word has length 113 [2022-07-19 12:21:42,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:21:42,359 INFO L495 AbstractCegarLoop]: Abstraction has 6749 states and 8945 transitions. [2022-07-19 12:21:42,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:21:42,359 INFO L276 IsEmpty]: Start isEmpty. Operand 6749 states and 8945 transitions. [2022-07-19 12:21:42,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-07-19 12:21:42,362 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:21:42,362 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:21:42,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 12:21:42,363 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:21:42,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:21:42,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1928986802, now seen corresponding path program 1 times [2022-07-19 12:21:42,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:21:42,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940389430] [2022-07-19 12:21:42,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:21:42,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:21:42,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:21:42,511 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 12:21:42,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:21:42,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940389430] [2022-07-19 12:21:42,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940389430] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:21:42,514 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:21:42,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 12:21:42,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638037524] [2022-07-19 12:21:42,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:21:42,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:21:42,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:21:42,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:21:42,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:21:42,516 INFO L87 Difference]: Start difference. First operand 6749 states and 8945 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 2 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:21:45,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:21:45,330 INFO L93 Difference]: Finished difference Result 19804 states and 26226 transitions. [2022-07-19 12:21:45,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:21:45,330 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 2 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 142 [2022-07-19 12:21:45,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:21:45,396 INFO L225 Difference]: With dead ends: 19804 [2022-07-19 12:21:45,396 INFO L226 Difference]: Without dead ends: 13057 [2022-07-19 12:21:45,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:21:45,412 INFO L413 NwaCegarLoop]: 883 mSDtfsCounter, 865 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 2330 mSolverCounterSat, 875 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 865 SdHoareTripleChecker+Valid, 1035 SdHoareTripleChecker+Invalid, 3205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 875 IncrementalHoareTripleChecker+Valid, 2330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-07-19 12:21:45,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [865 Valid, 1035 Invalid, 3205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [875 Valid, 2330 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-07-19 12:21:45,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13057 states. [2022-07-19 12:21:45,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13057 to 13052. [2022-07-19 12:21:45,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13052 states, 13051 states have (on average 1.2182208259903455) internal successors, (15899), 13051 states have internal predecessors, (15899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:21:45,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13052 states to 13052 states and 15899 transitions. [2022-07-19 12:21:45,606 INFO L78 Accepts]: Start accepts. Automaton has 13052 states and 15899 transitions. Word has length 142 [2022-07-19 12:21:45,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:21:45,607 INFO L495 AbstractCegarLoop]: Abstraction has 13052 states and 15899 transitions. [2022-07-19 12:21:45,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 2 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:21:45,608 INFO L276 IsEmpty]: Start isEmpty. Operand 13052 states and 15899 transitions. [2022-07-19 12:21:45,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-07-19 12:21:45,609 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:21:45,610 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:21:45,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 12:21:45,610 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:21:45,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:21:45,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1888751763, now seen corresponding path program 1 times [2022-07-19 12:21:45,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:21:45,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950746836] [2022-07-19 12:21:45,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:21:45,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:21:45,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:21:45,745 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 12:21:45,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:21:45,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950746836] [2022-07-19 12:21:45,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950746836] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:21:45,746 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:21:45,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:21:45,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108578513] [2022-07-19 12:21:45,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:21:45,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 12:21:45,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:21:45,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 12:21:45,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 12:21:45,748 INFO L87 Difference]: Start difference. First operand 13052 states and 15899 transitions. Second operand has 4 states, 4 states have (on average 38.25) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:21:52,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:21:52,409 INFO L93 Difference]: Finished difference Result 47613 states and 58541 transitions. [2022-07-19 12:21:52,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 12:21:52,423 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 153 [2022-07-19 12:21:52,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:21:52,492 INFO L225 Difference]: With dead ends: 47613 [2022-07-19 12:21:52,492 INFO L226 Difference]: Without dead ends: 34563 [2022-07-19 12:21:52,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 12:21:52,510 INFO L413 NwaCegarLoop]: 1010 mSDtfsCounter, 1651 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 7510 mSolverCounterSat, 603 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1651 SdHoareTripleChecker+Valid, 1300 SdHoareTripleChecker+Invalid, 8113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 603 IncrementalHoareTripleChecker+Valid, 7510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-07-19 12:21:52,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1651 Valid, 1300 Invalid, 8113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [603 Valid, 7510 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2022-07-19 12:21:52,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34563 states. [2022-07-19 12:21:52,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34563 to 34360. [2022-07-19 12:21:52,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34360 states, 34359 states have (on average 1.1786431502663057) internal successors, (40497), 34359 states have internal predecessors, (40497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:21:53,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34360 states to 34360 states and 40497 transitions. [2022-07-19 12:21:53,011 INFO L78 Accepts]: Start accepts. Automaton has 34360 states and 40497 transitions. Word has length 153 [2022-07-19 12:21:53,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:21:53,012 INFO L495 AbstractCegarLoop]: Abstraction has 34360 states and 40497 transitions. [2022-07-19 12:21:53,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:21:53,015 INFO L276 IsEmpty]: Start isEmpty. Operand 34360 states and 40497 transitions. [2022-07-19 12:21:53,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-07-19 12:21:53,018 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:21:53,018 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:21:53,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 12:21:53,019 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:21:53,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:21:53,020 INFO L85 PathProgramCache]: Analyzing trace with hash 245627492, now seen corresponding path program 1 times [2022-07-19 12:21:53,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:21:53,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139545387] [2022-07-19 12:21:53,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:21:53,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:21:53,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:21:53,118 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-19 12:21:53,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:21:53,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139545387] [2022-07-19 12:21:53,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139545387] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:21:53,118 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:21:53,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 12:21:53,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048421178] [2022-07-19 12:21:53,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:21:53,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:21:53,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:21:53,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:21:53,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:21:53,120 INFO L87 Difference]: Start difference. First operand 34360 states and 40497 transitions. Second operand has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 2 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:21:55,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:21:55,756 INFO L93 Difference]: Finished difference Result 69505 states and 81794 transitions. [2022-07-19 12:21:55,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:21:55,757 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 2 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 218 [2022-07-19 12:21:55,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:21:55,816 INFO L225 Difference]: With dead ends: 69505 [2022-07-19 12:21:55,816 INFO L226 Difference]: Without dead ends: 35147 [2022-07-19 12:21:55,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:21:55,851 INFO L413 NwaCegarLoop]: 1083 mSDtfsCounter, 700 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 2520 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 700 SdHoareTripleChecker+Valid, 1212 SdHoareTripleChecker+Invalid, 2529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 2520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-19 12:21:55,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [700 Valid, 1212 Invalid, 2529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 2520 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-07-19 12:21:55,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35147 states. [2022-07-19 12:21:56,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35147 to 35147. [2022-07-19 12:21:56,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35147 states, 35146 states have (on average 1.1747851818130086) internal successors, (41289), 35146 states have internal predecessors, (41289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:21:56,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35147 states to 35147 states and 41289 transitions. [2022-07-19 12:21:56,347 INFO L78 Accepts]: Start accepts. Automaton has 35147 states and 41289 transitions. Word has length 218 [2022-07-19 12:21:56,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:21:56,347 INFO L495 AbstractCegarLoop]: Abstraction has 35147 states and 41289 transitions. [2022-07-19 12:21:56,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 2 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:21:56,348 INFO L276 IsEmpty]: Start isEmpty. Operand 35147 states and 41289 transitions. [2022-07-19 12:21:56,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2022-07-19 12:21:56,350 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:21:56,350 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:21:56,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-19 12:21:56,350 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:21:56,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:21:56,351 INFO L85 PathProgramCache]: Analyzing trace with hash 518295855, now seen corresponding path program 1 times [2022-07-19 12:21:56,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:21:56,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271218064] [2022-07-19 12:21:56,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:21:56,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:21:56,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:21:56,430 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 12:21:56,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:21:56,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271218064] [2022-07-19 12:21:56,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271218064] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:21:56,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:21:56,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:21:56,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467767149] [2022-07-19 12:21:56,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:21:56,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 12:21:56,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:21:56,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 12:21:56,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 12:21:56,432 INFO L87 Difference]: Start difference. First operand 35147 states and 41289 transitions. Second operand has 4 states, 4 states have (on average 56.25) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:22:02,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:22:02,645 INFO L93 Difference]: Finished difference Result 94992 states and 112854 transitions. [2022-07-19 12:22:02,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 12:22:02,645 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.25) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 225 [2022-07-19 12:22:02,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:22:02,741 INFO L225 Difference]: With dead ends: 94992 [2022-07-19 12:22:02,741 INFO L226 Difference]: Without dead ends: 60634 [2022-07-19 12:22:02,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 12:22:02,774 INFO L413 NwaCegarLoop]: 632 mSDtfsCounter, 1741 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 6170 mSolverCounterSat, 1151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1741 SdHoareTripleChecker+Valid, 840 SdHoareTripleChecker+Invalid, 7321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1151 IncrementalHoareTripleChecker+Valid, 6170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-07-19 12:22:02,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1741 Valid, 840 Invalid, 7321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1151 Valid, 6170 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2022-07-19 12:22:02,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60634 states. [2022-07-19 12:22:03,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60634 to 60455. [2022-07-19 12:22:03,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60455 states, 60454 states have (on average 1.1679624177060244) internal successors, (70608), 60454 states have internal predecessors, (70608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:22:03,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60455 states to 60455 states and 70608 transitions. [2022-07-19 12:22:03,546 INFO L78 Accepts]: Start accepts. Automaton has 60455 states and 70608 transitions. Word has length 225 [2022-07-19 12:22:03,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:22:03,547 INFO L495 AbstractCegarLoop]: Abstraction has 60455 states and 70608 transitions. [2022-07-19 12:22:03,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.25) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:22:03,547 INFO L276 IsEmpty]: Start isEmpty. Operand 60455 states and 70608 transitions. [2022-07-19 12:22:03,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2022-07-19 12:22:03,549 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:22:03,550 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 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] [2022-07-19 12:22:03,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-19 12:22:03,550 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:22:03,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:22:03,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1054166602, now seen corresponding path program 1 times [2022-07-19 12:22:03,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:22:03,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657392526] [2022-07-19 12:22:03,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:22:03,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:22:03,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:22:03,637 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 12:22:03,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:22:03,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657392526] [2022-07-19 12:22:03,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657392526] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:22:03,638 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:22:03,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:22:03,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142451549] [2022-07-19 12:22:03,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:22:03,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:22:03,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:22:03,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:22:03,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:22:03,640 INFO L87 Difference]: Start difference. First operand 60455 states and 70608 transitions. Second operand has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:22:07,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:22:07,155 INFO L93 Difference]: Finished difference Result 146103 states and 173484 transitions. [2022-07-19 12:22:07,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:22:07,156 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 235 [2022-07-19 12:22:07,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:22:07,277 INFO L225 Difference]: With dead ends: 146103 [2022-07-19 12:22:07,278 INFO L226 Difference]: Without dead ends: 86437 [2022-07-19 12:22:07,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:22:07,316 INFO L413 NwaCegarLoop]: 964 mSDtfsCounter, 811 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 2449 mSolverCounterSat, 877 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 811 SdHoareTripleChecker+Valid, 1083 SdHoareTripleChecker+Invalid, 3326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 877 IncrementalHoareTripleChecker+Valid, 2449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-07-19 12:22:07,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [811 Valid, 1083 Invalid, 3326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [877 Valid, 2449 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-07-19 12:22:07,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86437 states. [2022-07-19 12:22:08,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86437 to 84851. [2022-07-19 12:22:08,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84851 states, 84850 states have (on average 1.1580907483794933) internal successors, (98264), 84850 states have internal predecessors, (98264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:22:08,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84851 states to 84851 states and 98264 transitions. [2022-07-19 12:22:08,442 INFO L78 Accepts]: Start accepts. Automaton has 84851 states and 98264 transitions. Word has length 235 [2022-07-19 12:22:08,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:22:08,443 INFO L495 AbstractCegarLoop]: Abstraction has 84851 states and 98264 transitions. [2022-07-19 12:22:08,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:22:08,443 INFO L276 IsEmpty]: Start isEmpty. Operand 84851 states and 98264 transitions. [2022-07-19 12:22:08,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2022-07-19 12:22:08,445 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:22:08,445 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 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] [2022-07-19 12:22:08,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-19 12:22:08,446 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:22:08,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:22:08,446 INFO L85 PathProgramCache]: Analyzing trace with hash 945283299, now seen corresponding path program 1 times [2022-07-19 12:22:08,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:22:08,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392074760] [2022-07-19 12:22:08,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:22:08,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:22:08,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:22:08,524 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 139 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 12:22:08,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:22:08,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392074760] [2022-07-19 12:22:08,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392074760] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:22:08,525 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:22:08,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:22:08,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53075963] [2022-07-19 12:22:08,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:22:08,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:22:08,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:22:08,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:22:08,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:22:08,526 INFO L87 Difference]: Start difference. First operand 84851 states and 98264 transitions. Second operand has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:22:11,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:22:11,774 INFO L93 Difference]: Finished difference Result 166365 states and 192910 transitions. [2022-07-19 12:22:11,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:22:11,775 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 242 [2022-07-19 12:22:11,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:22:11,894 INFO L225 Difference]: With dead ends: 166365 [2022-07-19 12:22:11,894 INFO L226 Difference]: Without dead ends: 82303 [2022-07-19 12:22:12,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:22:12,075 INFO L413 NwaCegarLoop]: 1512 mSDtfsCounter, 1036 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 2354 mSolverCounterSat, 595 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1036 SdHoareTripleChecker+Valid, 1648 SdHoareTripleChecker+Invalid, 2949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 595 IncrementalHoareTripleChecker+Valid, 2354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-07-19 12:22:12,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1036 Valid, 1648 Invalid, 2949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [595 Valid, 2354 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-07-19 12:22:12,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82303 states. [2022-07-19 12:22:12,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82303 to 75995. [2022-07-19 12:22:12,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75995 states, 75994 states have (on average 1.1166802642313867) internal successors, (84861), 75994 states have internal predecessors, (84861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:22:12,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75995 states to 75995 states and 84861 transitions. [2022-07-19 12:22:12,964 INFO L78 Accepts]: Start accepts. Automaton has 75995 states and 84861 transitions. Word has length 242 [2022-07-19 12:22:12,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:22:12,966 INFO L495 AbstractCegarLoop]: Abstraction has 75995 states and 84861 transitions. [2022-07-19 12:22:12,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:22:12,967 INFO L276 IsEmpty]: Start isEmpty. Operand 75995 states and 84861 transitions. [2022-07-19 12:22:12,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2022-07-19 12:22:12,970 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:22:12,971 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:22:12,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-19 12:22:12,971 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:22:12,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:22:12,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1755959963, now seen corresponding path program 1 times [2022-07-19 12:22:12,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:22:12,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497198261] [2022-07-19 12:22:12,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:22:12,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:22:13,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:22:13,201 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 261 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-07-19 12:22:13,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:22:13,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497198261] [2022-07-19 12:22:13,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497198261] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:22:13,201 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:22:13,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:22:13,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988036220] [2022-07-19 12:22:13,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:22:13,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:22:13,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:22:13,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:22:13,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:22:13,203 INFO L87 Difference]: Start difference. First operand 75995 states and 84861 transitions. Second operand has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:22:16,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:22:16,409 INFO L93 Difference]: Finished difference Result 153566 states and 171314 transitions. [2022-07-19 12:22:16,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:22:16,410 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 314 [2022-07-19 12:22:16,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:22:16,664 INFO L225 Difference]: With dead ends: 153566 [2022-07-19 12:22:16,664 INFO L226 Difference]: Without dead ends: 78360 [2022-07-19 12:22:16,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:22:16,686 INFO L413 NwaCegarLoop]: 1391 mSDtfsCounter, 939 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 2487 mSolverCounterSat, 606 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 939 SdHoareTripleChecker+Valid, 1477 SdHoareTripleChecker+Invalid, 3093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 606 IncrementalHoareTripleChecker+Valid, 2487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-07-19 12:22:16,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [939 Valid, 1477 Invalid, 3093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [606 Valid, 2487 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-07-19 12:22:16,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78360 states. [2022-07-19 12:22:17,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78360 to 75988. [2022-07-19 12:22:17,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75988 states, 75987 states have (on average 1.0957400607998737) internal successors, (83262), 75987 states have internal predecessors, (83262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:22:17,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75988 states to 75988 states and 83262 transitions. [2022-07-19 12:22:17,695 INFO L78 Accepts]: Start accepts. Automaton has 75988 states and 83262 transitions. Word has length 314 [2022-07-19 12:22:17,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:22:17,695 INFO L495 AbstractCegarLoop]: Abstraction has 75988 states and 83262 transitions. [2022-07-19 12:22:17,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:22:17,696 INFO L276 IsEmpty]: Start isEmpty. Operand 75988 states and 83262 transitions. [2022-07-19 12:22:17,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2022-07-19 12:22:17,699 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:22:17,699 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-19 12:22:17,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-19 12:22:17,699 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:22:17,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:22:17,700 INFO L85 PathProgramCache]: Analyzing trace with hash -444136852, now seen corresponding path program 1 times [2022-07-19 12:22:17,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:22:17,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388012492] [2022-07-19 12:22:17,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:22:17,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:22:17,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:22:17,797 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 261 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-07-19 12:22:17,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:22:17,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388012492] [2022-07-19 12:22:17,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388012492] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:22:17,797 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:22:17,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:22:17,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199506826] [2022-07-19 12:22:17,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:22:17,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:22:17,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:22:17,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:22:17,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:22:17,801 INFO L87 Difference]: Start difference. First operand 75988 states and 83262 transitions. Second operand has 3 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:22:20,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:22:20,873 INFO L93 Difference]: Finished difference Result 173236 states and 190620 transitions. [2022-07-19 12:22:20,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:22:20,874 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 324 [2022-07-19 12:22:20,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:22:20,987 INFO L225 Difference]: With dead ends: 173236 [2022-07-19 12:22:20,988 INFO L226 Difference]: Without dead ends: 98037 [2022-07-19 12:22:21,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:22:21,017 INFO L413 NwaCegarLoop]: 765 mSDtfsCounter, 894 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 2402 mSolverCounterSat, 774 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 894 SdHoareTripleChecker+Valid, 846 SdHoareTripleChecker+Invalid, 3176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 774 IncrementalHoareTripleChecker+Valid, 2402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-19 12:22:21,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [894 Valid, 846 Invalid, 3176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [774 Valid, 2402 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-07-19 12:22:21,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98037 states. [2022-07-19 12:22:21,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98037 to 96447. [2022-07-19 12:22:22,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96447 states, 96446 states have (on average 1.0905791842067063) internal successors, (105182), 96446 states have internal predecessors, (105182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:22:22,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96447 states to 96447 states and 105182 transitions. [2022-07-19 12:22:22,158 INFO L78 Accepts]: Start accepts. Automaton has 96447 states and 105182 transitions. Word has length 324 [2022-07-19 12:22:22,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:22:22,159 INFO L495 AbstractCegarLoop]: Abstraction has 96447 states and 105182 transitions. [2022-07-19 12:22:22,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:22:22,159 INFO L276 IsEmpty]: Start isEmpty. Operand 96447 states and 105182 transitions. [2022-07-19 12:22:22,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2022-07-19 12:22:22,162 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:22:22,163 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-19 12:22:22,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-19 12:22:22,163 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:22:22,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:22:22,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1192441845, now seen corresponding path program 1 times [2022-07-19 12:22:22,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:22:22,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538875] [2022-07-19 12:22:22,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:22:22,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:22:22,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:22:22,247 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 247 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-07-19 12:22:22,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:22:22,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538875] [2022-07-19 12:22:22,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538875] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:22:22,247 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:22:22,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 12:22:22,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203417227] [2022-07-19 12:22:22,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:22:22,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:22:22,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:22:22,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:22:22,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:22:22,249 INFO L87 Difference]: Start difference. First operand 96447 states and 105182 transitions. Second operand has 3 states, 3 states have (on average 74.0) internal successors, (222), 2 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:22:25,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:22:25,763 INFO L93 Difference]: Finished difference Result 209437 states and 227970 transitions. [2022-07-19 12:22:25,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:22:25,763 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 2 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 341 [2022-07-19 12:22:25,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:22:25,892 INFO L225 Difference]: With dead ends: 209437 [2022-07-19 12:22:25,892 INFO L226 Difference]: Without dead ends: 113779 [2022-07-19 12:22:25,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:22:25,937 INFO L413 NwaCegarLoop]: 1023 mSDtfsCounter, 724 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 2684 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 724 SdHoareTripleChecker+Valid, 1197 SdHoareTripleChecker+Invalid, 2824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 2684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-07-19 12:22:25,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [724 Valid, 1197 Invalid, 2824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 2684 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-07-19 12:22:26,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113779 states. [2022-07-19 12:22:27,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113779 to 112982. [2022-07-19 12:22:27,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112982 states, 112981 states have (on average 1.081836769014259) internal successors, (122227), 112981 states have internal predecessors, (122227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:22:27,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112982 states to 112982 states and 122227 transitions. [2022-07-19 12:22:27,308 INFO L78 Accepts]: Start accepts. Automaton has 112982 states and 122227 transitions. Word has length 341 [2022-07-19 12:22:27,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:22:27,309 INFO L495 AbstractCegarLoop]: Abstraction has 112982 states and 122227 transitions. [2022-07-19 12:22:27,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 2 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:22:27,309 INFO L276 IsEmpty]: Start isEmpty. Operand 112982 states and 122227 transitions. [2022-07-19 12:22:27,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2022-07-19 12:22:27,312 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:22:27,313 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-19 12:22:27,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-19 12:22:27,313 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:22:27,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:22:27,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1539895112, now seen corresponding path program 1 times [2022-07-19 12:22:27,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:22:27,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837108719] [2022-07-19 12:22:27,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:22:27,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:22:27,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:22:27,436 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2022-07-19 12:22:27,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:22:27,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837108719] [2022-07-19 12:22:27,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837108719] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:22:27,437 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:22:27,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:22:27,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431004902] [2022-07-19 12:22:27,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:22:27,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 12:22:27,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:22:27,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 12:22:27,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 12:22:27,439 INFO L87 Difference]: Start difference. First operand 112982 states and 122227 transitions. Second operand has 4 states, 4 states have (on average 43.25) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:22:32,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:22:32,307 INFO L93 Difference]: Finished difference Result 274832 states and 300813 transitions. [2022-07-19 12:22:32,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 12:22:32,308 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 43.25) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 355 [2022-07-19 12:22:32,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:22:32,549 INFO L225 Difference]: With dead ends: 274832 [2022-07-19 12:22:32,550 INFO L226 Difference]: Without dead ends: 179174 [2022-07-19 12:22:32,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 12:22:32,787 INFO L413 NwaCegarLoop]: 726 mSDtfsCounter, 1638 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 5280 mSolverCounterSat, 811 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1638 SdHoareTripleChecker+Valid, 947 SdHoareTripleChecker+Invalid, 6091 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 811 IncrementalHoareTripleChecker+Valid, 5280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-07-19 12:22:32,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1638 Valid, 947 Invalid, 6091 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [811 Valid, 5280 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-07-19 12:22:32,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179174 states. [2022-07-19 12:22:34,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179174 to 178336. [2022-07-19 12:22:34,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178336 states, 178335 states have (on average 1.0821655872375024) internal successors, (192988), 178335 states have internal predecessors, (192988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:22:34,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178336 states to 178336 states and 192988 transitions. [2022-07-19 12:22:34,831 INFO L78 Accepts]: Start accepts. Automaton has 178336 states and 192988 transitions. Word has length 355 [2022-07-19 12:22:34,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:22:34,832 INFO L495 AbstractCegarLoop]: Abstraction has 178336 states and 192988 transitions. [2022-07-19 12:22:34,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 43.25) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:22:34,832 INFO L276 IsEmpty]: Start isEmpty. Operand 178336 states and 192988 transitions. [2022-07-19 12:22:34,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2022-07-19 12:22:34,855 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:22:34,855 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2022-07-19 12:22:34,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-19 12:22:34,856 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:22:34,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:22:34,856 INFO L85 PathProgramCache]: Analyzing trace with hash -2088568846, now seen corresponding path program 1 times [2022-07-19 12:22:34,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:22:34,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194126315] [2022-07-19 12:22:34,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:22:34,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:22:34,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:22:35,037 INFO L134 CoverageAnalysis]: Checked inductivity of 548 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 445 trivial. 0 not checked. [2022-07-19 12:22:35,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:22:35,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194126315] [2022-07-19 12:22:35,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194126315] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:22:35,038 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:22:35,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:22:35,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193182223] [2022-07-19 12:22:35,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:22:35,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:22:35,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:22:35,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:22:35,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:22:35,040 INFO L87 Difference]: Start difference. First operand 178336 states and 192988 transitions. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:22:38,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:22:38,533 INFO L93 Difference]: Finished difference Result 359058 states and 388375 transitions. [2022-07-19 12:22:38,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:22:38,534 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 357 [2022-07-19 12:22:38,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:22:38,873 INFO L225 Difference]: With dead ends: 359058 [2022-07-19 12:22:38,873 INFO L226 Difference]: Without dead ends: 180724 [2022-07-19 12:22:38,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:22:38,985 INFO L413 NwaCegarLoop]: 1273 mSDtfsCounter, 1087 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 2461 mSolverCounterSat, 593 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1087 SdHoareTripleChecker+Valid, 1323 SdHoareTripleChecker+Invalid, 3054 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 593 IncrementalHoareTripleChecker+Valid, 2461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-19 12:22:38,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1087 Valid, 1323 Invalid, 3054 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [593 Valid, 2461 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-07-19 12:22:39,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180724 states. [2022-07-19 12:22:40,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180724 to 175184. [2022-07-19 12:22:40,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175184 states, 175183 states have (on average 1.077952769389724) internal successors, (188839), 175183 states have internal predecessors, (188839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:22:41,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175184 states to 175184 states and 188839 transitions. [2022-07-19 12:22:41,541 INFO L78 Accepts]: Start accepts. Automaton has 175184 states and 188839 transitions. Word has length 357 [2022-07-19 12:22:41,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:22:41,541 INFO L495 AbstractCegarLoop]: Abstraction has 175184 states and 188839 transitions. [2022-07-19 12:22:41,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:22:41,541 INFO L276 IsEmpty]: Start isEmpty. Operand 175184 states and 188839 transitions. [2022-07-19 12:22:41,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2022-07-19 12:22:41,547 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:22:41,547 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-19 12:22:41,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-19 12:22:41,548 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:22:41,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:22:41,548 INFO L85 PathProgramCache]: Analyzing trace with hash 221236577, now seen corresponding path program 1 times [2022-07-19 12:22:41,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:22:41,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493786056] [2022-07-19 12:22:41,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:22:41,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:22:41,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:22:41,776 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 252 proven. 113 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-19 12:22:41,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:22:41,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493786056] [2022-07-19 12:22:41,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493786056] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 12:22:41,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203908702] [2022-07-19 12:22:41,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:22:41,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 12:22:41,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 12:22:41,779 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 12:22:41,779 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 12:22:41,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:22:41,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 12:22:41,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 12:22:42,008 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 278 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2022-07-19 12:22:42,010 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 12:22:42,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203908702] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:22:42,010 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 12:22:42,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2022-07-19 12:22:42,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339440434] [2022-07-19 12:22:42,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:22:42,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:22:42,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:22:42,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:22:42,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-07-19 12:22:42,016 INFO L87 Difference]: Start difference. First operand 175184 states and 188839 transitions. Second operand has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:22:45,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:22:45,630 INFO L93 Difference]: Finished difference Result 347216 states and 374217 transitions. [2022-07-19 12:22:45,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:22:45,631 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 370 [2022-07-19 12:22:45,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:22:45,862 INFO L225 Difference]: With dead ends: 347216 [2022-07-19 12:22:45,862 INFO L226 Difference]: Without dead ends: 172821 [2022-07-19 12:22:45,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 369 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-07-19 12:22:45,959 INFO L413 NwaCegarLoop]: 1337 mSDtfsCounter, 1094 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 2459 mSolverCounterSat, 441 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1094 SdHoareTripleChecker+Valid, 1416 SdHoareTripleChecker+Invalid, 2900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 441 IncrementalHoareTripleChecker+Valid, 2459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-07-19 12:22:45,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1094 Valid, 1416 Invalid, 2900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [441 Valid, 2459 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-07-19 12:22:46,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172821 states. [2022-07-19 12:22:47,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172821 to 171241. [2022-07-19 12:22:47,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171241 states, 171240 states have (on average 1.0590983415089932) internal successors, (181360), 171240 states have internal predecessors, (181360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:22:48,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171241 states to 171241 states and 181360 transitions. [2022-07-19 12:22:48,283 INFO L78 Accepts]: Start accepts. Automaton has 171241 states and 181360 transitions. Word has length 370 [2022-07-19 12:22:48,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:22:48,283 INFO L495 AbstractCegarLoop]: Abstraction has 171241 states and 181360 transitions. [2022-07-19 12:22:48,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:22:48,284 INFO L276 IsEmpty]: Start isEmpty. Operand 171241 states and 181360 transitions. [2022-07-19 12:22:48,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2022-07-19 12:22:48,287 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:22:48,287 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:22:48,304 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-19 12:22:48,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-19 12:22:48,504 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:22:48,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:22:48,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1276482095, now seen corresponding path program 1 times [2022-07-19 12:22:48,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:22:48,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556998878] [2022-07-19 12:22:48,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:22:48,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:22:48,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:22:48,628 INFO L134 CoverageAnalysis]: Checked inductivity of 593 backedges. 360 proven. 0 refuted. 0 times theorem prover too weak. 233 trivial. 0 not checked. [2022-07-19 12:22:48,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:22:48,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556998878] [2022-07-19 12:22:48,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556998878] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:22:48,635 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:22:48,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 12:22:48,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796690994] [2022-07-19 12:22:48,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:22:48,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 12:22:48,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:22:48,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 12:22:48,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 12:22:48,637 INFO L87 Difference]: Start difference. First operand 171241 states and 181360 transitions. Second operand has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:22:54,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:22:54,820 INFO L93 Difference]: Finished difference Result 416606 states and 443063 transitions. [2022-07-19 12:22:54,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 12:22:54,821 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 383 [2022-07-19 12:22:54,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:22:55,459 INFO L225 Difference]: With dead ends: 416606 [2022-07-19 12:22:55,459 INFO L226 Difference]: Without dead ends: 261900 [2022-07-19 12:22:55,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 12:22:55,551 INFO L413 NwaCegarLoop]: 564 mSDtfsCounter, 1936 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 4946 mSolverCounterSat, 1315 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1936 SdHoareTripleChecker+Valid, 785 SdHoareTripleChecker+Invalid, 6261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1315 IncrementalHoareTripleChecker+Valid, 4946 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-07-19 12:22:55,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1936 Valid, 785 Invalid, 6261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1315 Valid, 4946 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2022-07-19 12:22:55,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261900 states. [2022-07-19 12:22:58,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261900 to 250860. [2022-07-19 12:22:58,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250860 states, 250859 states have (on average 1.0575901203464895) internal successors, (265306), 250859 states have internal predecessors, (265306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:22:58,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250860 states to 250860 states and 265306 transitions. [2022-07-19 12:22:58,999 INFO L78 Accepts]: Start accepts. Automaton has 250860 states and 265306 transitions. Word has length 383 [2022-07-19 12:22:59,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:22:59,015 INFO L495 AbstractCegarLoop]: Abstraction has 250860 states and 265306 transitions. [2022-07-19 12:22:59,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:22:59,015 INFO L276 IsEmpty]: Start isEmpty. Operand 250860 states and 265306 transitions. [2022-07-19 12:22:59,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2022-07-19 12:22:59,020 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:22:59,021 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:22:59,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-19 12:22:59,022 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:22:59,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:22:59,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1925406683, now seen corresponding path program 1 times [2022-07-19 12:22:59,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:22:59,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846961540] [2022-07-19 12:22:59,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:22:59,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:22:59,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:22:59,332 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 355 proven. 113 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-07-19 12:22:59,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:22:59,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846961540] [2022-07-19 12:22:59,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846961540] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 12:22:59,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050147272] [2022-07-19 12:22:59,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:22:59,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 12:22:59,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 12:22:59,343 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 12:22:59,375 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 12:22:59,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:22:59,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 12:22:59,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 12:23:00,005 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 355 proven. 0 refuted. 0 times theorem prover too weak. 233 trivial. 0 not checked. [2022-07-19 12:23:00,006 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 12:23:00,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050147272] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:23:00,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 12:23:00,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2022-07-19 12:23:00,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957789983] [2022-07-19 12:23:00,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:23:00,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:23:00,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:23:00,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:23:00,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-07-19 12:23:00,008 INFO L87 Difference]: Start difference. First operand 250860 states and 265306 transitions. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)