./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 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/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.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 3af6b76c8112c46f4f3f430659495baba58dab9f6300080b3889ede952fb5526 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 06:14:09,290 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 06:14:09,293 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 06:14:09,354 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 06:14:09,355 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 06:14:09,357 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 06:14:09,362 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 06:14:09,365 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 06:14:09,366 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 06:14:09,371 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 06:14:09,372 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 06:14:09,377 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 06:14:09,377 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 06:14:09,379 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 06:14:09,380 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 06:14:09,383 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 06:14:09,383 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 06:14:09,384 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 06:14:09,386 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 06:14:09,391 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 06:14:09,392 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 06:14:09,394 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 06:14:09,395 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 06:14:09,396 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 06:14:09,398 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 06:14:09,404 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 06:14:09,405 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 06:14:09,405 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 06:14:09,406 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 06:14:09,406 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 06:14:09,407 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 06:14:09,408 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 06:14:09,409 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 06:14:09,410 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 06:14:09,411 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 06:14:09,412 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 06:14:09,412 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 06:14:09,413 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 06:14:09,413 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 06:14:09,413 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 06:14:09,414 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 06:14:09,416 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 06:14:09,425 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 06:14:09,457 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 06:14:09,458 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 06:14:09,458 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 06:14:09,458 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 06:14:09,459 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 06:14:09,459 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 06:14:09,460 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 06:14:09,460 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 06:14:09,460 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 06:14:09,461 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 06:14:09,461 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 06:14:09,462 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 06:14:09,462 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 06:14:09,462 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 06:14:09,462 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 06:14:09,462 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 06:14:09,463 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 06:14:09,463 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 06:14:09,463 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 06:14:09,463 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 06:14:09,463 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 06:14:09,464 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 06:14:09,464 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 06:14:09,464 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 06:14:09,464 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 06:14:09,464 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 06:14:09,464 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 06:14:09,465 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 06:14:09,465 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 06:14:09,465 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 06:14:09,465 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 06:14:09,466 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 06:14:09,466 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 06:14:09,466 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3af6b76c8112c46f4f3f430659495baba58dab9f6300080b3889ede952fb5526 [2022-07-21 06:14:09,831 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 06:14:09,866 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 06:14:09,869 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 06:14:09,870 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 06:14:09,870 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 06:14:09,872 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-07-21 06:14:09,945 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bcc076e16/48499c68914a42d7abfd0d8bcbd354d9/FLAG53b6bc745 [2022-07-21 06:14:10,498 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 06:14:10,508 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-07-21 06:14:10,523 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bcc076e16/48499c68914a42d7abfd0d8bcbd354d9/FLAG53b6bc745 [2022-07-21 06:14:10,907 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bcc076e16/48499c68914a42d7abfd0d8bcbd354d9 [2022-07-21 06:14:10,910 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 06:14:10,912 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 06:14:10,914 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 06:14:10,914 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 06:14:10,917 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 06:14:10,918 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 06:14:10" (1/1) ... [2022-07-21 06:14:10,919 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44852ce3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 06:14:10, skipping insertion in model container [2022-07-21 06:14:10,920 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 06:14:10" (1/1) ... [2022-07-21 06:14:10,926 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 06:14:10,978 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 06:14:11,251 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/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7752,7765] [2022-07-21 06:14:11,295 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 06:14:11,316 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 06:14:11,369 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/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7752,7765] [2022-07-21 06:14:11,385 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 06:14:11,401 INFO L208 MainTranslator]: Completed translation [2022-07-21 06:14:11,402 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 06:14:11 WrapperNode [2022-07-21 06:14:11,402 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 06:14:11,404 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 06:14:11,404 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 06:14:11,404 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 06:14:11,411 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 06:14:11" (1/1) ... [2022-07-21 06:14:11,421 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 06:14:11" (1/1) ... [2022-07-21 06:14:11,456 INFO L137 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 617 [2022-07-21 06:14:11,457 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 06:14:11,458 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 06:14:11,458 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 06:14:11,458 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 06:14:11,466 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 06:14:11" (1/1) ... [2022-07-21 06:14:11,466 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 06:14:11" (1/1) ... [2022-07-21 06:14:11,470 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 06:14:11" (1/1) ... [2022-07-21 06:14:11,470 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 06:14:11" (1/1) ... [2022-07-21 06:14:11,478 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 06:14:11" (1/1) ... [2022-07-21 06:14:11,484 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 06:14:11" (1/1) ... [2022-07-21 06:14:11,487 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 06:14:11" (1/1) ... [2022-07-21 06:14:11,492 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 06:14:11,493 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 06:14:11,493 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 06:14:11,493 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 06:14:11,500 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 06:14:11" (1/1) ... [2022-07-21 06:14:11,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 06:14:11,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 06:14:11,538 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) [2022-07-21 06:14:11,542 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 [2022-07-21 06:14:11,601 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 06:14:11,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 06:14:11,601 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 06:14:11,601 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 06:14:11,787 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 06:14:11,788 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 06:14:12,378 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 06:14:12,385 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 06:14:12,385 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-21 06:14:12,387 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 06:14:12 BoogieIcfgContainer [2022-07-21 06:14:12,387 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 06:14:12,389 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 06:14:12,389 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 06:14:12,391 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 06:14:12,392 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 06:14:10" (1/3) ... [2022-07-21 06:14:12,392 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f3f7257 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 06:14:12, skipping insertion in model container [2022-07-21 06:14:12,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 06:14:11" (2/3) ... [2022-07-21 06:14:12,393 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f3f7257 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 06:14:12, skipping insertion in model container [2022-07-21 06:14:12,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 06:14:12" (3/3) ... [2022-07-21 06:14:12,394 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-07-21 06:14:12,407 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 06:14:12,408 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 06:14:12,449 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 06:14:12,455 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@1ea0a928, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@534d100b [2022-07-21 06:14:12,455 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-21 06:14:12,460 INFO L276 IsEmpty]: Start isEmpty. Operand has 149 states, 147 states have (on average 1.7346938775510203) internal successors, (255), 148 states have internal predecessors, (255), 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) [2022-07-21 06:14:12,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-21 06:14:12,468 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 06:14:12,469 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 06:14:12,470 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 06:14:12,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 06:14:12,474 INFO L85 PathProgramCache]: Analyzing trace with hash -970283638, now seen corresponding path program 1 times [2022-07-21 06:14:12,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 06:14:12,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430131469] [2022-07-21 06:14:12,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 06:14:12,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 06:14:12,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:14:12,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 06:14:12,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 06:14:12,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430131469] [2022-07-21 06:14:12,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430131469] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 06:14:12,743 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 06:14:12,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 06:14:12,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181470107] [2022-07-21 06:14:12,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 06:14:12,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 06:14:12,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 06:14:12,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 06:14:12,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 06:14:12,786 INFO L87 Difference]: Start difference. First operand has 149 states, 147 states have (on average 1.7346938775510203) internal successors, (255), 148 states have internal predecessors, (255), 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 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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) [2022-07-21 06:14:12,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 06:14:12,871 INFO L93 Difference]: Finished difference Result 335 states and 559 transitions. [2022-07-21 06:14:12,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 06:14:12,873 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 56 [2022-07-21 06:14:12,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 06:14:12,883 INFO L225 Difference]: With dead ends: 335 [2022-07-21 06:14:12,883 INFO L226 Difference]: Without dead ends: 231 [2022-07-21 06:14:12,886 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 [2022-07-21 06:14:12,889 INFO L413 NwaCegarLoop]: 249 mSDtfsCounter, 151 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 06:14:12,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 448 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 06:14:12,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-07-21 06:14:12,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 228. [2022-07-21 06:14:12,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 1.5814977973568283) internal successors, (359), 227 states have internal predecessors, (359), 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) [2022-07-21 06:14:12,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 359 transitions. [2022-07-21 06:14:12,941 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 359 transitions. Word has length 56 [2022-07-21 06:14:12,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 06:14:12,942 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 359 transitions. [2022-07-21 06:14:12,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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) [2022-07-21 06:14:12,943 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 359 transitions. [2022-07-21 06:14:12,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-21 06:14:12,945 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 06:14:12,945 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 06:14:12,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 06:14:12,946 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 06:14:12,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 06:14:12,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1615417163, now seen corresponding path program 1 times [2022-07-21 06:14:12,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 06:14:12,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716544525] [2022-07-21 06:14:12,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 06:14:12,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 06:14:13,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:14:13,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 06:14:13,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 06:14:13,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716544525] [2022-07-21 06:14:13,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716544525] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 06:14:13,135 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 06:14:13,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 06:14:13,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32809317] [2022-07-21 06:14:13,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 06:14:13,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 06:14:13,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 06:14:13,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 06:14:13,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 06:14:13,141 INFO L87 Difference]: Start difference. First operand 228 states and 359 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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) [2022-07-21 06:14:13,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 06:14:13,232 INFO L93 Difference]: Finished difference Result 566 states and 911 transitions. [2022-07-21 06:14:13,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 06:14:13,233 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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 58 [2022-07-21 06:14:13,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 06:14:13,239 INFO L225 Difference]: With dead ends: 566 [2022-07-21 06:14:13,239 INFO L226 Difference]: Without dead ends: 389 [2022-07-21 06:14:13,245 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 [2022-07-21 06:14:13,247 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 133 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 06:14:13,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 424 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 06:14:13,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2022-07-21 06:14:13,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 385. [2022-07-21 06:14:13,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 1.5989583333333333) internal successors, (614), 384 states have internal predecessors, (614), 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) [2022-07-21 06:14:13,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 614 transitions. [2022-07-21 06:14:13,318 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 614 transitions. Word has length 58 [2022-07-21 06:14:13,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 06:14:13,319 INFO L495 AbstractCegarLoop]: Abstraction has 385 states and 614 transitions. [2022-07-21 06:14:13,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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) [2022-07-21 06:14:13,319 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 614 transitions. [2022-07-21 06:14:13,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-21 06:14:13,328 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 06:14:13,328 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 06:14:13,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 06:14:13,330 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 06:14:13,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 06:14:13,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1881805132, now seen corresponding path program 1 times [2022-07-21 06:14:13,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 06:14:13,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839384321] [2022-07-21 06:14:13,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 06:14:13,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 06:14:13,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:14:13,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 06:14:13,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 06:14:13,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839384321] [2022-07-21 06:14:13,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839384321] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 06:14:13,446 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 06:14:13,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 06:14:13,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147589300] [2022-07-21 06:14:13,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 06:14:13,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 06:14:13,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 06:14:13,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 06:14:13,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 06:14:13,448 INFO L87 Difference]: Start difference. First operand 385 states and 614 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 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) [2022-07-21 06:14:13,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 06:14:13,522 INFO L93 Difference]: Finished difference Result 1021 states and 1648 transitions. [2022-07-21 06:14:13,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 06:14:13,522 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 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 60 [2022-07-21 06:14:13,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 06:14:13,528 INFO L225 Difference]: With dead ends: 1021 [2022-07-21 06:14:13,528 INFO L226 Difference]: Without dead ends: 687 [2022-07-21 06:14:13,532 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 [2022-07-21 06:14:13,537 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 127 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 06:14:13,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 425 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 06:14:13,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2022-07-21 06:14:13,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 681. [2022-07-21 06:14:13,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 680 states have (on average 1.6029411764705883) internal successors, (1090), 680 states have internal predecessors, (1090), 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) [2022-07-21 06:14:13,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 1090 transitions. [2022-07-21 06:14:13,597 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 1090 transitions. Word has length 60 [2022-07-21 06:14:13,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 06:14:13,599 INFO L495 AbstractCegarLoop]: Abstraction has 681 states and 1090 transitions. [2022-07-21 06:14:13,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 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) [2022-07-21 06:14:13,599 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 1090 transitions. [2022-07-21 06:14:13,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-21 06:14:13,600 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 06:14:13,601 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 06:14:13,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 06:14:13,601 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 06:14:13,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 06:14:13,604 INFO L85 PathProgramCache]: Analyzing trace with hash 333047117, now seen corresponding path program 1 times [2022-07-21 06:14:13,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 06:14:13,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110013499] [2022-07-21 06:14:13,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 06:14:13,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 06:14:13,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:14:13,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 06:14:13,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 06:14:13,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110013499] [2022-07-21 06:14:13,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110013499] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 06:14:13,731 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 06:14:13,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 06:14:13,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632301196] [2022-07-21 06:14:13,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 06:14:13,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 06:14:13,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 06:14:13,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 06:14:13,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 06:14:13,734 INFO L87 Difference]: Start difference. First operand 681 states and 1090 transitions. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 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) [2022-07-21 06:14:14,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 06:14:14,036 INFO L93 Difference]: Finished difference Result 2973 states and 4848 transitions. [2022-07-21 06:14:14,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 06:14:14,038 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 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 62 [2022-07-21 06:14:14,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 06:14:14,051 INFO L225 Difference]: With dead ends: 2973 [2022-07-21 06:14:14,051 INFO L226 Difference]: Without dead ends: 2343 [2022-07-21 06:14:14,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-21 06:14:14,067 INFO L413 NwaCegarLoop]: 221 mSDtfsCounter, 1026 mSDsluCounter, 1351 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1026 SdHoareTripleChecker+Valid, 1572 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 06:14:14,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1026 Valid, 1572 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 06:14:14,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2343 states. [2022-07-21 06:14:14,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2343 to 1233. [2022-07-21 06:14:14,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1233 states, 1232 states have (on average 1.6112012987012987) internal successors, (1985), 1232 states have internal predecessors, (1985), 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) [2022-07-21 06:14:14,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1233 states to 1233 states and 1985 transitions. [2022-07-21 06:14:14,176 INFO L78 Accepts]: Start accepts. Automaton has 1233 states and 1985 transitions. Word has length 62 [2022-07-21 06:14:14,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 06:14:14,176 INFO L495 AbstractCegarLoop]: Abstraction has 1233 states and 1985 transitions. [2022-07-21 06:14:14,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 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) [2022-07-21 06:14:14,177 INFO L276 IsEmpty]: Start isEmpty. Operand 1233 states and 1985 transitions. [2022-07-21 06:14:14,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-21 06:14:14,178 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 06:14:14,178 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 06:14:14,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 06:14:14,179 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 06:14:14,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 06:14:14,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1672021844, now seen corresponding path program 1 times [2022-07-21 06:14:14,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 06:14:14,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623565226] [2022-07-21 06:14:14,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 06:14:14,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 06:14:14,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:14:14,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 06:14:14,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 06:14:14,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623565226] [2022-07-21 06:14:14,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623565226] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 06:14:14,252 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 06:14:14,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 06:14:14,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009512659] [2022-07-21 06:14:14,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 06:14:14,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 06:14:14,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 06:14:14,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 06:14:14,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 06:14:14,255 INFO L87 Difference]: Start difference. First operand 1233 states and 1985 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 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) [2022-07-21 06:14:14,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 06:14:14,484 INFO L93 Difference]: Finished difference Result 3613 states and 5881 transitions. [2022-07-21 06:14:14,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 06:14:14,485 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 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 63 [2022-07-21 06:14:14,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 06:14:14,495 INFO L225 Difference]: With dead ends: 3613 [2022-07-21 06:14:14,496 INFO L226 Difference]: Without dead ends: 2431 [2022-07-21 06:14:14,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 06:14:14,499 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 456 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 456 SdHoareTripleChecker+Valid, 769 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 06:14:14,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [456 Valid, 769 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 06:14:14,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2431 states. [2022-07-21 06:14:14,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2431 to 1823. [2022-07-21 06:14:14,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1823 states, 1822 states have (on average 1.6169045005488474) internal successors, (2946), 1822 states have internal predecessors, (2946), 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) [2022-07-21 06:14:14,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1823 states to 1823 states and 2946 transitions. [2022-07-21 06:14:14,673 INFO L78 Accepts]: Start accepts. Automaton has 1823 states and 2946 transitions. Word has length 63 [2022-07-21 06:14:14,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 06:14:14,673 INFO L495 AbstractCegarLoop]: Abstraction has 1823 states and 2946 transitions. [2022-07-21 06:14:14,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 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) [2022-07-21 06:14:14,674 INFO L276 IsEmpty]: Start isEmpty. Operand 1823 states and 2946 transitions. [2022-07-21 06:14:14,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-21 06:14:14,675 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 06:14:14,676 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 06:14:14,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-21 06:14:14,676 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 06:14:14,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 06:14:14,677 INFO L85 PathProgramCache]: Analyzing trace with hash 235123444, now seen corresponding path program 1 times [2022-07-21 06:14:14,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 06:14:14,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786474818] [2022-07-21 06:14:14,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 06:14:14,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 06:14:14,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:14:14,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 06:14:14,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 06:14:14,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786474818] [2022-07-21 06:14:14,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786474818] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 06:14:14,723 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 06:14:14,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 06:14:14,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066014296] [2022-07-21 06:14:14,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 06:14:14,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 06:14:14,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 06:14:14,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 06:14:14,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 06:14:14,726 INFO L87 Difference]: Start difference. First operand 1823 states and 2946 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 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) [2022-07-21 06:14:15,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 06:14:15,045 INFO L93 Difference]: Finished difference Result 5307 states and 8625 transitions. [2022-07-21 06:14:15,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 06:14:15,046 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 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 64 [2022-07-21 06:14:15,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 06:14:15,060 INFO L225 Difference]: With dead ends: 5307 [2022-07-21 06:14:15,061 INFO L226 Difference]: Without dead ends: 3535 [2022-07-21 06:14:15,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 06:14:15,068 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 456 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 456 SdHoareTripleChecker+Valid, 711 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 06:14:15,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [456 Valid, 711 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 06:14:15,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3535 states. [2022-07-21 06:14:15,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3535 to 2667. [2022-07-21 06:14:15,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2667 states, 2666 states have (on average 1.6151537884471119) internal successors, (4306), 2666 states have internal predecessors, (4306), 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) [2022-07-21 06:14:15,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2667 states to 2667 states and 4306 transitions. [2022-07-21 06:14:15,329 INFO L78 Accepts]: Start accepts. Automaton has 2667 states and 4306 transitions. Word has length 64 [2022-07-21 06:14:15,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 06:14:15,329 INFO L495 AbstractCegarLoop]: Abstraction has 2667 states and 4306 transitions. [2022-07-21 06:14:15,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 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) [2022-07-21 06:14:15,330 INFO L276 IsEmpty]: Start isEmpty. Operand 2667 states and 4306 transitions. [2022-07-21 06:14:15,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-21 06:14:15,332 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 06:14:15,332 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 06:14:15,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-21 06:14:15,333 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 06:14:15,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 06:14:15,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1354495973, now seen corresponding path program 1 times [2022-07-21 06:14:15,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 06:14:15,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572366104] [2022-07-21 06:14:15,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 06:14:15,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 06:14:15,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:14:15,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 06:14:15,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 06:14:15,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572366104] [2022-07-21 06:14:15,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572366104] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 06:14:15,420 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 06:14:15,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 06:14:15,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895118277] [2022-07-21 06:14:15,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 06:14:15,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 06:14:15,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 06:14:15,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 06:14:15,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 06:14:15,422 INFO L87 Difference]: Start difference. First operand 2667 states and 4306 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 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) [2022-07-21 06:14:15,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 06:14:15,828 INFO L93 Difference]: Finished difference Result 7707 states and 12501 transitions. [2022-07-21 06:14:15,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 06:14:15,828 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 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 65 [2022-07-21 06:14:15,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 06:14:15,849 INFO L225 Difference]: With dead ends: 7707 [2022-07-21 06:14:15,849 INFO L226 Difference]: Without dead ends: 5091 [2022-07-21 06:14:15,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 06:14:15,860 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 454 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 454 SdHoareTripleChecker+Valid, 754 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 06:14:15,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [454 Valid, 754 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 06:14:15,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5091 states. [2022-07-21 06:14:16,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5091 to 3863. [2022-07-21 06:14:16,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3863 states, 3862 states have (on average 1.6126359399274988) internal successors, (6228), 3862 states have internal predecessors, (6228), 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) [2022-07-21 06:14:16,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3863 states to 3863 states and 6228 transitions. [2022-07-21 06:14:16,253 INFO L78 Accepts]: Start accepts. Automaton has 3863 states and 6228 transitions. Word has length 65 [2022-07-21 06:14:16,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 06:14:16,253 INFO L495 AbstractCegarLoop]: Abstraction has 3863 states and 6228 transitions. [2022-07-21 06:14:16,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 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) [2022-07-21 06:14:16,254 INFO L276 IsEmpty]: Start isEmpty. Operand 3863 states and 6228 transitions. [2022-07-21 06:14:16,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-21 06:14:16,256 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 06:14:16,256 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 06:14:16,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-21 06:14:16,257 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 06:14:16,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 06:14:16,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1658042238, now seen corresponding path program 1 times [2022-07-21 06:14:16,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 06:14:16,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617608983] [2022-07-21 06:14:16,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 06:14:16,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 06:14:16,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:14:16,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 06:14:16,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 06:14:16,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617608983] [2022-07-21 06:14:16,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617608983] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 06:14:16,314 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 06:14:16,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 06:14:16,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701166965] [2022-07-21 06:14:16,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 06:14:16,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 06:14:16,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 06:14:16,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 06:14:16,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 06:14:16,317 INFO L87 Difference]: Start difference. First operand 3863 states and 6228 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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) [2022-07-21 06:14:16,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 06:14:16,714 INFO L93 Difference]: Finished difference Result 8640 states and 14034 transitions. [2022-07-21 06:14:16,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 06:14:16,714 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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 66 [2022-07-21 06:14:16,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 06:14:16,739 INFO L225 Difference]: With dead ends: 8640 [2022-07-21 06:14:16,740 INFO L226 Difference]: Without dead ends: 5875 [2022-07-21 06:14:16,747 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 [2022-07-21 06:14:16,748 INFO L413 NwaCegarLoop]: 332 mSDtfsCounter, 138 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 06:14:16,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 524 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 06:14:16,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5875 states. [2022-07-21 06:14:17,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5875 to 5873. [2022-07-21 06:14:17,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5873 states, 5872 states have (on average 1.6130790190735695) internal successors, (9472), 5872 states have internal predecessors, (9472), 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) [2022-07-21 06:14:17,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5873 states to 5873 states and 9472 transitions. [2022-07-21 06:14:17,244 INFO L78 Accepts]: Start accepts. Automaton has 5873 states and 9472 transitions. Word has length 66 [2022-07-21 06:14:17,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 06:14:17,244 INFO L495 AbstractCegarLoop]: Abstraction has 5873 states and 9472 transitions. [2022-07-21 06:14:17,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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) [2022-07-21 06:14:17,245 INFO L276 IsEmpty]: Start isEmpty. Operand 5873 states and 9472 transitions. [2022-07-21 06:14:17,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-21 06:14:17,246 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 06:14:17,246 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 06:14:17,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-21 06:14:17,247 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 06:14:17,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 06:14:17,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1876407130, now seen corresponding path program 1 times [2022-07-21 06:14:17,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 06:14:17,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16430274] [2022-07-21 06:14:17,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 06:14:17,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 06:14:17,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:14:17,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 06:14:17,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 06:14:17,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16430274] [2022-07-21 06:14:17,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16430274] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 06:14:17,284 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 06:14:17,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 06:14:17,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675818409] [2022-07-21 06:14:17,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 06:14:17,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 06:14:17,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 06:14:17,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 06:14:17,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 06:14:17,286 INFO L87 Difference]: Start difference. First operand 5873 states and 9472 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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) [2022-07-21 06:14:17,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 06:14:17,946 INFO L93 Difference]: Finished difference Result 12987 states and 20989 transitions. [2022-07-21 06:14:17,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 06:14:17,946 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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 66 [2022-07-21 06:14:17,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 06:14:17,980 INFO L225 Difference]: With dead ends: 12987 [2022-07-21 06:14:17,980 INFO L226 Difference]: Without dead ends: 8817 [2022-07-21 06:14:17,990 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 [2022-07-21 06:14:17,991 INFO L413 NwaCegarLoop]: 275 mSDtfsCounter, 126 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 06:14:17,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 469 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 06:14:18,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8817 states. [2022-07-21 06:14:18,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8817 to 8815. [2022-07-21 06:14:18,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8815 states, 8814 states have (on average 1.6056274109371456) internal successors, (14152), 8814 states have internal predecessors, (14152), 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) [2022-07-21 06:14:18,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8815 states to 8815 states and 14152 transitions. [2022-07-21 06:14:18,629 INFO L78 Accepts]: Start accepts. Automaton has 8815 states and 14152 transitions. Word has length 66 [2022-07-21 06:14:18,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 06:14:18,629 INFO L495 AbstractCegarLoop]: Abstraction has 8815 states and 14152 transitions. [2022-07-21 06:14:18,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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) [2022-07-21 06:14:18,630 INFO L276 IsEmpty]: Start isEmpty. Operand 8815 states and 14152 transitions. [2022-07-21 06:14:18,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-21 06:14:18,631 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 06:14:18,631 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 06:14:18,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-21 06:14:18,631 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 06:14:18,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 06:14:18,632 INFO L85 PathProgramCache]: Analyzing trace with hash -430026452, now seen corresponding path program 1 times [2022-07-21 06:14:18,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 06:14:18,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457322727] [2022-07-21 06:14:18,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 06:14:18,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 06:14:18,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:14:18,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 06:14:18,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 06:14:18,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457322727] [2022-07-21 06:14:18,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457322727] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 06:14:18,667 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 06:14:18,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 06:14:18,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287748738] [2022-07-21 06:14:18,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 06:14:18,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 06:14:18,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 06:14:18,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 06:14:18,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 06:14:18,669 INFO L87 Difference]: Start difference. First operand 8815 states and 14152 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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) [2022-07-21 06:14:19,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 06:14:19,573 INFO L93 Difference]: Finished difference Result 19164 states and 30838 transitions. [2022-07-21 06:14:19,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 06:14:19,574 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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 66 [2022-07-21 06:14:19,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 06:14:19,612 INFO L225 Difference]: With dead ends: 19164 [2022-07-21 06:14:19,613 INFO L226 Difference]: Without dead ends: 12900 [2022-07-21 06:14:19,628 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 [2022-07-21 06:14:19,629 INFO L413 NwaCegarLoop]: 316 mSDtfsCounter, 132 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 06:14:19,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 509 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 06:14:19,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12900 states. [2022-07-21 06:14:20,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12900 to 12898. [2022-07-21 06:14:20,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12898 states, 12897 states have (on average 1.5971931456927968) internal successors, (20599), 12897 states have internal predecessors, (20599), 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) [2022-07-21 06:14:20,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12898 states to 12898 states and 20599 transitions. [2022-07-21 06:14:20,659 INFO L78 Accepts]: Start accepts. Automaton has 12898 states and 20599 transitions. Word has length 66 [2022-07-21 06:14:20,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 06:14:20,659 INFO L495 AbstractCegarLoop]: Abstraction has 12898 states and 20599 transitions. [2022-07-21 06:14:20,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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) [2022-07-21 06:14:20,660 INFO L276 IsEmpty]: Start isEmpty. Operand 12898 states and 20599 transitions. [2022-07-21 06:14:20,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-21 06:14:20,661 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 06:14:20,661 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 06:14:20,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-21 06:14:20,662 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 06:14:20,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 06:14:20,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1812850740, now seen corresponding path program 1 times [2022-07-21 06:14:20,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 06:14:20,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632975915] [2022-07-21 06:14:20,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 06:14:20,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 06:14:20,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:14:20,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 06:14:20,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 06:14:20,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632975915] [2022-07-21 06:14:20,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632975915] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 06:14:20,801 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 06:14:20,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 06:14:20,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153400039] [2022-07-21 06:14:20,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 06:14:20,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 06:14:20,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 06:14:20,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 06:14:20,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 06:14:20,804 INFO L87 Difference]: Start difference. First operand 12898 states and 20599 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 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) [2022-07-21 06:14:21,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 06:14:21,862 INFO L93 Difference]: Finished difference Result 25713 states and 41080 transitions. [2022-07-21 06:14:21,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 06:14:21,863 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 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 67 [2022-07-21 06:14:21,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 06:14:21,903 INFO L225 Difference]: With dead ends: 25713 [2022-07-21 06:14:21,903 INFO L226 Difference]: Without dead ends: 12900 [2022-07-21 06:14:21,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-21 06:14:21,929 INFO L413 NwaCegarLoop]: 223 mSDtfsCounter, 199 mSDsluCounter, 591 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 814 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 06:14:21,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 814 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 06:14:21,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12900 states. [2022-07-21 06:14:22,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12900 to 12898. [2022-07-21 06:14:22,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12898 states, 12897 states have (on average 1.5875009692176476) internal successors, (20474), 12897 states have internal predecessors, (20474), 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) [2022-07-21 06:14:22,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12898 states to 12898 states and 20474 transitions. [2022-07-21 06:14:22,868 INFO L78 Accepts]: Start accepts. Automaton has 12898 states and 20474 transitions. Word has length 67 [2022-07-21 06:14:22,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 06:14:22,868 INFO L495 AbstractCegarLoop]: Abstraction has 12898 states and 20474 transitions. [2022-07-21 06:14:22,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 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) [2022-07-21 06:14:22,869 INFO L276 IsEmpty]: Start isEmpty. Operand 12898 states and 20474 transitions. [2022-07-21 06:14:22,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-07-21 06:14:22,869 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 06:14:22,870 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 06:14:22,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-21 06:14:22,870 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 06:14:22,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 06:14:22,871 INFO L85 PathProgramCache]: Analyzing trace with hash 528800646, now seen corresponding path program 1 times [2022-07-21 06:14:22,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 06:14:22,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937552019] [2022-07-21 06:14:22,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 06:14:22,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 06:14:22,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:14:22,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 06:14:22,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 06:14:22,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937552019] [2022-07-21 06:14:22,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937552019] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 06:14:22,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 06:14:22,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 06:14:22,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771691152] [2022-07-21 06:14:22,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 06:14:22,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 06:14:22,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 06:14:22,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 06:14:22,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 06:14:22,951 INFO L87 Difference]: Start difference. First operand 12898 states and 20474 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 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) [2022-07-21 06:14:25,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 06:14:25,282 INFO L93 Difference]: Finished difference Result 36933 states and 58774 transitions. [2022-07-21 06:14:25,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 06:14:25,282 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 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 70 [2022-07-21 06:14:25,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 06:14:25,338 INFO L225 Difference]: With dead ends: 36933 [2022-07-21 06:14:25,338 INFO L226 Difference]: Without dead ends: 24120 [2022-07-21 06:14:25,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-21 06:14:25,362 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 449 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 623 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 06:14:25,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [449 Valid, 623 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 06:14:25,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24120 states. [2022-07-21 06:14:27,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24120 to 24118. [2022-07-21 06:14:27,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24118 states, 24117 states have (on average 1.5768545009744164) internal successors, (38029), 24117 states have internal predecessors, (38029), 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) [2022-07-21 06:14:27,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24118 states to 24118 states and 38029 transitions. [2022-07-21 06:14:27,289 INFO L78 Accepts]: Start accepts. Automaton has 24118 states and 38029 transitions. Word has length 70 [2022-07-21 06:14:27,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 06:14:27,289 INFO L495 AbstractCegarLoop]: Abstraction has 24118 states and 38029 transitions. [2022-07-21 06:14:27,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 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) [2022-07-21 06:14:27,290 INFO L276 IsEmpty]: Start isEmpty. Operand 24118 states and 38029 transitions. [2022-07-21 06:14:27,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-21 06:14:27,291 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 06:14:27,291 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 06:14:27,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-21 06:14:27,291 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 06:14:27,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 06:14:27,292 INFO L85 PathProgramCache]: Analyzing trace with hash -788958455, now seen corresponding path program 1 times [2022-07-21 06:14:27,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 06:14:27,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330369602] [2022-07-21 06:14:27,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 06:14:27,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 06:14:27,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:14:27,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 06:14:27,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 06:14:27,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330369602] [2022-07-21 06:14:27,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330369602] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 06:14:27,391 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 06:14:27,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 06:14:27,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107383289] [2022-07-21 06:14:27,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 06:14:27,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 06:14:27,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 06:14:27,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 06:14:27,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 06:14:27,393 INFO L87 Difference]: Start difference. First operand 24118 states and 38029 transitions. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 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) [2022-07-21 06:14:30,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 06:14:30,888 INFO L93 Difference]: Finished difference Result 46045 states and 72310 transitions. [2022-07-21 06:14:30,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 06:14:30,894 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 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 71 [2022-07-21 06:14:30,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 06:14:31,014 INFO L225 Difference]: With dead ends: 46045 [2022-07-21 06:14:31,014 INFO L226 Difference]: Without dead ends: 46043 [2022-07-21 06:14:31,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-21 06:14:31,033 INFO L413 NwaCegarLoop]: 314 mSDtfsCounter, 286 mSDsluCounter, 756 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 1070 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 06:14:31,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 1070 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 06:14:31,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46043 states. [2022-07-21 06:14:34,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46043 to 24842. [2022-07-21 06:14:34,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24842 states, 24841 states have (on average 1.5596795620144117) internal successors, (38744), 24841 states have internal predecessors, (38744), 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) [2022-07-21 06:14:34,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24842 states to 24842 states and 38744 transitions. [2022-07-21 06:14:34,195 INFO L78 Accepts]: Start accepts. Automaton has 24842 states and 38744 transitions. Word has length 71 [2022-07-21 06:14:34,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 06:14:34,195 INFO L495 AbstractCegarLoop]: Abstraction has 24842 states and 38744 transitions. [2022-07-21 06:14:34,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 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) [2022-07-21 06:14:34,196 INFO L276 IsEmpty]: Start isEmpty. Operand 24842 states and 38744 transitions. [2022-07-21 06:14:34,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-07-21 06:14:34,198 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 06:14:34,198 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 06:14:34,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-21 06:14:34,202 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 06:14:34,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 06:14:34,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1288596918, now seen corresponding path program 1 times [2022-07-21 06:14:34,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 06:14:34,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360815974] [2022-07-21 06:14:34,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 06:14:34,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 06:14:34,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:14:34,374 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 06:14:34,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 06:14:34,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360815974] [2022-07-21 06:14:34,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360815974] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 06:14:34,375 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 06:14:34,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 06:14:34,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426897228] [2022-07-21 06:14:34,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 06:14:34,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 06:14:34,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 06:14:34,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 06:14:34,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-21 06:14:34,377 INFO L87 Difference]: Start difference. First operand 24842 states and 38744 transitions. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 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) [2022-07-21 06:14:38,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 06:14:38,896 INFO L93 Difference]: Finished difference Result 60730 states and 95066 transitions. [2022-07-21 06:14:38,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 06:14:38,897 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 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 97 [2022-07-21 06:14:38,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 06:14:39,030 INFO L225 Difference]: With dead ends: 60730 [2022-07-21 06:14:39,031 INFO L226 Difference]: Without dead ends: 48768 [2022-07-21 06:14:39,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-21 06:14:39,067 INFO L413 NwaCegarLoop]: 362 mSDtfsCounter, 576 mSDsluCounter, 663 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 576 SdHoareTripleChecker+Valid, 1025 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 06:14:39,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [576 Valid, 1025 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 06:14:39,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48768 states. [2022-07-21 06:14:42,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48768 to 38122. [2022-07-21 06:14:42,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38122 states, 38121 states have (on average 1.5579864116890954) internal successors, (59392), 38121 states have internal predecessors, (59392), 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) [2022-07-21 06:14:42,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38122 states to 38122 states and 59392 transitions. [2022-07-21 06:14:42,935 INFO L78 Accepts]: Start accepts. Automaton has 38122 states and 59392 transitions. Word has length 97 [2022-07-21 06:14:42,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 06:14:42,936 INFO L495 AbstractCegarLoop]: Abstraction has 38122 states and 59392 transitions. [2022-07-21 06:14:42,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 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) [2022-07-21 06:14:42,936 INFO L276 IsEmpty]: Start isEmpty. Operand 38122 states and 59392 transitions. [2022-07-21 06:14:42,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-07-21 06:14:42,939 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 06:14:42,939 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 06:14:42,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-21 06:14:42,940 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 06:14:42,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 06:14:42,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1070232026, now seen corresponding path program 1 times [2022-07-21 06:14:42,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 06:14:42,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948100900] [2022-07-21 06:14:42,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 06:14:42,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 06:14:42,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:14:43,035 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-21 06:14:43,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 06:14:43,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948100900] [2022-07-21 06:14:43,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948100900] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 06:14:43,036 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 06:14:43,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 06:14:43,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858230724] [2022-07-21 06:14:43,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 06:14:43,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 06:14:43,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 06:14:43,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 06:14:43,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-21 06:14:43,038 INFO L87 Difference]: Start difference. First operand 38122 states and 59392 transitions. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 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) [2022-07-21 06:14:48,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 06:14:48,821 INFO L93 Difference]: Finished difference Result 68116 states and 106638 transitions. [2022-07-21 06:14:48,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 06:14:48,822 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 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 97 [2022-07-21 06:14:48,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 06:14:48,980 INFO L225 Difference]: With dead ends: 68116 [2022-07-21 06:14:48,980 INFO L226 Difference]: Without dead ends: 56384 [2022-07-21 06:14:49,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-21 06:14:49,015 INFO L413 NwaCegarLoop]: 374 mSDtfsCounter, 587 mSDsluCounter, 654 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 587 SdHoareTripleChecker+Valid, 1028 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 06:14:49,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [587 Valid, 1028 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 06:14:49,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56384 states. [2022-07-21 06:14:54,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56384 to 51626. [2022-07-21 06:14:54,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51626 states, 51625 states have (on average 1.5596707021791767) internal successors, (80518), 51625 states have internal predecessors, (80518), 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) [2022-07-21 06:14:54,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51626 states to 51626 states and 80518 transitions. [2022-07-21 06:14:54,947 INFO L78 Accepts]: Start accepts. Automaton has 51626 states and 80518 transitions. Word has length 97 [2022-07-21 06:14:54,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 06:14:54,947 INFO L495 AbstractCegarLoop]: Abstraction has 51626 states and 80518 transitions. [2022-07-21 06:14:54,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 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) [2022-07-21 06:14:54,947 INFO L276 IsEmpty]: Start isEmpty. Operand 51626 states and 80518 transitions. [2022-07-21 06:14:54,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-07-21 06:14:54,950 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 06:14:54,950 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 06:14:54,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-21 06:14:54,951 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 06:14:54,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 06:14:54,951 INFO L85 PathProgramCache]: Analyzing trace with hash 918301688, now seen corresponding path program 1 times [2022-07-21 06:14:54,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 06:14:54,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61545524] [2022-07-21 06:14:54,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 06:14:54,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 06:14:54,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:14:55,023 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-21 06:14:55,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 06:14:55,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61545524] [2022-07-21 06:14:55,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61545524] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 06:14:55,026 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 06:14:55,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 06:14:55,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716403272] [2022-07-21 06:14:55,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 06:14:55,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 06:14:55,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 06:14:55,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 06:14:55,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-21 06:14:55,028 INFO L87 Difference]: Start difference. First operand 51626 states and 80518 transitions. Second operand has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 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) [2022-07-21 06:15:01,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 06:15:01,545 INFO L93 Difference]: Finished difference Result 72776 states and 113938 transitions. [2022-07-21 06:15:01,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 06:15:01,546 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 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 97 [2022-07-21 06:15:01,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 06:15:01,731 INFO L225 Difference]: With dead ends: 72776 [2022-07-21 06:15:01,731 INFO L226 Difference]: Without dead ends: 61044 [2022-07-21 06:15:01,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-21 06:15:01,765 INFO L413 NwaCegarLoop]: 376 mSDtfsCounter, 582 mSDsluCounter, 750 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 582 SdHoareTripleChecker+Valid, 1126 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 06:15:01,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [582 Valid, 1126 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 06:15:01,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61044 states.