./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem17_label45.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem17_label45.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 bad588c9542390857efe8d001f4c41a270c4260c6e96db502f4ea1506acc7b02 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 13:18:10,929 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 13:18:10,931 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 13:18:10,958 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 13:18:10,959 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 13:18:10,961 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 13:18:10,964 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 13:18:10,966 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 13:18:10,967 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 13:18:10,970 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 13:18:10,970 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 13:18:10,972 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 13:18:10,972 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 13:18:10,974 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 13:18:10,975 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 13:18:10,976 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 13:18:10,977 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 13:18:10,978 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 13:18:10,980 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 13:18:10,984 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 13:18:10,985 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 13:18:10,986 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 13:18:10,987 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 13:18:10,987 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 13:18:10,988 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 13:18:10,993 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 13:18:10,993 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 13:18:10,993 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 13:18:10,994 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 13:18:10,995 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 13:18:10,995 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 13:18:10,996 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 13:18:10,997 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 13:18:10,997 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 13:18:10,997 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 13:18:10,998 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 13:18:10,998 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 13:18:10,999 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 13:18:10,999 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 13:18:10,999 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 13:18:11,000 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 13:18:11,002 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 13:18:11,003 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 13:18:11,025 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 13:18:11,025 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 13:18:11,026 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 13:18:11,026 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 13:18:11,026 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 13:18:11,027 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 13:18:11,027 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 13:18:11,027 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 13:18:11,027 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 13:18:11,028 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 13:18:11,028 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 13:18:11,028 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 13:18:11,028 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 13:18:11,029 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 13:18:11,029 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 13:18:11,029 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 13:18:11,029 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 13:18:11,029 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 13:18:11,029 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 13:18:11,029 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 13:18:11,030 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 13:18:11,030 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 13:18:11,030 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 13:18:11,030 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 13:18:11,030 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 13:18:11,030 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 13:18:11,031 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 13:18:11,031 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 13:18:11,031 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 13:18:11,031 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 13:18:11,031 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 13:18:11,031 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 13:18:11,032 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 13:18:11,032 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bad588c9542390857efe8d001f4c41a270c4260c6e96db502f4ea1506acc7b02 [2022-07-13 13:18:11,214 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 13:18:11,229 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 13:18:11,230 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 13:18:11,231 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 13:18:11,231 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 13:18:11,232 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem17_label45.c [2022-07-13 13:18:11,273 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b4e1835db/42300cf4c16946ac8e8d4d133c241d54/FLAGa4a28c7c9 [2022-07-13 13:18:11,715 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 13:18:11,716 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label45.c [2022-07-13 13:18:11,734 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b4e1835db/42300cf4c16946ac8e8d4d133c241d54/FLAGa4a28c7c9 [2022-07-13 13:18:12,020 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b4e1835db/42300cf4c16946ac8e8d4d133c241d54 [2022-07-13 13:18:12,023 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 13:18:12,024 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 13:18:12,026 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 13:18:12,026 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 13:18:12,028 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 13:18:12,029 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 01:18:12" (1/1) ... [2022-07-13 13:18:12,030 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1928fda4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:18:12, skipping insertion in model container [2022-07-13 13:18:12,030 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 01:18:12" (1/1) ... [2022-07-13 13:18:12,035 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 13:18:12,090 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 13:18:12,287 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label45.c[7434,7447] [2022-07-13 13:18:12,699 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 13:18:12,705 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 13:18:12,727 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label45.c[7434,7447] [2022-07-13 13:18:12,891 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 13:18:12,902 INFO L208 MainTranslator]: Completed translation [2022-07-13 13:18:12,903 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:18:12 WrapperNode [2022-07-13 13:18:12,903 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 13:18:12,904 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 13:18:12,904 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 13:18:12,904 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 13:18:12,909 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:18:12" (1/1) ... [2022-07-13 13:18:12,948 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:18:12" (1/1) ... [2022-07-13 13:18:13,160 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 2611 [2022-07-13 13:18:13,161 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 13:18:13,161 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 13:18:13,161 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 13:18:13,162 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 13:18:13,167 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:18:12" (1/1) ... [2022-07-13 13:18:13,168 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:18:12" (1/1) ... [2022-07-13 13:18:13,216 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:18:12" (1/1) ... [2022-07-13 13:18:13,216 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:18:12" (1/1) ... [2022-07-13 13:18:13,350 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:18:12" (1/1) ... [2022-07-13 13:18:13,368 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:18:12" (1/1) ... [2022-07-13 13:18:13,392 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:18:12" (1/1) ... [2022-07-13 13:18:13,414 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 13:18:13,416 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 13:18:13,416 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 13:18:13,416 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 13:18:13,417 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:18:12" (1/1) ... [2022-07-13 13:18:13,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 13:18:13,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 13:18:13,438 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) [2022-07-13 13:18:13,448 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 [2022-07-13 13:18:13,469 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 13:18:13,470 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 13:18:13,470 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 13:18:13,470 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 13:18:13,513 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 13:18:13,514 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 13:18:15,740 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 13:18:15,748 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 13:18:15,748 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-13 13:18:15,750 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 01:18:15 BoogieIcfgContainer [2022-07-13 13:18:15,750 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 13:18:15,751 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 13:18:15,751 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 13:18:15,753 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 13:18:15,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 01:18:12" (1/3) ... [2022-07-13 13:18:15,754 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68f1638a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 01:18:15, skipping insertion in model container [2022-07-13 13:18:15,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:18:12" (2/3) ... [2022-07-13 13:18:15,755 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68f1638a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 01:18:15, skipping insertion in model container [2022-07-13 13:18:15,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 01:18:15" (3/3) ... [2022-07-13 13:18:15,755 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label45.c [2022-07-13 13:18:15,764 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 13:18:15,765 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 13:18:15,801 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 13:18:15,805 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@1846ce92, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@36ca749 [2022-07-13 13:18:15,805 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 13:18:15,817 INFO L276 IsEmpty]: Start isEmpty. Operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 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) [2022-07-13 13:18:15,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-13 13:18:15,823 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:18:15,824 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] [2022-07-13 13:18:15,824 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:18:15,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:18:15,828 INFO L85 PathProgramCache]: Analyzing trace with hash 761214138, now seen corresponding path program 1 times [2022-07-13 13:18:15,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:18:15,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104027965] [2022-07-13 13:18:15,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:18:15,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:18:15,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:18:16,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 13:18:16,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:18:16,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104027965] [2022-07-13 13:18:16,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104027965] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:18:16,044 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:18:16,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 13:18:16,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778387908] [2022-07-13 13:18:16,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:18:16,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:18:16,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:18:16,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:18:16,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:18:16,079 INFO L87 Difference]: Start difference. First operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 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 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 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) [2022-07-13 13:18:18,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:18:18,306 INFO L93 Difference]: Finished difference Result 1642 states and 3024 transitions. [2022-07-13 13:18:18,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:18:18,308 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 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 50 [2022-07-13 13:18:18,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:18:18,321 INFO L225 Difference]: With dead ends: 1642 [2022-07-13 13:18:18,321 INFO L226 Difference]: Without dead ends: 975 [2022-07-13 13:18:18,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:18:18,328 INFO L413 NwaCegarLoop]: 474 mSDtfsCounter, 440 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 1413 mSolverCounterSat, 372 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 1785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 372 IncrementalHoareTripleChecker+Valid, 1413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-13 13:18:18,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [440 Valid, 550 Invalid, 1785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [372 Valid, 1413 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-07-13 13:18:18,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2022-07-13 13:18:18,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 972. [2022-07-13 13:18:18,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 972 states, 971 states have (on average 1.5077239958805355) internal successors, (1464), 971 states have internal predecessors, (1464), 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) [2022-07-13 13:18:18,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 972 states to 972 states and 1464 transitions. [2022-07-13 13:18:18,397 INFO L78 Accepts]: Start accepts. Automaton has 972 states and 1464 transitions. Word has length 50 [2022-07-13 13:18:18,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:18:18,398 INFO L495 AbstractCegarLoop]: Abstraction has 972 states and 1464 transitions. [2022-07-13 13:18:18,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 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) [2022-07-13 13:18:18,398 INFO L276 IsEmpty]: Start isEmpty. Operand 972 states and 1464 transitions. [2022-07-13 13:18:18,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-07-13 13:18:18,402 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:18:18,402 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:18:18,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 13:18:18,402 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:18:18,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:18:18,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1698886982, now seen corresponding path program 1 times [2022-07-13 13:18:18,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:18:18,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275182374] [2022-07-13 13:18:18,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:18:18,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:18:18,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:18:18,539 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 13:18:18,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:18:18,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275182374] [2022-07-13 13:18:18,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275182374] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:18:18,540 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:18:18,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:18:18,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561153377] [2022-07-13 13:18:18,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:18:18,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:18:18,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:18:18,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:18:18,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:18:18,543 INFO L87 Difference]: Start difference. First operand 972 states and 1464 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 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) [2022-07-13 13:18:20,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:18:20,425 INFO L93 Difference]: Finished difference Result 2814 states and 4242 transitions. [2022-07-13 13:18:20,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:18:20,436 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 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 120 [2022-07-13 13:18:20,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:18:20,442 INFO L225 Difference]: With dead ends: 2814 [2022-07-13 13:18:20,442 INFO L226 Difference]: Without dead ends: 1844 [2022-07-13 13:18:20,444 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 [2022-07-13 13:18:20,456 INFO L413 NwaCegarLoop]: 853 mSDtfsCounter, 441 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 1283 mSolverCounterSat, 414 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 921 SdHoareTripleChecker+Invalid, 1697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 414 IncrementalHoareTripleChecker+Valid, 1283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-13 13:18:20,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [441 Valid, 921 Invalid, 1697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [414 Valid, 1283 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-13 13:18:20,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2022-07-13 13:18:20,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 1842. [2022-07-13 13:18:20,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1842 states, 1841 states have (on average 1.3601303639326452) internal successors, (2504), 1841 states have internal predecessors, (2504), 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) [2022-07-13 13:18:20,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1842 states to 1842 states and 2504 transitions. [2022-07-13 13:18:20,495 INFO L78 Accepts]: Start accepts. Automaton has 1842 states and 2504 transitions. Word has length 120 [2022-07-13 13:18:20,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:18:20,497 INFO L495 AbstractCegarLoop]: Abstraction has 1842 states and 2504 transitions. [2022-07-13 13:18:20,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 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) [2022-07-13 13:18:20,498 INFO L276 IsEmpty]: Start isEmpty. Operand 1842 states and 2504 transitions. [2022-07-13 13:18:20,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-07-13 13:18:20,508 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:18:20,509 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:18:20,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 13:18:20,511 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:18:20,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:18:20,512 INFO L85 PathProgramCache]: Analyzing trace with hash -859485079, now seen corresponding path program 1 times [2022-07-13 13:18:20,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:18:20,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182785654] [2022-07-13 13:18:20,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:18:20,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:18:20,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:18:20,655 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 13:18:20,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:18:20,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182785654] [2022-07-13 13:18:20,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182785654] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:18:20,657 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:18:20,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 13:18:20,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504996621] [2022-07-13 13:18:20,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:18:20,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:18:20,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:18:20,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:18:20,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:18:20,660 INFO L87 Difference]: Start difference. First operand 1842 states and 2504 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 2 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:18:22,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:18:22,200 INFO L93 Difference]: Finished difference Result 5395 states and 7326 transitions. [2022-07-13 13:18:22,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:18:22,200 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 2 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 142 [2022-07-13 13:18:22,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:18:22,209 INFO L225 Difference]: With dead ends: 5395 [2022-07-13 13:18:22,209 INFO L226 Difference]: Without dead ends: 2701 [2022-07-13 13:18:22,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:18:22,213 INFO L413 NwaCegarLoop]: 516 mSDtfsCounter, 368 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 1629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-13 13:18:22,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [368 Valid, 591 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-13 13:18:22,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2701 states. [2022-07-13 13:18:22,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2701 to 2701. [2022-07-13 13:18:22,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2701 states, 2700 states have (on average 1.191851851851852) internal successors, (3218), 2700 states have internal predecessors, (3218), 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) [2022-07-13 13:18:22,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2701 states to 2701 states and 3218 transitions. [2022-07-13 13:18:22,243 INFO L78 Accepts]: Start accepts. Automaton has 2701 states and 3218 transitions. Word has length 142 [2022-07-13 13:18:22,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:18:22,243 INFO L495 AbstractCegarLoop]: Abstraction has 2701 states and 3218 transitions. [2022-07-13 13:18:22,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 2 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:18:22,244 INFO L276 IsEmpty]: Start isEmpty. Operand 2701 states and 3218 transitions. [2022-07-13 13:18:22,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2022-07-13 13:18:22,245 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:18:22,245 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:18:22,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 13:18:22,245 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:18:22,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:18:22,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1759632867, now seen corresponding path program 1 times [2022-07-13 13:18:22,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:18:22,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430438580] [2022-07-13 13:18:22,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:18:22,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:18:22,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:18:22,322 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 163 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 13:18:22,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:18:22,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430438580] [2022-07-13 13:18:22,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430438580] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:18:22,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:18:22,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:18:22,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705584603] [2022-07-13 13:18:22,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:18:22,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:18:22,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:18:22,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:18:22,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:18:22,325 INFO L87 Difference]: Start difference. First operand 2701 states and 3218 transitions. Second operand has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 3 states have internal predecessors, (202), 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) [2022-07-13 13:18:23,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:18:23,733 INFO L93 Difference]: Finished difference Result 7108 states and 8598 transitions. [2022-07-13 13:18:23,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:18:23,734 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 3 states have internal predecessors, (202), 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 202 [2022-07-13 13:18:23,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:18:23,746 INFO L225 Difference]: With dead ends: 7108 [2022-07-13 13:18:23,746 INFO L226 Difference]: Without dead ends: 4409 [2022-07-13 13:18:23,748 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 [2022-07-13 13:18:23,756 INFO L413 NwaCegarLoop]: 726 mSDtfsCounter, 496 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 1136 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 784 SdHoareTripleChecker+Invalid, 1442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 1136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-13 13:18:23,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [496 Valid, 784 Invalid, 1442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 1136 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-13 13:18:23,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4409 states. [2022-07-13 13:18:23,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4409 to 4409. [2022-07-13 13:18:23,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4409 states, 4408 states have (on average 1.1705989110707804) internal successors, (5160), 4408 states have internal predecessors, (5160), 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) [2022-07-13 13:18:23,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4409 states to 4409 states and 5160 transitions. [2022-07-13 13:18:23,811 INFO L78 Accepts]: Start accepts. Automaton has 4409 states and 5160 transitions. Word has length 202 [2022-07-13 13:18:23,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:18:23,812 INFO L495 AbstractCegarLoop]: Abstraction has 4409 states and 5160 transitions. [2022-07-13 13:18:23,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 3 states have internal predecessors, (202), 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) [2022-07-13 13:18:23,813 INFO L276 IsEmpty]: Start isEmpty. Operand 4409 states and 5160 transitions. [2022-07-13 13:18:23,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2022-07-13 13:18:23,814 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:18:23,815 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:18:23,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 13:18:23,815 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:18:23,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:18:23,816 INFO L85 PathProgramCache]: Analyzing trace with hash -686975016, now seen corresponding path program 1 times [2022-07-13 13:18:23,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:18:23,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816583745] [2022-07-13 13:18:23,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:18:23,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:18:23,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:18:23,926 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-07-13 13:18:23,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:18:23,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816583745] [2022-07-13 13:18:23,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816583745] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:18:23,927 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:18:23,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:18:23,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868283056] [2022-07-13 13:18:23,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:18:23,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:18:23,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:18:23,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:18:23,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:18:23,929 INFO L87 Difference]: Start difference. First operand 4409 states and 5160 transitions. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 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) [2022-07-13 13:18:25,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:18:25,415 INFO L93 Difference]: Finished difference Result 10936 states and 12970 transitions. [2022-07-13 13:18:25,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:18:25,419 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 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 204 [2022-07-13 13:18:25,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:18:25,435 INFO L225 Difference]: With dead ends: 10936 [2022-07-13 13:18:25,435 INFO L226 Difference]: Without dead ends: 6528 [2022-07-13 13:18:25,440 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 [2022-07-13 13:18:25,441 INFO L413 NwaCegarLoop]: 382 mSDtfsCounter, 401 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1215 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 1489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 1215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-13 13:18:25,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [401 Valid, 444 Invalid, 1489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 1215 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-13 13:18:25,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6528 states. [2022-07-13 13:18:25,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6528 to 4382. [2022-07-13 13:18:25,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4382 states, 4381 states have (on average 1.1684546907098836) internal successors, (5119), 4381 states have internal predecessors, (5119), 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) [2022-07-13 13:18:25,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4382 states to 4382 states and 5119 transitions. [2022-07-13 13:18:25,501 INFO L78 Accepts]: Start accepts. Automaton has 4382 states and 5119 transitions. Word has length 204 [2022-07-13 13:18:25,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:18:25,503 INFO L495 AbstractCegarLoop]: Abstraction has 4382 states and 5119 transitions. [2022-07-13 13:18:25,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 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) [2022-07-13 13:18:25,505 INFO L276 IsEmpty]: Start isEmpty. Operand 4382 states and 5119 transitions. [2022-07-13 13:18:25,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2022-07-13 13:18:25,507 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:18:25,508 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:18:25,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 13:18:25,508 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:18:25,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:18:25,509 INFO L85 PathProgramCache]: Analyzing trace with hash -959867106, now seen corresponding path program 1 times [2022-07-13 13:18:25,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:18:25,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606853619] [2022-07-13 13:18:25,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:18:25,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:18:25,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:18:25,654 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-07-13 13:18:25,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:18:25,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606853619] [2022-07-13 13:18:25,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606853619] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:18:25,655 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:18:25,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:18:25,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4939238] [2022-07-13 13:18:25,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:18:25,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:18:25,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:18:25,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:18:25,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:18:25,656 INFO L87 Difference]: Start difference. First operand 4382 states and 5119 transitions. Second operand has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 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) [2022-07-13 13:18:27,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:18:27,226 INFO L93 Difference]: Finished difference Result 10045 states and 11706 transitions. [2022-07-13 13:18:27,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:18:27,231 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 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 270 [2022-07-13 13:18:27,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:18:27,246 INFO L225 Difference]: With dead ends: 10045 [2022-07-13 13:18:27,246 INFO L226 Difference]: Without dead ends: 5665 [2022-07-13 13:18:27,251 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 [2022-07-13 13:18:27,252 INFO L413 NwaCegarLoop]: 833 mSDtfsCounter, 386 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 1342 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 894 SdHoareTripleChecker+Invalid, 1409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-13 13:18:27,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [386 Valid, 894 Invalid, 1409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1342 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-13 13:18:27,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5665 states. [2022-07-13 13:18:27,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5665 to 5234. [2022-07-13 13:18:27,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5234 states, 5233 states have (on average 1.1587999235620103) internal successors, (6064), 5233 states have internal predecessors, (6064), 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) [2022-07-13 13:18:27,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5234 states to 5234 states and 6064 transitions. [2022-07-13 13:18:27,313 INFO L78 Accepts]: Start accepts. Automaton has 5234 states and 6064 transitions. Word has length 270 [2022-07-13 13:18:27,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:18:27,314 INFO L495 AbstractCegarLoop]: Abstraction has 5234 states and 6064 transitions. [2022-07-13 13:18:27,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 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) [2022-07-13 13:18:27,314 INFO L276 IsEmpty]: Start isEmpty. Operand 5234 states and 6064 transitions. [2022-07-13 13:18:27,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2022-07-13 13:18:27,317 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:18:27,317 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:18:27,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-13 13:18:27,317 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:18:27,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:18:27,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1561562149, now seen corresponding path program 1 times [2022-07-13 13:18:27,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:18:27,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260217648] [2022-07-13 13:18:27,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:18:27,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:18:27,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:18:27,430 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 228 proven. 0 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2022-07-13 13:18:27,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:18:27,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260217648] [2022-07-13 13:18:27,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260217648] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:18:27,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:18:27,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:18:27,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957330615] [2022-07-13 13:18:27,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:18:27,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:18:27,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:18:27,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:18:27,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:18:27,432 INFO L87 Difference]: Start difference. First operand 5234 states and 6064 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 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) [2022-07-13 13:18:28,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:18:28,894 INFO L93 Difference]: Finished difference Result 12593 states and 14783 transitions. [2022-07-13 13:18:28,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:18:28,905 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 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 282 [2022-07-13 13:18:28,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:18:28,921 INFO L225 Difference]: With dead ends: 12593 [2022-07-13 13:18:28,921 INFO L226 Difference]: Without dead ends: 6936 [2022-07-13 13:18:28,926 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 [2022-07-13 13:18:28,927 INFO L413 NwaCegarLoop]: 778 mSDtfsCounter, 383 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 1199 mSolverCounterSat, 258 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 847 SdHoareTripleChecker+Invalid, 1457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 1199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-13 13:18:28,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [383 Valid, 847 Invalid, 1457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 1199 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-13 13:18:28,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6936 states. [2022-07-13 13:18:28,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6936 to 6936. [2022-07-13 13:18:29,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6936 states, 6935 states have (on average 1.1322278298485942) internal successors, (7852), 6935 states have internal predecessors, (7852), 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) [2022-07-13 13:18:29,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6936 states to 6936 states and 7852 transitions. [2022-07-13 13:18:29,013 INFO L78 Accepts]: Start accepts. Automaton has 6936 states and 7852 transitions. Word has length 282 [2022-07-13 13:18:29,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:18:29,014 INFO L495 AbstractCegarLoop]: Abstraction has 6936 states and 7852 transitions. [2022-07-13 13:18:29,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 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) [2022-07-13 13:18:29,015 INFO L276 IsEmpty]: Start isEmpty. Operand 6936 states and 7852 transitions. [2022-07-13 13:18:29,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2022-07-13 13:18:29,018 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:18:29,018 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-13 13:18:29,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-13 13:18:29,019 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:18:29,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:18:29,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1048618558, now seen corresponding path program 1 times [2022-07-13 13:18:29,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:18:29,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966714249] [2022-07-13 13:18:29,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:18:29,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:18:29,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:18:29,125 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 143 proven. 0 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2022-07-13 13:18:29,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:18:29,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966714249] [2022-07-13 13:18:29,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966714249] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:18:29,126 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:18:29,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:18:29,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764278791] [2022-07-13 13:18:29,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:18:29,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:18:29,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:18:29,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:18:29,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:18:29,127 INFO L87 Difference]: Start difference. First operand 6936 states and 7852 transitions. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 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) [2022-07-13 13:18:30,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:18:30,671 INFO L93 Difference]: Finished difference Result 17279 states and 19683 transitions. [2022-07-13 13:18:30,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:18:30,672 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 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 322 [2022-07-13 13:18:30,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:18:30,686 INFO L225 Difference]: With dead ends: 17279 [2022-07-13 13:18:30,686 INFO L226 Difference]: Without dead ends: 9468 [2022-07-13 13:18:30,693 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 [2022-07-13 13:18:30,694 INFO L413 NwaCegarLoop]: 610 mSDtfsCounter, 495 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 1183 mSolverCounterSat, 348 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 1531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 348 IncrementalHoareTripleChecker+Valid, 1183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-13 13:18:30,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [495 Valid, 640 Invalid, 1531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [348 Valid, 1183 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-13 13:18:30,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9468 states. [2022-07-13 13:18:30,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9468 to 9038. [2022-07-13 13:18:30,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9038 states, 9037 states have (on average 1.1249308398804914) internal successors, (10166), 9037 states have internal predecessors, (10166), 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) [2022-07-13 13:18:30,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9038 states to 9038 states and 10166 transitions. [2022-07-13 13:18:30,778 INFO L78 Accepts]: Start accepts. Automaton has 9038 states and 10166 transitions. Word has length 322 [2022-07-13 13:18:30,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:18:30,779 INFO L495 AbstractCegarLoop]: Abstraction has 9038 states and 10166 transitions. [2022-07-13 13:18:30,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 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) [2022-07-13 13:18:30,779 INFO L276 IsEmpty]: Start isEmpty. Operand 9038 states and 10166 transitions. [2022-07-13 13:18:30,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2022-07-13 13:18:30,784 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:18:30,784 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:18:30,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-13 13:18:30,784 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:18:30,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:18:30,785 INFO L85 PathProgramCache]: Analyzing trace with hash -474723312, now seen corresponding path program 1 times [2022-07-13 13:18:30,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:18:30,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834300585] [2022-07-13 13:18:30,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:18:30,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:18:30,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:18:30,971 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 13:18:30,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:18:30,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834300585] [2022-07-13 13:18:30,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834300585] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:18:30,972 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:18:30,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:18:30,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973562521] [2022-07-13 13:18:30,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:18:30,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 13:18:30,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:18:30,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 13:18:30,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 13:18:30,974 INFO L87 Difference]: Start difference. First operand 9038 states and 10166 transitions. Second operand has 4 states, 4 states have (on average 97.25) internal successors, (389), 3 states have internal predecessors, (389), 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) [2022-07-13 13:18:33,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:18:33,386 INFO L93 Difference]: Finished difference Result 26188 states and 29347 transitions. [2022-07-13 13:18:33,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 13:18:33,386 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 97.25) internal successors, (389), 3 states have internal predecessors, (389), 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 389 [2022-07-13 13:18:33,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:18:33,408 INFO L225 Difference]: With dead ends: 26188 [2022-07-13 13:18:33,408 INFO L226 Difference]: Without dead ends: 16727 [2022-07-13 13:18:33,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 13:18:33,418 INFO L413 NwaCegarLoop]: 261 mSDtfsCounter, 520 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 2684 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 520 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 2856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 2684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-13 13:18:33,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [520 Valid, 371 Invalid, 2856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 2684 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-07-13 13:18:33,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16727 states. [2022-07-13 13:18:33,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16727 to 16283. [2022-07-13 13:18:33,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16283 states, 16282 states have (on average 1.110920034393809) internal successors, (18088), 16282 states have internal predecessors, (18088), 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) [2022-07-13 13:18:33,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16283 states to 16283 states and 18088 transitions. [2022-07-13 13:18:33,636 INFO L78 Accepts]: Start accepts. Automaton has 16283 states and 18088 transitions. Word has length 389 [2022-07-13 13:18:33,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:18:33,636 INFO L495 AbstractCegarLoop]: Abstraction has 16283 states and 18088 transitions. [2022-07-13 13:18:33,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 97.25) internal successors, (389), 3 states have internal predecessors, (389), 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) [2022-07-13 13:18:33,637 INFO L276 IsEmpty]: Start isEmpty. Operand 16283 states and 18088 transitions. [2022-07-13 13:18:33,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2022-07-13 13:18:33,643 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:18:33,643 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:18:33,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-13 13:18:33,644 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:18:33,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:18:33,644 INFO L85 PathProgramCache]: Analyzing trace with hash 2212298, now seen corresponding path program 1 times [2022-07-13 13:18:33,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:18:33,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907738621] [2022-07-13 13:18:33,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:18:33,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:18:33,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:18:33,760 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 330 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-07-13 13:18:33,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:18:33,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907738621] [2022-07-13 13:18:33,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907738621] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:18:33,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:18:33,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:18:33,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140868234] [2022-07-13 13:18:33,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:18:33,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:18:33,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:18:33,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:18:33,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:18:33,762 INFO L87 Difference]: Start difference. First operand 16283 states and 18088 transitions. Second operand has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 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) [2022-07-13 13:18:35,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:18:35,290 INFO L93 Difference]: Finished difference Result 38973 states and 43494 transitions. [2022-07-13 13:18:35,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:18:35,291 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 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 393 [2022-07-13 13:18:35,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:18:35,320 INFO L225 Difference]: With dead ends: 38973 [2022-07-13 13:18:35,321 INFO L226 Difference]: Without dead ends: 22692 [2022-07-13 13:18:35,335 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 [2022-07-13 13:18:35,335 INFO L413 NwaCegarLoop]: 617 mSDtfsCounter, 349 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1281 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 654 SdHoareTripleChecker+Invalid, 1467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 1281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-13 13:18:35,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [349 Valid, 654 Invalid, 1467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 1281 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-13 13:18:35,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22692 states. [2022-07-13 13:18:35,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22692 to 21823. [2022-07-13 13:18:35,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21823 states, 21822 states have (on average 1.119420768032261) internal successors, (24428), 21822 states have internal predecessors, (24428), 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) [2022-07-13 13:18:35,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21823 states to 21823 states and 24428 transitions. [2022-07-13 13:18:35,621 INFO L78 Accepts]: Start accepts. Automaton has 21823 states and 24428 transitions. Word has length 393 [2022-07-13 13:18:35,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:18:35,621 INFO L495 AbstractCegarLoop]: Abstraction has 21823 states and 24428 transitions. [2022-07-13 13:18:35,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 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) [2022-07-13 13:18:35,622 INFO L276 IsEmpty]: Start isEmpty. Operand 21823 states and 24428 transitions. [2022-07-13 13:18:35,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2022-07-13 13:18:35,628 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:18:35,628 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:18:35,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-13 13:18:35,629 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:18:35,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:18:35,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1334255484, now seen corresponding path program 1 times [2022-07-13 13:18:35,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:18:35,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623983377] [2022-07-13 13:18:35,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:18:35,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:18:35,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:18:35,763 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 373 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-07-13 13:18:35,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:18:35,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623983377] [2022-07-13 13:18:35,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623983377] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:18:35,763 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:18:35,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:18:35,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807214574] [2022-07-13 13:18:35,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:18:35,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:18:35,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:18:35,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:18:35,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:18:35,765 INFO L87 Difference]: Start difference. First operand 21823 states and 24428 transitions. Second operand has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 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) [2022-07-13 13:18:37,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:18:37,175 INFO L93 Difference]: Finished difference Result 49189 states and 55550 transitions. [2022-07-13 13:18:37,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:18:37,175 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 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 436 [2022-07-13 13:18:37,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:18:37,210 INFO L225 Difference]: With dead ends: 49189 [2022-07-13 13:18:37,210 INFO L226 Difference]: Without dead ends: 26943 [2022-07-13 13:18:37,227 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 [2022-07-13 13:18:37,228 INFO L413 NwaCegarLoop]: 701 mSDtfsCounter, 313 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 1224 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 761 SdHoareTripleChecker+Invalid, 1383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 1224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-13 13:18:37,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [313 Valid, 761 Invalid, 1383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 1224 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-13 13:18:37,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26943 states. [2022-07-13 13:18:37,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26943 to 26936. [2022-07-13 13:18:37,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26936 states, 26935 states have (on average 1.1173937256357898) internal successors, (30097), 26935 states have internal predecessors, (30097), 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) [2022-07-13 13:18:37,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26936 states to 26936 states and 30097 transitions. [2022-07-13 13:18:37,604 INFO L78 Accepts]: Start accepts. Automaton has 26936 states and 30097 transitions. Word has length 436 [2022-07-13 13:18:37,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:18:37,604 INFO L495 AbstractCegarLoop]: Abstraction has 26936 states and 30097 transitions. [2022-07-13 13:18:37,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 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) [2022-07-13 13:18:37,605 INFO L276 IsEmpty]: Start isEmpty. Operand 26936 states and 30097 transitions. [2022-07-13 13:18:37,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2022-07-13 13:18:37,616 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:18:37,617 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:18:37,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-13 13:18:37,617 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:18:37,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:18:37,618 INFO L85 PathProgramCache]: Analyzing trace with hash -344888426, now seen corresponding path program 1 times [2022-07-13 13:18:37,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:18:37,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701691107] [2022-07-13 13:18:37,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:18:37,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:18:37,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:18:37,806 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 380 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-07-13 13:18:37,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:18:37,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701691107] [2022-07-13 13:18:37,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701691107] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:18:37,807 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:18:37,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:18:37,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425203518] [2022-07-13 13:18:37,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:18:37,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:18:37,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:18:37,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:18:37,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:18:37,809 INFO L87 Difference]: Start difference. First operand 26936 states and 30097 transitions. Second operand has 3 states, 3 states have (on average 122.66666666666667) internal successors, (368), 3 states have internal predecessors, (368), 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) [2022-07-13 13:18:39,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:18:39,311 INFO L93 Difference]: Finished difference Result 64094 states and 71471 transitions. [2022-07-13 13:18:39,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:18:39,312 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 122.66666666666667) internal successors, (368), 3 states have internal predecessors, (368), 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 449 [2022-07-13 13:18:39,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:18:39,352 INFO L225 Difference]: With dead ends: 64094 [2022-07-13 13:18:39,352 INFO L226 Difference]: Without dead ends: 37160 [2022-07-13 13:18:39,370 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 [2022-07-13 13:18:39,371 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 352 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 1169 mSolverCounterSat, 286 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 1455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 286 IncrementalHoareTripleChecker+Valid, 1169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-13 13:18:39,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [352 Valid, 153 Invalid, 1455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [286 Valid, 1169 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-13 13:18:39,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37160 states. [2022-07-13 13:18:39,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37160 to 29046. [2022-07-13 13:18:39,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29046 states, 29045 states have (on average 1.115751420210019) internal successors, (32407), 29045 states have internal predecessors, (32407), 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) [2022-07-13 13:18:39,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29046 states to 29046 states and 32407 transitions. [2022-07-13 13:18:39,718 INFO L78 Accepts]: Start accepts. Automaton has 29046 states and 32407 transitions. Word has length 449 [2022-07-13 13:18:39,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:18:39,718 INFO L495 AbstractCegarLoop]: Abstraction has 29046 states and 32407 transitions. [2022-07-13 13:18:39,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 122.66666666666667) internal successors, (368), 3 states have internal predecessors, (368), 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) [2022-07-13 13:18:39,719 INFO L276 IsEmpty]: Start isEmpty. Operand 29046 states and 32407 transitions. [2022-07-13 13:18:39,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 514 [2022-07-13 13:18:39,729 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:18:39,730 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:18:39,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-13 13:18:39,730 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:18:39,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:18:39,731 INFO L85 PathProgramCache]: Analyzing trace with hash 2118200343, now seen corresponding path program 1 times [2022-07-13 13:18:39,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:18:39,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209864076] [2022-07-13 13:18:39,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:18:39,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:18:39,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:18:39,912 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 498 proven. 0 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2022-07-13 13:18:39,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:18:39,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209864076] [2022-07-13 13:18:39,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209864076] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:18:39,913 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:18:39,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:18:39,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052612942] [2022-07-13 13:18:39,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:18:39,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:18:39,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:18:39,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:18:39,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:18:39,915 INFO L87 Difference]: Start difference. First operand 29046 states and 32407 transitions. Second operand has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 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) [2022-07-13 13:18:41,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:18:41,437 INFO L93 Difference]: Finished difference Result 67034 states and 74966 transitions. [2022-07-13 13:18:41,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:18:41,438 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 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 513 [2022-07-13 13:18:41,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:18:41,470 INFO L225 Difference]: With dead ends: 67034 [2022-07-13 13:18:41,470 INFO L226 Difference]: Without dead ends: 37990 [2022-07-13 13:18:41,483 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 [2022-07-13 13:18:41,484 INFO L413 NwaCegarLoop]: 292 mSDtfsCounter, 326 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1192 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 1370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 1192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-13 13:18:41,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [326 Valid, 344 Invalid, 1370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 1192 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-13 13:18:41,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37990 states. [2022-07-13 13:18:41,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37990 to 33301. [2022-07-13 13:18:41,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33301 states, 33300 states have (on average 1.10012012012012) internal successors, (36634), 33300 states have internal predecessors, (36634), 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) [2022-07-13 13:18:41,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33301 states to 33301 states and 36634 transitions. [2022-07-13 13:18:41,775 INFO L78 Accepts]: Start accepts. Automaton has 33301 states and 36634 transitions. Word has length 513 [2022-07-13 13:18:41,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:18:41,775 INFO L495 AbstractCegarLoop]: Abstraction has 33301 states and 36634 transitions. [2022-07-13 13:18:41,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 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) [2022-07-13 13:18:41,775 INFO L276 IsEmpty]: Start isEmpty. Operand 33301 states and 36634 transitions. [2022-07-13 13:18:41,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 568 [2022-07-13 13:18:41,788 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:18:41,788 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-13 13:18:41,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-13 13:18:41,789 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:18:41,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:18:41,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1612744574, now seen corresponding path program 1 times [2022-07-13 13:18:41,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:18:41,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246898782] [2022-07-13 13:18:41,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:18:41,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:18:41,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:18:42,015 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 610 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-07-13 13:18:42,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:18:42,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246898782] [2022-07-13 13:18:42,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246898782] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:18:42,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:18:42,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:18:42,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068043188] [2022-07-13 13:18:42,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:18:42,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:18:42,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:18:42,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:18:42,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:18:42,018 INFO L87 Difference]: Start difference. First operand 33301 states and 36634 transitions. Second operand has 3 states, 3 states have (on average 149.33333333333334) internal successors, (448), 3 states have internal predecessors, (448), 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) [2022-07-13 13:18:43,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:18:43,741 INFO L93 Difference]: Finished difference Result 75546 states and 83066 transitions. [2022-07-13 13:18:43,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:18:43,742 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 149.33333333333334) internal successors, (448), 3 states have internal predecessors, (448), 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 567 [2022-07-13 13:18:43,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:18:43,785 INFO L225 Difference]: With dead ends: 75546 [2022-07-13 13:18:43,786 INFO L226 Difference]: Without dead ends: 42247 [2022-07-13 13:18:43,808 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 [2022-07-13 13:18:43,808 INFO L413 NwaCegarLoop]: 732 mSDtfsCounter, 246 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 1263 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 783 SdHoareTripleChecker+Invalid, 1371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 1263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-13 13:18:43,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 783 Invalid, 1371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 1263 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-13 13:18:43,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42247 states. [2022-07-13 13:18:44,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42247 to 40536. [2022-07-13 13:18:44,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40536 states, 40535 states have (on average 1.0932527445417541) internal successors, (44315), 40535 states have internal predecessors, (44315), 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) [2022-07-13 13:18:44,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40536 states to 40536 states and 44315 transitions. [2022-07-13 13:18:44,181 INFO L78 Accepts]: Start accepts. Automaton has 40536 states and 44315 transitions. Word has length 567 [2022-07-13 13:18:44,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:18:44,182 INFO L495 AbstractCegarLoop]: Abstraction has 40536 states and 44315 transitions. [2022-07-13 13:18:44,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 149.33333333333334) internal successors, (448), 3 states have internal predecessors, (448), 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) [2022-07-13 13:18:44,182 INFO L276 IsEmpty]: Start isEmpty. Operand 40536 states and 44315 transitions. [2022-07-13 13:18:44,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 599 [2022-07-13 13:18:44,199 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:18:44,199 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:18:44,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-13 13:18:44,200 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:18:44,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:18:44,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1259748942, now seen corresponding path program 1 times [2022-07-13 13:18:44,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:18:44,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212483887] [2022-07-13 13:18:44,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:18:44,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:18:44,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:18:44,365 INFO L134 CoverageAnalysis]: Checked inductivity of 802 backedges. 672 proven. 0 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2022-07-13 13:18:44,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:18:44,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212483887] [2022-07-13 13:18:44,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212483887] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:18:44,366 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:18:44,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:18:44,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790341075] [2022-07-13 13:18:44,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:18:44,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:18:44,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:18:44,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:18:44,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:18:44,368 INFO L87 Difference]: Start difference. First operand 40536 states and 44315 transitions. Second operand has 3 states, 3 states have (on average 156.66666666666666) internal successors, (470), 3 states have internal predecessors, (470), 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) [2022-07-13 13:18:45,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:18:45,947 INFO L93 Difference]: Finished difference Result 92571 states and 101579 transitions. [2022-07-13 13:18:45,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:18:45,948 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 156.66666666666666) internal successors, (470), 3 states have internal predecessors, (470), 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 598 [2022-07-13 13:18:45,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:18:46,003 INFO L225 Difference]: With dead ends: 92571 [2022-07-13 13:18:46,004 INFO L226 Difference]: Without dead ends: 51186 [2022-07-13 13:18:46,015 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 [2022-07-13 13:18:46,015 INFO L413 NwaCegarLoop]: 580 mSDtfsCounter, 312 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1182 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 1385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 1182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-13 13:18:46,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [312 Valid, 617 Invalid, 1385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 1182 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-13 13:18:46,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51186 states. [2022-07-13 13:18:46,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51186 to 51175. [2022-07-13 13:18:46,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51175 states, 51174 states have (on average 1.0936999257435416) internal successors, (55969), 51174 states have internal predecessors, (55969), 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) [2022-07-13 13:18:46,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51175 states to 51175 states and 55969 transitions. [2022-07-13 13:18:46,506 INFO L78 Accepts]: Start accepts. Automaton has 51175 states and 55969 transitions. Word has length 598 [2022-07-13 13:18:46,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:18:46,507 INFO L495 AbstractCegarLoop]: Abstraction has 51175 states and 55969 transitions. [2022-07-13 13:18:46,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 156.66666666666666) internal successors, (470), 3 states have internal predecessors, (470), 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) [2022-07-13 13:18:46,507 INFO L276 IsEmpty]: Start isEmpty. Operand 51175 states and 55969 transitions. [2022-07-13 13:18:46,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 666 [2022-07-13 13:18:46,527 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:18:46,527 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:18:46,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-13 13:18:46,527 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:18:46,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:18:46,528 INFO L85 PathProgramCache]: Analyzing trace with hash 378655293, now seen corresponding path program 1 times [2022-07-13 13:18:46,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:18:46,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837531960] [2022-07-13 13:18:46,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:18:46,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:18:46,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:18:46,683 INFO L134 CoverageAnalysis]: Checked inductivity of 811 backedges. 518 proven. 0 refuted. 0 times theorem prover too weak. 293 trivial. 0 not checked. [2022-07-13 13:18:46,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:18:46,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837531960] [2022-07-13 13:18:46,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837531960] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:18:46,684 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:18:46,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:18:46,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652571102] [2022-07-13 13:18:46,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:18:46,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:18:46,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:18:46,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:18:46,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:18:46,685 INFO L87 Difference]: Start difference. First operand 51175 states and 55969 transitions. Second operand has 3 states, 3 states have (on average 152.0) internal successors, (456), 3 states have internal predecessors, (456), 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) [2022-07-13 13:18:48,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:18:48,199 INFO L93 Difference]: Finished difference Result 106181 states and 116205 transitions. [2022-07-13 13:18:48,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:18:48,200 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 152.0) internal successors, (456), 3 states have internal predecessors, (456), 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 665 [2022-07-13 13:18:48,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:18:48,257 INFO L225 Difference]: With dead ends: 106181 [2022-07-13 13:18:48,257 INFO L226 Difference]: Without dead ends: 55008 [2022-07-13 13:18:48,291 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 [2022-07-13 13:18:48,291 INFO L413 NwaCegarLoop]: 646 mSDtfsCounter, 486 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1138 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 688 SdHoareTripleChecker+Invalid, 1305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 1138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-13 13:18:48,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [486 Valid, 688 Invalid, 1305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 1138 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-13 13:18:48,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55008 states. [2022-07-13 13:18:48,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55008 to 54999. [2022-07-13 13:18:48,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54999 states, 54998 states have (on average 1.0856394777991927) internal successors, (59708), 54998 states have internal predecessors, (59708), 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) [2022-07-13 13:18:48,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54999 states to 54999 states and 59708 transitions. [2022-07-13 13:18:48,954 INFO L78 Accepts]: Start accepts. Automaton has 54999 states and 59708 transitions. Word has length 665 [2022-07-13 13:18:48,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:18:48,954 INFO L495 AbstractCegarLoop]: Abstraction has 54999 states and 59708 transitions. [2022-07-13 13:18:48,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 152.0) internal successors, (456), 3 states have internal predecessors, (456), 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) [2022-07-13 13:18:48,954 INFO L276 IsEmpty]: Start isEmpty. Operand 54999 states and 59708 transitions. [2022-07-13 13:18:48,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 678 [2022-07-13 13:18:48,972 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:18:48,973 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:18:48,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-13 13:18:48,973 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:18:48,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:18:48,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1764057692, now seen corresponding path program 1 times [2022-07-13 13:18:48,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:18:48,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607874261] [2022-07-13 13:18:48,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:18:48,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:18:49,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:18:49,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1165 backedges. 914 proven. 0 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2022-07-13 13:18:49,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:18:49,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607874261] [2022-07-13 13:18:49,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607874261] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:18:49,159 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:18:49,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 13:18:49,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456022858] [2022-07-13 13:18:49,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:18:49,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 13:18:49,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:18:49,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 13:18:49,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 13:18:49,161 INFO L87 Difference]: Start difference. First operand 54999 states and 59708 transitions. Second operand has 4 states, 4 states have (on average 119.0) internal successors, (476), 4 states have internal predecessors, (476), 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) [2022-07-13 13:18:51,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:18:51,774 INFO L93 Difference]: Finished difference Result 127464 states and 138322 transitions. [2022-07-13 13:18:51,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 13:18:51,775 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 119.0) internal successors, (476), 4 states have internal predecessors, (476), 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 677 [2022-07-13 13:18:51,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:18:51,970 INFO L225 Difference]: With dead ends: 127464 [2022-07-13 13:18:51,970 INFO L226 Difference]: Without dead ends: 72467 [2022-07-13 13:18:51,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 13:18:51,987 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 827 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 2253 mSolverCounterSat, 403 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 827 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 2656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 403 IncrementalHoareTripleChecker+Valid, 2253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-13 13:18:51,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [827 Valid, 171 Invalid, 2656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [403 Valid, 2253 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-13 13:18:52,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72467 states. [2022-07-13 13:18:52,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72467 to 70328. [2022-07-13 13:18:52,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70328 states, 70327 states have (on average 1.0841213189813301) internal successors, (76243), 70327 states have internal predecessors, (76243), 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) [2022-07-13 13:18:52,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70328 states to 70328 states and 76243 transitions. [2022-07-13 13:18:52,666 INFO L78 Accepts]: Start accepts. Automaton has 70328 states and 76243 transitions. Word has length 677 [2022-07-13 13:18:52,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:18:52,667 INFO L495 AbstractCegarLoop]: Abstraction has 70328 states and 76243 transitions. [2022-07-13 13:18:52,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 119.0) internal successors, (476), 4 states have internal predecessors, (476), 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) [2022-07-13 13:18:52,667 INFO L276 IsEmpty]: Start isEmpty. Operand 70328 states and 76243 transitions. [2022-07-13 13:18:52,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 697 [2022-07-13 13:18:52,698 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:18:52,698 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:18:52,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-13 13:18:52,698 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:18:52,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:18:52,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1637063526, now seen corresponding path program 1 times [2022-07-13 13:18:52,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:18:52,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074868553] [2022-07-13 13:18:52,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:18:52,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:18:52,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:18:52,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1226 backedges. 893 proven. 0 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2022-07-13 13:18:52,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:18:52,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074868553] [2022-07-13 13:18:52,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074868553] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:18:52,903 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:18:52,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:18:52,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181147443] [2022-07-13 13:18:52,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:18:52,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:18:52,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:18:52,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:18:52,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:18:52,905 INFO L87 Difference]: Start difference. First operand 70328 states and 76243 transitions. Second operand has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 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) [2022-07-13 13:18:54,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:18:54,751 INFO L93 Difference]: Finished difference Result 152577 states and 165681 transitions. [2022-07-13 13:18:54,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:18:54,751 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 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 696 [2022-07-13 13:18:54,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:18:54,832 INFO L225 Difference]: With dead ends: 152577 [2022-07-13 13:18:54,832 INFO L226 Difference]: Without dead ends: 82251 [2022-07-13 13:18:54,872 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 [2022-07-13 13:18:54,873 INFO L413 NwaCegarLoop]: 261 mSDtfsCounter, 383 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1170 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 1357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 1170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-13 13:18:54,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [383 Valid, 298 Invalid, 1357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 1170 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-13 13:18:54,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82251 states. [2022-07-13 13:18:55,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82251 to 80540. [2022-07-13 13:18:55,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80540 states, 80539 states have (on average 1.079626019692323) internal successors, (86952), 80539 states have internal predecessors, (86952), 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) [2022-07-13 13:18:55,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80540 states to 80540 states and 86952 transitions. [2022-07-13 13:18:55,842 INFO L78 Accepts]: Start accepts. Automaton has 80540 states and 86952 transitions. Word has length 696 [2022-07-13 13:18:55,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:18:55,842 INFO L495 AbstractCegarLoop]: Abstraction has 80540 states and 86952 transitions. [2022-07-13 13:18:55,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 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) [2022-07-13 13:18:55,842 INFO L276 IsEmpty]: Start isEmpty. Operand 80540 states and 86952 transitions. [2022-07-13 13:18:55,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 750 [2022-07-13 13:18:55,874 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:18:55,875 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:18:55,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-13 13:18:55,883 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:18:55,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:18:55,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1592193129, now seen corresponding path program 1 times [2022-07-13 13:18:55,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:18:55,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848137213] [2022-07-13 13:18:55,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:18:55,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:18:55,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:18:56,089 INFO L134 CoverageAnalysis]: Checked inductivity of 878 backedges. 653 proven. 0 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2022-07-13 13:18:56,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:18:56,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848137213] [2022-07-13 13:18:56,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848137213] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:18:56,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:18:56,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:18:56,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533043893] [2022-07-13 13:18:56,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:18:56,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:18:56,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:18:56,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:18:56,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:18:56,094 INFO L87 Difference]: Start difference. First operand 80540 states and 86952 transitions. Second operand has 3 states, 3 states have (on average 175.33333333333334) internal successors, (526), 3 states have internal predecessors, (526), 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) [2022-07-13 13:18:57,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:18:57,633 INFO L93 Difference]: Finished difference Result 159794 states and 172448 transitions. [2022-07-13 13:18:57,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:18:57,634 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 175.33333333333334) internal successors, (526), 3 states have internal predecessors, (526), 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 749 [2022-07-13 13:18:57,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:18:57,717 INFO L225 Difference]: With dead ends: 159794 [2022-07-13 13:18:57,718 INFO L226 Difference]: Without dead ends: 79254 [2022-07-13 13:18:57,769 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 [2022-07-13 13:18:57,769 INFO L413 NwaCegarLoop]: 630 mSDtfsCounter, 335 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 1136 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 683 SdHoareTripleChecker+Invalid, 1253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-13 13:18:57,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [335 Valid, 683 Invalid, 1253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1136 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-13 13:18:57,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79254 states. [2022-07-13 13:18:58,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79254 to 77977. [2022-07-13 13:18:58,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77977 states, 77976 states have (on average 1.0655586334256695) internal successors, (83088), 77976 states have internal predecessors, (83088), 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) [2022-07-13 13:18:58,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77977 states to 77977 states and 83088 transitions. [2022-07-13 13:18:58,744 INFO L78 Accepts]: Start accepts. Automaton has 77977 states and 83088 transitions. Word has length 749 [2022-07-13 13:18:58,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:18:58,745 INFO L495 AbstractCegarLoop]: Abstraction has 77977 states and 83088 transitions. [2022-07-13 13:18:58,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 175.33333333333334) internal successors, (526), 3 states have internal predecessors, (526), 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) [2022-07-13 13:18:58,745 INFO L276 IsEmpty]: Start isEmpty. Operand 77977 states and 83088 transitions. [2022-07-13 13:18:58,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 759 [2022-07-13 13:18:58,779 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:18:58,779 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:18:58,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-13 13:18:58,779 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:18:58,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:18:58,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1256177813, now seen corresponding path program 1 times [2022-07-13 13:18:58,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:18:58,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552170969] [2022-07-13 13:18:58,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:18:58,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:18:58,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:18:58,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 757 proven. 82 refuted. 0 times theorem prover too weak. 457 trivial. 0 not checked. [2022-07-13 13:18:58,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:18:58,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552170969] [2022-07-13 13:18:58,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552170969] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 13:18:58,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568325944] [2022-07-13 13:18:58,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:18:58,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 13:18:58,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 13:18:58,960 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 13:18:58,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 13:18:59,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:18:59,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 949 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 13:18:59,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 13:18:59,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 757 proven. 82 refuted. 0 times theorem prover too weak. 457 trivial. 0 not checked. [2022-07-13 13:18:59,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 13:19:00,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 839 proven. 0 refuted. 0 times theorem prover too weak. 457 trivial. 0 not checked. [2022-07-13 13:19:00,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568325944] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-13 13:19:00,124 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-13 13:19:00,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2022-07-13 13:19:00,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049791350] [2022-07-13 13:19:00,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:19:00,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 13:19:00,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:19:00,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 13:19:00,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-13 13:19:00,127 INFO L87 Difference]: Start difference. First operand 77977 states and 83088 transitions. Second operand has 4 states, 4 states have (on average 119.75) internal successors, (479), 3 states have internal predecessors, (479), 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) [2022-07-13 13:19:02,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:19:02,814 INFO L93 Difference]: Finished difference Result 173852 states and 185471 transitions. [2022-07-13 13:19:02,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 13:19:02,815 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 119.75) internal successors, (479), 3 states have internal predecessors, (479), 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 758 [2022-07-13 13:19:02,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:19:02,920 INFO L225 Difference]: With dead ends: 173852 [2022-07-13 13:19:02,921 INFO L226 Difference]: Without dead ends: 95452 [2022-07-13 13:19:02,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1517 GetRequests, 1511 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-13 13:19:02,969 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 821 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 2052 mSolverCounterSat, 699 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 821 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 2751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 699 IncrementalHoareTripleChecker+Valid, 2052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-13 13:19:02,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [821 Valid, 114 Invalid, 2751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [699 Valid, 2052 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-07-13 13:19:03,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95452 states. [2022-07-13 13:19:03,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95452 to 82685. [2022-07-13 13:19:03,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82685 states, 82684 states have (on average 1.0657200909486721) internal successors, (88118), 82684 states have internal predecessors, (88118), 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) [2022-07-13 13:19:03,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82685 states to 82685 states and 88118 transitions. [2022-07-13 13:19:03,979 INFO L78 Accepts]: Start accepts. Automaton has 82685 states and 88118 transitions. Word has length 758 [2022-07-13 13:19:03,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:19:03,979 INFO L495 AbstractCegarLoop]: Abstraction has 82685 states and 88118 transitions. [2022-07-13 13:19:03,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 119.75) internal successors, (479), 3 states have internal predecessors, (479), 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) [2022-07-13 13:19:03,980 INFO L276 IsEmpty]: Start isEmpty. Operand 82685 states and 88118 transitions. [2022-07-13 13:19:04,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 785 [2022-07-13 13:19:04,011 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:19:04,011 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:19:04,028 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-13 13:19:04,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 13:19:04,212 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:19:04,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:19:04,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1804847060, now seen corresponding path program 1 times [2022-07-13 13:19:04,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:19:04,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416822693] [2022-07-13 13:19:04,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:19:04,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:19:04,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:19:04,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1441 backedges. 1088 proven. 0 refuted. 0 times theorem prover too weak. 353 trivial. 0 not checked. [2022-07-13 13:19:04,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:19:04,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416822693] [2022-07-13 13:19:04,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416822693] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:19:04,402 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:19:04,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:19:04,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119080616] [2022-07-13 13:19:04,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:19:04,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:19:04,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:19:04,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:19:04,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:19:04,404 INFO L87 Difference]: Start difference. First operand 82685 states and 88118 transitions. Second operand has 3 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 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) [2022-07-13 13:19:06,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:19:06,220 INFO L93 Difference]: Finished difference Result 176472 states and 188139 transitions. [2022-07-13 13:19:06,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:19:06,220 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 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 784 [2022-07-13 13:19:06,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:19:06,321 INFO L225 Difference]: With dead ends: 176472 [2022-07-13 13:19:06,321 INFO L226 Difference]: Without dead ends: 93789 [2022-07-13 13:19:06,368 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 [2022-07-13 13:19:06,369 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 264 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 1247 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 1371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 1247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-13 13:19:06,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 243 Invalid, 1371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 1247 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-13 13:19:06,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93789 states. [2022-07-13 13:19:07,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93789 to 86097. [2022-07-13 13:19:07,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86097 states, 86096 states have (on average 1.0659031778479837) internal successors, (91770), 86096 states have internal predecessors, (91770), 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) [2022-07-13 13:19:07,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86097 states to 86097 states and 91770 transitions. [2022-07-13 13:19:07,426 INFO L78 Accepts]: Start accepts. Automaton has 86097 states and 91770 transitions. Word has length 784 [2022-07-13 13:19:07,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:19:07,427 INFO L495 AbstractCegarLoop]: Abstraction has 86097 states and 91770 transitions. [2022-07-13 13:19:07,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 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) [2022-07-13 13:19:07,427 INFO L276 IsEmpty]: Start isEmpty. Operand 86097 states and 91770 transitions. [2022-07-13 13:19:07,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 803 [2022-07-13 13:19:07,464 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:19:07,464 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-13 13:19:07,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-13 13:19:07,465 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:19:07,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:19:07,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1725455319, now seen corresponding path program 1 times [2022-07-13 13:19:07,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:19:07,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217102959] [2022-07-13 13:19:07,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:19:07,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:19:07,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:19:07,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1705 backedges. 1209 proven. 0 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2022-07-13 13:19:07,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:19:07,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217102959] [2022-07-13 13:19:07,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217102959] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:19:07,822 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:19:07,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:19:07,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177475441] [2022-07-13 13:19:07,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:19:07,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:19:07,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:19:07,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:19:07,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:19:07,824 INFO L87 Difference]: Start difference. First operand 86097 states and 91770 transitions. Second operand has 3 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 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) [2022-07-13 13:19:09,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:19:09,690 INFO L93 Difference]: Finished difference Result 179874 states and 191613 transitions. [2022-07-13 13:19:09,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:19:09,690 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 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 802 [2022-07-13 13:19:09,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:19:09,771 INFO L225 Difference]: With dead ends: 179874 [2022-07-13 13:19:09,771 INFO L226 Difference]: Without dead ends: 93779 [2022-07-13 13:19:09,791 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 [2022-07-13 13:19:09,791 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 426 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1183 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 1369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 1183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-13 13:19:09,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [426 Valid, 232 Invalid, 1369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 1183 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-13 13:19:09,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93779 states. [2022-07-13 13:19:10,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93779 to 88230. [2022-07-13 13:19:10,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88230 states, 88229 states have (on average 1.0642419159233358) internal successors, (93897), 88229 states have internal predecessors, (93897), 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) [2022-07-13 13:19:10,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88230 states to 88230 states and 93897 transitions. [2022-07-13 13:19:10,818 INFO L78 Accepts]: Start accepts. Automaton has 88230 states and 93897 transitions. Word has length 802 [2022-07-13 13:19:10,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:19:10,819 INFO L495 AbstractCegarLoop]: Abstraction has 88230 states and 93897 transitions. [2022-07-13 13:19:10,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 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) [2022-07-13 13:19:10,819 INFO L276 IsEmpty]: Start isEmpty. Operand 88230 states and 93897 transitions. [2022-07-13 13:19:10,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 811 [2022-07-13 13:19:10,857 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:19:10,858 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-13 13:19:10,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-13 13:19:10,858 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:19:10,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:19:10,859 INFO L85 PathProgramCache]: Analyzing trace with hash 2052133367, now seen corresponding path program 1 times [2022-07-13 13:19:10,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:19:10,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740964248] [2022-07-13 13:19:10,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:19:10,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:19:10,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:19:11,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1662 backedges. 1152 proven. 0 refuted. 0 times theorem prover too weak. 510 trivial. 0 not checked. [2022-07-13 13:19:11,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:19:11,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740964248] [2022-07-13 13:19:11,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740964248] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:19:11,106 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:19:11,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:19:11,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500870870] [2022-07-13 13:19:11,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:19:11,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:19:11,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:19:11,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:19:11,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:19:11,108 INFO L87 Difference]: Start difference. First operand 88230 states and 93897 transitions. Second operand has 3 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 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) [2022-07-13 13:19:12,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:19:12,922 INFO L93 Difference]: Finished difference Result 181575 states and 193112 transitions. [2022-07-13 13:19:12,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:19:12,922 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 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 810 [2022-07-13 13:19:12,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:19:13,016 INFO L225 Difference]: With dead ends: 181575 [2022-07-13 13:19:13,016 INFO L226 Difference]: Without dead ends: 93347 [2022-07-13 13:19:13,054 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 [2022-07-13 13:19:13,057 INFO L413 NwaCegarLoop]: 228 mSDtfsCounter, 317 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 1144 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 1275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 1144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-13 13:19:13,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 276 Invalid, 1275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 1144 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-13 13:19:13,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93347 states. [2022-07-13 13:19:13,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93347 to 87380. [2022-07-13 13:19:13,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87380 states, 87379 states have (on average 1.0636308495176185) internal successors, (92939), 87379 states have internal predecessors, (92939), 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) [2022-07-13 13:19:14,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87380 states to 87380 states and 92939 transitions. [2022-07-13 13:19:14,159 INFO L78 Accepts]: Start accepts. Automaton has 87380 states and 92939 transitions. Word has length 810 [2022-07-13 13:19:14,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:19:14,159 INFO L495 AbstractCegarLoop]: Abstraction has 87380 states and 92939 transitions. [2022-07-13 13:19:14,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 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) [2022-07-13 13:19:14,159 INFO L276 IsEmpty]: Start isEmpty. Operand 87380 states and 92939 transitions. [2022-07-13 13:19:14,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 828 [2022-07-13 13:19:14,191 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:19:14,192 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:19:14,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-13 13:19:14,192 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:19:14,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:19:14,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1747475996, now seen corresponding path program 1 times [2022-07-13 13:19:14,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:19:14,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886663037] [2022-07-13 13:19:14,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:19:14,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:19:14,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:19:14,413 INFO L134 CoverageAnalysis]: Checked inductivity of 1229 backedges. 695 proven. 0 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2022-07-13 13:19:14,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:19:14,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886663037] [2022-07-13 13:19:14,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886663037] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:19:14,413 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:19:14,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 13:19:14,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116862282] [2022-07-13 13:19:14,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:19:14,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 13:19:14,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:19:14,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 13:19:14,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 13:19:14,415 INFO L87 Difference]: Start difference. First operand 87380 states and 92939 transitions. Second operand has 4 states, 4 states have (on average 132.25) internal successors, (529), 4 states have internal predecessors, (529), 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) [2022-07-13 13:19:17,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:19:17,184 INFO L93 Difference]: Finished difference Result 191415 states and 203345 transitions. [2022-07-13 13:19:17,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 13:19:17,185 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 132.25) internal successors, (529), 4 states have internal predecessors, (529), 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 827 [2022-07-13 13:19:17,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:19:17,302 INFO L225 Difference]: With dead ends: 191415 [2022-07-13 13:19:17,302 INFO L226 Difference]: Without dead ends: 104037 [2022-07-13 13:19:17,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 13:19:17,353 INFO L413 NwaCegarLoop]: 601 mSDtfsCounter, 820 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 2804 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 820 SdHoareTripleChecker+Valid, 694 SdHoareTripleChecker+Invalid, 3044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 2804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-13 13:19:17,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [820 Valid, 694 Invalid, 3044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 2804 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-13 13:19:17,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104037 states. [2022-07-13 13:19:18,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104037 to 86529. [2022-07-13 13:19:18,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86529 states, 86528 states have (on average 1.0631356323964498) internal successors, (91991), 86528 states have internal predecessors, (91991), 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) [2022-07-13 13:19:18,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86529 states to 86529 states and 91991 transitions. [2022-07-13 13:19:18,560 INFO L78 Accepts]: Start accepts. Automaton has 86529 states and 91991 transitions. Word has length 827 [2022-07-13 13:19:18,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:19:18,560 INFO L495 AbstractCegarLoop]: Abstraction has 86529 states and 91991 transitions. [2022-07-13 13:19:18,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 132.25) internal successors, (529), 4 states have internal predecessors, (529), 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) [2022-07-13 13:19:18,561 INFO L276 IsEmpty]: Start isEmpty. Operand 86529 states and 91991 transitions. [2022-07-13 13:19:18,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 852 [2022-07-13 13:19:18,596 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:19:18,596 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:19:18,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-13 13:19:18,596 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:19:18,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:19:18,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1488477057, now seen corresponding path program 1 times [2022-07-13 13:19:18,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:19:18,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635492989] [2022-07-13 13:19:18,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:19:18,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:19:18,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:19:18,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1774 backedges. 719 proven. 73 refuted. 0 times theorem prover too weak. 982 trivial. 0 not checked. [2022-07-13 13:19:18,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:19:18,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635492989] [2022-07-13 13:19:18,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635492989] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 13:19:18,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490695704] [2022-07-13 13:19:18,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:19:18,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 13:19:18,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 13:19:18,779 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 13:19:18,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 13:19:18,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:19:18,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 1065 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 13:19:18,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 13:19:19,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1774 backedges. 719 proven. 73 refuted. 0 times theorem prover too weak. 982 trivial. 0 not checked. [2022-07-13 13:19:19,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 13:19:19,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1774 backedges. 792 proven. 0 refuted. 0 times theorem prover too weak. 982 trivial. 0 not checked. [2022-07-13 13:19:19,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490695704] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-13 13:19:19,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-13 13:19:19,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2022-07-13 13:19:19,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449143763] [2022-07-13 13:19:19,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:19:19,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 13:19:19,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:19:19,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 13:19:19,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-13 13:19:19,632 INFO L87 Difference]: Start difference. First operand 86529 states and 91991 transitions. Second operand has 4 states, 4 states have (on average 92.0) internal successors, (368), 3 states have internal predecessors, (368), 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) [2022-07-13 13:19:22,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:19:22,351 INFO L93 Difference]: Finished difference Result 189681 states and 201904 transitions. [2022-07-13 13:19:22,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 13:19:22,352 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 92.0) internal successors, (368), 3 states have internal predecessors, (368), 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 851 [2022-07-13 13:19:22,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:19:22,650 INFO L225 Difference]: With dead ends: 189681 [2022-07-13 13:19:22,650 INFO L226 Difference]: Without dead ends: 103154 [2022-07-13 13:19:22,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1703 GetRequests, 1697 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-13 13:19:22,681 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 807 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 2240 mSolverCounterSat, 382 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 807 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 2622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 382 IncrementalHoareTripleChecker+Valid, 2240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-13 13:19:22,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [807 Valid, 209 Invalid, 2622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [382 Valid, 2240 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-13 13:19:22,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103154 states. [2022-07-13 13:19:23,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103154 to 98475. [2022-07-13 13:19:23,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98475 states, 98474 states have (on average 1.0649003797956822) internal successors, (104865), 98474 states have internal predecessors, (104865), 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) [2022-07-13 13:19:23,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98475 states to 98475 states and 104865 transitions. [2022-07-13 13:19:23,906 INFO L78 Accepts]: Start accepts. Automaton has 98475 states and 104865 transitions. Word has length 851 [2022-07-13 13:19:23,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:19:23,910 INFO L495 AbstractCegarLoop]: Abstraction has 98475 states and 104865 transitions. [2022-07-13 13:19:23,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 92.0) internal successors, (368), 3 states have internal predecessors, (368), 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) [2022-07-13 13:19:23,910 INFO L276 IsEmpty]: Start isEmpty. Operand 98475 states and 104865 transitions. [2022-07-13 13:19:23,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 858 [2022-07-13 13:19:23,950 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:19:23,952 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:19:23,971 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-13 13:19:24,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-07-13 13:19:24,164 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:19:24,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:19:24,164 INFO L85 PathProgramCache]: Analyzing trace with hash -321783302, now seen corresponding path program 1 times [2022-07-13 13:19:24,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:19:24,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470603396] [2022-07-13 13:19:24,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:19:24,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:19:24,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:19:24,639 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 191 proven. 0 refuted. 0 times theorem prover too weak. 649 trivial. 0 not checked. [2022-07-13 13:19:24,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:19:24,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470603396] [2022-07-13 13:19:24,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470603396] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:19:24,639 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:19:24,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:19:24,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240531331] [2022-07-13 13:19:24,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:19:24,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:19:24,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:19:24,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:19:24,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:19:24,641 INFO L87 Difference]: Start difference. First operand 98475 states and 104865 transitions. Second operand has 3 states, 3 states have (on average 152.0) internal successors, (456), 3 states have internal predecessors, (456), 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) [2022-07-13 13:19:26,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:19:26,153 INFO L93 Difference]: Finished difference Result 101463 states and 107959 transitions. [2022-07-13 13:19:26,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:19:26,153 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 152.0) internal successors, (456), 3 states have internal predecessors, (456), 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 857 [2022-07-13 13:19:26,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:19:26,251 INFO L225 Difference]: With dead ends: 101463 [2022-07-13 13:19:26,251 INFO L226 Difference]: Without dead ends: 101036 [2022-07-13 13:19:26,281 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 [2022-07-13 13:19:26,281 INFO L413 NwaCegarLoop]: 685 mSDtfsCounter, 412 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 1211 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 740 SdHoareTripleChecker+Invalid, 1275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-13 13:19:26,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [412 Valid, 740 Invalid, 1275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1211 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-13 13:19:26,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101036 states. [2022-07-13 13:19:27,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101036 to 98475. [2022-07-13 13:19:27,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98475 states, 98474 states have (on average 1.0648089851128217) internal successors, (104856), 98474 states have internal predecessors, (104856), 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) [2022-07-13 13:19:27,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98475 states to 98475 states and 104856 transitions. [2022-07-13 13:19:27,582 INFO L78 Accepts]: Start accepts. Automaton has 98475 states and 104856 transitions. Word has length 857 [2022-07-13 13:19:27,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:19:27,583 INFO L495 AbstractCegarLoop]: Abstraction has 98475 states and 104856 transitions. [2022-07-13 13:19:27,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 152.0) internal successors, (456), 3 states have internal predecessors, (456), 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) [2022-07-13 13:19:27,583 INFO L276 IsEmpty]: Start isEmpty. Operand 98475 states and 104856 transitions. [2022-07-13 13:19:27,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 861 [2022-07-13 13:19:27,623 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:19:27,623 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:19:27,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-07-13 13:19:27,623 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:19:27,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:19:27,624 INFO L85 PathProgramCache]: Analyzing trace with hash -733194390, now seen corresponding path program 1 times [2022-07-13 13:19:27,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:19:27,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334587414] [2022-07-13 13:19:27,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:19:27,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:19:27,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:19:27,896 INFO L134 CoverageAnalysis]: Checked inductivity of 843 backedges. 598 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2022-07-13 13:19:27,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:19:27,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334587414] [2022-07-13 13:19:27,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334587414] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:19:27,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:19:27,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 13:19:27,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238682541] [2022-07-13 13:19:27,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:19:27,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 13:19:27,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:19:27,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 13:19:27,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 13:19:27,899 INFO L87 Difference]: Start difference. First operand 98475 states and 104856 transitions. Second operand has 4 states, 4 states have (on average 174.5) internal successors, (698), 4 states have internal predecessors, (698), 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) [2022-07-13 13:19:30,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:19:30,635 INFO L93 Difference]: Finished difference Result 217390 states and 231064 transitions. [2022-07-13 13:19:30,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 13:19:30,636 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 174.5) internal successors, (698), 4 states have internal predecessors, (698), 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 860 [2022-07-13 13:19:30,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:19:30,777 INFO L225 Difference]: With dead ends: 217390 [2022-07-13 13:19:30,777 INFO L226 Difference]: Without dead ends: 117217 [2022-07-13 13:19:30,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 13:19:30,843 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 659 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 2313 mSolverCounterSat, 317 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 659 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 2630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 317 IncrementalHoareTripleChecker+Valid, 2313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-13 13:19:30,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [659 Valid, 168 Invalid, 2630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [317 Valid, 2313 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-13 13:19:30,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117217 states. [2022-07-13 13:19:32,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117217 to 105275. [2022-07-13 13:19:32,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105275 states, 105274 states have (on average 1.0639379143948173) internal successors, (112005), 105274 states have internal predecessors, (112005), 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) [2022-07-13 13:19:32,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105275 states to 105275 states and 112005 transitions. [2022-07-13 13:19:32,313 INFO L78 Accepts]: Start accepts. Automaton has 105275 states and 112005 transitions. Word has length 860 [2022-07-13 13:19:32,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:19:32,314 INFO L495 AbstractCegarLoop]: Abstraction has 105275 states and 112005 transitions. [2022-07-13 13:19:32,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 174.5) internal successors, (698), 4 states have internal predecessors, (698), 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) [2022-07-13 13:19:32,314 INFO L276 IsEmpty]: Start isEmpty. Operand 105275 states and 112005 transitions. [2022-07-13 13:19:32,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 920 [2022-07-13 13:19:32,367 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:19:32,367 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:19:32,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-07-13 13:19:32,367 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:19:32,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:19:32,368 INFO L85 PathProgramCache]: Analyzing trace with hash 260247586, now seen corresponding path program 1 times [2022-07-13 13:19:32,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:19:32,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122644581] [2022-07-13 13:19:32,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:19:32,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:19:32,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:19:32,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 1137 proven. 0 refuted. 0 times theorem prover too weak. 789 trivial. 0 not checked. [2022-07-13 13:19:32,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:19:32,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122644581] [2022-07-13 13:19:32,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122644581] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:19:32,572 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:19:32,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 13:19:32,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881598526] [2022-07-13 13:19:32,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:19:32,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:19:32,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:19:32,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:19:32,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:19:32,573 INFO L87 Difference]: Start difference. First operand 105275 states and 112005 transitions. Second operand has 3 states, 3 states have (on average 142.66666666666666) internal successors, (428), 2 states have internal predecessors, (428), 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) [2022-07-13 13:19:33,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:19:33,955 INFO L93 Difference]: Finished difference Result 203725 states and 216909 transitions. [2022-07-13 13:19:33,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:19:33,956 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 142.66666666666666) internal successors, (428), 2 states have internal predecessors, (428), 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 919 [2022-07-13 13:19:33,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:19:34,070 INFO L225 Difference]: With dead ends: 203725 [2022-07-13 13:19:34,070 INFO L226 Difference]: Without dead ends: 98875 [2022-07-13 13:19:34,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:19:34,126 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 484 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 484 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-13 13:19:34,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [484 Valid, 77 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 625 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-13 13:19:34,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98875 states. [2022-07-13 13:19:35,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98875 to 98447. [2022-07-13 13:19:35,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98447 states, 98446 states have (on average 1.065152469374073) internal successors, (104860), 98446 states have internal predecessors, (104860), 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)