./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem19_label28.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem19_label28.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 4253e0451be735529167e5ed681d73045b3b91eb0fb6b7736298c9e50c884adf --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 12:56:22,815 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 12:56:22,817 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 12:56:22,856 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 12:56:22,856 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 12:56:22,857 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 12:56:22,859 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 12:56:22,861 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 12:56:22,862 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 12:56:22,867 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 12:56:22,868 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 12:56:22,870 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 12:56:22,870 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 12:56:22,872 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 12:56:22,873 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 12:56:22,876 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 12:56:22,877 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 12:56:22,878 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 12:56:22,879 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 12:56:22,884 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 12:56:22,885 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 12:56:22,886 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 12:56:22,887 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 12:56:22,887 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 12:56:22,889 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 12:56:22,891 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 12:56:22,891 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 12:56:22,891 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 12:56:22,892 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 12:56:22,893 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 12:56:22,894 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 12:56:22,894 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 12:56:22,895 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 12:56:22,896 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 12:56:22,896 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 12:56:22,897 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 12:56:22,897 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 12:56:22,897 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 12:56:22,897 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 12:56:22,898 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 12:56:22,898 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 12:56:22,900 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 12:56:22,900 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 12:56:22,924 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 12:56:22,925 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 12:56:22,925 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 12:56:22,925 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 12:56:22,926 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 12:56:22,926 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 12:56:22,926 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 12:56:22,926 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 12:56:22,927 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 12:56:22,927 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 12:56:22,927 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 12:56:22,928 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 12:56:22,928 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 12:56:22,928 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 12:56:22,928 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 12:56:22,928 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 12:56:22,928 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 12:56:22,929 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 12:56:22,929 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 12:56:22,929 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 12:56:22,929 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 12:56:22,929 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 12:56:22,929 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 12:56:22,929 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 12:56:22,930 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 12:56:22,930 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 12:56:22,930 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 12:56:22,930 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 12:56:22,930 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 12:56:22,931 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 12:56:22,931 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 12:56:22,931 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 12:56:22,931 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 12:56:22,931 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4253e0451be735529167e5ed681d73045b3b91eb0fb6b7736298c9e50c884adf [2022-07-19 12:56:23,109 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 12:56:23,133 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 12:56:23,134 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 12:56:23,135 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 12:56:23,136 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 12:56:23,136 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem19_label28.c [2022-07-19 12:56:23,182 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/634f7f1a1/2deb999dae94452398199b125782b8e6/FLAG0a16e57a1 [2022-07-19 12:56:23,794 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 12:56:23,795 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label28.c [2022-07-19 12:56:23,834 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/634f7f1a1/2deb999dae94452398199b125782b8e6/FLAG0a16e57a1 [2022-07-19 12:56:23,981 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/634f7f1a1/2deb999dae94452398199b125782b8e6 [2022-07-19 12:56:23,983 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 12:56:23,984 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 12:56:23,984 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 12:56:23,985 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 12:56:23,987 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 12:56:23,987 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 12:56:23" (1/1) ... [2022-07-19 12:56:23,988 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17ed2318 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:56:23, skipping insertion in model container [2022-07-19 12:56:23,988 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 12:56:23" (1/1) ... [2022-07-19 12:56:23,993 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 12:56:24,093 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 12:56:24,332 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/Problem19_label28.c[3379,3392] [2022-07-19 12:56:25,197 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 12:56:25,204 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 12:56:25,226 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/Problem19_label28.c[3379,3392] [2022-07-19 12:56:25,852 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 12:56:25,890 INFO L208 MainTranslator]: Completed translation [2022-07-19 12:56:25,890 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:56:25 WrapperNode [2022-07-19 12:56:25,890 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 12:56:25,891 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 12:56:25,891 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 12:56:25,891 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 12:56:25,913 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:56:25" (1/1) ... [2022-07-19 12:56:26,045 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:56:25" (1/1) ... [2022-07-19 12:56:26,828 INFO L137 Inliner]: procedures = 19, calls = 13, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 9425 [2022-07-19 12:56:26,828 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 12:56:26,829 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 12:56:26,830 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 12:56:26,830 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 12:56:26,835 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:56:25" (1/1) ... [2022-07-19 12:56:26,835 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:56:25" (1/1) ... [2022-07-19 12:56:26,990 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:56:25" (1/1) ... [2022-07-19 12:56:26,990 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:56:25" (1/1) ... [2022-07-19 12:56:27,417 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:56:25" (1/1) ... [2022-07-19 12:56:27,492 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:56:25" (1/1) ... [2022-07-19 12:56:27,657 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:56:25" (1/1) ... [2022-07-19 12:56:27,878 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 12:56:27,879 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 12:56:27,879 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 12:56:27,880 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 12:56:27,880 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:56:25" (1/1) ... [2022-07-19 12:56:27,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 12:56:27,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 12:56:27,921 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-19 12:56:27,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-19 12:56:27,958 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 12:56:27,958 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 12:56:27,958 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 12:56:27,958 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 12:56:28,007 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 12:56:28,008 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 12:56:33,437 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 12:56:33,451 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 12:56:33,451 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-19 12:56:33,453 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 12:56:33 BoogieIcfgContainer [2022-07-19 12:56:33,453 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 12:56:33,455 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 12:56:33,455 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 12:56:33,457 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 12:56:33,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 12:56:23" (1/3) ... [2022-07-19 12:56:33,457 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@110ab944 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 12:56:33, skipping insertion in model container [2022-07-19 12:56:33,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:56:25" (2/3) ... [2022-07-19 12:56:33,458 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@110ab944 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 12:56:33, skipping insertion in model container [2022-07-19 12:56:33,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 12:56:33" (3/3) ... [2022-07-19 12:56:33,459 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label28.c [2022-07-19 12:56:33,467 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 12:56:33,467 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 12:56:33,513 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 12:56:33,517 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@56074a83, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@62890e9 [2022-07-19 12:56:33,518 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 12:56:33,525 INFO L276 IsEmpty]: Start isEmpty. Operand has 1748 states, 1746 states have (on average 1.8699885452462772) internal successors, (3265), 1747 states have internal predecessors, (3265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:56:33,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-19 12:56:33,530 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:56:33,530 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] [2022-07-19 12:56:33,531 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:56:33,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:56:33,534 INFO L85 PathProgramCache]: Analyzing trace with hash -573341295, now seen corresponding path program 1 times [2022-07-19 12:56:33,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:56:33,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294191634] [2022-07-19 12:56:33,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:56:33,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:56:33,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:56:33,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 12:56:33,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:56:33,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294191634] [2022-07-19 12:56:33,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294191634] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:56:33,674 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:56:33,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 12:56:33,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748374592] [2022-07-19 12:56:33,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:56:33,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:56:33,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:56:33,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:56:33,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:56:33,706 INFO L87 Difference]: Start difference. First operand has 1748 states, 1746 states have (on average 1.8699885452462772) internal successors, (3265), 1747 states have internal predecessors, (3265), 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 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:56:39,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:56:39,429 INFO L93 Difference]: Finished difference Result 4957 states and 9398 transitions. [2022-07-19 12:56:39,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:56:39,431 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 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 23 [2022-07-19 12:56:39,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:56:39,456 INFO L225 Difference]: With dead ends: 4957 [2022-07-19 12:56:39,456 INFO L226 Difference]: Without dead ends: 3129 [2022-07-19 12:56:39,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:56:39,466 INFO L413 NwaCegarLoop]: 1373 mSDtfsCounter, 1603 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 4344 mSolverCounterSat, 1517 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1603 SdHoareTripleChecker+Valid, 1595 SdHoareTripleChecker+Invalid, 5861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1517 IncrementalHoareTripleChecker+Valid, 4344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-07-19 12:56:39,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1603 Valid, 1595 Invalid, 5861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1517 Valid, 4344 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2022-07-19 12:56:39,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3129 states. [2022-07-19 12:56:39,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3129 to 3108. [2022-07-19 12:56:39,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3108 states, 3107 states have (on average 1.6012230447376892) internal successors, (4975), 3107 states have internal predecessors, (4975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:56:39,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3108 states to 3108 states and 4975 transitions. [2022-07-19 12:56:39,577 INFO L78 Accepts]: Start accepts. Automaton has 3108 states and 4975 transitions. Word has length 23 [2022-07-19 12:56:39,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:56:39,577 INFO L495 AbstractCegarLoop]: Abstraction has 3108 states and 4975 transitions. [2022-07-19 12:56:39,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:56:39,578 INFO L276 IsEmpty]: Start isEmpty. Operand 3108 states and 4975 transitions. [2022-07-19 12:56:39,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-07-19 12:56:39,582 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:56:39,583 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:56:39,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 12:56:39,583 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:56:39,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:56:39,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1128031860, now seen corresponding path program 1 times [2022-07-19 12:56:39,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:56:39,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609085897] [2022-07-19 12:56:39,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:56:39,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:56:39,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:56:39,739 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 12:56:39,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:56:39,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609085897] [2022-07-19 12:56:39,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609085897] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:56:39,740 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:56:39,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:56:39,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679231577] [2022-07-19 12:56:39,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:56:39,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 12:56:39,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:56:39,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 12:56:39,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 12:56:39,742 INFO L87 Difference]: Start difference. First operand 3108 states and 4975 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:56:48,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:56:48,044 INFO L93 Difference]: Finished difference Result 10359 states and 16187 transitions. [2022-07-19 12:56:48,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 12:56:48,045 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2022-07-19 12:56:48,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:56:48,087 INFO L225 Difference]: With dead ends: 10359 [2022-07-19 12:56:48,091 INFO L226 Difference]: Without dead ends: 7253 [2022-07-19 12:56:48,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 12:56:48,098 INFO L413 NwaCegarLoop]: 1024 mSDtfsCounter, 4321 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 9504 mSolverCounterSat, 1500 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4321 SdHoareTripleChecker+Valid, 1292 SdHoareTripleChecker+Invalid, 11004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1500 IncrementalHoareTripleChecker+Valid, 9504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2022-07-19 12:56:48,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4321 Valid, 1292 Invalid, 11004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1500 Valid, 9504 Invalid, 0 Unknown, 0 Unchecked, 8.1s Time] [2022-07-19 12:56:48,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7253 states. [2022-07-19 12:56:48,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7253 to 7249. [2022-07-19 12:56:48,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7249 states, 7248 states have (on average 1.4503311258278146) internal successors, (10512), 7248 states have internal predecessors, (10512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:56:48,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7249 states to 7249 states and 10512 transitions. [2022-07-19 12:56:48,235 INFO L78 Accepts]: Start accepts. Automaton has 7249 states and 10512 transitions. Word has length 90 [2022-07-19 12:56:48,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:56:48,236 INFO L495 AbstractCegarLoop]: Abstraction has 7249 states and 10512 transitions. [2022-07-19 12:56:48,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:56:48,237 INFO L276 IsEmpty]: Start isEmpty. Operand 7249 states and 10512 transitions. [2022-07-19 12:56:48,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2022-07-19 12:56:48,242 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:56:48,242 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:56:48,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 12:56:48,243 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:56:48,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:56:48,243 INFO L85 PathProgramCache]: Analyzing trace with hash -813571766, now seen corresponding path program 1 times [2022-07-19 12:56:48,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:56:48,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2785633] [2022-07-19 12:56:48,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:56:48,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:56:48,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:56:48,549 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-19 12:56:48,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:56:48,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2785633] [2022-07-19 12:56:48,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2785633] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:56:48,552 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:56:48,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:56:48,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369640189] [2022-07-19 12:56:48,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:56:48,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 12:56:48,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:56:48,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 12:56:48,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 12:56:48,555 INFO L87 Difference]: Start difference. First operand 7249 states and 10512 transitions. Second operand has 4 states, 4 states have (on average 69.25) internal successors, (277), 3 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:56:56,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:56:56,579 INFO L93 Difference]: Finished difference Result 17269 states and 24867 transitions. [2022-07-19 12:56:56,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 12:56:56,604 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 69.25) internal successors, (277), 3 states have internal predecessors, (277), 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 297 [2022-07-19 12:56:56,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:56:56,638 INFO L225 Difference]: With dead ends: 17269 [2022-07-19 12:56:56,638 INFO L226 Difference]: Without dead ends: 11387 [2022-07-19 12:56:56,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 12:56:56,651 INFO L413 NwaCegarLoop]: 1803 mSDtfsCounter, 3755 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 9455 mSolverCounterSat, 431 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3755 SdHoareTripleChecker+Valid, 2157 SdHoareTripleChecker+Invalid, 9886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 431 IncrementalHoareTripleChecker+Valid, 9455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2022-07-19 12:56:56,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3755 Valid, 2157 Invalid, 9886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [431 Valid, 9455 Invalid, 0 Unknown, 0 Unchecked, 7.7s Time] [2022-07-19 12:56:56,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11387 states. [2022-07-19 12:56:56,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11387 to 11367. [2022-07-19 12:56:56,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11367 states, 11366 states have (on average 1.3286116487770543) internal successors, (15101), 11366 states have internal predecessors, (15101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:56:56,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11367 states to 11367 states and 15101 transitions. [2022-07-19 12:56:56,814 INFO L78 Accepts]: Start accepts. Automaton has 11367 states and 15101 transitions. Word has length 297 [2022-07-19 12:56:56,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:56:56,815 INFO L495 AbstractCegarLoop]: Abstraction has 11367 states and 15101 transitions. [2022-07-19 12:56:56,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 69.25) internal successors, (277), 3 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:56:56,815 INFO L276 IsEmpty]: Start isEmpty. Operand 11367 states and 15101 transitions. [2022-07-19 12:56:56,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2022-07-19 12:56:56,818 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:56:56,818 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:56:56,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 12:56:56,818 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:56:56,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:56:56,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1573993180, now seen corresponding path program 1 times [2022-07-19 12:56:56,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:56:56,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525532375] [2022-07-19 12:56:56,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:56:56,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:56:56,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:56:57,051 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 12:56:57,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:56:57,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525532375] [2022-07-19 12:56:57,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525532375] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:56:57,052 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:56:57,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:56:57,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234390220] [2022-07-19 12:56:57,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:56:57,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 12:56:57,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:56:57,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 12:56:57,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 12:56:57,054 INFO L87 Difference]: Start difference. First operand 11367 states and 15101 transitions. Second operand has 4 states, 4 states have (on average 81.25) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:57:02,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:57:02,513 INFO L93 Difference]: Finished difference Result 20033 states and 27483 transitions. [2022-07-19 12:57:02,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 12:57:02,534 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 81.25) internal successors, (325), 3 states have internal predecessors, (325), 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 325 [2022-07-19 12:57:02,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:57:02,579 INFO L225 Difference]: With dead ends: 20033 [2022-07-19 12:57:02,590 INFO L226 Difference]: Without dead ends: 11367 [2022-07-19 12:57:02,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 12:57:02,628 INFO L413 NwaCegarLoop]: 1775 mSDtfsCounter, 1140 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 7325 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1140 SdHoareTripleChecker+Valid, 2117 SdHoareTripleChecker+Invalid, 7333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 7325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-07-19 12:57:02,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1140 Valid, 2117 Invalid, 7333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 7325 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2022-07-19 12:57:02,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11367 states. [2022-07-19 12:57:02,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11367 to 11367. [2022-07-19 12:57:02,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11367 states, 11366 states have (on average 1.3274678866795706) internal successors, (15088), 11366 states have internal predecessors, (15088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:57:02,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11367 states to 11367 states and 15088 transitions. [2022-07-19 12:57:02,785 INFO L78 Accepts]: Start accepts. Automaton has 11367 states and 15088 transitions. Word has length 325 [2022-07-19 12:57:02,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:57:02,785 INFO L495 AbstractCegarLoop]: Abstraction has 11367 states and 15088 transitions. [2022-07-19 12:57:02,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 81.25) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:57:02,787 INFO L276 IsEmpty]: Start isEmpty. Operand 11367 states and 15088 transitions. [2022-07-19 12:57:02,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 511 [2022-07-19 12:57:02,791 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:57:02,792 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:57:02,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 12:57:02,792 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:57:02,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:57:02,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1714499808, now seen corresponding path program 1 times [2022-07-19 12:57:02,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:57:02,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228661722] [2022-07-19 12:57:02,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:57:02,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:57:02,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:57:03,008 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 12:57:03,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:57:03,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228661722] [2022-07-19 12:57:03,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228661722] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 12:57:03,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822833434] [2022-07-19 12:57:03,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:57:03,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 12:57:03,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 12:57:03,011 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 12:57:03,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 12:57:03,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:57:03,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 602 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 12:57:03,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 12:57:03,699 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-19 12:57:03,700 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 12:57:03,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822833434] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:57:03,700 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 12:57:03,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-07-19 12:57:03,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769144817] [2022-07-19 12:57:03,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:57:03,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:57:03,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:57:03,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:57:03,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 12:57:03,702 INFO L87 Difference]: Start difference. First operand 11367 states and 15088 transitions. Second operand has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 2 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:57:08,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:57:08,436 INFO L93 Difference]: Finished difference Result 24133 states and 33157 transitions. [2022-07-19 12:57:08,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:57:08,436 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 2 states have internal predecessors, (491), 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 510 [2022-07-19 12:57:08,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:57:08,465 INFO L225 Difference]: With dead ends: 24133 [2022-07-19 12:57:08,467 INFO L226 Difference]: Without dead ends: 15498 [2022-07-19 12:57:08,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 512 GetRequests, 509 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 12:57:08,477 INFO L413 NwaCegarLoop]: 1207 mSDtfsCounter, 1058 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 4576 mSolverCounterSat, 809 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1058 SdHoareTripleChecker+Valid, 1384 SdHoareTripleChecker+Invalid, 5385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 809 IncrementalHoareTripleChecker+Valid, 4576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-07-19 12:57:08,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1058 Valid, 1384 Invalid, 5385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [809 Valid, 4576 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-07-19 12:57:08,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15498 states. [2022-07-19 12:57:08,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15498 to 15496. [2022-07-19 12:57:08,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15496 states, 15495 states have (on average 1.2933849628912553) internal successors, (20041), 15495 states have internal predecessors, (20041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:57:08,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15496 states to 15496 states and 20041 transitions. [2022-07-19 12:57:08,638 INFO L78 Accepts]: Start accepts. Automaton has 15496 states and 20041 transitions. Word has length 510 [2022-07-19 12:57:08,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:57:08,639 INFO L495 AbstractCegarLoop]: Abstraction has 15496 states and 20041 transitions. [2022-07-19 12:57:08,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 2 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:57:08,639 INFO L276 IsEmpty]: Start isEmpty. Operand 15496 states and 20041 transitions. [2022-07-19 12:57:08,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 580 [2022-07-19 12:57:08,646 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:57:08,646 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:57:08,679 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-19 12:57:08,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 12:57:08,881 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:57:08,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:57:08,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1054282805, now seen corresponding path program 1 times [2022-07-19 12:57:08,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:57:08,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126414658] [2022-07-19 12:57:08,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:57:08,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:57:08,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:57:09,131 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 63 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 12:57:09,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:57:09,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126414658] [2022-07-19 12:57:09,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126414658] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 12:57:09,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321929808] [2022-07-19 12:57:09,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:57:09,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 12:57:09,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 12:57:09,144 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 12:57:09,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 12:57:09,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:57:09,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 12:57:09,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 12:57:09,373 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 12:57:09,374 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 12:57:09,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321929808] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:57:09,374 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 12:57:09,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-07-19 12:57:09,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876955538] [2022-07-19 12:57:09,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:57:09,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:57:09,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:57:09,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:57:09,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-19 12:57:09,376 INFO L87 Difference]: Start difference. First operand 15496 states and 20041 transitions. Second operand has 3 states, 3 states have (on average 193.0) internal successors, (579), 3 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:57:14,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:57:14,493 INFO L93 Difference]: Finished difference Result 40540 states and 53991 transitions. [2022-07-19 12:57:14,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:57:14,495 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 193.0) internal successors, (579), 3 states have internal predecessors, (579), 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 579 [2022-07-19 12:57:14,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:57:14,602 INFO L225 Difference]: With dead ends: 40540 [2022-07-19 12:57:14,602 INFO L226 Difference]: Without dead ends: 27776 [2022-07-19 12:57:14,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 582 GetRequests, 578 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-19 12:57:14,648 INFO L413 NwaCegarLoop]: 705 mSDtfsCounter, 2531 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 4053 mSolverCounterSat, 1472 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2531 SdHoareTripleChecker+Valid, 814 SdHoareTripleChecker+Invalid, 5525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1472 IncrementalHoareTripleChecker+Valid, 4053 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-07-19 12:57:14,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2531 Valid, 814 Invalid, 5525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1472 Valid, 4053 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-07-19 12:57:14,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27776 states. [2022-07-19 12:57:14,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27776 to 27772. [2022-07-19 12:57:14,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27772 states, 27771 states have (on average 1.2915271326203595) internal successors, (35867), 27771 states have internal predecessors, (35867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:57:14,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27772 states to 27772 states and 35867 transitions. [2022-07-19 12:57:14,950 INFO L78 Accepts]: Start accepts. Automaton has 27772 states and 35867 transitions. Word has length 579 [2022-07-19 12:57:14,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:57:14,950 INFO L495 AbstractCegarLoop]: Abstraction has 27772 states and 35867 transitions. [2022-07-19 12:57:14,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 193.0) internal successors, (579), 3 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:57:14,951 INFO L276 IsEmpty]: Start isEmpty. Operand 27772 states and 35867 transitions. [2022-07-19 12:57:14,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 585 [2022-07-19 12:57:14,954 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:57:14,954 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:57:14,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 12:57:15,172 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,SelfDestructingSolverStorable5 [2022-07-19 12:57:15,172 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:57:15,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:57:15,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1957660590, now seen corresponding path program 1 times [2022-07-19 12:57:15,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:57:15,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248626504] [2022-07-19 12:57:15,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:57:15,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:57:15,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:57:15,547 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-07-19 12:57:15,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:57:15,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248626504] [2022-07-19 12:57:15,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248626504] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:57:15,562 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:57:15,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 12:57:15,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482709198] [2022-07-19 12:57:15,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:57:15,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:57:15,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:57:15,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:57:15,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:57:15,564 INFO L87 Difference]: Start difference. First operand 27772 states and 35867 transitions. Second operand has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 2 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:57:20,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:57:20,603 INFO L93 Difference]: Finished difference Result 58285 states and 75896 transitions. [2022-07-19 12:57:20,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:57:20,604 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 2 states have internal predecessors, (512), 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 584 [2022-07-19 12:57:20,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:57:20,644 INFO L225 Difference]: With dead ends: 58285 [2022-07-19 12:57:20,645 INFO L226 Difference]: Without dead ends: 33245 [2022-07-19 12:57:20,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:57:20,670 INFO L413 NwaCegarLoop]: 687 mSDtfsCounter, 1383 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 3925 mSolverCounterSat, 1660 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1383 SdHoareTripleChecker+Valid, 733 SdHoareTripleChecker+Invalid, 5585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1660 IncrementalHoareTripleChecker+Valid, 3925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-07-19 12:57:20,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1383 Valid, 733 Invalid, 5585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1660 Valid, 3925 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2022-07-19 12:57:20,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33245 states. [2022-07-19 12:57:20,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33245 to 33235. [2022-07-19 12:57:20,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33235 states, 33234 states have (on average 1.228771739784558) internal successors, (40837), 33234 states have internal predecessors, (40837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:57:20,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33235 states to 33235 states and 40837 transitions. [2022-07-19 12:57:20,963 INFO L78 Accepts]: Start accepts. Automaton has 33235 states and 40837 transitions. Word has length 584 [2022-07-19 12:57:20,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:57:20,965 INFO L495 AbstractCegarLoop]: Abstraction has 33235 states and 40837 transitions. [2022-07-19 12:57:20,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 2 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:57:20,965 INFO L276 IsEmpty]: Start isEmpty. Operand 33235 states and 40837 transitions. [2022-07-19 12:57:20,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 602 [2022-07-19 12:57:20,969 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:57:20,969 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:57:20,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-19 12:57:20,970 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:57:20,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:57:20,971 INFO L85 PathProgramCache]: Analyzing trace with hash -601971848, now seen corresponding path program 1 times [2022-07-19 12:57:20,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:57:20,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059500951] [2022-07-19 12:57:20,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:57:20,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:57:21,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:57:21,206 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-07-19 12:57:21,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:57:21,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059500951] [2022-07-19 12:57:21,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059500951] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:57:21,207 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:57:21,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 12:57:21,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891785469] [2022-07-19 12:57:21,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:57:21,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:57:21,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:57:21,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:57:21,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:57:21,209 INFO L87 Difference]: Start difference. First operand 33235 states and 40837 transitions. Second operand has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 2 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:57:27,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:57:27,106 INFO L93 Difference]: Finished difference Result 91260 states and 113481 transitions. [2022-07-19 12:57:27,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:57:27,107 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 2 states have internal predecessors, (512), 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 601 [2022-07-19 12:57:27,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:57:27,170 INFO L225 Difference]: With dead ends: 91260 [2022-07-19 12:57:27,171 INFO L226 Difference]: Without dead ends: 60757 [2022-07-19 12:57:27,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:57:27,185 INFO L413 NwaCegarLoop]: 1747 mSDtfsCounter, 1350 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 4280 mSolverCounterSat, 1430 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1350 SdHoareTripleChecker+Valid, 2013 SdHoareTripleChecker+Invalid, 5710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1430 IncrementalHoareTripleChecker+Valid, 4280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-07-19 12:57:27,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1350 Valid, 2013 Invalid, 5710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1430 Valid, 4280 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2022-07-19 12:57:27,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60757 states. [2022-07-19 12:57:27,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60757 to 55276. [2022-07-19 12:57:27,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55276 states, 55275 states have (on average 1.1672003618272275) internal successors, (64517), 55275 states have internal predecessors, (64517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:57:27,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55276 states to 55276 states and 64517 transitions. [2022-07-19 12:57:27,676 INFO L78 Accepts]: Start accepts. Automaton has 55276 states and 64517 transitions. Word has length 601 [2022-07-19 12:57:27,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:57:27,677 INFO L495 AbstractCegarLoop]: Abstraction has 55276 states and 64517 transitions. [2022-07-19 12:57:27,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 2 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:57:27,677 INFO L276 IsEmpty]: Start isEmpty. Operand 55276 states and 64517 transitions. [2022-07-19 12:57:27,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 718 [2022-07-19 12:57:27,682 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:57:27,682 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-19 12:57:27,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-19 12:57:27,682 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:57:27,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:57:27,683 INFO L85 PathProgramCache]: Analyzing trace with hash 22569828, now seen corresponding path program 1 times [2022-07-19 12:57:27,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:57:27,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398656082] [2022-07-19 12:57:27,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:57:27,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:57:27,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:57:28,302 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 41 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 12:57:28,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:57:28,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398656082] [2022-07-19 12:57:28,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398656082] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 12:57:28,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504246068] [2022-07-19 12:57:28,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:57:28,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 12:57:28,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 12:57:28,305 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 12:57:28,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 12:57:28,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:57:28,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 831 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 12:57:28,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 12:57:28,541 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2022-07-19 12:57:28,542 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 12:57:28,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504246068] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:57:28,542 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 12:57:28,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2022-07-19 12:57:28,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276616821] [2022-07-19 12:57:28,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:57:28,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:57:28,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:57:28,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:57:28,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-07-19 12:57:28,544 INFO L87 Difference]: Start difference. First operand 55276 states and 64517 transitions. Second operand has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:57:32,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:57:32,920 INFO L93 Difference]: Finished difference Result 110553 states and 129119 transitions. [2022-07-19 12:57:32,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:57:32,921 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 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 717 [2022-07-19 12:57:32,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:57:32,986 INFO L225 Difference]: With dead ends: 110553 [2022-07-19 12:57:32,986 INFO L226 Difference]: Without dead ends: 58009 [2022-07-19 12:57:33,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 723 GetRequests, 716 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-07-19 12:57:33,020 INFO L413 NwaCegarLoop]: 2903 mSDtfsCounter, 1583 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 3678 mSolverCounterSat, 1466 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1583 SdHoareTripleChecker+Valid, 3085 SdHoareTripleChecker+Invalid, 5144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1466 IncrementalHoareTripleChecker+Valid, 3678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-07-19 12:57:33,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1583 Valid, 3085 Invalid, 5144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1466 Valid, 3678 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-07-19 12:57:33,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58009 states. [2022-07-19 12:57:33,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58009 to 58003. [2022-07-19 12:57:33,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58003 states, 58002 states have (on average 1.116909761732354) internal successors, (64783), 58002 states have internal predecessors, (64783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:57:33,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58003 states to 58003 states and 64783 transitions. [2022-07-19 12:57:33,614 INFO L78 Accepts]: Start accepts. Automaton has 58003 states and 64783 transitions. Word has length 717 [2022-07-19 12:57:33,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:57:33,615 INFO L495 AbstractCegarLoop]: Abstraction has 58003 states and 64783 transitions. [2022-07-19 12:57:33,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:57:33,615 INFO L276 IsEmpty]: Start isEmpty. Operand 58003 states and 64783 transitions. [2022-07-19 12:57:33,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 730 [2022-07-19 12:57:33,620 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:57:33,620 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-19 12:57:33,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 12:57:33,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 12:57:33,837 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:57:33,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:57:33,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1861895486, now seen corresponding path program 1 times [2022-07-19 12:57:33,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:57:33,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799165594] [2022-07-19 12:57:33,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:57:33,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:57:33,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:57:34,416 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 41 proven. 218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 12:57:34,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:57:34,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799165594] [2022-07-19 12:57:34,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799165594] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 12:57:34,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227189915] [2022-07-19 12:57:34,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:57:34,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 12:57:34,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 12:57:34,432 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 12:57:34,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 12:57:34,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:57:34,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 12:57:34,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 12:57:34,693 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2022-07-19 12:57:34,693 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 12:57:34,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227189915] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:57:34,694 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 12:57:34,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2022-07-19 12:57:34,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335937724] [2022-07-19 12:57:34,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:57:34,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:57:34,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:57:34,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:57:34,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-19 12:57:34,695 INFO L87 Difference]: Start difference. First operand 58003 states and 64783 transitions. Second operand has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:57:40,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:57:40,189 INFO L93 Difference]: Finished difference Result 129686 states and 145981 transitions. [2022-07-19 12:57:40,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:57:40,190 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 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 729 [2022-07-19 12:57:40,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:57:40,264 INFO L225 Difference]: With dead ends: 129686 [2022-07-19 12:57:40,264 INFO L226 Difference]: Without dead ends: 74415 [2022-07-19 12:57:40,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 734 GetRequests, 728 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-19 12:57:40,285 INFO L413 NwaCegarLoop]: 1314 mSDtfsCounter, 1582 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 4914 mSolverCounterSat, 723 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1582 SdHoareTripleChecker+Valid, 1438 SdHoareTripleChecker+Invalid, 5637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 723 IncrementalHoareTripleChecker+Valid, 4914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-07-19 12:57:40,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1582 Valid, 1438 Invalid, 5637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [723 Valid, 4914 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-07-19 12:57:40,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74415 states. [2022-07-19 12:57:40,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74415 to 70304. [2022-07-19 12:57:40,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70304 states, 70303 states have (on average 1.1228681564086882) internal successors, (78941), 70303 states have internal predecessors, (78941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:57:41,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70304 states to 70304 states and 78941 transitions. [2022-07-19 12:57:41,009 INFO L78 Accepts]: Start accepts. Automaton has 70304 states and 78941 transitions. Word has length 729 [2022-07-19 12:57:41,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:57:41,010 INFO L495 AbstractCegarLoop]: Abstraction has 70304 states and 78941 transitions. [2022-07-19 12:57:41,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:57:41,010 INFO L276 IsEmpty]: Start isEmpty. Operand 70304 states and 78941 transitions. [2022-07-19 12:57:41,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 808 [2022-07-19 12:57:41,044 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:57:41,045 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-19 12:57:41,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 12:57:41,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 12:57:41,260 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:57:41,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:57:41,260 INFO L85 PathProgramCache]: Analyzing trace with hash -2144527646, now seen corresponding path program 1 times [2022-07-19 12:57:41,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:57:41,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120074507] [2022-07-19 12:57:41,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:57:41,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:57:41,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:57:41,789 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 231 proven. 0 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2022-07-19 12:57:41,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:57:41,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120074507] [2022-07-19 12:57:41,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120074507] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:57:41,790 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:57:41,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 12:57:41,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721538179] [2022-07-19 12:57:41,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:57:41,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 12:57:41,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:57:41,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 12:57:41,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 12:57:41,793 INFO L87 Difference]: Start difference. First operand 70304 states and 78941 transitions. Second operand has 4 states, 4 states have (on average 149.75) internal successors, (599), 4 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:57:51,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:57:51,672 INFO L93 Difference]: Finished difference Result 226802 states and 258051 transitions. [2022-07-19 12:57:51,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 12:57:51,673 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 149.75) internal successors, (599), 4 states have internal predecessors, (599), 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 807 [2022-07-19 12:57:51,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:57:51,864 INFO L225 Difference]: With dead ends: 226802 [2022-07-19 12:57:51,864 INFO L226 Difference]: Without dead ends: 159230 [2022-07-19 12:57:51,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 12:57:51,899 INFO L413 NwaCegarLoop]: 968 mSDtfsCounter, 3242 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 9189 mSolverCounterSat, 2640 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3242 SdHoareTripleChecker+Valid, 1299 SdHoareTripleChecker+Invalid, 11829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2640 IncrementalHoareTripleChecker+Valid, 9189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time [2022-07-19 12:57:51,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3242 Valid, 1299 Invalid, 11829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2640 Valid, 9189 Invalid, 0 Unknown, 0 Unchecked, 9.1s Time] [2022-07-19 12:57:52,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159230 states. [2022-07-19 12:57:53,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159230 to 152298. [2022-07-19 12:57:53,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152298 states, 152297 states have (on average 1.1156555940038215) internal successors, (169911), 152297 states have internal predecessors, (169911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:57:53,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152298 states to 152298 states and 169911 transitions. [2022-07-19 12:57:53,884 INFO L78 Accepts]: Start accepts. Automaton has 152298 states and 169911 transitions. Word has length 807 [2022-07-19 12:57:53,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:57:53,885 INFO L495 AbstractCegarLoop]: Abstraction has 152298 states and 169911 transitions. [2022-07-19 12:57:53,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 149.75) internal successors, (599), 4 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:57:53,885 INFO L276 IsEmpty]: Start isEmpty. Operand 152298 states and 169911 transitions. [2022-07-19 12:57:53,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 884 [2022-07-19 12:57:53,900 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:57:53,901 INFO L195 NwaCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-19 12:57:53,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-19 12:57:53,901 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:57:53,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:57:53,902 INFO L85 PathProgramCache]: Analyzing trace with hash -27186972, now seen corresponding path program 1 times [2022-07-19 12:57:53,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:57:53,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3422248] [2022-07-19 12:57:53,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:57:53,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:57:54,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:57:54,380 INFO L134 CoverageAnalysis]: Checked inductivity of 673 backedges. 172 proven. 386 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-07-19 12:57:54,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:57:54,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3422248] [2022-07-19 12:57:54,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3422248] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 12:57:54,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55206409] [2022-07-19 12:57:54,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:57:54,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 12:57:54,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 12:57:54,396 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 12:57:54,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 12:57:54,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:57:54,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 1053 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 12:57:54,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 12:57:54,689 INFO L134 CoverageAnalysis]: Checked inductivity of 673 backedges. 256 proven. 0 refuted. 0 times theorem prover too weak. 417 trivial. 0 not checked. [2022-07-19 12:57:54,689 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 12:57:54,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55206409] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:57:54,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 12:57:54,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-07-19 12:57:54,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125168250] [2022-07-19 12:57:54,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:57:54,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:57:54,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:57:54,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:57:54,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-19 12:57:54,693 INFO L87 Difference]: Start difference. First operand 152298 states and 169911 transitions. Second operand has 3 states, 3 states have (on average 187.33333333333334) internal successors, (562), 3 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:58:01,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:58:01,275 INFO L93 Difference]: Finished difference Result 407088 states and 456713 transitions. [2022-07-19 12:58:01,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:58:01,275 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 187.33333333333334) internal successors, (562), 3 states have internal predecessors, (562), 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 883 [2022-07-19 12:58:01,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:58:01,803 INFO L225 Difference]: With dead ends: 407088 [2022-07-19 12:58:01,803 INFO L226 Difference]: Without dead ends: 257522 [2022-07-19 12:58:01,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 887 GetRequests, 884 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-19 12:58:01,878 INFO L413 NwaCegarLoop]: 1218 mSDtfsCounter, 1538 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 4187 mSolverCounterSat, 1842 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1538 SdHoareTripleChecker+Valid, 1344 SdHoareTripleChecker+Invalid, 6029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1842 IncrementalHoareTripleChecker+Valid, 4187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-07-19 12:58:01,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1538 Valid, 1344 Invalid, 6029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1842 Valid, 4187 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2022-07-19 12:58:02,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257522 states. [2022-07-19 12:58:04,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257522 to 251945. [2022-07-19 12:58:04,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251945 states, 251944 states have (on average 1.105749690407392) internal successors, (278587), 251944 states have internal predecessors, (278587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:58:05,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251945 states to 251945 states and 278587 transitions. [2022-07-19 12:58:05,024 INFO L78 Accepts]: Start accepts. Automaton has 251945 states and 278587 transitions. Word has length 883 [2022-07-19 12:58:05,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:58:05,039 INFO L495 AbstractCegarLoop]: Abstraction has 251945 states and 278587 transitions. [2022-07-19 12:58:05,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 187.33333333333334) internal successors, (562), 3 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:58:05,040 INFO L276 IsEmpty]: Start isEmpty. Operand 251945 states and 278587 transitions. [2022-07-19 12:58:05,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1007 [2022-07-19 12:58:05,050 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:58:05,056 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 3, 3, 3, 3, 3, 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, 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] [2022-07-19 12:58:05,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-19 12:58:05,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-19 12:58:05,257 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:58:05,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:58:05,257 INFO L85 PathProgramCache]: Analyzing trace with hash 250037035, now seen corresponding path program 1 times [2022-07-19 12:58:05,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:58:05,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081097787] [2022-07-19 12:58:05,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:58:05,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:58:05,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:58:05,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1098 backedges. 508 proven. 0 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2022-07-19 12:58:05,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:58:05,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081097787] [2022-07-19 12:58:05,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081097787] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:58:05,805 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:58:05,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:58:05,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173551108] [2022-07-19 12:58:05,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:58:05,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:58:05,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:58:05,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:58:05,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:58:05,808 INFO L87 Difference]: Start difference. First operand 251945 states and 278587 transitions. Second operand has 3 states, 3 states have (on average 213.66666666666666) internal successors, (641), 3 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:58:12,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:58:12,150 INFO L93 Difference]: Finished difference Result 501156 states and 554245 transitions. [2022-07-19 12:58:12,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:58:12,151 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 213.66666666666666) internal successors, (641), 3 states have internal predecessors, (641), 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 1006 [2022-07-19 12:58:12,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:58:12,608 INFO L225 Difference]: With dead ends: 501156 [2022-07-19 12:58:12,608 INFO L226 Difference]: Without dead ends: 243751 [2022-07-19 12:58:12,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:58:12,817 INFO L413 NwaCegarLoop]: 2877 mSDtfsCounter, 1357 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 4320 mSolverCounterSat, 712 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1357 SdHoareTripleChecker+Valid, 3058 SdHoareTripleChecker+Invalid, 5032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 712 IncrementalHoareTripleChecker+Valid, 4320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-07-19 12:58:12,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1357 Valid, 3058 Invalid, 5032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [712 Valid, 4320 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2022-07-19 12:58:13,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243751 states. [2022-07-19 12:58:15,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243751 to 242365. [2022-07-19 12:58:15,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242365 states, 242364 states have (on average 1.0844143519664637) internal successors, (262823), 242364 states have internal predecessors, (262823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:58:15,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242365 states to 242365 states and 262823 transitions. [2022-07-19 12:58:15,868 INFO L78 Accepts]: Start accepts. Automaton has 242365 states and 262823 transitions. Word has length 1006 [2022-07-19 12:58:15,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:58:15,868 INFO L495 AbstractCegarLoop]: Abstraction has 242365 states and 262823 transitions. [2022-07-19 12:58:15,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 213.66666666666666) internal successors, (641), 3 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:58:15,869 INFO L276 IsEmpty]: Start isEmpty. Operand 242365 states and 262823 transitions. [2022-07-19 12:58:15,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1019 [2022-07-19 12:58:15,878 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:58:15,879 INFO L195 NwaCegarLoop]: trace histogram [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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:58:15,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-19 12:58:15,879 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:58:15,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:58:15,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1583601661, now seen corresponding path program 1 times [2022-07-19 12:58:15,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:58:15,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566334146] [2022-07-19 12:58:15,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:58:15,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:58:16,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:58:16,529 INFO L134 CoverageAnalysis]: Checked inductivity of 976 backedges. 580 proven. 0 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2022-07-19 12:58:16,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:58:16,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566334146] [2022-07-19 12:58:16,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566334146] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:58:16,530 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:58:16,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:58:16,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906098886] [2022-07-19 12:58:16,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:58:16,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:58:16,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:58:16,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:58:16,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:58:16,532 INFO L87 Difference]: Start difference. First operand 242365 states and 262823 transitions. Second operand has 3 states, 3 states have (on average 239.0) internal successors, (717), 3 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:58:23,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:58:23,580 INFO L93 Difference]: Finished difference Result 578959 states and 631806 transitions. [2022-07-19 12:58:23,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:58:23,580 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 239.0) internal successors, (717), 3 states have internal predecessors, (717), 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 1018 [2022-07-19 12:58:23,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:58:24,082 INFO L225 Difference]: With dead ends: 578959 [2022-07-19 12:58:24,082 INFO L226 Difference]: Without dead ends: 339326 [2022-07-19 12:58:24,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:58:24,506 INFO L413 NwaCegarLoop]: 965 mSDtfsCounter, 1664 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 4397 mSolverCounterSat, 1570 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1664 SdHoareTripleChecker+Valid, 1080 SdHoareTripleChecker+Invalid, 5967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1570 IncrementalHoareTripleChecker+Valid, 4397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-07-19 12:58:24,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1664 Valid, 1080 Invalid, 5967 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1570 Valid, 4397 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2022-07-19 12:58:24,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339326 states. [2022-07-19 12:58:27,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339326 to 339320. [2022-07-19 12:58:28,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339320 states, 339319 states have (on average 1.0845605462706185) internal successors, (368012), 339319 states have internal predecessors, (368012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:58:28,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339320 states to 339320 states and 368012 transitions. [2022-07-19 12:58:29,000 INFO L78 Accepts]: Start accepts. Automaton has 339320 states and 368012 transitions. Word has length 1018 [2022-07-19 12:58:29,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:58:29,001 INFO L495 AbstractCegarLoop]: Abstraction has 339320 states and 368012 transitions. [2022-07-19 12:58:29,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 239.0) internal successors, (717), 3 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:58:29,001 INFO L276 IsEmpty]: Start isEmpty. Operand 339320 states and 368012 transitions. [2022-07-19 12:58:29,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1069 [2022-07-19 12:58:29,013 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:58:29,014 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 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, 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] [2022-07-19 12:58:29,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-19 12:58:29,014 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:58:29,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:58:29,015 INFO L85 PathProgramCache]: Analyzing trace with hash -386127581, now seen corresponding path program 1 times [2022-07-19 12:58:29,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:58:29,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408781281] [2022-07-19 12:58:29,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:58:29,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:58:29,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:58:29,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1306 backedges. 867 proven. 66 refuted. 0 times theorem prover too weak. 373 trivial. 0 not checked. [2022-07-19 12:58:29,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:58:29,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408781281] [2022-07-19 12:58:29,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408781281] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 12:58:29,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793909680] [2022-07-19 12:58:29,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:58:29,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 12:58:29,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 12:58:29,331 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 12:58:29,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 12:58:29,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:58:29,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 1266 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 12:58:29,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 12:58:30,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1306 backedges. 104 proven. 0 refuted. 0 times theorem prover too weak. 1202 trivial. 0 not checked. [2022-07-19 12:58:30,006 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 12:58:30,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793909680] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:58:30,007 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 12:58:30,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-07-19 12:58:30,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293180743] [2022-07-19 12:58:30,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:58:30,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:58:30,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:58:30,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:58:30,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 12:58:30,009 INFO L87 Difference]: Start difference. First operand 339320 states and 368012 transitions. Second operand has 3 states, 3 states have (on average 173.0) internal successors, (519), 3 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:58:37,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:58:37,363 INFO L93 Difference]: Finished difference Result 763373 states and 830581 transitions. [2022-07-19 12:58:37,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:58:37,380 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 173.0) internal successors, (519), 3 states have internal predecessors, (519), 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 1068 [2022-07-19 12:58:37,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:58:38,401 INFO L225 Difference]: With dead ends: 763373 [2022-07-19 12:58:38,402 INFO L226 Difference]: Without dead ends: 425420 [2022-07-19 12:58:38,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1071 GetRequests, 1068 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 12:58:38,492 INFO L413 NwaCegarLoop]: 1054 mSDtfsCounter, 1653 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 4270 mSolverCounterSat, 1869 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1653 SdHoareTripleChecker+Valid, 1136 SdHoareTripleChecker+Invalid, 6139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1869 IncrementalHoareTripleChecker+Valid, 4270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-07-19 12:58:38,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1653 Valid, 1136 Invalid, 6139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1869 Valid, 4270 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2022-07-19 12:58:38,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425420 states.