./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label54.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e8deba-10c6-42f8-91a5-7b91d852c3d3/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e8deba-10c6-42f8-91a5-7b91d852c3d3/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e8deba-10c6-42f8-91a5-7b91d852c3d3/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e8deba-10c6-42f8-91a5-7b91d852c3d3/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label54.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e8deba-10c6-42f8-91a5-7b91d852c3d3/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e8deba-10c6-42f8-91a5-7b91d852c3d3/bin/uautomizer-Dbtcem3rbc --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 83b9baf9f6deb0db64cb6e97ea77e31e0e6aa56bc46a9ba9c0c02a0377225524 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-02 20:35:31,801 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:35:31,805 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:35:31,865 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:35:31,866 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:35:31,872 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:35:31,875 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:35:31,879 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:35:31,881 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:35:31,888 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:35:31,889 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:35:31,892 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:35:31,893 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:35:31,896 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:35:31,898 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:35:31,900 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:35:31,902 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:35:31,904 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:35:31,906 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:35:31,915 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:35:31,917 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:35:31,918 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:35:31,922 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:35:31,923 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:35:31,934 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:35:31,934 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:35:31,935 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:35:31,937 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:35:31,938 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:35:31,939 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:35:31,940 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:35:31,941 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:35:31,944 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:35:31,946 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:35:31,949 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:35:31,949 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:35:31,950 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:35:31,951 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:35:31,951 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:35:31,952 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:35:31,953 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:35:31,955 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e8deba-10c6-42f8-91a5-7b91d852c3d3/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 20:35:32,004 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:35:32,004 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:35:32,005 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:35:32,005 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:35:32,007 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:35:32,007 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:35:32,008 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:35:32,008 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:35:32,009 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:35:32,009 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:35:32,011 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:35:32,011 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:35:32,011 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:35:32,012 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:35:32,012 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:35:32,012 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:35:32,013 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:35:32,013 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:35:32,013 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:35:32,014 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:35:32,014 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:35:32,015 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:35:32,015 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:35:32,015 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:35:32,016 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:35:32,016 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:35:32,018 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:35:32,018 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:35:32,019 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:35:32,019 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:35:32,019 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:35:32,020 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:35:32,020 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:35:32,021 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e8deba-10c6-42f8-91a5-7b91d852c3d3/bin/uautomizer-Dbtcem3rbc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e8deba-10c6-42f8-91a5-7b91d852c3d3/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 83b9baf9f6deb0db64cb6e97ea77e31e0e6aa56bc46a9ba9c0c02a0377225524 [2022-11-02 20:35:32,357 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:35:32,393 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:35:32,397 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:35:32,398 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:35:32,399 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:35:32,401 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e8deba-10c6-42f8-91a5-7b91d852c3d3/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/eca-rers2012/Problem03_label54.c [2022-11-02 20:35:32,506 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e8deba-10c6-42f8-91a5-7b91d852c3d3/bin/uautomizer-Dbtcem3rbc/data/aaec46896/41853ca2557e4de39c629b370e30a1d1/FLAG1e2ccca43 [2022-11-02 20:35:33,422 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:35:33,423 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e8deba-10c6-42f8-91a5-7b91d852c3d3/sv-benchmarks/c/eca-rers2012/Problem03_label54.c [2022-11-02 20:35:33,451 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e8deba-10c6-42f8-91a5-7b91d852c3d3/bin/uautomizer-Dbtcem3rbc/data/aaec46896/41853ca2557e4de39c629b370e30a1d1/FLAG1e2ccca43 [2022-11-02 20:35:33,966 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e8deba-10c6-42f8-91a5-7b91d852c3d3/bin/uautomizer-Dbtcem3rbc/data/aaec46896/41853ca2557e4de39c629b370e30a1d1 [2022-11-02 20:35:33,970 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:35:33,971 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:35:33,976 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:35:33,977 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:35:33,982 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:35:33,983 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:35:33" (1/1) ... [2022-11-02 20:35:33,985 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2134ccb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:35:33, skipping insertion in model container [2022-11-02 20:35:33,985 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:35:33" (1/1) ... [2022-11-02 20:35:33,996 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:35:34,107 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:35:34,858 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e8deba-10c6-42f8-91a5-7b91d852c3d3/sv-benchmarks/c/eca-rers2012/Problem03_label54.c[56627,56640] [2022-11-02 20:35:34,905 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:35:34,922 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:35:35,318 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e8deba-10c6-42f8-91a5-7b91d852c3d3/sv-benchmarks/c/eca-rers2012/Problem03_label54.c[56627,56640] [2022-11-02 20:35:35,342 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:35:35,366 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:35:35,367 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:35:35 WrapperNode [2022-11-02 20:35:35,367 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:35:35,369 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:35:35,369 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:35:35,369 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:35:35,379 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:35:35" (1/1) ... [2022-11-02 20:35:35,438 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:35:35" (1/1) ... [2022-11-02 20:35:35,552 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2022-11-02 20:35:35,553 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:35:35,554 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:35:35,554 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:35:35,554 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:35:35,566 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:35:35" (1/1) ... [2022-11-02 20:35:35,566 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:35:35" (1/1) ... [2022-11-02 20:35:35,577 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:35:35" (1/1) ... [2022-11-02 20:35:35,577 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:35:35" (1/1) ... [2022-11-02 20:35:35,684 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:35:35" (1/1) ... [2022-11-02 20:35:35,697 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:35:35" (1/1) ... [2022-11-02 20:35:35,713 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:35:35" (1/1) ... [2022-11-02 20:35:35,725 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:35:35" (1/1) ... [2022-11-02 20:35:35,743 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:35:35,745 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:35:35,745 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:35:35,745 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:35:35,746 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:35:35" (1/1) ... [2022-11-02 20:35:35,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:35:35,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e8deba-10c6-42f8-91a5-7b91d852c3d3/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:35:35,782 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e8deba-10c6-42f8-91a5-7b91d852c3d3/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:35:35,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e8deba-10c6-42f8-91a5-7b91d852c3d3/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:35:35,835 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:35:35,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:35:35,835 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:35:35,835 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:35:35,948 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:35:35,951 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:35:38,702 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:35:38,725 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:35:38,725 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-02 20:35:38,729 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:35:38 BoogieIcfgContainer [2022-11-02 20:35:38,730 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:35:38,733 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:35:38,733 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:35:38,738 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:35:38,738 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:35:33" (1/3) ... [2022-11-02 20:35:38,739 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@306d0b39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:35:38, skipping insertion in model container [2022-11-02 20:35:38,739 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:35:35" (2/3) ... [2022-11-02 20:35:38,740 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@306d0b39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:35:38, skipping insertion in model container [2022-11-02 20:35:38,740 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:35:38" (3/3) ... [2022-11-02 20:35:38,742 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label54.c [2022-11-02 20:35:38,765 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:35:38,765 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 20:35:38,866 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:35:38,875 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7c8490fe, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:35:38,875 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-02 20:35:38,898 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 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) [2022-11-02 20:35:38,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-11-02 20:35:38,918 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:35:38,919 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:35:38,920 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:35:38,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:35:38,926 INFO L85 PathProgramCache]: Analyzing trace with hash -590757190, now seen corresponding path program 1 times [2022-11-02 20:35:38,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:35:38,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561610428] [2022-11-02 20:35:38,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:35:38,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:35:39,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:35:39,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:35:39,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:35:39,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561610428] [2022-11-02 20:35:39,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561610428] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:35:39,877 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:35:39,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:35:39,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774257814] [2022-11-02 20:35:39,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:35:39,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:35:39,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:35:39,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:35:39,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:35:39,946 INFO L87 Difference]: Start difference. First operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 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) Second operand has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 2 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:35:41,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:35:41,713 INFO L93 Difference]: Finished difference Result 829 states and 1478 transitions. [2022-11-02 20:35:41,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:35:41,718 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 2 states have internal predecessors, (166), 0 states have call successors, (0), 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 166 [2022-11-02 20:35:41,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:35:41,736 INFO L225 Difference]: With dead ends: 829 [2022-11-02 20:35:41,736 INFO L226 Difference]: Without dead ends: 463 [2022-11-02 20:35:41,741 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 [2022-11-02 20:35:41,745 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 125 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 255 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-02 20:35:41,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 127 Invalid, 899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [255 Valid, 644 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-02 20:35:41,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2022-11-02 20:35:41,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 449. [2022-11-02 20:35:41,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 448 states have (on average 1.6183035714285714) internal successors, (725), 448 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:35:41,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 725 transitions. [2022-11-02 20:35:41,827 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 725 transitions. Word has length 166 [2022-11-02 20:35:41,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:35:41,829 INFO L495 AbstractCegarLoop]: Abstraction has 449 states and 725 transitions. [2022-11-02 20:35:41,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 2 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:35:41,829 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 725 transitions. [2022-11-02 20:35:41,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-11-02 20:35:41,838 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:35:41,839 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-02 20:35:41,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 20:35:41,840 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:35:41,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:35:41,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1027354506, now seen corresponding path program 1 times [2022-11-02 20:35:41,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:35:41,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646027290] [2022-11-02 20:35:41,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:35:41,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:35:41,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:35:42,274 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:35:42,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:35:42,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646027290] [2022-11-02 20:35:42,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646027290] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:35:42,275 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:35:42,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:35:42,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840828513] [2022-11-02 20:35:42,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:35:42,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:35:42,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:35:42,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:35:42,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:35:42,280 INFO L87 Difference]: Start difference. First operand 449 states and 725 transitions. Second operand has 3 states, 3 states have (on average 57.0) internal successors, (171), 2 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:35:43,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:35:43,575 INFO L93 Difference]: Finished difference Result 1319 states and 2138 transitions. [2022-11-02 20:35:43,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:35:43,577 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 2 states have internal predecessors, (171), 0 states have call successors, (0), 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 171 [2022-11-02 20:35:43,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:35:43,582 INFO L225 Difference]: With dead ends: 1319 [2022-11-02 20:35:43,582 INFO L226 Difference]: Without dead ends: 872 [2022-11-02 20:35:43,585 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 [2022-11-02 20:35:43,587 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 249 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:35:43,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 150 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 601 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-02 20:35:43,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 872 states. [2022-11-02 20:35:43,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 872 to 870. [2022-11-02 20:35:43,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 870 states, 869 states have (on average 1.5120828538550057) internal successors, (1314), 869 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:35:43,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 1314 transitions. [2022-11-02 20:35:43,647 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 1314 transitions. Word has length 171 [2022-11-02 20:35:43,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:35:43,648 INFO L495 AbstractCegarLoop]: Abstraction has 870 states and 1314 transitions. [2022-11-02 20:35:43,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 2 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:35:43,649 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 1314 transitions. [2022-11-02 20:35:43,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-11-02 20:35:43,660 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:35:43,661 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:35:43,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-02 20:35:43,662 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:35:43,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:35:43,663 INFO L85 PathProgramCache]: Analyzing trace with hash 2004202496, now seen corresponding path program 1 times [2022-11-02 20:35:43,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:35:43,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642941578] [2022-11-02 20:35:43,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:35:43,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:35:43,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:35:44,048 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 20:35:44,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:35:44,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642941578] [2022-11-02 20:35:44,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642941578] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:35:44,050 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:35:44,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:35:44,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017785705] [2022-11-02 20:35:44,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:35:44,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:35:44,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:35:44,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:35:44,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:35:44,053 INFO L87 Difference]: Start difference. First operand 870 states and 1314 transitions. Second operand has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:35:45,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:35:45,363 INFO L93 Difference]: Finished difference Result 2554 states and 3869 transitions. [2022-11-02 20:35:45,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:35:45,364 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 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 186 [2022-11-02 20:35:45,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:35:45,373 INFO L225 Difference]: With dead ends: 2554 [2022-11-02 20:35:45,373 INFO L226 Difference]: Without dead ends: 1686 [2022-11-02 20:35:45,375 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 [2022-11-02 20:35:45,377 INFO L413 NwaCegarLoop]: 388 mSDtfsCounter, 232 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:35:45,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 417 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-02 20:35:45,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1686 states. [2022-11-02 20:35:45,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1686 to 1684. [2022-11-02 20:35:45,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1684 states, 1683 states have (on average 1.3363042186571599) internal successors, (2249), 1683 states have internal predecessors, (2249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:35:45,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1684 states to 1684 states and 2249 transitions. [2022-11-02 20:35:45,433 INFO L78 Accepts]: Start accepts. Automaton has 1684 states and 2249 transitions. Word has length 186 [2022-11-02 20:35:45,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:35:45,434 INFO L495 AbstractCegarLoop]: Abstraction has 1684 states and 2249 transitions. [2022-11-02 20:35:45,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:35:45,434 INFO L276 IsEmpty]: Start isEmpty. Operand 1684 states and 2249 transitions. [2022-11-02 20:35:45,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2022-11-02 20:35:45,442 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:35:45,442 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:35:45,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-02 20:35:45,443 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:35:45,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:35:45,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1182972067, now seen corresponding path program 1 times [2022-11-02 20:35:45,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:35:45,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683646023] [2022-11-02 20:35:45,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:35:45,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:35:45,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:35:45,979 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:35:45,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:35:45,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683646023] [2022-11-02 20:35:45,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683646023] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:35:45,980 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:35:45,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:35:45,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139875282] [2022-11-02 20:35:45,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:35:45,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:35:45,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:35:45,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:35:45,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:35:45,982 INFO L87 Difference]: Start difference. First operand 1684 states and 2249 transitions. Second operand has 3 states, 3 states have (on average 63.0) internal successors, (189), 2 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:35:47,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:35:47,190 INFO L93 Difference]: Finished difference Result 5017 states and 6707 transitions. [2022-11-02 20:35:47,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:35:47,191 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 2 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 189 [2022-11-02 20:35:47,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:35:47,205 INFO L225 Difference]: With dead ends: 5017 [2022-11-02 20:35:47,206 INFO L226 Difference]: Without dead ends: 3335 [2022-11-02 20:35:47,211 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 [2022-11-02 20:35:47,223 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 259 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:35:47,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [259 Valid, 123 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-02 20:35:47,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3335 states. [2022-11-02 20:35:47,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3335 to 3326. [2022-11-02 20:35:47,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3326 states, 3325 states have (on average 1.3230075187969925) internal successors, (4399), 3325 states have internal predecessors, (4399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:35:47,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3326 states to 3326 states and 4399 transitions. [2022-11-02 20:35:47,327 INFO L78 Accepts]: Start accepts. Automaton has 3326 states and 4399 transitions. Word has length 189 [2022-11-02 20:35:47,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:35:47,328 INFO L495 AbstractCegarLoop]: Abstraction has 3326 states and 4399 transitions. [2022-11-02 20:35:47,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 2 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:35:47,329 INFO L276 IsEmpty]: Start isEmpty. Operand 3326 states and 4399 transitions. [2022-11-02 20:35:47,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-11-02 20:35:47,337 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:35:47,338 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:35:47,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-02 20:35:47,338 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:35:47,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:35:47,339 INFO L85 PathProgramCache]: Analyzing trace with hash -50841403, now seen corresponding path program 1 times [2022-11-02 20:35:47,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:35:47,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260192319] [2022-11-02 20:35:47,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:35:47,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:35:47,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:35:47,766 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:35:47,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:35:47,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260192319] [2022-11-02 20:35:47,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260192319] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:35:47,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:35:47,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:35:47,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112995439] [2022-11-02 20:35:47,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:35:47,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:35:47,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:35:47,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:35:47,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:35:47,774 INFO L87 Difference]: Start difference. First operand 3326 states and 4399 transitions. Second operand has 3 states, 3 states have (on average 64.0) internal successors, (192), 2 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:35:48,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:35:48,929 INFO L93 Difference]: Finished difference Result 9928 states and 13145 transitions. [2022-11-02 20:35:48,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:35:48,930 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 2 states have internal predecessors, (192), 0 states have call successors, (0), 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 192 [2022-11-02 20:35:48,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:35:48,959 INFO L225 Difference]: With dead ends: 9928 [2022-11-02 20:35:48,960 INFO L226 Difference]: Without dead ends: 6604 [2022-11-02 20:35:48,965 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 [2022-11-02 20:35:48,973 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 219 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 645 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:35:48,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 167 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 645 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-02 20:35:48,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6604 states. [2022-11-02 20:35:49,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6604 to 5768. [2022-11-02 20:35:49,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5768 states, 5767 states have (on average 1.3370903415987516) internal successors, (7711), 5767 states have internal predecessors, (7711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:35:49,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5768 states to 5768 states and 7711 transitions. [2022-11-02 20:35:49,289 INFO L78 Accepts]: Start accepts. Automaton has 5768 states and 7711 transitions. Word has length 192 [2022-11-02 20:35:49,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:35:49,290 INFO L495 AbstractCegarLoop]: Abstraction has 5768 states and 7711 transitions. [2022-11-02 20:35:49,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 2 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:35:49,296 INFO L276 IsEmpty]: Start isEmpty. Operand 5768 states and 7711 transitions. [2022-11-02 20:35:49,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-11-02 20:35:49,311 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:35:49,311 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 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] [2022-11-02 20:35:49,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-02 20:35:49,313 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:35:49,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:35:49,314 INFO L85 PathProgramCache]: Analyzing trace with hash 564713384, now seen corresponding path program 1 times [2022-11-02 20:35:49,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:35:49,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863530511] [2022-11-02 20:35:49,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:35:49,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:35:49,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:35:49,830 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 20:35:49,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:35:49,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863530511] [2022-11-02 20:35:49,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863530511] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:35:49,831 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:35:49,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:35:49,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501446152] [2022-11-02 20:35:49,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:35:49,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:35:49,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:35:49,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:35:49,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:35:49,834 INFO L87 Difference]: Start difference. First operand 5768 states and 7711 transitions. Second operand has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:35:51,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:35:51,227 INFO L93 Difference]: Finished difference Result 14591 states and 19420 transitions. [2022-11-02 20:35:51,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:35:51,228 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 0 states have call successors, (0), 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 201 [2022-11-02 20:35:51,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:35:51,264 INFO L225 Difference]: With dead ends: 14591 [2022-11-02 20:35:51,264 INFO L226 Difference]: Without dead ends: 8825 [2022-11-02 20:35:51,272 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 [2022-11-02 20:35:51,273 INFO L413 NwaCegarLoop]: 398 mSDtfsCounter, 202 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:35:51,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 421 Invalid, 736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 600 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-02 20:35:51,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8825 states. [2022-11-02 20:35:51,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8825 to 8821. [2022-11-02 20:35:51,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8821 states, 8820 states have (on average 1.2786848072562358) internal successors, (11278), 8820 states have internal predecessors, (11278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:35:51,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8821 states to 8821 states and 11278 transitions. [2022-11-02 20:35:51,518 INFO L78 Accepts]: Start accepts. Automaton has 8821 states and 11278 transitions. Word has length 201 [2022-11-02 20:35:51,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:35:51,520 INFO L495 AbstractCegarLoop]: Abstraction has 8821 states and 11278 transitions. [2022-11-02 20:35:51,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:35:51,521 INFO L276 IsEmpty]: Start isEmpty. Operand 8821 states and 11278 transitions. [2022-11-02 20:35:51,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-11-02 20:35:51,540 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:35:51,541 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:35:51,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-02 20:35:51,541 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:35:51,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:35:51,542 INFO L85 PathProgramCache]: Analyzing trace with hash -567138394, now seen corresponding path program 1 times [2022-11-02 20:35:51,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:35:51,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075819385] [2022-11-02 20:35:51,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:35:51,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:35:51,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:35:52,212 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 36 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:35:52,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:35:52,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075819385] [2022-11-02 20:35:52,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075819385] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:35:52,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017275840] [2022-11-02 20:35:52,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:35:52,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:35:52,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e8deba-10c6-42f8-91a5-7b91d852c3d3/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:35:52,220 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e8deba-10c6-42f8-91a5-7b91d852c3d3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:35:52,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e8deba-10c6-42f8-91a5-7b91d852c3d3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 20:35:52,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:35:52,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-02 20:35:52,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:35:52,654 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 20:35:52,656 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:35:52,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017275840] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:35:52,656 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:35:52,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-11-02 20:35:52,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307717228] [2022-11-02 20:35:52,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:35:52,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:35:52,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:35:52,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:35:52,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:35:52,659 INFO L87 Difference]: Start difference. First operand 8821 states and 11278 transitions. Second operand has 3 states, 3 states have (on average 66.0) internal successors, (198), 2 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:35:54,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:35:54,012 INFO L93 Difference]: Finished difference Result 25787 states and 33056 transitions. [2022-11-02 20:35:54,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:35:54,013 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 2 states have internal predecessors, (198), 0 states have call successors, (0), 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 203 [2022-11-02 20:35:54,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:35:54,084 INFO L225 Difference]: With dead ends: 25787 [2022-11-02 20:35:54,084 INFO L226 Difference]: Without dead ends: 16968 [2022-11-02 20:35:54,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:35:54,099 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 232 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 639 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:35:54,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 169 Invalid, 715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 639 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-02 20:35:54,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16968 states. [2022-11-02 20:35:54,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16968 to 16559. [2022-11-02 20:35:54,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16559 states, 16558 states have (on average 1.2510568909288562) internal successors, (20715), 16558 states have internal predecessors, (20715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:35:54,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16559 states to 16559 states and 20715 transitions. [2022-11-02 20:35:54,616 INFO L78 Accepts]: Start accepts. Automaton has 16559 states and 20715 transitions. Word has length 203 [2022-11-02 20:35:54,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:35:54,617 INFO L495 AbstractCegarLoop]: Abstraction has 16559 states and 20715 transitions. [2022-11-02 20:35:54,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 2 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:35:54,618 INFO L276 IsEmpty]: Start isEmpty. Operand 16559 states and 20715 transitions. [2022-11-02 20:35:54,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-11-02 20:35:54,646 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:35:54,647 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:35:54,697 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e8deba-10c6-42f8-91a5-7b91d852c3d3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-02 20:35:54,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e8deba-10c6-42f8-91a5-7b91d852c3d3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-02 20:35:54,866 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:35:54,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:35:54,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1701117943, now seen corresponding path program 1 times [2022-11-02 20:35:54,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:35:54,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735151655] [2022-11-02 20:35:54,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:35:54,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:35:54,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:35:55,565 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:35:55,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:35:55,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735151655] [2022-11-02 20:35:55,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735151655] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:35:55,567 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:35:55,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:35:55,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633737065] [2022-11-02 20:35:55,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:35:55,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:35:55,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:35:55,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:35:55,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:35:55,569 INFO L87 Difference]: Start difference. First operand 16559 states and 20715 transitions. Second operand has 3 states, 3 states have (on average 69.0) internal successors, (207), 2 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:35:56,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:35:56,985 INFO L93 Difference]: Finished difference Result 38428 states and 47966 transitions. [2022-11-02 20:35:56,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:35:56,986 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 2 states have internal predecessors, (207), 0 states have call successors, (0), 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 207 [2022-11-02 20:35:56,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:35:57,033 INFO L225 Difference]: With dead ends: 38428 [2022-11-02 20:35:57,034 INFO L226 Difference]: Without dead ends: 21871 [2022-11-02 20:35:57,052 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 [2022-11-02 20:35:57,053 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 197 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:35:57,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 195 Invalid, 759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 719 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-02 20:35:57,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21871 states. [2022-11-02 20:35:57,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21871 to 21857. [2022-11-02 20:35:57,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21857 states, 21856 states have (on average 1.2374633967789166) internal successors, (27046), 21856 states have internal predecessors, (27046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:35:57,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21857 states to 21857 states and 27046 transitions. [2022-11-02 20:35:57,584 INFO L78 Accepts]: Start accepts. Automaton has 21857 states and 27046 transitions. Word has length 207 [2022-11-02 20:35:57,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:35:57,584 INFO L495 AbstractCegarLoop]: Abstraction has 21857 states and 27046 transitions. [2022-11-02 20:35:57,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 2 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:35:57,585 INFO L276 IsEmpty]: Start isEmpty. Operand 21857 states and 27046 transitions. [2022-11-02 20:35:57,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2022-11-02 20:35:57,616 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:35:57,617 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:35:57,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-02 20:35:57,617 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:35:57,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:35:57,618 INFO L85 PathProgramCache]: Analyzing trace with hash -325061122, now seen corresponding path program 1 times [2022-11-02 20:35:57,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:35:57,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55015509] [2022-11-02 20:35:57,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:35:57,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:35:57,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:35:58,469 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 47 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:35:58,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:35:58,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55015509] [2022-11-02 20:35:58,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55015509] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:35:58,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101197463] [2022-11-02 20:35:58,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:35:58,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:35:58,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e8deba-10c6-42f8-91a5-7b91d852c3d3/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:35:58,474 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e8deba-10c6-42f8-91a5-7b91d852c3d3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:35:58,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e8deba-10c6-42f8-91a5-7b91d852c3d3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 20:35:58,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:35:58,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-02 20:35:58,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:35:59,052 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 20:35:59,052 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:35:59,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101197463] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:35:59,053 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:35:59,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-02 20:35:59,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367025578] [2022-11-02 20:35:59,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:35:59,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:35:59,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:35:59,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:35:59,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:35:59,056 INFO L87 Difference]: Start difference. First operand 21857 states and 27046 transitions. Second operand has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 3 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:00,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:36:00,680 INFO L93 Difference]: Finished difference Result 50637 states and 63488 transitions. [2022-11-02 20:36:00,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:36:00,681 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 3 states have internal predecessors, (209), 0 states have call successors, (0), 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 214 [2022-11-02 20:36:00,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:36:00,761 INFO L225 Difference]: With dead ends: 50637 [2022-11-02 20:36:00,761 INFO L226 Difference]: Without dead ends: 29391 [2022-11-02 20:36:00,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:36:00,789 INFO L413 NwaCegarLoop]: 368 mSDtfsCounter, 87 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:36:00,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 398 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 589 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-02 20:36:00,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29391 states. [2022-11-02 20:36:01,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29391 to 29378. [2022-11-02 20:36:01,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29378 states, 29377 states have (on average 1.2391326547979713) internal successors, (36402), 29377 states have internal predecessors, (36402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:01,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29378 states to 29378 states and 36402 transitions. [2022-11-02 20:36:01,623 INFO L78 Accepts]: Start accepts. Automaton has 29378 states and 36402 transitions. Word has length 214 [2022-11-02 20:36:01,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:36:01,623 INFO L495 AbstractCegarLoop]: Abstraction has 29378 states and 36402 transitions. [2022-11-02 20:36:01,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 3 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:01,624 INFO L276 IsEmpty]: Start isEmpty. Operand 29378 states and 36402 transitions. [2022-11-02 20:36:01,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2022-11-02 20:36:01,675 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:36:01,675 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-02 20:36:01,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e8deba-10c6-42f8-91a5-7b91d852c3d3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 20:36:01,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e8deba-10c6-42f8-91a5-7b91d852c3d3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:36:01,894 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:36:01,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:36:01,895 INFO L85 PathProgramCache]: Analyzing trace with hash 749729365, now seen corresponding path program 1 times [2022-11-02 20:36:01,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:36:01,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378838616] [2022-11-02 20:36:01,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:01,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:36:02,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:02,315 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-02 20:36:02,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:36:02,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378838616] [2022-11-02 20:36:02,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378838616] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:36:02,317 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:36:02,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:36:02,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968421974] [2022-11-02 20:36:02,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:36:02,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:36:02,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:36:02,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:36:02,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:36:02,320 INFO L87 Difference]: Start difference. First operand 29378 states and 36402 transitions. Second operand has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:03,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:36:03,142 INFO L93 Difference]: Finished difference Result 81392 states and 100767 transitions. [2022-11-02 20:36:03,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:36:03,143 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 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 227 [2022-11-02 20:36:03,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:36:03,263 INFO L225 Difference]: With dead ends: 81392 [2022-11-02 20:36:03,264 INFO L226 Difference]: Without dead ends: 52625 [2022-11-02 20:36:03,305 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 [2022-11-02 20:36:03,306 INFO L413 NwaCegarLoop]: 668 mSDtfsCounter, 332 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 963 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:36:03,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [332 Valid, 963 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 20:36:03,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52625 states. [2022-11-02 20:36:04,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52625 to 52622. [2022-11-02 20:36:04,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52622 states, 52621 states have (on average 1.2153892932479429) internal successors, (63955), 52621 states have internal predecessors, (63955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:04,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52622 states to 52622 states and 63955 transitions. [2022-11-02 20:36:04,837 INFO L78 Accepts]: Start accepts. Automaton has 52622 states and 63955 transitions. Word has length 227 [2022-11-02 20:36:04,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:36:04,838 INFO L495 AbstractCegarLoop]: Abstraction has 52622 states and 63955 transitions. [2022-11-02 20:36:04,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:04,838 INFO L276 IsEmpty]: Start isEmpty. Operand 52622 states and 63955 transitions. [2022-11-02 20:36:05,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2022-11-02 20:36:05,111 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:36:05,112 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:36:05,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-02 20:36:05,113 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:36:05,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:36:05,114 INFO L85 PathProgramCache]: Analyzing trace with hash -585838557, now seen corresponding path program 1 times [2022-11-02 20:36:05,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:36:05,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145524884] [2022-11-02 20:36:05,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:05,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:36:05,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:05,953 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 72 proven. 6 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-02 20:36:05,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:36:05,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145524884] [2022-11-02 20:36:05,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145524884] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:36:05,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50933060] [2022-11-02 20:36:05,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:05,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:36:05,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e8deba-10c6-42f8-91a5-7b91d852c3d3/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:36:05,956 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e8deba-10c6-42f8-91a5-7b91d852c3d3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:36:05,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e8deba-10c6-42f8-91a5-7b91d852c3d3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 20:36:06,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:06,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-02 20:36:06,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:36:06,274 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 20:36:06,280 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:36:06,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50933060] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:36:06,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:36:06,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-02 20:36:06,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927925622] [2022-11-02 20:36:06,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:36:06,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:36:06,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:36:06,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:36:06,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:36:06,285 INFO L87 Difference]: Start difference. First operand 52622 states and 63955 transitions. Second operand has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:08,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:36:08,308 INFO L93 Difference]: Finished difference Result 124531 states and 153524 transitions. [2022-11-02 20:36:08,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:36:08,309 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 0 states have call successors, (0), 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 233 [2022-11-02 20:36:08,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:36:08,419 INFO L225 Difference]: With dead ends: 124531 [2022-11-02 20:36:08,420 INFO L226 Difference]: Without dead ends: 72114 [2022-11-02 20:36:08,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:36:08,613 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 224 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:36:08,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 172 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-02 20:36:08,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72114 states. [2022-11-02 20:36:09,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72114 to 71704. [2022-11-02 20:36:09,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71704 states, 71703 states have (on average 1.183353555639234) internal successors, (84850), 71703 states have internal predecessors, (84850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:09,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71704 states to 71704 states and 84850 transitions. [2022-11-02 20:36:09,955 INFO L78 Accepts]: Start accepts. Automaton has 71704 states and 84850 transitions. Word has length 233 [2022-11-02 20:36:09,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:36:09,955 INFO L495 AbstractCegarLoop]: Abstraction has 71704 states and 84850 transitions. [2022-11-02 20:36:09,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:09,956 INFO L276 IsEmpty]: Start isEmpty. Operand 71704 states and 84850 transitions. [2022-11-02 20:36:10,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2022-11-02 20:36:10,004 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:36:10,005 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:36:10,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e8deba-10c6-42f8-91a5-7b91d852c3d3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 20:36:10,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e8deba-10c6-42f8-91a5-7b91d852c3d3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:36:10,225 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:36:10,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:36:10,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1614905310, now seen corresponding path program 1 times [2022-11-02 20:36:10,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:36:10,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874073956] [2022-11-02 20:36:10,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:10,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:36:10,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:11,262 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 71 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-02 20:36:11,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:36:11,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874073956] [2022-11-02 20:36:11,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874073956] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:36:11,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258427907] [2022-11-02 20:36:11,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:11,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:36:11,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e8deba-10c6-42f8-91a5-7b91d852c3d3/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:36:11,266 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e8deba-10c6-42f8-91a5-7b91d852c3d3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:36:11,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e8deba-10c6-42f8-91a5-7b91d852c3d3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 20:36:11,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:11,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-02 20:36:11,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:36:11,611 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 20:36:11,624 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:36:11,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258427907] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:36:11,625 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:36:11,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-02 20:36:11,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950035998] [2022-11-02 20:36:11,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:36:11,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:36:11,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:36:11,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:36:11,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:36:11,628 INFO L87 Difference]: Start difference. First operand 71704 states and 84850 transitions. Second operand has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:13,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:36:13,309 INFO L93 Difference]: Finished difference Result 143207 states and 169481 transitions. [2022-11-02 20:36:13,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:36:13,309 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 0 states have call successors, (0), 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 234 [2022-11-02 20:36:13,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:36:13,400 INFO L225 Difference]: With dead ends: 143207 [2022-11-02 20:36:13,400 INFO L226 Difference]: Without dead ends: 71708 [2022-11-02 20:36:13,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:36:13,439 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 260 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:36:13,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 97 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-02 20:36:13,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71708 states. [2022-11-02 20:36:14,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71708 to 71704. [2022-11-02 20:36:14,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71704 states, 71703 states have (on average 1.1726287603029162) internal successors, (84081), 71703 states have internal predecessors, (84081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:14,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71704 states to 71704 states and 84081 transitions. [2022-11-02 20:36:14,929 INFO L78 Accepts]: Start accepts. Automaton has 71704 states and 84081 transitions. Word has length 234 [2022-11-02 20:36:14,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:36:14,930 INFO L495 AbstractCegarLoop]: Abstraction has 71704 states and 84081 transitions. [2022-11-02 20:36:14,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:14,931 INFO L276 IsEmpty]: Start isEmpty. Operand 71704 states and 84081 transitions. [2022-11-02 20:36:14,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2022-11-02 20:36:14,997 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:36:14,998 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:36:15,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e8deba-10c6-42f8-91a5-7b91d852c3d3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-02 20:36:15,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e8deba-10c6-42f8-91a5-7b91d852c3d3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-02 20:36:15,215 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:36:15,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:36:15,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1686341063, now seen corresponding path program 1 times [2022-11-02 20:36:15,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:36:15,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487644114] [2022-11-02 20:36:15,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:15,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:36:15,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:15,624 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-02 20:36:15,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:36:15,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487644114] [2022-11-02 20:36:15,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487644114] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:36:15,625 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:36:15,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:36:15,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854562251] [2022-11-02 20:36:15,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:36:15,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:36:15,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:36:15,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:36:15,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:36:15,628 INFO L87 Difference]: Start difference. First operand 71704 states and 84081 transitions. Second operand has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:17,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:36:17,603 INFO L93 Difference]: Finished difference Result 154410 states and 181101 transitions. [2022-11-02 20:36:17,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:36:17,604 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 237 [2022-11-02 20:36:17,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:36:17,724 INFO L225 Difference]: With dead ends: 154410 [2022-11-02 20:36:17,724 INFO L226 Difference]: Without dead ends: 82911 [2022-11-02 20:36:17,767 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 [2022-11-02 20:36:17,768 INFO L413 NwaCegarLoop]: 367 mSDtfsCounter, 214 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:36:17,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 388 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-02 20:36:17,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82911 states. [2022-11-02 20:36:18,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82911 to 69463. [2022-11-02 20:36:19,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69463 states, 69462 states have (on average 1.1716046183524804) internal successors, (81382), 69462 states have internal predecessors, (81382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:19,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69463 states to 69463 states and 81382 transitions. [2022-11-02 20:36:19,109 INFO L78 Accepts]: Start accepts. Automaton has 69463 states and 81382 transitions. Word has length 237 [2022-11-02 20:36:19,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:36:19,110 INFO L495 AbstractCegarLoop]: Abstraction has 69463 states and 81382 transitions. [2022-11-02 20:36:19,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:19,110 INFO L276 IsEmpty]: Start isEmpty. Operand 69463 states and 81382 transitions. [2022-11-02 20:36:19,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2022-11-02 20:36:19,145 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:36:19,145 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-02 20:36:19,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-02 20:36:19,146 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:36:19,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:36:19,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1649515910, now seen corresponding path program 1 times [2022-11-02 20:36:19,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:36:19,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252891206] [2022-11-02 20:36:19,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:19,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:36:19,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:20,233 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:36:20,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:36:20,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252891206] [2022-11-02 20:36:20,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252891206] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:36:20,234 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:36:20,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:36:20,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725507242] [2022-11-02 20:36:20,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:36:20,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:36:20,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:36:20,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:36:20,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:36:20,237 INFO L87 Difference]: Start difference. First operand 69463 states and 81382 transitions. Second operand has 3 states, 3 states have (on average 80.0) internal successors, (240), 2 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:21,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:36:21,737 INFO L93 Difference]: Finished difference Result 139129 states and 163011 transitions. [2022-11-02 20:36:21,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:36:21,738 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.0) internal successors, (240), 2 states have internal predecessors, (240), 0 states have call successors, (0), 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 240 [2022-11-02 20:36:21,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:36:21,840 INFO L225 Difference]: With dead ends: 139129 [2022-11-02 20:36:21,840 INFO L226 Difference]: Without dead ends: 69871 [2022-11-02 20:36:22,224 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 [2022-11-02 20:36:22,225 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 133 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-02 20:36:22,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 199 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-02 20:36:22,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69871 states. [2022-11-02 20:36:23,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69871 to 69869. [2022-11-02 20:36:23,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69869 states, 69868 states have (on average 1.1712515028339154) internal successors, (81833), 69868 states have internal predecessors, (81833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:23,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69869 states to 69869 states and 81833 transitions. [2022-11-02 20:36:23,328 INFO L78 Accepts]: Start accepts. Automaton has 69869 states and 81833 transitions. Word has length 240 [2022-11-02 20:36:23,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:36:23,328 INFO L495 AbstractCegarLoop]: Abstraction has 69869 states and 81833 transitions. [2022-11-02 20:36:23,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.0) internal successors, (240), 2 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:23,329 INFO L276 IsEmpty]: Start isEmpty. Operand 69869 states and 81833 transitions. [2022-11-02 20:36:23,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2022-11-02 20:36:23,372 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:36:23,372 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 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] [2022-11-02 20:36:23,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-02 20:36:23,373 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:36:23,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:36:23,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1843214196, now seen corresponding path program 1 times [2022-11-02 20:36:23,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:36:23,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968725138] [2022-11-02 20:36:23,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:23,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:36:23,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:23,890 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-11-02 20:36:23,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:36:23,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968725138] [2022-11-02 20:36:23,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968725138] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:36:23,891 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:36:23,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:36:23,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170427110] [2022-11-02 20:36:23,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:36:23,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:36:23,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:36:23,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:36:23,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:36:23,894 INFO L87 Difference]: Start difference. First operand 69869 states and 81833 transitions. Second operand has 4 states, 4 states have (on average 53.5) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:26,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:36:26,409 INFO L93 Difference]: Finished difference Result 139603 states and 163557 transitions. [2022-11-02 20:36:26,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:36:26,410 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 53.5) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 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 253 [2022-11-02 20:36:26,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:36:26,483 INFO L225 Difference]: With dead ends: 139603 [2022-11-02 20:36:26,483 INFO L226 Difference]: Without dead ends: 70345 [2022-11-02 20:36:26,503 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 [2022-11-02 20:36:26,504 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 411 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 1137 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 1347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 1137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-02 20:36:26,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [411 Valid, 174 Invalid, 1347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 1137 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-02 20:36:26,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70345 states. [2022-11-02 20:36:27,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70345 to 67634. [2022-11-02 20:36:27,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67634 states, 67633 states have (on average 1.173081188177369) internal successors, (79339), 67633 states have internal predecessors, (79339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:27,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67634 states to 67634 states and 79339 transitions. [2022-11-02 20:36:27,778 INFO L78 Accepts]: Start accepts. Automaton has 67634 states and 79339 transitions. Word has length 253 [2022-11-02 20:36:27,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:36:27,779 INFO L495 AbstractCegarLoop]: Abstraction has 67634 states and 79339 transitions. [2022-11-02 20:36:27,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 53.5) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:27,779 INFO L276 IsEmpty]: Start isEmpty. Operand 67634 states and 79339 transitions. [2022-11-02 20:36:27,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2022-11-02 20:36:27,814 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:36:27,814 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 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] [2022-11-02 20:36:27,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-02 20:36:27,815 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:36:27,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:36:27,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1370069441, now seen corresponding path program 1 times [2022-11-02 20:36:27,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:36:27,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111009073] [2022-11-02 20:36:27,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:27,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:36:27,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:28,266 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 109 proven. 6 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-11-02 20:36:28,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:36:28,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111009073] [2022-11-02 20:36:28,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111009073] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:36:28,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079624540] [2022-11-02 20:36:28,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:28,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:36:28,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e8deba-10c6-42f8-91a5-7b91d852c3d3/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:36:28,269 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e8deba-10c6-42f8-91a5-7b91d852c3d3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:36:28,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e8deba-10c6-42f8-91a5-7b91d852c3d3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 20:36:28,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:28,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-02 20:36:28,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:36:28,595 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 151 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-11-02 20:36:28,595 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:36:28,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079624540] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:36:28,596 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:36:28,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-02 20:36:28,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45563166] [2022-11-02 20:36:28,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:36:28,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:36:28,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:36:28,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:36:28,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:36:28,598 INFO L87 Difference]: Start difference. First operand 67634 states and 79339 transitions. Second operand has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:30,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:36:30,390 INFO L93 Difference]: Finished difference Result 132475 states and 155143 transitions. [2022-11-02 20:36:30,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:36:30,390 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 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 260 [2022-11-02 20:36:30,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:36:30,460 INFO L225 Difference]: With dead ends: 132475 [2022-11-02 20:36:30,460 INFO L226 Difference]: Without dead ends: 65046 [2022-11-02 20:36:30,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 259 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:36:30,485 INFO L413 NwaCegarLoop]: 363 mSDtfsCounter, 214 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:36:30,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 384 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-02 20:36:30,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65046 states. [2022-11-02 20:36:31,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65046 to 64792. [2022-11-02 20:36:31,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64792 states, 64791 states have (on average 1.1605006868237873) internal successors, (75190), 64791 states have internal predecessors, (75190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:31,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64792 states to 64792 states and 75190 transitions. [2022-11-02 20:36:31,695 INFO L78 Accepts]: Start accepts. Automaton has 64792 states and 75190 transitions. Word has length 260 [2022-11-02 20:36:31,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:36:31,695 INFO L495 AbstractCegarLoop]: Abstraction has 64792 states and 75190 transitions. [2022-11-02 20:36:31,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:31,696 INFO L276 IsEmpty]: Start isEmpty. Operand 64792 states and 75190 transitions. [2022-11-02 20:36:31,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2022-11-02 20:36:31,741 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:36:31,741 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-02 20:36:31,768 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e8deba-10c6-42f8-91a5-7b91d852c3d3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-02 20:36:31,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e8deba-10c6-42f8-91a5-7b91d852c3d3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-02 20:36:31,942 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:36:31,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:36:31,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1308759228, now seen corresponding path program 1 times [2022-11-02 20:36:31,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:36:31,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632574627] [2022-11-02 20:36:31,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:31,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:36:32,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:32,510 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 114 proven. 6 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-11-02 20:36:32,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:36:32,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632574627] [2022-11-02 20:36:32,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632574627] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:36:32,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186722657] [2022-11-02 20:36:32,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:32,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:36:32,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e8deba-10c6-42f8-91a5-7b91d852c3d3/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:36:32,516 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e8deba-10c6-42f8-91a5-7b91d852c3d3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:36:32,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e8deba-10c6-42f8-91a5-7b91d852c3d3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 20:36:32,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:32,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-02 20:36:32,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:36:32,863 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 180 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-02 20:36:32,863 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:36:32,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186722657] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:36:32,864 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:36:32,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-02 20:36:32,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730645784] [2022-11-02 20:36:32,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:36:32,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:36:32,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:36:32,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:36:32,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:36:32,869 INFO L87 Difference]: Start difference. First operand 64792 states and 75190 transitions. Second operand has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:34,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:36:34,277 INFO L93 Difference]: Finished difference Result 182479 states and 211840 transitions. [2022-11-02 20:36:34,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:36:34,277 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 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 265 [2022-11-02 20:36:34,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:36:34,419 INFO L225 Difference]: With dead ends: 182479 [2022-11-02 20:36:34,419 INFO L226 Difference]: Without dead ends: 118298 [2022-11-02 20:36:34,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:36:34,452 INFO L413 NwaCegarLoop]: 630 mSDtfsCounter, 303 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 900 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:36:34,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [303 Valid, 900 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-02 20:36:34,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118298 states. [2022-11-02 20:36:35,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118298 to 111800. [2022-11-02 20:36:36,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111800 states, 111799 states have (on average 1.1472821760480862) internal successors, (128265), 111799 states have internal predecessors, (128265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:36,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111800 states to 111800 states and 128265 transitions. [2022-11-02 20:36:36,177 INFO L78 Accepts]: Start accepts. Automaton has 111800 states and 128265 transitions. Word has length 265 [2022-11-02 20:36:36,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:36:36,177 INFO L495 AbstractCegarLoop]: Abstraction has 111800 states and 128265 transitions. [2022-11-02 20:36:36,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:36,178 INFO L276 IsEmpty]: Start isEmpty. Operand 111800 states and 128265 transitions. [2022-11-02 20:36:36,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2022-11-02 20:36:36,228 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:36:36,228 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:36:36,265 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e8deba-10c6-42f8-91a5-7b91d852c3d3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-02 20:36:36,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e8deba-10c6-42f8-91a5-7b91d852c3d3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-02 20:36:36,433 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:36:36,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:36:36,434 INFO L85 PathProgramCache]: Analyzing trace with hash -385750121, now seen corresponding path program 1 times [2022-11-02 20:36:36,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:36:36,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055395987] [2022-11-02 20:36:36,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:36,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:36:36,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:37,545 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 116 proven. 6 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-02 20:36:37,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:36:37,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055395987] [2022-11-02 20:36:37,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055395987] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:36:37,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94747922] [2022-11-02 20:36:37,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:37,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:36:37,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e8deba-10c6-42f8-91a5-7b91d852c3d3/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:36:37,549 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e8deba-10c6-42f8-91a5-7b91d852c3d3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:36:37,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e8deba-10c6-42f8-91a5-7b91d852c3d3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-02 20:36:37,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:37,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 586 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-02 20:36:37,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:36:38,119 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 135 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-11-02 20:36:38,120 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:36:38,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94747922] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:36:38,120 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:36:38,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-02 20:36:38,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369632293] [2022-11-02 20:36:38,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:36:38,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:36:38,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:36:38,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:36:38,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:36:38,122 INFO L87 Difference]: Start difference. First operand 111800 states and 128265 transitions. Second operand has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:40,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:36:40,173 INFO L93 Difference]: Finished difference Result 222177 states and 254951 transitions. [2022-11-02 20:36:40,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:36:40,176 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 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 267 [2022-11-02 20:36:40,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:36:40,324 INFO L225 Difference]: With dead ends: 222177 [2022-11-02 20:36:40,325 INFO L226 Difference]: Without dead ends: 110988 [2022-11-02 20:36:40,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:36:40,367 INFO L413 NwaCegarLoop]: 321 mSDtfsCounter, 104 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-02 20:36:40,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 342 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-02 20:36:40,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110988 states. [2022-11-02 20:36:42,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110988 to 110577. [2022-11-02 20:36:42,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110577 states, 110576 states have (on average 1.140771957748517) internal successors, (126142), 110576 states have internal predecessors, (126142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:42,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110577 states to 110577 states and 126142 transitions. [2022-11-02 20:36:42,327 INFO L78 Accepts]: Start accepts. Automaton has 110577 states and 126142 transitions. Word has length 267 [2022-11-02 20:36:42,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:36:42,327 INFO L495 AbstractCegarLoop]: Abstraction has 110577 states and 126142 transitions. [2022-11-02 20:36:42,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:42,328 INFO L276 IsEmpty]: Start isEmpty. Operand 110577 states and 126142 transitions. [2022-11-02 20:36:42,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2022-11-02 20:36:42,371 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:36:42,371 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:36:42,399 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e8deba-10c6-42f8-91a5-7b91d852c3d3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-02 20:36:42,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54e8deba-10c6-42f8-91a5-7b91d852c3d3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-02 20:36:42,573 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:36:42,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:36:42,573 INFO L85 PathProgramCache]: Analyzing trace with hash 77971101, now seen corresponding path program 1 times [2022-11-02 20:36:42,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:36:42,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410723346] [2022-11-02 20:36:42,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:42,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:36:42,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:42,953 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-02 20:36:42,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:36:42,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410723346] [2022-11-02 20:36:42,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410723346] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:36:42,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:36:42,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:36:42,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771771311] [2022-11-02 20:36:42,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:36:42,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:36:42,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:36:42,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:36:42,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:36:42,956 INFO L87 Difference]: Start difference. First operand 110577 states and 126142 transitions. Second operand has 4 states, 4 states have (on average 62.5) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:45,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:36:45,177 INFO L93 Difference]: Finished difference Result 190923 states and 217676 transitions. [2022-11-02 20:36:45,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:36:45,178 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 62.5) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 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 273 [2022-11-02 20:36:45,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:36:45,287 INFO L225 Difference]: With dead ends: 190923 [2022-11-02 20:36:45,287 INFO L226 Difference]: Without dead ends: 77709 [2022-11-02 20:36:45,334 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 [2022-11-02 20:36:45,335 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 447 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 804 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:36:45,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [447 Valid, 59 Invalid, 936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 804 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-02 20:36:45,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77709 states. [2022-11-02 20:36:46,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77709 to 75474. [2022-11-02 20:36:46,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75474 states, 75473 states have (on average 1.0891709618009089) internal successors, (82203), 75473 states have internal predecessors, (82203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:46,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75474 states to 75474 states and 82203 transitions. [2022-11-02 20:36:46,691 INFO L78 Accepts]: Start accepts. Automaton has 75474 states and 82203 transitions. Word has length 273 [2022-11-02 20:36:46,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:36:46,692 INFO L495 AbstractCegarLoop]: Abstraction has 75474 states and 82203 transitions. [2022-11-02 20:36:46,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 62.5) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:46,692 INFO L276 IsEmpty]: Start isEmpty. Operand 75474 states and 82203 transitions. [2022-11-02 20:36:46,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2022-11-02 20:36:46,728 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:36:46,728 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-02 20:36:46,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-02 20:36:46,729 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:36:46,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:36:46,730 INFO L85 PathProgramCache]: Analyzing trace with hash 672800317, now seen corresponding path program 1 times [2022-11-02 20:36:46,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:36:46,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239375081] [2022-11-02 20:36:46,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:46,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:36:46,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:47,125 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-11-02 20:36:47,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:36:47,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239375081] [2022-11-02 20:36:47,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239375081] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:36:47,126 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:36:47,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:36:47,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121504287] [2022-11-02 20:36:47,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:36:47,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:36:47,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:36:47,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:36:47,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:36:47,128 INFO L87 Difference]: Start difference. First operand 75474 states and 82203 transitions. Second operand has 3 states, 3 states have (on average 67.0) internal successors, (201), 2 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:49,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:36:49,057 INFO L93 Difference]: Finished difference Result 162142 states and 176746 transitions. [2022-11-02 20:36:49,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:36:49,058 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 2 states have internal predecessors, (201), 0 states have call successors, (0), 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 274 [2022-11-02 20:36:49,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:36:49,157 INFO L225 Difference]: With dead ends: 162142 [2022-11-02 20:36:49,157 INFO L226 Difference]: Without dead ends: 87279 [2022-11-02 20:36:49,196 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 [2022-11-02 20:36:49,197 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 202 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:36:49,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 120 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 592 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-02 20:36:49,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87279 states. [2022-11-02 20:36:50,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87279 to 86259. [2022-11-02 20:36:50,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86259 states, 86258 states have (on average 1.090727816550349) internal successors, (94084), 86258 states have internal predecessors, (94084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:50,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86259 states to 86259 states and 94084 transitions. [2022-11-02 20:36:50,758 INFO L78 Accepts]: Start accepts. Automaton has 86259 states and 94084 transitions. Word has length 274 [2022-11-02 20:36:50,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:36:50,759 INFO L495 AbstractCegarLoop]: Abstraction has 86259 states and 94084 transitions. [2022-11-02 20:36:50,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 2 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:50,759 INFO L276 IsEmpty]: Start isEmpty. Operand 86259 states and 94084 transitions. [2022-11-02 20:36:50,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2022-11-02 20:36:50,787 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:36:50,788 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:36:50,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-02 20:36:50,788 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:36:50,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:36:50,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1441807218, now seen corresponding path program 1 times [2022-11-02 20:36:50,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:36:50,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191285359] [2022-11-02 20:36:50,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:50,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:36:50,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:51,034 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:36:51,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:36:51,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191285359] [2022-11-02 20:36:51,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191285359] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:36:51,035 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:36:51,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:36:51,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374949918] [2022-11-02 20:36:51,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:36:51,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:36:51,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:36:51,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:36:51,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:36:51,038 INFO L87 Difference]: Start difference. First operand 86259 states and 94084 transitions. Second operand has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:52,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:36:52,741 INFO L93 Difference]: Finished difference Result 155208 states and 168978 transitions. [2022-11-02 20:36:52,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:36:52,742 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 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 281 [2022-11-02 20:36:52,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:36:52,819 INFO L225 Difference]: With dead ends: 155208 [2022-11-02 20:36:52,819 INFO L226 Difference]: Without dead ends: 77499 [2022-11-02 20:36:52,852 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 [2022-11-02 20:36:52,853 INFO L413 NwaCegarLoop]: 296 mSDtfsCounter, 218 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:36:52,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 312 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 485 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-02 20:36:52,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77499 states. [2022-11-02 20:36:53,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77499 to 76065. [2022-11-02 20:36:54,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76065 states, 76064 states have (on average 1.0792490534286916) internal successors, (82092), 76064 states have internal predecessors, (82092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:54,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76065 states to 76065 states and 82092 transitions. [2022-11-02 20:36:54,109 INFO L78 Accepts]: Start accepts. Automaton has 76065 states and 82092 transitions. Word has length 281 [2022-11-02 20:36:54,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:36:54,110 INFO L495 AbstractCegarLoop]: Abstraction has 76065 states and 82092 transitions. [2022-11-02 20:36:54,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:54,110 INFO L276 IsEmpty]: Start isEmpty. Operand 76065 states and 82092 transitions. [2022-11-02 20:36:54,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2022-11-02 20:36:54,138 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:36:54,139 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-02 20:36:54,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-02 20:36:54,139 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:36:54,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:36:54,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1117147942, now seen corresponding path program 1 times [2022-11-02 20:36:54,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:36:54,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229856083] [2022-11-02 20:36:54,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:54,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:36:54,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:54,438 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-02 20:36:54,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:36:54,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229856083] [2022-11-02 20:36:54,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229856083] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:36:54,438 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:36:54,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:36:54,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486403997] [2022-11-02 20:36:54,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:36:54,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:36:54,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:36:54,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:36:54,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:36:54,440 INFO L87 Difference]: Start difference. First operand 76065 states and 82092 transitions. Second operand has 4 states, 4 states have (on average 67.25) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)