./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec9_product09.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 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_bd9721d0-323b-4179-8c76-f3bd702632df/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9721d0-323b-4179-8c76-f3bd702632df/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9721d0-323b-4179-8c76-f3bd702632df/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9721d0-323b-4179-8c76-f3bd702632df/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec9_product09.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9721d0-323b-4179-8c76-f3bd702632df/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9721d0-323b-4179-8c76-f3bd702632df/bin/utaipan-g80aRyZoba --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash cc5b9f71a5434758faa1f6f3febe6f12c158e9feff610b938ef9d4658acd21ff --- 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-b5237d8 [2022-11-22 02:24:37,810 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 02:24:37,813 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 02:24:37,861 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 02:24:37,862 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 02:24:37,866 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 02:24:37,868 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 02:24:37,870 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 02:24:37,872 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 02:24:37,873 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 02:24:37,874 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 02:24:37,875 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 02:24:37,876 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 02:24:37,877 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 02:24:37,878 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 02:24:37,882 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 02:24:37,884 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 02:24:37,889 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 02:24:37,892 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 02:24:37,899 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 02:24:37,903 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 02:24:37,906 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 02:24:37,908 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 02:24:37,909 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 02:24:37,919 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 02:24:37,920 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 02:24:37,920 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 02:24:37,923 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 02:24:37,924 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 02:24:37,925 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 02:24:37,925 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 02:24:37,926 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 02:24:37,928 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 02:24:37,930 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 02:24:37,932 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 02:24:37,933 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 02:24:37,934 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 02:24:37,934 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 02:24:37,935 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 02:24:37,936 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 02:24:37,937 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 02:24:37,949 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9721d0-323b-4179-8c76-f3bd702632df/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-22 02:24:38,001 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 02:24:38,002 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 02:24:38,003 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 02:24:38,003 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 02:24:38,004 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 02:24:38,004 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 02:24:38,005 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 02:24:38,005 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 02:24:38,005 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 02:24:38,005 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 02:24:38,007 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 02:24:38,007 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 02:24:38,007 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 02:24:38,007 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 02:24:38,007 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 02:24:38,008 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 02:24:38,008 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 02:24:38,008 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 02:24:38,009 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 02:24:38,009 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 02:24:38,009 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 02:24:38,010 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 02:24:38,010 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 02:24:38,010 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 02:24:38,010 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 02:24:38,010 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 02:24:38,011 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 02:24:38,011 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 02:24:38,012 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 02:24:38,012 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 02:24:38,012 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 02:24:38,012 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 02:24:38,013 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:24:38,013 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 02:24:38,013 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 02:24:38,013 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 02:24:38,014 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 02:24:38,014 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 02:24:38,014 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 02:24:38,014 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 02:24:38,015 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 02:24:38,015 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_bd9721d0-323b-4179-8c76-f3bd702632df/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9721d0-323b-4179-8c76-f3bd702632df/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cc5b9f71a5434758faa1f6f3febe6f12c158e9feff610b938ef9d4658acd21ff [2022-11-22 02:24:38,290 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 02:24:38,366 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 02:24:38,369 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 02:24:38,370 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 02:24:38,374 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 02:24:38,376 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9721d0-323b-4179-8c76-f3bd702632df/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/product-lines/elevator_spec9_product09.cil.c [2022-11-22 02:24:41,392 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 02:24:41,735 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 02:24:41,736 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9721d0-323b-4179-8c76-f3bd702632df/sv-benchmarks/c/product-lines/elevator_spec9_product09.cil.c [2022-11-22 02:24:41,757 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9721d0-323b-4179-8c76-f3bd702632df/bin/utaipan-g80aRyZoba/data/ed36efaa6/37e66e86558445dfacd740c54ff5b7fc/FLAG65db99f01 [2022-11-22 02:24:41,785 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9721d0-323b-4179-8c76-f3bd702632df/bin/utaipan-g80aRyZoba/data/ed36efaa6/37e66e86558445dfacd740c54ff5b7fc [2022-11-22 02:24:41,788 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 02:24:41,789 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 02:24:41,790 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 02:24:41,791 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 02:24:41,798 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 02:24:41,799 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:24:41" (1/1) ... [2022-11-22 02:24:41,801 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b819fdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:24:41, skipping insertion in model container [2022-11-22 02:24:41,801 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:24:41" (1/1) ... [2022-11-22 02:24:41,809 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 02:24:41,871 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 02:24:42,377 WARN L237 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_bd9721d0-323b-4179-8c76-f3bd702632df/sv-benchmarks/c/product-lines/elevator_spec9_product09.cil.c[70349,70362] [2022-11-22 02:24:42,381 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:24:42,393 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 02:24:42,498 WARN L237 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_bd9721d0-323b-4179-8c76-f3bd702632df/sv-benchmarks/c/product-lines/elevator_spec9_product09.cil.c[70349,70362] [2022-11-22 02:24:42,499 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:24:42,527 INFO L208 MainTranslator]: Completed translation [2022-11-22 02:24:42,528 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:24:42 WrapperNode [2022-11-22 02:24:42,528 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 02:24:42,529 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 02:24:42,529 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 02:24:42,529 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 02:24:42,538 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:24:42" (1/1) ... [2022-11-22 02:24:42,562 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:24:42" (1/1) ... [2022-11-22 02:24:42,629 INFO L138 Inliner]: procedures = 89, calls = 327, calls flagged for inlining = 25, calls inlined = 22, statements flattened = 771 [2022-11-22 02:24:42,637 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 02:24:42,646 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 02:24:42,646 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 02:24:42,646 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 02:24:42,656 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:24:42" (1/1) ... [2022-11-22 02:24:42,657 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:24:42" (1/1) ... [2022-11-22 02:24:42,662 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:24:42" (1/1) ... [2022-11-22 02:24:42,671 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:24:42" (1/1) ... [2022-11-22 02:24:42,692 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:24:42" (1/1) ... [2022-11-22 02:24:42,749 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:24:42" (1/1) ... [2022-11-22 02:24:42,753 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:24:42" (1/1) ... [2022-11-22 02:24:42,757 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:24:42" (1/1) ... [2022-11-22 02:24:42,764 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 02:24:42,767 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 02:24:42,770 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 02:24:42,771 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 02:24:42,771 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:24:42" (1/1) ... [2022-11-22 02:24:42,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:24:42,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9721d0-323b-4179-8c76-f3bd702632df/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:24:42,809 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9721d0-323b-4179-8c76-f3bd702632df/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 02:24:42,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9721d0-323b-4179-8c76-f3bd702632df/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 02:24:42,859 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 02:24:42,859 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-11-22 02:24:42,859 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-11-22 02:24:42,860 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-22 02:24:42,860 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-22 02:24:42,860 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-22 02:24:42,860 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-22 02:24:42,860 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-22 02:24:42,860 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-22 02:24:42,860 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-22 02:24:42,861 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-22 02:24:42,861 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-22 02:24:42,861 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-22 02:24:42,861 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-22 02:24:42,861 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-22 02:24:42,861 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-22 02:24:42,861 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-22 02:24:42,861 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-22 02:24:42,862 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-22 02:24:42,862 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-22 02:24:42,862 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-22 02:24:42,862 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-22 02:24:42,863 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-22 02:24:42,863 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-22 02:24:42,863 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-22 02:24:42,864 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-22 02:24:42,864 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-22 02:24:42,864 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-22 02:24:42,865 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-22 02:24:42,865 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-22 02:24:42,865 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-22 02:24:42,865 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2022-11-22 02:24:42,865 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2022-11-22 02:24:42,865 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 02:24:42,866 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-22 02:24:42,866 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-22 02:24:42,866 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-22 02:24:42,867 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-22 02:24:42,867 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-22 02:24:42,867 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-22 02:24:42,867 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 02:24:42,867 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 02:24:42,868 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-22 02:24:42,868 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-22 02:24:43,105 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 02:24:43,107 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 02:24:44,404 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 02:24:45,235 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 02:24:45,235 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-22 02:24:45,240 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:24:45 BoogieIcfgContainer [2022-11-22 02:24:45,240 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 02:24:45,244 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 02:24:45,244 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 02:24:45,248 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 02:24:45,248 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 02:24:41" (1/3) ... [2022-11-22 02:24:45,251 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16003bb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:24:45, skipping insertion in model container [2022-11-22 02:24:45,251 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:24:42" (2/3) ... [2022-11-22 02:24:45,252 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16003bb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:24:45, skipping insertion in model container [2022-11-22 02:24:45,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:24:45" (3/3) ... [2022-11-22 02:24:45,254 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec9_product09.cil.c [2022-11-22 02:24:45,277 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 02:24:45,277 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-22 02:24:45,367 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 02:24:45,374 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=FINITE_AUTOMATA, 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;@70db8025, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 02:24:45,374 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-22 02:24:45,381 INFO L276 IsEmpty]: Start isEmpty. Operand has 332 states, 227 states have (on average 1.6299559471365639) internal successors, (370), 248 states have internal predecessors, (370), 83 states have call successors, (83), 20 states have call predecessors, (83), 20 states have return successors, (83), 77 states have call predecessors, (83), 83 states have call successors, (83) [2022-11-22 02:24:45,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-22 02:24:45,412 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:24:45,412 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] [2022-11-22 02:24:45,413 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:24:45,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:24:45,421 INFO L85 PathProgramCache]: Analyzing trace with hash 751116243, now seen corresponding path program 1 times [2022-11-22 02:24:45,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:24:45,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033798088] [2022-11-22 02:24:45,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:24:45,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:24:45,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:24:45,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:24:45,899 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:24:45,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033798088] [2022-11-22 02:24:45,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033798088] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:24:45,900 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:24:45,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 02:24:45,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869118396] [2022-11-22 02:24:45,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:24:45,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-22 02:24:45,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:24:45,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-22 02:24:45,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-22 02:24:45,941 INFO L87 Difference]: Start difference. First operand has 332 states, 227 states have (on average 1.6299559471365639) internal successors, (370), 248 states have internal predecessors, (370), 83 states have call successors, (83), 20 states have call predecessors, (83), 20 states have return successors, (83), 77 states have call predecessors, (83), 83 states have call successors, (83) Second operand has 2 states, 2 states have (on average 16.0) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2022-11-22 02:24:46,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:24:46,170 INFO L93 Difference]: Finished difference Result 350 states and 563 transitions. [2022-11-22 02:24:46,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-22 02:24:46,173 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 16.0) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) Word has length 51 [2022-11-22 02:24:46,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:24:46,191 INFO L225 Difference]: With dead ends: 350 [2022-11-22 02:24:46,191 INFO L226 Difference]: Without dead ends: 328 [2022-11-22 02:24:46,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-22 02:24:46,199 INFO L413 NwaCegarLoop]: 495 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:24:46,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 495 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:24:46,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-11-22 02:24:46,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 328. [2022-11-22 02:24:46,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 225 states have (on average 1.6177777777777778) internal successors, (364), 244 states have internal predecessors, (364), 83 states have call successors, (83), 20 states have call predecessors, (83), 19 states have return successors, (78), 76 states have call predecessors, (78), 78 states have call successors, (78) [2022-11-22 02:24:46,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 525 transitions. [2022-11-22 02:24:46,277 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 525 transitions. Word has length 51 [2022-11-22 02:24:46,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:24:46,279 INFO L495 AbstractCegarLoop]: Abstraction has 328 states and 525 transitions. [2022-11-22 02:24:46,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 16.0) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2022-11-22 02:24:46,280 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 525 transitions. [2022-11-22 02:24:46,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-22 02:24:46,284 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:24:46,284 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] [2022-11-22 02:24:46,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 02:24:46,285 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:24:46,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:24:46,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1743434788, now seen corresponding path program 1 times [2022-11-22 02:24:46,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:24:46,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223150481] [2022-11-22 02:24:46,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:24:46,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:24:46,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:24:46,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:24:46,943 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:24:46,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223150481] [2022-11-22 02:24:46,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223150481] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:24:46,945 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:24:46,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-22 02:24:46,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036033772] [2022-11-22 02:24:46,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:24:46,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 02:24:46,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:24:46,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 02:24:46,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:24:46,950 INFO L87 Difference]: Start difference. First operand 328 states and 525 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 5 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2022-11-22 02:24:49,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:24:49,579 INFO L93 Difference]: Finished difference Result 1093 states and 1782 transitions. [2022-11-22 02:24:49,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-22 02:24:49,580 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 5 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 52 [2022-11-22 02:24:49,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:24:49,592 INFO L225 Difference]: With dead ends: 1093 [2022-11-22 02:24:49,592 INFO L226 Difference]: Without dead ends: 781 [2022-11-22 02:24:49,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2022-11-22 02:24:49,597 INFO L413 NwaCegarLoop]: 323 mSDtfsCounter, 1578 mSDsluCounter, 1094 mSDsCounter, 0 mSdLazyCounter, 2372 mSolverCounterSat, 482 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1631 SdHoareTripleChecker+Valid, 1417 SdHoareTripleChecker+Invalid, 2854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 482 IncrementalHoareTripleChecker+Valid, 2372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:24:49,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1631 Valid, 1417 Invalid, 2854 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [482 Valid, 2372 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-22 02:24:49,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 781 states. [2022-11-22 02:24:49,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 781 to 743. [2022-11-22 02:24:49,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 530 states have (on average 1.6471698113207547) internal successors, (873), 565 states have internal predecessors, (873), 171 states have call successors, (171), 39 states have call predecessors, (171), 41 states have return successors, (172), 163 states have call predecessors, (172), 166 states have call successors, (172) [2022-11-22 02:24:49,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 1216 transitions. [2022-11-22 02:24:49,706 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 1216 transitions. Word has length 52 [2022-11-22 02:24:49,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:24:49,706 INFO L495 AbstractCegarLoop]: Abstraction has 743 states and 1216 transitions. [2022-11-22 02:24:49,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 5 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2022-11-22 02:24:49,707 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 1216 transitions. [2022-11-22 02:24:49,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-22 02:24:49,710 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:24:49,710 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:24:49,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-22 02:24:49,710 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:24:49,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:24:49,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1616890586, now seen corresponding path program 1 times [2022-11-22 02:24:49,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:24:49,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742014035] [2022-11-22 02:24:49,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:24:49,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:24:49,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:24:50,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:24:50,090 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:24:50,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742014035] [2022-11-22 02:24:50,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742014035] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:24:50,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:24:50,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 02:24:50,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747104147] [2022-11-22 02:24:50,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:24:50,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:24:50,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:24:50,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:24:50,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:24:50,096 INFO L87 Difference]: Start difference. First operand 743 states and 1216 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-22 02:24:50,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:24:50,362 INFO L93 Difference]: Finished difference Result 1231 states and 2018 transitions. [2022-11-22 02:24:50,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:24:50,365 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 56 [2022-11-22 02:24:50,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:24:50,373 INFO L225 Difference]: With dead ends: 1231 [2022-11-22 02:24:50,373 INFO L226 Difference]: Without dead ends: 791 [2022-11-22 02:24:50,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:24:50,384 INFO L413 NwaCegarLoop]: 515 mSDtfsCounter, 30 mSDsluCounter, 1490 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 2005 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:24:50,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 2005 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:24:50,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2022-11-22 02:24:50,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 755. [2022-11-22 02:24:50,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 539 states have (on average 1.6363636363636365) internal successors, (882), 574 states have internal predecessors, (882), 171 states have call successors, (171), 39 states have call predecessors, (171), 44 states have return successors, (178), 166 states have call predecessors, (178), 166 states have call successors, (178) [2022-11-22 02:24:50,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 1231 transitions. [2022-11-22 02:24:50,478 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 1231 transitions. Word has length 56 [2022-11-22 02:24:50,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:24:50,481 INFO L495 AbstractCegarLoop]: Abstraction has 755 states and 1231 transitions. [2022-11-22 02:24:50,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-22 02:24:50,481 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 1231 transitions. [2022-11-22 02:24:50,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-22 02:24:50,485 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:24:50,486 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:24:50,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-22 02:24:50,486 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:24:50,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:24:50,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1771186690, now seen corresponding path program 1 times [2022-11-22 02:24:50,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:24:50,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154407691] [2022-11-22 02:24:50,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:24:50,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:24:50,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:24:50,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:24:50,905 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:24:50,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154407691] [2022-11-22 02:24:50,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154407691] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:24:50,906 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:24:50,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-22 02:24:50,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449840285] [2022-11-22 02:24:50,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:24:50,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-22 02:24:50,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:24:50,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-22 02:24:50,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-22 02:24:50,908 INFO L87 Difference]: Start difference. First operand 755 states and 1231 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 7 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2022-11-22 02:24:53,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:24:53,384 INFO L93 Difference]: Finished difference Result 1689 states and 2743 transitions. [2022-11-22 02:24:53,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-22 02:24:53,385 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 7 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) Word has length 60 [2022-11-22 02:24:53,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:24:53,402 INFO L225 Difference]: With dead ends: 1689 [2022-11-22 02:24:53,403 INFO L226 Difference]: Without dead ends: 1141 [2022-11-22 02:24:53,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-22 02:24:53,406 INFO L413 NwaCegarLoop]: 423 mSDtfsCounter, 2341 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 1952 mSolverCounterSat, 973 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2469 SdHoareTripleChecker+Valid, 960 SdHoareTripleChecker+Invalid, 2925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 973 IncrementalHoareTripleChecker+Valid, 1952 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:24:53,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2469 Valid, 960 Invalid, 2925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [973 Valid, 1952 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-22 02:24:53,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1141 states. [2022-11-22 02:24:53,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1141 to 1069. [2022-11-22 02:24:53,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1069 states, 752 states have (on average 1.5890957446808511) internal successors, (1195), 804 states have internal predecessors, (1195), 246 states have call successors, (246), 62 states have call predecessors, (246), 70 states have return successors, (262), 239 states have call predecessors, (262), 241 states have call successors, (262) [2022-11-22 02:24:53,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1069 states to 1069 states and 1703 transitions. [2022-11-22 02:24:53,484 INFO L78 Accepts]: Start accepts. Automaton has 1069 states and 1703 transitions. Word has length 60 [2022-11-22 02:24:53,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:24:53,484 INFO L495 AbstractCegarLoop]: Abstraction has 1069 states and 1703 transitions. [2022-11-22 02:24:53,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 7 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2022-11-22 02:24:53,485 INFO L276 IsEmpty]: Start isEmpty. Operand 1069 states and 1703 transitions. [2022-11-22 02:24:53,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-22 02:24:53,486 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:24:53,487 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:24:53,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-22 02:24:53,487 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:24:53,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:24:53,488 INFO L85 PathProgramCache]: Analyzing trace with hash -2013170515, now seen corresponding path program 1 times [2022-11-22 02:24:53,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:24:53,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687025596] [2022-11-22 02:24:53,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:24:53,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:24:53,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:24:53,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:24:53,620 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:24:53,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687025596] [2022-11-22 02:24:53,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687025596] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:24:53,620 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:24:53,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 02:24:53,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754855047] [2022-11-22 02:24:53,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:24:53,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:24:53,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:24:53,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:24:53,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:24:53,622 INFO L87 Difference]: Start difference. First operand 1069 states and 1703 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-22 02:24:53,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:24:53,885 INFO L93 Difference]: Finished difference Result 2075 states and 3361 transitions. [2022-11-22 02:24:53,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 02:24:53,886 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 63 [2022-11-22 02:24:53,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:24:53,894 INFO L225 Difference]: With dead ends: 2075 [2022-11-22 02:24:53,894 INFO L226 Difference]: Without dead ends: 1069 [2022-11-22 02:24:53,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:24:53,900 INFO L413 NwaCegarLoop]: 518 mSDtfsCounter, 210 mSDsluCounter, 808 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 1326 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:24:53,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 1326 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:24:53,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1069 states. [2022-11-22 02:24:53,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1069 to 1069. [2022-11-22 02:24:53,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1069 states, 752 states have (on average 1.5465425531914894) internal successors, (1163), 804 states have internal predecessors, (1163), 246 states have call successors, (246), 62 states have call predecessors, (246), 70 states have return successors, (262), 239 states have call predecessors, (262), 241 states have call successors, (262) [2022-11-22 02:24:54,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1069 states to 1069 states and 1671 transitions. [2022-11-22 02:24:54,001 INFO L78 Accepts]: Start accepts. Automaton has 1069 states and 1671 transitions. Word has length 63 [2022-11-22 02:24:54,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:24:54,002 INFO L495 AbstractCegarLoop]: Abstraction has 1069 states and 1671 transitions. [2022-11-22 02:24:54,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-22 02:24:54,002 INFO L276 IsEmpty]: Start isEmpty. Operand 1069 states and 1671 transitions. [2022-11-22 02:24:54,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-22 02:24:54,006 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:24:54,006 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-22 02:24:54,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-22 02:24:54,007 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:24:54,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:24:54,007 INFO L85 PathProgramCache]: Analyzing trace with hash 21526359, now seen corresponding path program 1 times [2022-11-22 02:24:54,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:24:54,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076503748] [2022-11-22 02:24:54,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:24:54,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:24:54,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:24:54,361 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 02:24:54,361 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:24:54,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076503748] [2022-11-22 02:24:54,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076503748] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:24:54,362 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:24:54,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-22 02:24:54,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984554549] [2022-11-22 02:24:54,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:24:54,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 02:24:54,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:24:54,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 02:24:54,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:24:54,364 INFO L87 Difference]: Start difference. First operand 1069 states and 1671 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 5 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-22 02:24:56,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:24:56,517 INFO L93 Difference]: Finished difference Result 2007 states and 3144 transitions. [2022-11-22 02:24:56,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-22 02:24:56,518 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 5 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 65 [2022-11-22 02:24:56,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:24:56,529 INFO L225 Difference]: With dead ends: 2007 [2022-11-22 02:24:56,529 INFO L226 Difference]: Without dead ends: 1202 [2022-11-22 02:24:56,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-22 02:24:56,536 INFO L413 NwaCegarLoop]: 300 mSDtfsCounter, 869 mSDsluCounter, 976 mSDsCounter, 0 mSdLazyCounter, 2165 mSolverCounterSat, 346 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 929 SdHoareTripleChecker+Valid, 1276 SdHoareTripleChecker+Invalid, 2511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 346 IncrementalHoareTripleChecker+Valid, 2165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-22 02:24:56,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [929 Valid, 1276 Invalid, 2511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [346 Valid, 2165 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-22 02:24:56,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1202 states. [2022-11-22 02:24:56,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1202 to 1096. [2022-11-22 02:24:56,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1096 states, 770 states have (on average 1.5389610389610389) internal successors, (1185), 826 states have internal predecessors, (1185), 247 states have call successors, (247), 67 states have call predecessors, (247), 78 states have return successors, (273), 239 states have call predecessors, (273), 242 states have call successors, (273) [2022-11-22 02:24:56,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1096 states to 1096 states and 1705 transitions. [2022-11-22 02:24:56,627 INFO L78 Accepts]: Start accepts. Automaton has 1096 states and 1705 transitions. Word has length 65 [2022-11-22 02:24:56,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:24:56,629 INFO L495 AbstractCegarLoop]: Abstraction has 1096 states and 1705 transitions. [2022-11-22 02:24:56,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 5 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-22 02:24:56,630 INFO L276 IsEmpty]: Start isEmpty. Operand 1096 states and 1705 transitions. [2022-11-22 02:24:56,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-22 02:24:56,632 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:24:56,633 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:24:56,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-22 02:24:56,633 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:24:56,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:24:56,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1043832779, now seen corresponding path program 1 times [2022-11-22 02:24:56,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:24:56,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005919722] [2022-11-22 02:24:56,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:24:56,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:24:56,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:24:56,974 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 02:24:56,975 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:24:56,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005919722] [2022-11-22 02:24:56,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005919722] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:24:56,975 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:24:56,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-22 02:24:56,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754735806] [2022-11-22 02:24:56,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:24:56,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 02:24:56,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:24:56,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 02:24:56,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:24:56,979 INFO L87 Difference]: Start difference. First operand 1096 states and 1705 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-22 02:24:57,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:24:57,555 INFO L93 Difference]: Finished difference Result 1168 states and 1818 transitions. [2022-11-22 02:24:57,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:24:57,556 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) Word has length 69 [2022-11-22 02:24:57,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:24:57,567 INFO L225 Difference]: With dead ends: 1168 [2022-11-22 02:24:57,567 INFO L226 Difference]: Without dead ends: 1153 [2022-11-22 02:24:57,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-22 02:24:57,572 INFO L413 NwaCegarLoop]: 481 mSDtfsCounter, 609 mSDsluCounter, 798 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 610 SdHoareTripleChecker+Valid, 1279 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 02:24:57,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [610 Valid, 1279 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 02:24:57,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1153 states. [2022-11-22 02:24:57,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1153 to 1100. [2022-11-22 02:24:57,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1100 states, 774 states have (on average 1.5361757105943152) internal successors, (1189), 830 states have internal predecessors, (1189), 247 states have call successors, (247), 67 states have call predecessors, (247), 78 states have return successors, (273), 239 states have call predecessors, (273), 242 states have call successors, (273) [2022-11-22 02:24:57,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1100 states to 1100 states and 1709 transitions. [2022-11-22 02:24:57,682 INFO L78 Accepts]: Start accepts. Automaton has 1100 states and 1709 transitions. Word has length 69 [2022-11-22 02:24:57,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:24:57,683 INFO L495 AbstractCegarLoop]: Abstraction has 1100 states and 1709 transitions. [2022-11-22 02:24:57,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-22 02:24:57,684 INFO L276 IsEmpty]: Start isEmpty. Operand 1100 states and 1709 transitions. [2022-11-22 02:24:57,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-22 02:24:57,685 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:24:57,686 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-22 02:24:57,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-22 02:24:57,686 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:24:57,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:24:57,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1258937169, now seen corresponding path program 1 times [2022-11-22 02:24:57,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:24:57,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481764509] [2022-11-22 02:24:57,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:24:57,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:24:57,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:24:58,004 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 02:24:58,004 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:24:58,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481764509] [2022-11-22 02:24:58,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481764509] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:24:58,005 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:24:58,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-22 02:24:58,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047335631] [2022-11-22 02:24:58,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:24:58,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 02:24:58,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:24:58,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 02:24:58,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:24:58,007 INFO L87 Difference]: Start difference. First operand 1100 states and 1709 transitions. Second operand has 7 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 4 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-22 02:24:58,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:24:58,337 INFO L93 Difference]: Finished difference Result 1119 states and 1733 transitions. [2022-11-22 02:24:58,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-22 02:24:58,338 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 4 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) Word has length 74 [2022-11-22 02:24:58,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:24:58,345 INFO L225 Difference]: With dead ends: 1119 [2022-11-22 02:24:58,345 INFO L226 Difference]: Without dead ends: 1104 [2022-11-22 02:24:58,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-22 02:24:58,350 INFO L413 NwaCegarLoop]: 471 mSDtfsCounter, 257 mSDsluCounter, 2079 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 2550 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:24:58,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 2550 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:24:58,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1104 states. [2022-11-22 02:24:58,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1104 to 1100. [2022-11-22 02:24:58,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1100 states, 774 states have (on average 1.5322997416020672) internal successors, (1186), 830 states have internal predecessors, (1186), 247 states have call successors, (247), 67 states have call predecessors, (247), 78 states have return successors, (273), 239 states have call predecessors, (273), 242 states have call successors, (273) [2022-11-22 02:24:58,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1100 states to 1100 states and 1706 transitions. [2022-11-22 02:24:58,450 INFO L78 Accepts]: Start accepts. Automaton has 1100 states and 1706 transitions. Word has length 74 [2022-11-22 02:24:58,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:24:58,450 INFO L495 AbstractCegarLoop]: Abstraction has 1100 states and 1706 transitions. [2022-11-22 02:24:58,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 4 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-22 02:24:58,451 INFO L276 IsEmpty]: Start isEmpty. Operand 1100 states and 1706 transitions. [2022-11-22 02:24:58,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-22 02:24:58,459 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:24:58,459 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-22 02:24:58,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-22 02:24:58,459 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:24:58,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:24:58,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1953235180, now seen corresponding path program 1 times [2022-11-22 02:24:58,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:24:58,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353279333] [2022-11-22 02:24:58,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:24:58,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:24:58,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:24:58,589 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-22 02:24:58,590 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:24:58,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353279333] [2022-11-22 02:24:58,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353279333] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:24:58,591 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:24:58,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:24:58,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740240061] [2022-11-22 02:24:58,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:24:58,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:24:58,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:24:58,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:24:58,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:24:58,593 INFO L87 Difference]: Start difference. First operand 1100 states and 1706 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-22 02:24:58,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:24:58,889 INFO L93 Difference]: Finished difference Result 3229 states and 5050 transitions. [2022-11-22 02:24:58,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:24:58,890 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 81 [2022-11-22 02:24:58,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:24:58,905 INFO L225 Difference]: With dead ends: 3229 [2022-11-22 02:24:58,905 INFO L226 Difference]: Without dead ends: 2145 [2022-11-22 02:24:58,911 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 [2022-11-22 02:24:58,913 INFO L413 NwaCegarLoop]: 588 mSDtfsCounter, 473 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 473 SdHoareTripleChecker+Valid, 1049 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:24:58,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [473 Valid, 1049 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:24:58,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2145 states. [2022-11-22 02:24:59,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2145 to 2104. [2022-11-22 02:24:59,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2104 states, 1508 states have (on average 1.539787798408488) internal successors, (2322), 1616 states have internal predecessors, (2322), 448 states have call successors, (448), 123 states have call predecessors, (448), 147 states have return successors, (517), 420 states have call predecessors, (517), 443 states have call successors, (517) [2022-11-22 02:24:59,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2104 states to 2104 states and 3287 transitions. [2022-11-22 02:24:59,086 INFO L78 Accepts]: Start accepts. Automaton has 2104 states and 3287 transitions. Word has length 81 [2022-11-22 02:24:59,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:24:59,086 INFO L495 AbstractCegarLoop]: Abstraction has 2104 states and 3287 transitions. [2022-11-22 02:24:59,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-22 02:24:59,087 INFO L276 IsEmpty]: Start isEmpty. Operand 2104 states and 3287 transitions. [2022-11-22 02:24:59,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-22 02:24:59,089 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:24:59,089 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-22 02:24:59,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-22 02:24:59,090 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:24:59,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:24:59,091 INFO L85 PathProgramCache]: Analyzing trace with hash -421157521, now seen corresponding path program 1 times [2022-11-22 02:24:59,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:24:59,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340347154] [2022-11-22 02:24:59,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:24:59,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:24:59,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:24:59,201 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-22 02:24:59,201 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:24:59,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340347154] [2022-11-22 02:24:59,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340347154] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:24:59,202 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:24:59,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:24:59,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520519629] [2022-11-22 02:24:59,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:24:59,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:24:59,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:24:59,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:24:59,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:24:59,204 INFO L87 Difference]: Start difference. First operand 2104 states and 3287 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-22 02:24:59,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:24:59,638 INFO L93 Difference]: Finished difference Result 6240 states and 9836 transitions. [2022-11-22 02:24:59,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:24:59,639 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 82 [2022-11-22 02:24:59,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:24:59,672 INFO L225 Difference]: With dead ends: 6240 [2022-11-22 02:24:59,673 INFO L226 Difference]: Without dead ends: 4155 [2022-11-22 02:24:59,685 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 [2022-11-22 02:24:59,686 INFO L413 NwaCegarLoop]: 591 mSDtfsCounter, 472 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 1055 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:24:59,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [472 Valid, 1055 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:24:59,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4155 states. [2022-11-22 02:25:00,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4155 to 4113. [2022-11-22 02:25:00,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4113 states, 2977 states have (on average 1.5418206247900572) internal successors, (4590), 3189 states have internal predecessors, (4590), 850 states have call successors, (850), 235 states have call predecessors, (850), 285 states have return successors, (1033), 782 states have call predecessors, (1033), 845 states have call successors, (1033) [2022-11-22 02:25:00,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4113 states to 4113 states and 6473 transitions. [2022-11-22 02:25:00,062 INFO L78 Accepts]: Start accepts. Automaton has 4113 states and 6473 transitions. Word has length 82 [2022-11-22 02:25:00,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:25:00,063 INFO L495 AbstractCegarLoop]: Abstraction has 4113 states and 6473 transitions. [2022-11-22 02:25:00,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-22 02:25:00,064 INFO L276 IsEmpty]: Start isEmpty. Operand 4113 states and 6473 transitions. [2022-11-22 02:25:00,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-22 02:25:00,066 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:25:00,067 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-22 02:25:00,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-22 02:25:00,067 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:25:00,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:25:00,068 INFO L85 PathProgramCache]: Analyzing trace with hash -171386442, now seen corresponding path program 1 times [2022-11-22 02:25:00,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:25:00,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649687596] [2022-11-22 02:25:00,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:25:00,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:25:00,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:25:00,184 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-22 02:25:00,185 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:25:00,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649687596] [2022-11-22 02:25:00,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649687596] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:25:00,185 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:25:00,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:25:00,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602349761] [2022-11-22 02:25:00,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:25:00,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:25:00,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:25:00,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:25:00,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:25:00,187 INFO L87 Difference]: Start difference. First operand 4113 states and 6473 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-22 02:25:00,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:25:00,850 INFO L93 Difference]: Finished difference Result 12263 states and 19539 transitions. [2022-11-22 02:25:00,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:25:00,851 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 83 [2022-11-22 02:25:00,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:25:00,903 INFO L225 Difference]: With dead ends: 12263 [2022-11-22 02:25:00,903 INFO L226 Difference]: Without dead ends: 8175 [2022-11-22 02:25:00,922 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 [2022-11-22 02:25:00,923 INFO L413 NwaCegarLoop]: 594 mSDtfsCounter, 471 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 1061 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:25:00,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [471 Valid, 1061 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:25:00,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8175 states. [2022-11-22 02:25:01,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8175 to 8132. [2022-11-22 02:25:01,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8132 states, 5916 states have (on average 1.5409060175794456) internal successors, (9116), 6336 states have internal predecessors, (9116), 1654 states have call successors, (1654), 459 states have call predecessors, (1654), 561 states have return successors, (2167), 1506 states have call predecessors, (2167), 1649 states have call successors, (2167) [2022-11-22 02:25:01,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8132 states to 8132 states and 12937 transitions. [2022-11-22 02:25:01,719 INFO L78 Accepts]: Start accepts. Automaton has 8132 states and 12937 transitions. Word has length 83 [2022-11-22 02:25:01,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:25:01,720 INFO L495 AbstractCegarLoop]: Abstraction has 8132 states and 12937 transitions. [2022-11-22 02:25:01,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-22 02:25:01,721 INFO L276 IsEmpty]: Start isEmpty. Operand 8132 states and 12937 transitions. [2022-11-22 02:25:01,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-22 02:25:01,724 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:25:01,724 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-22 02:25:01,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-22 02:25:01,724 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:25:01,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:25:01,725 INFO L85 PathProgramCache]: Analyzing trace with hash -694527213, now seen corresponding path program 1 times [2022-11-22 02:25:01,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:25:01,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938982036] [2022-11-22 02:25:01,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:25:01,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:25:01,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:25:01,868 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-22 02:25:01,869 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:25:01,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938982036] [2022-11-22 02:25:01,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938982036] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:25:01,869 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:25:01,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:25:01,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100037215] [2022-11-22 02:25:01,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:25:01,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:25:01,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:25:01,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:25:01,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:25:01,871 INFO L87 Difference]: Start difference. First operand 8132 states and 12937 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-22 02:25:03,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:25:03,098 INFO L93 Difference]: Finished difference Result 24310 states and 39440 transitions. [2022-11-22 02:25:03,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:25:03,099 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 87 [2022-11-22 02:25:03,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:25:03,204 INFO L225 Difference]: With dead ends: 24310 [2022-11-22 02:25:03,205 INFO L226 Difference]: Without dead ends: 16215 [2022-11-22 02:25:03,242 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 [2022-11-22 02:25:03,243 INFO L413 NwaCegarLoop]: 597 mSDtfsCounter, 470 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 1067 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:25:03,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [470 Valid, 1067 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:25:03,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16215 states. [2022-11-22 02:25:04,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16215 to 16171. [2022-11-22 02:25:04,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16171 states, 11795 states have (on average 1.538448495125053) internal successors, (18146), 12631 states have internal predecessors, (18146), 3262 states have call successors, (3262), 907 states have call predecessors, (3262), 1113 states have return successors, (4813), 2954 states have call predecessors, (4813), 3257 states have call successors, (4813) [2022-11-22 02:25:04,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16171 states to 16171 states and 26221 transitions. [2022-11-22 02:25:04,911 INFO L78 Accepts]: Start accepts. Automaton has 16171 states and 26221 transitions. Word has length 87 [2022-11-22 02:25:04,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:25:04,912 INFO L495 AbstractCegarLoop]: Abstraction has 16171 states and 26221 transitions. [2022-11-22 02:25:04,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-22 02:25:04,912 INFO L276 IsEmpty]: Start isEmpty. Operand 16171 states and 26221 transitions. [2022-11-22 02:25:04,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-11-22 02:25:04,915 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:25:04,915 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-22 02:25:04,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-22 02:25:04,915 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:25:04,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:25:04,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1506450344, now seen corresponding path program 1 times [2022-11-22 02:25:04,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:25:04,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794451404] [2022-11-22 02:25:04,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:25:04,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:25:04,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:25:05,018 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-22 02:25:05,018 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:25:05,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794451404] [2022-11-22 02:25:05,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794451404] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:25:05,018 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:25:05,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:25:05,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256739255] [2022-11-22 02:25:05,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:25:05,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:25:05,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:25:05,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:25:05,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:25:05,021 INFO L87 Difference]: Start difference. First operand 16171 states and 26221 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-22 02:25:06,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:25:06,095 INFO L93 Difference]: Finished difference Result 17221 states and 28012 transitions. [2022-11-22 02:25:06,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:25:06,096 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 85 [2022-11-22 02:25:06,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:25:06,220 INFO L225 Difference]: With dead ends: 17221 [2022-11-22 02:25:06,220 INFO L226 Difference]: Without dead ends: 17210 [2022-11-22 02:25:06,233 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 [2022-11-22 02:25:06,234 INFO L413 NwaCegarLoop]: 590 mSDtfsCounter, 456 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 456 SdHoareTripleChecker+Valid, 1065 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:25:06,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [456 Valid, 1065 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:25:06,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17210 states. [2022-11-22 02:25:07,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17210 to 17167. [2022-11-22 02:25:07,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17167 states, 12522 states have (on average 1.537374221370388) internal successors, (19251), 13410 states have internal predecessors, (19251), 3463 states have call successors, (3463), 963 states have call predecessors, (3463), 1181 states have return successors, (5221), 3134 states have call predecessors, (5221), 3458 states have call successors, (5221) [2022-11-22 02:25:07,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17167 states to 17167 states and 27935 transitions. [2022-11-22 02:25:07,940 INFO L78 Accepts]: Start accepts. Automaton has 17167 states and 27935 transitions. Word has length 85 [2022-11-22 02:25:07,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:25:07,941 INFO L495 AbstractCegarLoop]: Abstraction has 17167 states and 27935 transitions. [2022-11-22 02:25:07,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-22 02:25:07,941 INFO L276 IsEmpty]: Start isEmpty. Operand 17167 states and 27935 transitions. [2022-11-22 02:25:07,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-11-22 02:25:07,949 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:25:07,949 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 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] [2022-11-22 02:25:07,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-22 02:25:07,950 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:25:07,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:25:07,951 INFO L85 PathProgramCache]: Analyzing trace with hash -252878320, now seen corresponding path program 1 times [2022-11-22 02:25:07,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:25:07,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181982673] [2022-11-22 02:25:07,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:25:07,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:25:08,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:25:08,193 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-11-22 02:25:08,193 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:25:08,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181982673] [2022-11-22 02:25:08,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181982673] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:25:08,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338173756] [2022-11-22 02:25:08,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:25:08,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:25:08,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9721d0-323b-4179-8c76-f3bd702632df/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:25:08,202 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9721d0-323b-4179-8c76-f3bd702632df/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:25:08,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9721d0-323b-4179-8c76-f3bd702632df/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 02:25:08,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:25:08,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 1790 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 02:25:08,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:25:08,775 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-22 02:25:08,776 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:25:08,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338173756] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:25:08,777 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:25:08,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-22 02:25:08,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299162728] [2022-11-22 02:25:08,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:25:08,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:25:08,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:25:08,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:25:08,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:25:08,779 INFO L87 Difference]: Start difference. First operand 17167 states and 27935 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-22 02:25:10,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:25:10,700 INFO L93 Difference]: Finished difference Result 36306 states and 60697 transitions. [2022-11-22 02:25:10,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:25:10,700 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 128 [2022-11-22 02:25:10,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:25:10,822 INFO L225 Difference]: With dead ends: 36306 [2022-11-22 02:25:10,822 INFO L226 Difference]: Without dead ends: 19156 [2022-11-22 02:25:10,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:25:10,902 INFO L413 NwaCegarLoop]: 415 mSDtfsCounter, 213 mSDsluCounter, 806 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1221 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:25:10,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1221 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 02:25:10,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19156 states. [2022-11-22 02:25:12,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19156 to 19156. [2022-11-22 02:25:12,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19156 states, 14460 states have (on average 1.5887966804979252) internal successors, (22974), 15348 states have internal predecessors, (22974), 3463 states have call successors, (3463), 1014 states have call predecessors, (3463), 1232 states have return successors, (5221), 3134 states have call predecessors, (5221), 3458 states have call successors, (5221) [2022-11-22 02:25:12,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19156 states to 19156 states and 31658 transitions. [2022-11-22 02:25:12,223 INFO L78 Accepts]: Start accepts. Automaton has 19156 states and 31658 transitions. Word has length 128 [2022-11-22 02:25:12,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:25:12,224 INFO L495 AbstractCegarLoop]: Abstraction has 19156 states and 31658 transitions. [2022-11-22 02:25:12,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-22 02:25:12,224 INFO L276 IsEmpty]: Start isEmpty. Operand 19156 states and 31658 transitions. [2022-11-22 02:25:12,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-11-22 02:25:12,232 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:25:12,232 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 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] [2022-11-22 02:25:12,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9721d0-323b-4179-8c76-f3bd702632df/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-22 02:25:12,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9721d0-323b-4179-8c76-f3bd702632df/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-22 02:25:12,443 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:25:12,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:25:12,444 INFO L85 PathProgramCache]: Analyzing trace with hash 289323624, now seen corresponding path program 1 times [2022-11-22 02:25:12,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:25:12,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389461855] [2022-11-22 02:25:12,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:25:12,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:25:12,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:25:14,352 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-22 02:25:14,352 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:25:14,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389461855] [2022-11-22 02:25:14,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389461855] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:25:14,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010818035] [2022-11-22 02:25:14,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:25:14,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:25:14,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9721d0-323b-4179-8c76-f3bd702632df/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:25:14,355 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9721d0-323b-4179-8c76-f3bd702632df/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:25:14,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9721d0-323b-4179-8c76-f3bd702632df/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 02:25:14,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:25:14,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 1795 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 02:25:14,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:25:14,880 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-22 02:25:14,880 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:25:14,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010818035] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:25:14,881 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:25:14,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [18] total 20 [2022-11-22 02:25:14,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707683592] [2022-11-22 02:25:14,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:25:14,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:25:14,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:25:14,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:25:14,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-11-22 02:25:14,886 INFO L87 Difference]: Start difference. First operand 19156 states and 31658 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-22 02:25:16,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:25:16,395 INFO L93 Difference]: Finished difference Result 40284 states and 68092 transitions. [2022-11-22 02:25:16,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:25:16,395 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 133 [2022-11-22 02:25:16,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:25:16,518 INFO L225 Difference]: With dead ends: 40284 [2022-11-22 02:25:16,519 INFO L226 Difference]: Without dead ends: 21145 [2022-11-22 02:25:16,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-11-22 02:25:16,589 INFO L413 NwaCegarLoop]: 415 mSDtfsCounter, 211 mSDsluCounter, 806 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1221 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:25:16,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1221 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 02:25:16,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21145 states. [2022-11-22 02:25:17,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21145 to 21145. [2022-11-22 02:25:17,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21145 states, 16398 states have (on average 1.6280643980973288) internal successors, (26697), 17286 states have internal predecessors, (26697), 3463 states have call successors, (3463), 1065 states have call predecessors, (3463), 1283 states have return successors, (5221), 3134 states have call predecessors, (5221), 3458 states have call successors, (5221) [2022-11-22 02:25:18,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21145 states to 21145 states and 35381 transitions. [2022-11-22 02:25:18,012 INFO L78 Accepts]: Start accepts. Automaton has 21145 states and 35381 transitions. Word has length 133 [2022-11-22 02:25:18,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:25:18,012 INFO L495 AbstractCegarLoop]: Abstraction has 21145 states and 35381 transitions. [2022-11-22 02:25:18,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-22 02:25:18,013 INFO L276 IsEmpty]: Start isEmpty. Operand 21145 states and 35381 transitions. [2022-11-22 02:25:18,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-22 02:25:18,019 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:25:18,020 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 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] [2022-11-22 02:25:18,032 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9721d0-323b-4179-8c76-f3bd702632df/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-22 02:25:18,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9721d0-323b-4179-8c76-f3bd702632df/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-22 02:25:18,228 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:25:18,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:25:18,230 INFO L85 PathProgramCache]: Analyzing trace with hash -774046536, now seen corresponding path program 1 times [2022-11-22 02:25:18,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:25:18,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455223053] [2022-11-22 02:25:18,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:25:18,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:25:18,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:25:19,642 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-22 02:25:19,642 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:25:19,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455223053] [2022-11-22 02:25:19,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455223053] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:25:19,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228361150] [2022-11-22 02:25:19,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:25:19,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:25:19,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9721d0-323b-4179-8c76-f3bd702632df/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:25:19,644 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9721d0-323b-4179-8c76-f3bd702632df/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:25:19,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9721d0-323b-4179-8c76-f3bd702632df/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 02:25:20,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:25:20,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 1799 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 02:25:20,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:25:20,182 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-22 02:25:20,182 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:25:20,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228361150] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:25:20,183 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:25:20,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [18] total 20 [2022-11-22 02:25:20,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582359760] [2022-11-22 02:25:20,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:25:20,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:25:20,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:25:20,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:25:20,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-11-22 02:25:20,186 INFO L87 Difference]: Start difference. First operand 21145 states and 35381 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-22 02:25:21,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:25:21,660 INFO L93 Difference]: Finished difference Result 44262 states and 75487 transitions. [2022-11-22 02:25:21,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:25:21,661 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 137 [2022-11-22 02:25:21,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:25:21,860 INFO L225 Difference]: With dead ends: 44262 [2022-11-22 02:25:21,860 INFO L226 Difference]: Without dead ends: 23134 [2022-11-22 02:25:21,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-11-22 02:25:21,901 INFO L413 NwaCegarLoop]: 415 mSDtfsCounter, 209 mSDsluCounter, 806 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1221 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:25:21,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1221 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 02:25:21,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23134 states. [2022-11-22 02:25:23,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23134 to 23134. [2022-11-22 02:25:23,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23134 states, 18336 states have (on average 1.6590314136125655) internal successors, (30420), 19224 states have internal predecessors, (30420), 3463 states have call successors, (3463), 1116 states have call predecessors, (3463), 1334 states have return successors, (5221), 3134 states have call predecessors, (5221), 3458 states have call successors, (5221) [2022-11-22 02:25:23,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23134 states to 23134 states and 39104 transitions. [2022-11-22 02:25:23,563 INFO L78 Accepts]: Start accepts. Automaton has 23134 states and 39104 transitions. Word has length 137 [2022-11-22 02:25:23,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:25:23,564 INFO L495 AbstractCegarLoop]: Abstraction has 23134 states and 39104 transitions. [2022-11-22 02:25:23,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-22 02:25:23,565 INFO L276 IsEmpty]: Start isEmpty. Operand 23134 states and 39104 transitions. [2022-11-22 02:25:23,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-11-22 02:25:23,573 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:25:23,573 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 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] [2022-11-22 02:25:23,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9721d0-323b-4179-8c76-f3bd702632df/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-22 02:25:23,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9721d0-323b-4179-8c76-f3bd702632df/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:25:23,782 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:25:23,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:25:23,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1550730406, now seen corresponding path program 1 times [2022-11-22 02:25:23,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:25:23,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928678904] [2022-11-22 02:25:23,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:25:23,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:25:23,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:25:25,240 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-22 02:25:25,240 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:25:25,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928678904] [2022-11-22 02:25:25,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928678904] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:25:25,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181697923] [2022-11-22 02:25:25,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:25:25,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:25:25,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9721d0-323b-4179-8c76-f3bd702632df/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:25:25,242 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9721d0-323b-4179-8c76-f3bd702632df/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:25:25,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9721d0-323b-4179-8c76-f3bd702632df/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-22 02:25:25,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:25:25,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 1802 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 02:25:25,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:25:25,851 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-22 02:25:25,851 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:25:25,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181697923] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:25:25,852 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:25:25,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [18] total 20 [2022-11-22 02:25:25,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635606713] [2022-11-22 02:25:25,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:25:25,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:25:25,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:25:25,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:25:25,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-11-22 02:25:25,855 INFO L87 Difference]: Start difference. First operand 23134 states and 39104 transitions. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-22 02:25:27,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:25:27,303 INFO L93 Difference]: Finished difference Result 48240 states and 82882 transitions. [2022-11-22 02:25:27,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:25:27,304 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 140 [2022-11-22 02:25:27,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:25:27,380 INFO L225 Difference]: With dead ends: 48240 [2022-11-22 02:25:27,380 INFO L226 Difference]: Without dead ends: 25123 [2022-11-22 02:25:27,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-11-22 02:25:27,421 INFO L413 NwaCegarLoop]: 415 mSDtfsCounter, 207 mSDsluCounter, 806 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1221 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:25:27,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1221 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 02:25:27,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25123 states. [2022-11-22 02:25:28,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25123 to 25123. [2022-11-22 02:25:28,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25123 states, 20274 states have (on average 1.6840781296241492) internal successors, (34143), 21162 states have internal predecessors, (34143), 3463 states have call successors, (3463), 1167 states have call predecessors, (3463), 1385 states have return successors, (5221), 3134 states have call predecessors, (5221), 3458 states have call successors, (5221) [2022-11-22 02:25:28,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25123 states to 25123 states and 42827 transitions. [2022-11-22 02:25:28,826 INFO L78 Accepts]: Start accepts. Automaton has 25123 states and 42827 transitions. Word has length 140 [2022-11-22 02:25:28,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:25:28,827 INFO L495 AbstractCegarLoop]: Abstraction has 25123 states and 42827 transitions. [2022-11-22 02:25:28,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-22 02:25:28,827 INFO L276 IsEmpty]: Start isEmpty. Operand 25123 states and 42827 transitions. [2022-11-22 02:25:28,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-11-22 02:25:28,836 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:25:28,836 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:25:28,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9721d0-323b-4179-8c76-f3bd702632df/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-22 02:25:29,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9721d0-323b-4179-8c76-f3bd702632df/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-22 02:25:29,044 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:25:29,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:25:29,045 INFO L85 PathProgramCache]: Analyzing trace with hash 148101752, now seen corresponding path program 1 times [2022-11-22 02:25:29,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:25:29,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587972266] [2022-11-22 02:25:29,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:25:29,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:25:29,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:25:30,386 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-22 02:25:30,386 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:25:30,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587972266] [2022-11-22 02:25:30,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587972266] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:25:30,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765085696] [2022-11-22 02:25:30,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:25:30,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:25:30,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9721d0-323b-4179-8c76-f3bd702632df/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:25:30,388 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9721d0-323b-4179-8c76-f3bd702632df/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:25:30,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9721d0-323b-4179-8c76-f3bd702632df/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-22 02:25:30,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:25:30,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 1798 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-22 02:25:30,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:25:31,025 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-22 02:25:31,026 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:25:31,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765085696] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:25:31,026 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:25:31,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [18] total 20 [2022-11-22 02:25:31,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064429191] [2022-11-22 02:25:31,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:25:31,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:25:31,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:25:31,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:25:31,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-11-22 02:25:31,028 INFO L87 Difference]: Start difference. First operand 25123 states and 42827 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2022-11-22 02:25:32,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:25:32,364 INFO L93 Difference]: Finished difference Result 51840 states and 89203 transitions. [2022-11-22 02:25:32,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 02:25:32,365 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) Word has length 142 [2022-11-22 02:25:32,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:25:32,469 INFO L225 Difference]: With dead ends: 51840 [2022-11-22 02:25:32,469 INFO L226 Difference]: Without dead ends: 26779 [2022-11-22 02:25:32,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2022-11-22 02:25:32,526 INFO L413 NwaCegarLoop]: 545 mSDtfsCounter, 286 mSDsluCounter, 782 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 1327 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:25:32,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 1327 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:25:32,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26779 states. [2022-11-22 02:25:34,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26779 to 26625. [2022-11-22 02:25:34,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26625 states, 21348 states have (on average 1.669289863219037) internal successors, (35636), 22239 states have internal predecessors, (35636), 3752 states have call successors, (3752), 1320 states have call predecessors, (3752), 1524 states have return successors, (6648), 3389 states have call predecessors, (6648), 3747 states have call successors, (6648) [2022-11-22 02:25:34,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26625 states to 26625 states and 46036 transitions. [2022-11-22 02:25:34,167 INFO L78 Accepts]: Start accepts. Automaton has 26625 states and 46036 transitions. Word has length 142 [2022-11-22 02:25:34,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:25:34,167 INFO L495 AbstractCegarLoop]: Abstraction has 26625 states and 46036 transitions. [2022-11-22 02:25:34,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2022-11-22 02:25:34,168 INFO L276 IsEmpty]: Start isEmpty. Operand 26625 states and 46036 transitions. [2022-11-22 02:25:34,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-11-22 02:25:34,176 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:25:34,176 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 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] [2022-11-22 02:25:34,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9721d0-323b-4179-8c76-f3bd702632df/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-22 02:25:34,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9721d0-323b-4179-8c76-f3bd702632df/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-22 02:25:34,384 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:25:34,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:25:34,385 INFO L85 PathProgramCache]: Analyzing trace with hash -95245040, now seen corresponding path program 1 times [2022-11-22 02:25:34,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:25:34,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326285361] [2022-11-22 02:25:34,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:25:34,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:25:34,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:25:35,670 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-22 02:25:35,670 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:25:35,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326285361] [2022-11-22 02:25:35,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326285361] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:25:35,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088843179] [2022-11-22 02:25:35,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:25:35,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:25:35,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9721d0-323b-4179-8c76-f3bd702632df/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:25:35,675 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9721d0-323b-4179-8c76-f3bd702632df/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:25:35,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9721d0-323b-4179-8c76-f3bd702632df/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-22 02:25:36,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:25:36,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 1804 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-22 02:25:36,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:25:36,132 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-11-22 02:25:36,133 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:25:36,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088843179] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:25:36,133 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:25:36,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [18] total 20 [2022-11-22 02:25:36,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910479168] [2022-11-22 02:25:36,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:25:36,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:25:36,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:25:36,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:25:36,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-11-22 02:25:36,135 INFO L87 Difference]: Start difference. First operand 26625 states and 46036 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) [2022-11-22 02:25:37,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:25:37,269 INFO L93 Difference]: Finished difference Result 27958 states and 50408 transitions. [2022-11-22 02:25:37,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:25:37,275 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) Word has length 145 [2022-11-22 02:25:37,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:25:37,421 INFO L225 Difference]: With dead ends: 27958 [2022-11-22 02:25:37,422 INFO L226 Difference]: Without dead ends: 27872 [2022-11-22 02:25:37,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2022-11-22 02:25:37,443 INFO L413 NwaCegarLoop]: 517 mSDtfsCounter, 44 mSDsluCounter, 983 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 1500 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:25:37,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 1500 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:25:37,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27872 states. [2022-11-22 02:25:39,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27872 to 26785. [2022-11-22 02:25:39,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26785 states, 21508 states have (on average 1.6643109540636043) internal successors, (35796), 22399 states have internal predecessors, (35796), 3752 states have call successors, (3752), 1320 states have call predecessors, (3752), 1524 states have return successors, (6648), 3389 states have call predecessors, (6648), 3747 states have call successors, (6648) [2022-11-22 02:25:39,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26785 states to 26785 states and 46196 transitions. [2022-11-22 02:25:39,483 INFO L78 Accepts]: Start accepts. Automaton has 26785 states and 46196 transitions. Word has length 145 [2022-11-22 02:25:39,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:25:39,484 INFO L495 AbstractCegarLoop]: Abstraction has 26785 states and 46196 transitions. [2022-11-22 02:25:39,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) [2022-11-22 02:25:39,484 INFO L276 IsEmpty]: Start isEmpty. Operand 26785 states and 46196 transitions. [2022-11-22 02:25:39,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-11-22 02:25:39,502 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:25:39,503 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 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] [2022-11-22 02:25:39,518 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9721d0-323b-4179-8c76-f3bd702632df/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-22 02:25:39,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9721d0-323b-4179-8c76-f3bd702632df/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:25:39,712 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:25:39,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:25:39,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1669981693, now seen corresponding path program 1 times [2022-11-22 02:25:39,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:25:39,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585373333] [2022-11-22 02:25:39,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:25:39,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:25:39,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:25:41,073 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-11-22 02:25:41,073 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:25:41,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585373333] [2022-11-22 02:25:41,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585373333] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:25:41,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794268890] [2022-11-22 02:25:41,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:25:41,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:25:41,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9721d0-323b-4179-8c76-f3bd702632df/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:25:41,079 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9721d0-323b-4179-8c76-f3bd702632df/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:25:41,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9721d0-323b-4179-8c76-f3bd702632df/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-22 02:25:41,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:25:41,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 1868 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-22 02:25:41,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:25:42,639 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-11-22 02:25:42,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:25:45,555 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 9813 disjunctions. This might take some time... [2022-11-22 02:25:52,711 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 9813 disjunctions. [2022-11-22 02:25:53,080 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 9813 disjunctions. This might take some time... [2022-11-22 02:26:02,267 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 9813 disjunctions. [2022-11-22 02:26:02,738 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 9813 disjunctions. This might take some time...