./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.5.1.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edae2e87-02b3-4388-a65d-242035cd3853/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edae2e87-02b3-4388-a65d-242035cd3853/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edae2e87-02b3-4388-a65d-242035cd3853/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edae2e87-02b3-4388-a65d-242035cd3853/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.5.1.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edae2e87-02b3-4388-a65d-242035cd3853/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edae2e87-02b3-4388-a65d-242035cd3853/bin/utaipan-UUZaoUuFF8 --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 76e1fb283eaa9b9489ec46678de9c71238e259f3b18cc82b368e6453537b0902 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:17:12,341 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:17:12,344 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:17:12,404 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:17:12,404 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:17:12,409 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:17:12,411 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:17:12,415 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:17:12,418 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:17:12,423 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:17:12,424 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:17:12,427 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:17:12,427 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:17:12,430 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:17:12,432 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:17:12,437 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:17:12,439 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:17:12,440 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:17:12,442 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:17:12,451 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:17:12,453 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:17:12,456 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:17:12,460 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:17:12,461 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:17:12,470 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:17:12,471 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:17:12,471 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:17:12,474 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:17:12,475 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:17:12,476 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:17:12,477 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:17:12,478 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:17:12,480 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:17:12,482 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:17:12,483 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:17:12,484 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:17:12,485 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:17:12,485 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:17:12,485 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:17:12,486 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:17:12,487 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:17:12,488 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edae2e87-02b3-4388-a65d-242035cd3853/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:17:12,535 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:17:12,535 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:17:12,537 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:17:12,537 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:17:12,538 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:17:12,538 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:17:12,538 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:17:12,539 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:17:12,539 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:17:12,539 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:17:12,540 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:17:12,541 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:17:12,541 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:17:12,541 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:17:12,541 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:17:12,542 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:17:12,542 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:17:12,543 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:17:12,543 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:17:12,543 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:17:12,543 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:17:12,544 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:17:12,544 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:17:12,544 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:17:12,544 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:17:12,545 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:17:12,545 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:17:12,545 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:17:12,545 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:17:12,547 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:17:12,548 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:17:12,548 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:17:12,549 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:17:12,549 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:17:12,549 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:17:12,549 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:17:12,550 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:17:12,550 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:17:12,550 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:17:12,550 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_edae2e87-02b3-4388-a65d-242035cd3853/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edae2e87-02b3-4388-a65d-242035cd3853/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 76e1fb283eaa9b9489ec46678de9c71238e259f3b18cc82b368e6453537b0902 [2021-11-07 01:17:12,870 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:17:12,899 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:17:12,901 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:17:12,902 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:17:12,903 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:17:12,904 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edae2e87-02b3-4388-a65d-242035cd3853/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.5.1.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2021-11-07 01:17:12,968 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edae2e87-02b3-4388-a65d-242035cd3853/bin/utaipan-UUZaoUuFF8/data/e551e59e0/a7142613aba84777aae5b6ad5a2e5ac0/FLAG3aa23a71a [2021-11-07 01:17:13,898 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:17:13,901 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edae2e87-02b3-4388-a65d-242035cd3853/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.5.1.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2021-11-07 01:17:13,931 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edae2e87-02b3-4388-a65d-242035cd3853/bin/utaipan-UUZaoUuFF8/data/e551e59e0/a7142613aba84777aae5b6ad5a2e5ac0/FLAG3aa23a71a [2021-11-07 01:17:14,388 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edae2e87-02b3-4388-a65d-242035cd3853/bin/utaipan-UUZaoUuFF8/data/e551e59e0/a7142613aba84777aae5b6ad5a2e5ac0 [2021-11-07 01:17:14,392 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:17:14,394 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:17:14,396 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:17:14,396 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:17:14,399 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:17:14,400 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:17:14" (1/1) ... [2021-11-07 01:17:14,401 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@170f8191 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:17:14, skipping insertion in model container [2021-11-07 01:17:14,402 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:17:14" (1/1) ... [2021-11-07 01:17:14,409 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:17:14,552 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:17:15,487 WARN L228 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_edae2e87-02b3-4388-a65d-242035cd3853/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.5.1.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c[39479,39492] [2021-11-07 01:17:15,875 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:17:15,889 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:17:16,240 WARN L228 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_edae2e87-02b3-4388-a65d-242035cd3853/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.5.1.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c[39479,39492] [2021-11-07 01:17:16,568 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:17:16,600 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:17:16,601 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:17:16 WrapperNode [2021-11-07 01:17:16,601 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:17:16,602 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:17:16,602 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:17:16,603 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:17:16,610 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:17:16" (1/1) ... [2021-11-07 01:17:16,664 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:17:16" (1/1) ... [2021-11-07 01:17:16,829 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:17:16,842 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:17:16,842 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:17:16,842 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:17:16,853 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:17:16" (1/1) ... [2021-11-07 01:17:16,856 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:17:16" (1/1) ... [2021-11-07 01:17:16,876 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:17:16" (1/1) ... [2021-11-07 01:17:16,876 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:17:16" (1/1) ... [2021-11-07 01:17:16,971 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:17:16" (1/1) ... [2021-11-07 01:17:17,014 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:17:16" (1/1) ... [2021-11-07 01:17:17,028 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:17:16" (1/1) ... [2021-11-07 01:17:17,060 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:17:17,062 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:17:17,063 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:17:17,063 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:17:17,064 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:17:16" (1/1) ... [2021-11-07 01:17:17,072 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:17:17,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edae2e87-02b3-4388-a65d-242035cd3853/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:17:17,100 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edae2e87-02b3-4388-a65d-242035cd3853/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:17:17,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edae2e87-02b3-4388-a65d-242035cd3853/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:17:17,151 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 01:17:17,151 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:17:17,151 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:17:17,151 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:17:24,765 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:17:24,766 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-07 01:17:24,773 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:17:24 BoogieIcfgContainer [2021-11-07 01:17:24,773 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:17:24,775 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:17:24,775 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:17:24,779 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:17:24,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:17:14" (1/3) ... [2021-11-07 01:17:24,780 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d11ab74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:17:24, skipping insertion in model container [2021-11-07 01:17:24,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:17:16" (2/3) ... [2021-11-07 01:17:24,780 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d11ab74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:17:24, skipping insertion in model container [2021-11-07 01:17:24,781 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:17:24" (3/3) ... [2021-11-07 01:17:24,784 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.1.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2021-11-07 01:17:24,791 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:17:24,791 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 01:17:24,863 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:17:24,873 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 01:17:24,873 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 01:17:24,922 INFO L276 IsEmpty]: Start isEmpty. Operand has 1218 states, 1216 states have (on average 1.6998355263157894) internal successors, (2067), 1217 states have internal predecessors, (2067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:24,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2021-11-07 01:17:24,963 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:17:24,964 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:17:24,965 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:17:24,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:17:24,970 INFO L85 PathProgramCache]: Analyzing trace with hash 466061107, now seen corresponding path program 1 times [2021-11-07 01:17:24,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:17:24,980 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295184311] [2021-11-07 01:17:24,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:17:24,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:17:25,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:17:25,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:17:25,828 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:17:25,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295184311] [2021-11-07 01:17:25,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295184311] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:17:25,829 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:17:25,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:17:25,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447054140] [2021-11-07 01:17:25,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:17:25,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:17:25,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:17:25,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:17:25,856 INFO L87 Difference]: Start difference. First operand has 1218 states, 1216 states have (on average 1.6998355263157894) internal successors, (2067), 1217 states have internal predecessors, (2067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:26,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:17:26,125 INFO L93 Difference]: Finished difference Result 2424 states and 4078 transitions. [2021-11-07 01:17:26,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:17:26,127 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 270 [2021-11-07 01:17:26,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:17:26,161 INFO L225 Difference]: With dead ends: 2424 [2021-11-07 01:17:26,162 INFO L226 Difference]: Without dead ends: 1697 [2021-11-07 01:17:26,173 INFO L786 BasicCegarLoop]: 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 [2021-11-07 01:17:26,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1697 states. [2021-11-07 01:17:26,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1697 to 1695. [2021-11-07 01:17:26,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1695 states, 1694 states have (on average 1.588547815820543) internal successors, (2691), 1694 states have internal predecessors, (2691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:26,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1695 states to 1695 states and 2691 transitions. [2021-11-07 01:17:26,329 INFO L78 Accepts]: Start accepts. Automaton has 1695 states and 2691 transitions. Word has length 270 [2021-11-07 01:17:26,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:17:26,332 INFO L470 AbstractCegarLoop]: Abstraction has 1695 states and 2691 transitions. [2021-11-07 01:17:26,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:26,333 INFO L276 IsEmpty]: Start isEmpty. Operand 1695 states and 2691 transitions. [2021-11-07 01:17:26,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2021-11-07 01:17:26,341 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:17:26,342 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:17:26,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 01:17:26,342 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:17:26,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:17:26,346 INFO L85 PathProgramCache]: Analyzing trace with hash 610516734, now seen corresponding path program 1 times [2021-11-07 01:17:26,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:17:26,346 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320453606] [2021-11-07 01:17:26,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:17:26,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:17:26,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:17:26,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:17:26,764 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:17:26,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320453606] [2021-11-07 01:17:26,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320453606] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:17:26,765 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:17:26,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:17:26,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572876988] [2021-11-07 01:17:26,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:17:26,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:17:26,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:17:26,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:17:26,774 INFO L87 Difference]: Start difference. First operand 1695 states and 2691 transitions. Second operand has 3 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:26,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:17:26,942 INFO L93 Difference]: Finished difference Result 3691 states and 5813 transitions. [2021-11-07 01:17:26,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:17:26,944 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 280 [2021-11-07 01:17:26,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:17:26,965 INFO L225 Difference]: With dead ends: 3691 [2021-11-07 01:17:26,966 INFO L226 Difference]: Without dead ends: 2519 [2021-11-07 01:17:26,969 INFO L786 BasicCegarLoop]: 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 [2021-11-07 01:17:26,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2519 states. [2021-11-07 01:17:27,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2519 to 2517. [2021-11-07 01:17:27,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2517 states, 2516 states have (on average 1.5779014308426074) internal successors, (3970), 2516 states have internal predecessors, (3970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:27,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2517 states to 2517 states and 3970 transitions. [2021-11-07 01:17:27,089 INFO L78 Accepts]: Start accepts. Automaton has 2517 states and 3970 transitions. Word has length 280 [2021-11-07 01:17:27,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:17:27,091 INFO L470 AbstractCegarLoop]: Abstraction has 2517 states and 3970 transitions. [2021-11-07 01:17:27,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:27,092 INFO L276 IsEmpty]: Start isEmpty. Operand 2517 states and 3970 transitions. [2021-11-07 01:17:27,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2021-11-07 01:17:27,101 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:17:27,102 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:17:27,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 01:17:27,102 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:17:27,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:17:27,113 INFO L85 PathProgramCache]: Analyzing trace with hash -2074996419, now seen corresponding path program 1 times [2021-11-07 01:17:27,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:17:27,115 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909039505] [2021-11-07 01:17:27,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:17:27,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:17:27,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:17:27,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:17:27,332 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:17:27,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909039505] [2021-11-07 01:17:27,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909039505] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:17:27,334 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:17:27,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:17:27,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537453785] [2021-11-07 01:17:27,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:17:27,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:17:27,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:17:27,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:17:27,345 INFO L87 Difference]: Start difference. First operand 2517 states and 3970 transitions. Second operand has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:27,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:17:27,623 INFO L93 Difference]: Finished difference Result 5856 states and 9168 transitions. [2021-11-07 01:17:27,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:17:27,624 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 290 [2021-11-07 01:17:27,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:17:27,650 INFO L225 Difference]: With dead ends: 5856 [2021-11-07 01:17:27,650 INFO L226 Difference]: Without dead ends: 3890 [2021-11-07 01:17:27,653 INFO L786 BasicCegarLoop]: 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 [2021-11-07 01:17:27,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3890 states. [2021-11-07 01:17:27,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3890 to 3888. [2021-11-07 01:17:27,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3888 states, 3887 states have (on average 1.565217391304348) internal successors, (6084), 3887 states have internal predecessors, (6084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:27,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3888 states to 3888 states and 6084 transitions. [2021-11-07 01:17:27,896 INFO L78 Accepts]: Start accepts. Automaton has 3888 states and 6084 transitions. Word has length 290 [2021-11-07 01:17:27,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:17:27,897 INFO L470 AbstractCegarLoop]: Abstraction has 3888 states and 6084 transitions. [2021-11-07 01:17:27,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:27,897 INFO L276 IsEmpty]: Start isEmpty. Operand 3888 states and 6084 transitions. [2021-11-07 01:17:27,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2021-11-07 01:17:27,910 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:17:27,910 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:17:27,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 01:17:27,911 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:17:27,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:17:27,912 INFO L85 PathProgramCache]: Analyzing trace with hash 687432543, now seen corresponding path program 1 times [2021-11-07 01:17:27,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:17:27,912 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379297744] [2021-11-07 01:17:27,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:17:27,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:17:28,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:17:28,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:17:28,115 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:17:28,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379297744] [2021-11-07 01:17:28,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379297744] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:17:28,116 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:17:28,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:17:28,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601128002] [2021-11-07 01:17:28,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:17:28,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:17:28,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:17:28,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:17:28,119 INFO L87 Difference]: Start difference. First operand 3888 states and 6084 transitions. Second operand has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:28,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:17:28,478 INFO L93 Difference]: Finished difference Result 9394 states and 14588 transitions. [2021-11-07 01:17:28,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:17:28,479 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 300 [2021-11-07 01:17:28,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:17:28,519 INFO L225 Difference]: With dead ends: 9394 [2021-11-07 01:17:28,519 INFO L226 Difference]: Without dead ends: 6085 [2021-11-07 01:17:28,527 INFO L786 BasicCegarLoop]: 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 [2021-11-07 01:17:28,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6085 states. [2021-11-07 01:17:28,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6085 to 6083. [2021-11-07 01:17:28,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6083 states, 6082 states have (on average 1.5491614600460375) internal successors, (9422), 6082 states have internal predecessors, (9422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:28,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6083 states to 6083 states and 9422 transitions. [2021-11-07 01:17:28,986 INFO L78 Accepts]: Start accepts. Automaton has 6083 states and 9422 transitions. Word has length 300 [2021-11-07 01:17:28,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:17:28,987 INFO L470 AbstractCegarLoop]: Abstraction has 6083 states and 9422 transitions. [2021-11-07 01:17:28,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:28,988 INFO L276 IsEmpty]: Start isEmpty. Operand 6083 states and 9422 transitions. [2021-11-07 01:17:29,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2021-11-07 01:17:29,002 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:17:29,002 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:17:29,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 01:17:29,003 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:17:29,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:17:29,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1272536510, now seen corresponding path program 1 times [2021-11-07 01:17:29,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:17:29,004 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203565808] [2021-11-07 01:17:29,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:17:29,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:17:29,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:17:29,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:17:29,169 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:17:29,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203565808] [2021-11-07 01:17:29,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203565808] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:17:29,170 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:17:29,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:17:29,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781710003] [2021-11-07 01:17:29,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:17:29,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:17:29,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:17:29,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:17:29,173 INFO L87 Difference]: Start difference. First operand 6083 states and 9422 transitions. Second operand has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:29,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:17:29,652 INFO L93 Difference]: Finished difference Result 15272 states and 23472 transitions. [2021-11-07 01:17:29,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:17:29,653 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 310 [2021-11-07 01:17:29,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:17:29,714 INFO L225 Difference]: With dead ends: 15272 [2021-11-07 01:17:29,715 INFO L226 Difference]: Without dead ends: 9796 [2021-11-07 01:17:29,726 INFO L786 BasicCegarLoop]: 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 [2021-11-07 01:17:29,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9796 states. [2021-11-07 01:17:30,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9796 to 9794. [2021-11-07 01:17:30,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9794 states, 9793 states have (on average 1.5321147758603084) internal successors, (15004), 9793 states have internal predecessors, (15004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:30,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9794 states to 9794 states and 15004 transitions. [2021-11-07 01:17:30,372 INFO L78 Accepts]: Start accepts. Automaton has 9794 states and 15004 transitions. Word has length 310 [2021-11-07 01:17:30,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:17:30,372 INFO L470 AbstractCegarLoop]: Abstraction has 9794 states and 15004 transitions. [2021-11-07 01:17:30,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:30,373 INFO L276 IsEmpty]: Start isEmpty. Operand 9794 states and 15004 transitions. [2021-11-07 01:17:30,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2021-11-07 01:17:30,395 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:17:30,396 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:17:30,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 01:17:30,396 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:17:30,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:17:30,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1857142977, now seen corresponding path program 1 times [2021-11-07 01:17:30,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:17:30,397 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947404958] [2021-11-07 01:17:30,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:17:30,398 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:17:31,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:17:31,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:17:31,666 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:17:31,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947404958] [2021-11-07 01:17:31,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947404958] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:17:31,667 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:17:31,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:17:31,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797351646] [2021-11-07 01:17:31,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:17:31,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:17:31,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:17:31,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:17:31,670 INFO L87 Difference]: Start difference. First operand 9794 states and 15004 transitions. Second operand has 4 states, 4 states have (on average 80.0) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:32,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:17:32,891 INFO L93 Difference]: Finished difference Result 29111 states and 44575 transitions. [2021-11-07 01:17:32,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:17:32,892 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 80.0) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 320 [2021-11-07 01:17:32,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:17:32,959 INFO L225 Difference]: With dead ends: 29111 [2021-11-07 01:17:32,960 INFO L226 Difference]: Without dead ends: 19328 [2021-11-07 01:17:32,977 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:17:33,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19328 states. [2021-11-07 01:17:34,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19328 to 19326. [2021-11-07 01:17:34,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19326 states, 19325 states have (on average 1.5279172056921086) internal successors, (29527), 19325 states have internal predecessors, (29527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:34,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19326 states to 19326 states and 29527 transitions. [2021-11-07 01:17:34,338 INFO L78 Accepts]: Start accepts. Automaton has 19326 states and 29527 transitions. Word has length 320 [2021-11-07 01:17:34,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:17:34,339 INFO L470 AbstractCegarLoop]: Abstraction has 19326 states and 29527 transitions. [2021-11-07 01:17:34,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 80.0) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:34,340 INFO L276 IsEmpty]: Start isEmpty. Operand 19326 states and 29527 transitions. [2021-11-07 01:17:34,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2021-11-07 01:17:34,378 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:17:34,378 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:17:34,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 01:17:34,379 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:17:34,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:17:34,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1853420255, now seen corresponding path program 1 times [2021-11-07 01:17:34,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:17:34,383 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723219903] [2021-11-07 01:17:34,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:17:34,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:17:34,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:17:34,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:17:34,543 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:17:34,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723219903] [2021-11-07 01:17:34,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723219903] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:17:34,544 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:17:34,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:17:34,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103809444] [2021-11-07 01:17:34,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:17:34,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:17:34,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:17:34,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:17:34,546 INFO L87 Difference]: Start difference. First operand 19326 states and 29527 transitions. Second operand has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:35,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:17:35,946 INFO L93 Difference]: Finished difference Result 45119 states and 69172 transitions. [2021-11-07 01:17:35,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:17:35,948 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 322 [2021-11-07 01:17:35,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:17:36,019 INFO L225 Difference]: With dead ends: 45119 [2021-11-07 01:17:36,020 INFO L226 Difference]: Without dead ends: 26736 [2021-11-07 01:17:36,049 INFO L786 BasicCegarLoop]: 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 [2021-11-07 01:17:36,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26736 states. [2021-11-07 01:17:37,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26736 to 26734. [2021-11-07 01:17:37,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26734 states, 26733 states have (on average 1.5271387423783338) internal successors, (40825), 26733 states have internal predecessors, (40825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:37,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26734 states to 26734 states and 40825 transitions. [2021-11-07 01:17:37,333 INFO L78 Accepts]: Start accepts. Automaton has 26734 states and 40825 transitions. Word has length 322 [2021-11-07 01:17:37,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:17:37,334 INFO L470 AbstractCegarLoop]: Abstraction has 26734 states and 40825 transitions. [2021-11-07 01:17:37,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:37,334 INFO L276 IsEmpty]: Start isEmpty. Operand 26734 states and 40825 transitions. [2021-11-07 01:17:37,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2021-11-07 01:17:37,375 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:17:37,375 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:17:37,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-07 01:17:37,376 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:17:37,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:17:37,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1725098437, now seen corresponding path program 1 times [2021-11-07 01:17:37,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:17:37,377 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092547246] [2021-11-07 01:17:37,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:17:37,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:17:37,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:17:37,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:17:37,552 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:17:37,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092547246] [2021-11-07 01:17:37,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092547246] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:17:37,553 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:17:37,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:17:37,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017491507] [2021-11-07 01:17:37,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:17:37,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:17:37,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:17:37,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:17:37,555 INFO L87 Difference]: Start difference. First operand 26734 states and 40825 transitions. Second operand has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:39,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:17:39,538 INFO L93 Difference]: Finished difference Result 79238 states and 120916 transitions. [2021-11-07 01:17:39,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:17:39,539 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 322 [2021-11-07 01:17:39,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:17:39,686 INFO L225 Difference]: With dead ends: 79238 [2021-11-07 01:17:39,686 INFO L226 Difference]: Without dead ends: 52688 [2021-11-07 01:17:39,734 INFO L786 BasicCegarLoop]: 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 [2021-11-07 01:17:39,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52688 states. [2021-11-07 01:17:42,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52688 to 52686. [2021-11-07 01:17:42,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52686 states, 52685 states have (on average 1.5228433140362532) internal successors, (80231), 52685 states have internal predecessors, (80231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:42,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52686 states to 52686 states and 80231 transitions. [2021-11-07 01:17:42,215 INFO L78 Accepts]: Start accepts. Automaton has 52686 states and 80231 transitions. Word has length 322 [2021-11-07 01:17:42,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:17:42,215 INFO L470 AbstractCegarLoop]: Abstraction has 52686 states and 80231 transitions. [2021-11-07 01:17:42,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:42,216 INFO L276 IsEmpty]: Start isEmpty. Operand 52686 states and 80231 transitions. [2021-11-07 01:17:42,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2021-11-07 01:17:42,339 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:17:42,339 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:17:42,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-07 01:17:42,340 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:17:42,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:17:42,341 INFO L85 PathProgramCache]: Analyzing trace with hash 187505122, now seen corresponding path program 1 times [2021-11-07 01:17:42,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:17:42,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664167597] [2021-11-07 01:17:42,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:17:42,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:17:42,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:17:42,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:17:42,431 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:17:42,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664167597] [2021-11-07 01:17:42,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664167597] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:17:42,432 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:17:42,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:17:42,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642882021] [2021-11-07 01:17:42,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:17:42,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:17:42,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:17:42,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:17:42,441 INFO L87 Difference]: Start difference. First operand 52686 states and 80231 transitions. Second operand has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:46,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:17:46,452 INFO L93 Difference]: Finished difference Result 157980 states and 240562 transitions. [2021-11-07 01:17:46,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:17:46,453 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 323 [2021-11-07 01:17:46,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:17:46,665 INFO L225 Difference]: With dead ends: 157980 [2021-11-07 01:17:46,666 INFO L226 Difference]: Without dead ends: 105336 [2021-11-07 01:17:46,766 INFO L786 BasicCegarLoop]: 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 [2021-11-07 01:17:46,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105336 states. [2021-11-07 01:17:49,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105336 to 52728. [2021-11-07 01:17:49,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52728 states, 52727 states have (on average 1.5227492555995978) internal successors, (80290), 52727 states have internal predecessors, (80290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:50,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52728 states to 52728 states and 80290 transitions. [2021-11-07 01:17:50,061 INFO L78 Accepts]: Start accepts. Automaton has 52728 states and 80290 transitions. Word has length 323 [2021-11-07 01:17:50,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:17:50,061 INFO L470 AbstractCegarLoop]: Abstraction has 52728 states and 80290 transitions. [2021-11-07 01:17:50,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:50,062 INFO L276 IsEmpty]: Start isEmpty. Operand 52728 states and 80290 transitions. [2021-11-07 01:17:50,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2021-11-07 01:17:50,116 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:17:50,117 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:17:50,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-07 01:17:50,117 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:17:50,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:17:50,118 INFO L85 PathProgramCache]: Analyzing trace with hash -2078526899, now seen corresponding path program 1 times [2021-11-07 01:17:50,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:17:50,119 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85863309] [2021-11-07 01:17:50,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:17:50,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:17:50,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:17:50,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:17:50,258 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:17:50,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85863309] [2021-11-07 01:17:50,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85863309] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:17:50,258 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:17:50,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:17:50,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772544662] [2021-11-07 01:17:50,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:17:50,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:17:50,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:17:50,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:17:50,261 INFO L87 Difference]: Start difference. First operand 52728 states and 80290 transitions. Second operand has 3 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:53,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:17:53,679 INFO L93 Difference]: Finished difference Result 122192 states and 186758 transitions. [2021-11-07 01:17:53,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:17:53,680 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 324 [2021-11-07 01:17:53,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:17:53,809 INFO L225 Difference]: With dead ends: 122192 [2021-11-07 01:17:53,810 INFO L226 Difference]: Without dead ends: 71594 [2021-11-07 01:17:53,857 INFO L786 BasicCegarLoop]: 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 [2021-11-07 01:17:54,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71594 states. [2021-11-07 01:17:57,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71594 to 71592. [2021-11-07 01:17:57,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71592 states, 71591 states have (on average 1.5196882289673284) internal successors, (108796), 71591 states have internal predecessors, (108796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:58,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71592 states to 71592 states and 108796 transitions. [2021-11-07 01:17:58,139 INFO L78 Accepts]: Start accepts. Automaton has 71592 states and 108796 transitions. Word has length 324 [2021-11-07 01:17:58,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:17:58,140 INFO L470 AbstractCegarLoop]: Abstraction has 71592 states and 108796 transitions. [2021-11-07 01:17:58,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:58,140 INFO L276 IsEmpty]: Start isEmpty. Operand 71592 states and 108796 transitions. [2021-11-07 01:17:58,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2021-11-07 01:17:58,244 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:17:58,245 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:17:58,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-07 01:17:58,245 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:17:58,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:17:58,246 INFO L85 PathProgramCache]: Analyzing trace with hash 189654144, now seen corresponding path program 1 times [2021-11-07 01:17:58,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:17:58,247 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355938184] [2021-11-07 01:17:58,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:17:58,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:17:58,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:17:58,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:17:58,444 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:17:58,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355938184] [2021-11-07 01:17:58,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355938184] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:17:58,444 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:17:58,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:17:58,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812315624] [2021-11-07 01:17:58,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:17:58,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:17:58,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:17:58,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:17:58,448 INFO L87 Difference]: Start difference. First operand 71592 states and 108796 transitions. Second operand has 3 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:18:05,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:18:05,235 INFO L93 Difference]: Finished difference Result 211937 states and 321823 transitions. [2021-11-07 01:18:05,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:18:05,236 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 324 [2021-11-07 01:18:05,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:18:05,516 INFO L225 Difference]: With dead ends: 211937 [2021-11-07 01:18:05,516 INFO L226 Difference]: Without dead ends: 140691 [2021-11-07 01:18:05,591 INFO L786 BasicCegarLoop]: 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 [2021-11-07 01:18:05,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140691 states.